Microgrids are amazing. On a microscale (my house, for instance), a microgrid is simple — solar feeds a battery which powers my house when there's no sun. It would get challenged to do more than that. But "more than that" is what larger scale microgrids need. Control systems, multiple energy inputs, storage, distribution, control […]

L'innovation en matière d'énergie renouvelable ne se limite pas aux panneaux solaires. Du côté des éoliennes aussi, les entreprises se creusent la tête pour mettre au point des technologies plus efficaces et moins bruyantes. Cette éolienne silencieuse produit 50% d'énergie en plus que le photovoltaïque

A fault identification may be triggered by a component of a power generation system (PGS), such as a hardware component, a controller of a hardware component, a device of the PGS, a computer connected to the PGS, a computer configured to monitor the PGS, and/or the like. The fault identification may be the result of a failure of a component of the PGS, a future failure of a component of the PGS, a routine maintenance of the PGS, and/or the like. The fault is converted to a notification on a user interface using a mapping of faults, root-causes, notification rules, and/or the like. The conversion may use one or more lookup tables and/or formulas for determining the impact of the fault on the PGS, and/or the like.

Embodiments are directed to a microgrid power system, and applications thereof. In an embodiment, the microgrid power system comprises a power station including an AC power source and a stabilizing battery system. The power station may be configured to generate an AC power and to provide the first AC power to a power distribution network. A plurality of load centers may be connected to the power distribution system. Each load center may include a local battery and a switch connecting the power station to a local load. A system controller may open the switch to provide power from the local battery to the local load, and close the switch to provide power from the power station to the local load. In an embodiment, a microgrid controller may determine an amount of AC power generated by the power station that may be consumed by each load center.

Energy Management Solution (EMS) sounds familiar in recent days for its advantages and solution to monitor and analyse energy consumption. EMS plays a vital role in the energy sector and in the field with bottom-line business priority. This paper proposes an EMS solution to the smart microgrid through an Internet of Things (IoT)-based unified framework. The IoT-based unified framework provides energy efficient optimization and scheduling to the smart microgrid. This work also discusses the energy harvest and energy trading in the rural area where the smart microgrid has been installed. The advantages of the proposed IoT framework are it provides adequate control on the renewable energy resources and optimize the load scheduling based on the energy harvest. To prove the EMS using the developed framework, a simulation analysis has been carried out. The obtained simulation results show the essential requirement of energy management solutions and the optimal performance of the proposed IoT framework.

Several methods for analyzing photovoltaic (PV) systems under partial shading conditions (PSC) can be found in the literature. However, the simplest methods are not very accurate. This article presents (1) a simple and accurate method to model I–V curves for PSC and (2) an improvement of a simplified method, without calculating the I–V curves, to accurately estimate the energy generated by PV systems under PSC. The I–V curves of two PV modules under PSC were measured. The measured curves were compared with modeled curves using two methods from the literature and a new proposed method. Four simplified methods from the literature for estimating the energy generated by PV systems were analyzed. The accuracy of these methods was investigated by comparing the calculated values with measured data from a PV system. For modeling the I–V curves, the new method showed a mean absolute percentage error of 1.5% and proved to be accurate. For the evaluated PV system, using a monthly database and the proposed diffuse shading factor resulted in differences between the measured and modeled results of up to 10% per month and 5% for the entire measurement period. The two proposed methods are simple and accurate. © 2022 Elsevier Ltd PublicationName: Renewable EnergyAffiliations: Universidade Federal do Rio Grande do Sul / Brazil doi: 10.1016/j.renene.2022.10.035 eIssn: 18790682 Volume: 200 IssueIdentifier:

In this article, a new high voltage gain quasi-Z-source (QZS) dc-dc converter suitable for renewable energy applications is presented. The proposed converter utilizes a zero voltage transition auxiliary circuit with coupled inductors to provide soft-switching conditions for all switches for a wide range of output power. In addition, a switched capacitor circuit is employed to obtain a higher voltage gain and lower voltage stress. The main advantages of the proposed converter include high voltage gain, high efficiency, reduced switch and diode voltage stress, continuous input current, and common ground between the output and input, which are important features for photovoltaic applications. In this circuit, the reverse recovery problem of diodes is alleviated. Operating principles and design considerations of the proposed converter are analyzed. Moreover, to prove the validity of the theoretical analysis, a 200-W prototype of the proposed converter is implemented and the experimental results are shown. © 1986-2012 IEEE. PublicationName: IEEE Transactions on Power ElectronicsAffiliations: University of Alberta / Canada doi: 10.1109/TPEL.2022.3178140 eIssn: 19410107 Volume: 37 IssueIdentifier: 11

L'autre atout incontestable du solaire réside dans la facilité et la massivité de son déploiement. Les équipements s'installent partout : chez le particulier,

Herein is disclosed a wave power system for extracting energy from water waves. The wave power system includes a basic structure, at least one effector movably engaged with the basic structure and adapted for being moved relative to the basic structure by water waves, and an energy harvesting arrangement arranged for harvesting energy from the relative movements between the energy collector and the basic structure The basic structure i a plurality of duct sections releasable connected to each other. Conveniently, the wave power system includes several effectors.

LE TAMPON. La mission régionale de l'Autorité environnementale a émis un avis sur le projet de centra...

Swedish-Israeli wave energy company Eco Wave Power has released financial results for the first half of 2022, marking a significant rise in net financial income due to foreign exchange differences. The post Eco Wave Power's net income grows amid currency fluctuations appeared first on Offshore Energy .

A.6 Consolidated Matrix of ISO/IEC 24751-2 Terms and Definitions in ISO French ...exister EXEMPLE Un label pour un emplacement particulier tel qu’un domicile, un lieu de travail ou une école, ou un moment particulier de la journée tel que tard dans... Bibliography ...disabilities [2] ISO 704:2000 (E/F), Terminology work — Principles and methods/Travail terminologique — Principes et méthodes [3] ISO 1087-1:2000 (E/F),...

A.5 Consolidated list of ISO/IEC 15944-8 terms and definitions ...designation 02 représentation d’un concept par un signe qui le dénomme NOTE Dans le travail terminologique, on distingue trois types de désignation les symboles, les appellations (c-à-...

Disclosed is a WEC module for connection to a WEC system having a power take-off (PTO) configured to generate electricity in response to fluid flow in a fluid flow path of the system. The module comprises a mounting portion for releasably mounting the module to the system, a deformable sealing member configured to provide a sealed fluid connection between the module and the fluid flow path, and a working surface configured to exchange, in response to wave motion, a working fluid with the fluid flow path via the sealed fluid connection. Also disclosed is a WEC system and a method of deploying the WEC module. Also disclosed is an installation device for a working surface and a method of installing a working surface.

Une équipe de l'Université de Kingston vient de procéder au test d'une nouvelle conception de turbine hydroélectrique. Elle serait capable de produire suffisamment d'énergie pour éclairer une partie de la Tamise, en Angleterre. L'article Une hydrolienne verticale montée sur un ponton va éclairer une partie de la Tamise est apparu en premier sur NeozOne .

  Microgrids are amazing. On a microscale (my house, for instance), a microgrid is simple — solar feeds a battery which powers my house when there's no sun. It would get challenged to do more than that. But "more than that" is what larger scale microgrids need. Control systems, multiple energy inputs, storage, distribution, control […]

L'innovation en matière d'énergie renouvelable ne se limite pas aux panneaux solaires. Du côté des éoliennes aussi, les entreprises se creusent la tête pour mettre au point des technologies plus efficaces et moins bruyantes. Cette éolienne silencieuse produit 50% d'énergie en plus que le photovoltaïque

L'autre atout incontestable du solaire réside dans la facilité et la massivité de son déploiement. Les équipements s'installent partout : chez le particulier,

LE TAMPON. La mission régionale de l'Autorité environnementale a émis un avis sur le projet de centra...

Swedish-Israeli wave energy company Eco Wave Power has released financial results for the first half of 2022, marking a significant rise in net financial income due to foreign exchange differences. The post Eco Wave Power's net income grows amid currency fluctuations appeared first on Offshore Energy .

Une équipe de l'Université de Kingston vient de procéder au test d'une nouvelle conception de turbine hydroélectrique. Elle serait capable de produire suffisamment d'énergie pour éclairer une partie de la Tamise, en Angleterre. L'article Une hydrolienne verticale montée sur un ponton va éclairer une partie de la Tamise est apparu en premier sur NeozOne .

A.6 Consolidated Matrix of ISO/IEC 24751-2 Terms and Definitions in ISO French ...exister EXEMPLE Un label pour un emplacement particulier tel qu’un domicile, un lieu de travail ou une école, ou un moment particulier de la journée tel que tard dans... Bibliography ...disabilities [2] ISO 704:2000 (E/F), Terminology work — Principles and methods/Travail terminologique — Principes et méthodes [3] ISO 1087-1:2000 (E/F),...

A.5 Consolidated list of ISO/IEC 15944-8 terms and definitions ...designation 02 représentation d’un concept par un signe qui le dénomme NOTE Dans le travail terminologique, on distingue trois types de désignation les symboles, les appellations (c-à-...

Energy Management Solution (EMS) sounds familiar in recent days for its advantages and solution to monitor and analyse energy consumption. EMS plays a vital role in the energy sector and in the field with bottom-line business priority. This paper proposes an EMS solution to the smart microgrid through an Internet of Things (IoT)-based unified framework. The IoT-based unified framework provides energy efficient optimization and scheduling to the smart microgrid. This work also discusses the energy harvest and energy trading in the rural area where the smart microgrid has been installed. The advantages of the proposed IoT framework are it provides adequate control on the renewable energy resources and optimize the load scheduling based on the energy harvest. To prove the EMS using the developed framework, a simulation analysis has been carried out. The obtained simulation results show the essential requirement of energy management solutions and the optimal performance of the proposed IoT framework.

Several methods for analyzing photovoltaic (PV) systems under partial shading conditions (PSC) can be found in the literature. However, the simplest methods are not very accurate. This article presents (1) a simple and accurate method to model I–V curves for PSC and (2) an improvement of a simplified method, without calculating the I–V curves, to accurately estimate the energy generated by PV systems under PSC. The I–V curves of two PV modules under PSC were measured. The measured curves were compared with modeled curves using two methods from the literature and a new proposed method. Four simplified methods from the literature for estimating the energy generated by PV systems were analyzed. The accuracy of these methods was investigated by comparing the calculated values with measured data from a PV system. For modeling the I–V curves, the new method showed a mean absolute percentage error of 1.5% and proved to be accurate. For the evaluated PV system, using a monthly database and the proposed diffuse shading factor resulted in differences between the measured and modeled results of up to 10% per month and 5% for the entire measurement period. The two proposed methods are simple and accurate. © 2022 Elsevier Ltd PublicationName: Renewable EnergyAffiliations: Universidade Federal do Rio Grande do Sul / Brazil doi: 10.1016/j.renene.2022.10.035 eIssn: 18790682 Volume: 200 IssueIdentifier:

In this article, a new high voltage gain quasi-Z-source (QZS) dc-dc converter suitable for renewable energy applications is presented. The proposed converter utilizes a zero voltage transition auxiliary circuit with coupled inductors to provide soft-switching conditions for all switches for a wide range of output power. In addition, a switched capacitor circuit is employed to obtain a higher voltage gain and lower voltage stress. The main advantages of the proposed converter include high voltage gain, high efficiency, reduced switch and diode voltage stress, continuous input current, and common ground between the output and input, which are important features for photovoltaic applications. In this circuit, the reverse recovery problem of diodes is alleviated. Operating principles and design considerations of the proposed converter are analyzed. Moreover, to prove the validity of the theoretical analysis, a 200-W prototype of the proposed converter is implemented and the experimental results are shown. © 1986-2012 IEEE. PublicationName: IEEE Transactions on Power ElectronicsAffiliations: University of Alberta / Canada doi: 10.1109/TPEL.2022.3178140 eIssn: 19410107 Volume: 37 IssueIdentifier: 11

A fault identification may be triggered by a component of a power generation system (PGS), such as a hardware component, a controller of a hardware component, a device of the PGS, a computer connected to the PGS, a computer configured to monitor the PGS, and/or the like. The fault identification may be the result of a failure of a component of the PGS, a future failure of a component of the PGS, a routine maintenance of the PGS, and/or the like. The fault is converted to a notification on a user interface using a mapping of faults, root-causes, notification rules, and/or the like. The conversion may use one or more lookup tables and/or formulas for determining the impact of the fault on the PGS, and/or the like.

Embodiments are directed to a microgrid power system, and applications thereof. In an embodiment, the microgrid power system comprises a power station including an AC power source and a stabilizing battery system. The power station may be configured to generate an AC power and to provide the first AC power to a power distribution network. A plurality of load centers may be connected to the power distribution system. Each load center may include a local battery and a switch connecting the power station to a local load. A system controller may open the switch to provide power from the local battery to the local load, and close the switch to provide power from the power station to the local load. In an embodiment, a microgrid controller may determine an amount of AC power generated by the power station that may be consumed by each load center.

Herein is disclosed a wave power system for extracting energy from water waves. The wave power system includes a basic structure, at least one effector movably engaged with the basic structure and adapted for being moved relative to the basic structure by water waves, and an energy harvesting arrangement arranged for harvesting energy from the relative movements between the energy collector and the basic structure The basic structure i a plurality of duct sections releasable connected to each other. Conveniently, the wave power system includes several effectors.

Disclosed is a WEC module for connection to a WEC system having a power take-off (PTO) configured to generate electricity in response to fluid flow in a fluid flow path of the system. The module comprises a mounting portion for releasably mounting the module to the system, a deformable sealing member configured to provide a sealed fluid connection between the module and the fluid flow path, and a working surface configured to exchange, in response to wave motion, a working fluid with the fluid flow path via the sealed fluid connection. Also disclosed is a WEC system and a method of deploying the WEC module. Also disclosed is an installation device for a working surface and a method of installing a working surface.

Various arrangements for using captured voice to generate a custom interface controller are presented. A vocal recording from a user may be captured in which a spoken command and multiple smart-home devices are indicated. One or more common functions that map to the multiple smart-home devices may be determined. A custom interface controller may be generated that controls the one or more common functions of each smart-home device of the multiple smart-home devices.

The present invention relates to the technical field of smart home, and specifically relates to a control method for a smart clothes treatment system, aiming at solving the problem that an existing linkage method is more suitable for being applied to a system of associated home appliances that work according to the same operating parameters and the linkage mobility and the degree of intelligence are not good. The control method of the smart clothes treatment system can automatically recommend care parameter information of a clothes care device according to washing parameter information of a clothes washing device, so that the clothes care device can directly operate on the basis of the recommended care parameter information. The control method can be appliable to a combination of linkage home appliances having different types of operating parameters such as the clothes washing device and the clothes care device, so that multiple home appliances having a large difference in operating parameters can perform linkage operation on the basis of a specific matching scenario, improving the linkage mobility and degree of intelligence of the entire linkage system, saving the parameter generation and processing time of the associated home appliances, and improving the data processing efficiency of the associated home appliances.

Abstract The reuse and integration of data give big opportunities, supported by the FAIR data principles. Seamless data integration from heterogenous sources has been an interest of the geospatial community for a long time. However, 3D city models, building information models, and information supporting smart cities present higher semantic and geometrical complexity, which pose new challenges never tackled in a comprehensive methodology. Building on previous theories and studies, this article proposes an overarching workflow and framework for multisource (geo)spatial data integration. It starts from the definition of use case‐based requirements for the integrated data, guides the analysis of integrability of the involved datasets, suggesting actions to harmonize them, until data merging and validation. It is finally tested and exemplified in a case study. This approach allows the development of consistent, well‐documented, and inclusive data integration workflows, for the sake of use case automation in various geospatial domains and the production of interoperable and reusable data.

Abstract The emerging moisture‐driven energy generation (MEG) technology opens up new possibilities for humidity‐responsive materials, devices and interdisciplinary opportunities in fields like information security. However, such potential remains untapped. Here, we report an original MEG structure with a hygro‐ionic energy‐conversion route by selective coating of ionic hygroscopic hydrogels on a carbon black surface. The hygro‐ionic route features a process in which the scavenged energy is stored in the electrical double layers formed at the interfaces between the ionic hydrogel and the carbon nanoparticles. The resultant electrical field developed across the hydrogel‐coated wet carbon and the rest dry carbon area is thus durably lasted. Based on this unique structure, we put forward the hygro‐electronic information interfaces (HEII) for humidity‐regulated information encryption and display by devising the hydrogel patterns on the carbon platform. Further by tuning the hygroscopicity of ionic hydrogels and incorporating encoding methods (e.g., Morse code), we demonstrate that the HEII platform is programmable to carry different information in certain humidity ranges. Unlike those conventional anticounterfeiting methods that optically reveal the hidden information once the required stimulus is provided, the new HEII serves as a hierarchical solution for high‐security encryption and display. This article is protected by copyright. All rights reserved

This review analyzes the latest advances in thermoelectric nanogenerator (TENG) materials, design and fabrication for common and promising applications, including wearable electronics, sensors, implantable electronics, solar energy conversion and waste heat recovery. Unlike other earlier reviews, this manuscript focuses on how cutting‐edge nanotechnology has been used to maximize thermoelectric power output and enable the design of flexible and lightweight devices. Abstract Thermoelectric nanogenerators (TENGs) are promising sustainable energy devices that utilize thermoelectric (TE) effect of nanomaterials to convert a temperature gradient into electrical energy. Compared to bulk thermoelectric generators (TEGs) that are commercially available, TENGs are more flexible and power‐dense, owing to their tuneable nanostructures. Hence, smaller TENGs are better suited for small form‐factor applications like wearable electronics, internet of things (IoT) devices, and self‐powered sensors. However, the higher complexity and cost of TENGs than TEGs inhibit their widespread adoption. This review appraises the latest advances in TENG materials, design, and fabrication in optimizing the performance of TENGs, making TENGs more viable for real‐world applications. More precisely, this work examines how nanostructure engineering, nanomaterial compositing, and post‐synthesis treatment approaches have enhanced the TE properties of common and promising TE materials, including tellurides, selenides, metal oxides, metal alloys, silicon, carbon nanomaterials, and organic compounds. Given that the TE material is a key component in TENGs, this review highlights how to optimize other vital parameters, including the TENG configuration, contact interface, form factor, heat sink use, and folded shape for specific applications. Lastly, critical attributes of TENGs used in wearable electronics, sensors, implantable electronics, solar energy conversion, and waste heat recovery are analyzed.

Ionogels are an emerging class of hybrid materials endowed with outstanding thermal, electrical, and mechanical properties. This material system\'s high versatility and superior tunability attract significant interest among researchers encompassing a broad spectrum of applications, including energy, flexible electronics, and biomedical. This review paper focuses on exploring the interactions within ionogels and their influence on electrochemical and mechanical performance. Abstract Ionogels have established themselves as an intriguing type of composites, owing to their distinctive properties, including superior thermal stability, non‐flammability, tunable electrochemical stability window, and high ionic conductivity. Hybrid materials based on ionic liquids (ionogels) are held together by interfaces arising out of intermolecular interactions, including electrostatic, van der Waals, solvophobic, steric, and hydrogen bonding. The interfaces within the ionic liquid (ILs) and its multifaceted interplay with the encapsulating matrix greatly influence the physicochemical and electronic/ionic interactions within the composite resulting in exceptional characteristics, allowing for the design of ionogels for targeted applications. Though ionogels have shown superior properties comparable to neat ILs, they still exhibit relatively low mechanical strength, limiting their application in several practical technologies. Simultaneous enhancement of mechanical durability while retaining high ionic conductivity is indispensable, which requires understanding interfaces and related influencing parameters. This review provides a synergetic comprehension, focusing on the interactive forces and factors affecting the conductivity, stability, and robustness of ionogels. Correlating with interfaces, several strategies, including the implications of nanofiller incorporation on the electromechanical properties of ionogel, are also elaborated. Finally, a primer is provided on the application of ionogels in sensors and energy harvesting technologies.

The disclosed invention includes a dwelling fixture. The dwelling fixture includes a compartment configured to contain packages delivered to the dwelling, an interior door to access the compartment from the interior of the dwelling, and an exterior door to access the compartment from the exterior of the dwelling. The interior door and/or exterior door includes a locking mechanism to secure the compartment. The dwelling fixture is easily and securely installable through the walls of the dwelling. The exterior door is flush with the exterior of the dwelling and aesthetically integrated with trim that adapts to any exterior finish.

Disclosed in the present invention are a household appliance control method and device. In the control method, an operation process of a household appliance is divided into multiple operation stages according to the execution order; a control module reads an instruction from an NFC tag; the control module deletes an instruction stored in the NFC tag; the control module obtains a next instruction, the next instruction being an instruction corresponding to a next operation stage of an operation stage of the household appliance corresponding to the instruction read by the control module from the NFC tag; and the control module writes the obtained next instruction into the NFC tag. In the present invention, after an instruction in the NFC tag is read, an instruction in the NFC tag is deleted, the next instruction is written into the NFC tag, and a user touches a same NFC tag for multiple times to allow the household appliance to execute multiple instructions according to the execution order, thereby completing the complete control of the household appliance, and facilitating the use of the user.

The present application relates to the technical field of intelligent air conditioners, and discloses a method, apparatus, and system for environment control in a smart home system, and a device. The smart home system comprises: a cloud control device and one or more home environment adjusting devices communicationally connected to the cloud control device. The method comprises: when it is determined that a user in a home environment is in a falling-asleep state, sending a falling-asleep control instruction to the home environment adjusting devices, such that the home environment is in a preset falling-asleep scenario; when it is determined that the user is in a sleeping state, sending a sleeping control instruction to the home environment adjusting devices, such that the home environment is in a preset sleeping scenario; and when it is determined that the user is in an awakening state, sending an awakening control instruction to the home environment adjusting devices, such that the home environment is in a preset awakening scenario. In this way, the smart scenario of the sleep environment is realized, and the home intelligence is improved.

Abstract The communication channel between the smart home devices and the remote users is susceptible to numerous privacy and security compromise attacks. To address these issues, many authentication protocols have been developed. However, majority of these security schemes have vulnerabilities that may still be exploited to wreck havoc in smart homes. For instance, protocols based on low entropy passwords can be broken by polynomial time adversaries. Apart from security and privacy challenges, efficiency of the entire authentication process is another challenge that needs to be solved. To this end, most of the conventional smart home authentication protocols incur extensive storage, computation as well as communication overheads which are unsuitable for resource limited smart home devices. In this paper, an anonymous lightweight protocol is developed, based on one-way hashing and elliptic curve point multiplication operations. Formal verification of this protocol is executed using ProVerif while its informal security analysis demonstrates its robustness against majority of the smart home privacy and security attacks. In terms of operational efficiency, comparative analysis is carried out which shows that it incurs relatively low computation, storage and communication overheads.

Highlights • A bee-inspired, fully distributed, and open-source building IoT solution • Strong flexibility and robustness, multiple functionalities, and easy deployment • Proposed vision-based deep-learning occupancy measurement with superior performance • High user acceptance during long-term stable operation The bigger picture Due to the complex and changing needs of building systems, existing building automation technologies are generally challenging to deploy, with poor robustness and high energy consumption. Inspired by bee swarms, we propose Honeycomb, an open-source system that combines distributed technologies with smart buildings to fill this gap. Like a honeycomb in nature, we see the whole building as interconnected “cells,” smart nodes deployed in blocks as “bees,” and distributed applications as “genes.” Honeycomb exhibits advancements compared with state-of-the-art smart building solutions: (1) robustness and flexibility to complex cases; (2) multi-functionality for operating tasks and energy saving; (3) easy deployment and compatibility to existing building systems; and (4) deep-learning perception is integrated with building control. Operating results have shown that Honeycomb significantly reduces the energy consumption of equipment, while users indicate a high level of acceptance in practice. Summary Restricted by the hierarchical and centralized system architecture, smart buildings face challenges such as limited adaptability and robustness, single application functionalities, and complex configurations. To address the above shortcomings, we learn from the activity patterns of natural bee swarms and propose Honeycomb, an open-source smart-building solution with fully distributed architecture. Honeycomb is a robust, flexible smart-building solution without any central server or global leader. An asynchronous leaderless spanning tree-based communication pattern is developed to generate and maintain the communication topology of Honeycomb in real time. Benefiting from this communication pattern, Honeycomb has plug-and-play ability. Various distributed applications are designed for building operating tasks and are deployed in a real Honeycomb prototype. The prototype demonstrates significant energy efficiency improvement from the control of the heating, ventilation, and air conditioning (HVAC) system with video-based occupancy information. Feedback on our Honeycomb prototype through questionnaires of users shows high acceptance of the controlled indoor environment.

Face à la nécessité de réaliser des économies d'énergie, le centre aquatique du Provinois, à Provins, a adapté son fonctionnement.

Avec le déploiement de la smart city une révolution technologique est en marche. La mise en place des systèmes domotiques offre des avantages indéniables,... | 17 octobre 2022

Highlights • Analysis and comparison of present energy conservation approaches. • Investigation of energy conservation attributes employed in numerous techniques. • Identification of performance parameters of energy-saving methods. • Investigation of various evaluation metrics used to validate several energy optimization algorithms. • Recognition of possible future research directions. Abstract Smart homes are equipped with easy-to-interact interfaces, providing a more comfortable living environment and less energy consumption. There are currently satisfactory approaches proposed to deliver adequate comfort and ease to smart home inhabitants through infrared sensors, motion sensors, and other similar technologies. However, the goal of reducing energy consumption is always a significant concern for smart home stakeholders. A detailed discussion about energy management techniques might open new leads for advanced research and even introduce more ways to improve existing methods since a summary of effective energy conservation techniques are helpful to get a quick overview of the state-of-the-art techniques. This review study aims to provide an overview of previously proposed techniques for energy conservation and energy-saving recommendations. We identify various critical features in energy conservation techniques, i.e., user energy profiling, appliance energy profiling, and off-peak load scheduling to perform a comparative analysis among different techniques. Then, we explain various energy conservation techniques, describe common and rare evaluation metrics, identify several techniques for realizing synthetic smart home energy consumption datasets, and provide a statistical analysis of the existing literature. The survey finally points out possible research directions which might lead to new inquiries in energy conservation research.

Homnicity, promoteur immobilier spécialisé dans la conception et la gestion de résidences pour seniors, opte pour un réseau Wi-Fi 6 multiservices piloté à distance et doté de fonctions utilisant l'intelligence artificielle (IA).

Matter 1.0 arrive bientôt ! Le consortium à l'origine de la norme Matter pour l'internet des objets a officiellement approuvé la norme Cet article Matter 1.0 – La norme pour l'internet des objets et la certification sont prêtes pour les développeurs est apparu en premier sur Le Blog Domotique .

/PRNewswire/ -- Amphenol Communications Solutions is pleased to announce today the release of more options in its FLH series of mini sealed 2.50mm pitch IP67...

[...] A l'occasion du salon Light&Building de Francfort, l'entreprise française, Netatmo, spécialisée dans les objets connectés, a présenté un capteur de qualité de l'air intelligent dédié aux collectivités. Pour répondre aux problématiques sanitaires induites par le [...]

[...] Kardham Digital, première Entreprise de Services Numériques dédiée à l'industrie immobilière filiale du groupe d'immobilier professionnel Kardham et Schneider Electric, leader de la transformation numérique de la gestion d'énergie et des automatismes, s'associen [...]

Face à la nécessité de réaliser des économies d'énergie, le centre aquatique du Provinois, à Provins, a adapté son fonctionnement.

Avec le déploiement de la smart city une révolution technologique est en marche. La mise en place des systèmes domotiques offre des avantages indéniables,... | 17 octobre 2022

Homnicity, promoteur immobilier spécialisé dans la conception et la gestion de résidences pour seniors, opte pour un réseau Wi-Fi 6 multiservices piloté à distance et doté de fonctions utilisant l'intelligence artificielle (IA).

Matter 1.0 arrive bientôt ! Le consortium à l'origine de la norme Matter pour l'internet des objets a officiellement approuvé la norme Cet article Matter 1.0 – La norme pour l'internet des objets et la certification sont prêtes pour les développeurs est apparu en premier sur Le Blog Domotique .

/PRNewswire/ -- Amphenol Communications Solutions is pleased to announce today the release of more options in its FLH series of mini sealed 2.50mm pitch IP67...

[...] A l'occasion du salon Light&Building de Francfort, l'entreprise française, Netatmo, spécialisée dans les objets connectés, a présenté un capteur de qualité de l'air intelligent dédié aux collectivités. Pour répondre aux problématiques sanitaires induites par le [...]

[...] Kardham Digital, première Entreprise de Services Numériques dédiée à l'industrie immobilière filiale du groupe d'immobilier professionnel Kardham et Schneider Electric, leader de la transformation numérique de la gestion d'énergie et des automatismes, s'associen [...]

Abstract The reuse and integration of data give big opportunities, supported by the FAIR data principles. Seamless data integration from heterogenous sources has been an interest of the geospatial community for a long time. However, 3D city models, building information models, and information supporting smart cities present higher semantic and geometrical complexity, which pose new challenges never tackled in a comprehensive methodology. Building on previous theories and studies, this article proposes an overarching workflow and framework for multisource (geo)spatial data integration. It starts from the definition of use case‐based requirements for the integrated data, guides the analysis of integrability of the involved datasets, suggesting actions to harmonize them, until data merging and validation. It is finally tested and exemplified in a case study. This approach allows the development of consistent, well‐documented, and inclusive data integration workflows, for the sake of use case automation in various geospatial domains and the production of interoperable and reusable data.

Abstract The emerging moisture‐driven energy generation (MEG) technology opens up new possibilities for humidity‐responsive materials, devices and interdisciplinary opportunities in fields like information security. However, such potential remains untapped. Here, we report an original MEG structure with a hygro‐ionic energy‐conversion route by selective coating of ionic hygroscopic hydrogels on a carbon black surface. The hygro‐ionic route features a process in which the scavenged energy is stored in the electrical double layers formed at the interfaces between the ionic hydrogel and the carbon nanoparticles. The resultant electrical field developed across the hydrogel‐coated wet carbon and the rest dry carbon area is thus durably lasted. Based on this unique structure, we put forward the hygro‐electronic information interfaces (HEII) for humidity‐regulated information encryption and display by devising the hydrogel patterns on the carbon platform. Further by tuning the hygroscopicity of ionic hydrogels and incorporating encoding methods (e.g., Morse code), we demonstrate that the HEII platform is programmable to carry different information in certain humidity ranges. Unlike those conventional anticounterfeiting methods that optically reveal the hidden information once the required stimulus is provided, the new HEII serves as a hierarchical solution for high‐security encryption and display. This article is protected by copyright. All rights reserved

This review analyzes the latest advances in thermoelectric nanogenerator (TENG) materials, design and fabrication for common and promising applications, including wearable electronics, sensors, implantable electronics, solar energy conversion and waste heat recovery. Unlike other earlier reviews, this manuscript focuses on how cutting‐edge nanotechnology has been used to maximize thermoelectric power output and enable the design of flexible and lightweight devices. Abstract Thermoelectric nanogenerators (TENGs) are promising sustainable energy devices that utilize thermoelectric (TE) effect of nanomaterials to convert a temperature gradient into electrical energy. Compared to bulk thermoelectric generators (TEGs) that are commercially available, TENGs are more flexible and power‐dense, owing to their tuneable nanostructures. Hence, smaller TENGs are better suited for small form‐factor applications like wearable electronics, internet of things (IoT) devices, and self‐powered sensors. However, the higher complexity and cost of TENGs than TEGs inhibit their widespread adoption. This review appraises the latest advances in TENG materials, design, and fabrication in optimizing the performance of TENGs, making TENGs more viable for real‐world applications. More precisely, this work examines how nanostructure engineering, nanomaterial compositing, and post‐synthesis treatment approaches have enhanced the TE properties of common and promising TE materials, including tellurides, selenides, metal oxides, metal alloys, silicon, carbon nanomaterials, and organic compounds. Given that the TE material is a key component in TENGs, this review highlights how to optimize other vital parameters, including the TENG configuration, contact interface, form factor, heat sink use, and folded shape for specific applications. Lastly, critical attributes of TENGs used in wearable electronics, sensors, implantable electronics, solar energy conversion, and waste heat recovery are analyzed.

Ionogels are an emerging class of hybrid materials endowed with outstanding thermal, electrical, and mechanical properties. This material system\'s high versatility and superior tunability attract significant interest among researchers encompassing a broad spectrum of applications, including energy, flexible electronics, and biomedical. This review paper focuses on exploring the interactions within ionogels and their influence on electrochemical and mechanical performance. Abstract Ionogels have established themselves as an intriguing type of composites, owing to their distinctive properties, including superior thermal stability, non‐flammability, tunable electrochemical stability window, and high ionic conductivity. Hybrid materials based on ionic liquids (ionogels) are held together by interfaces arising out of intermolecular interactions, including electrostatic, van der Waals, solvophobic, steric, and hydrogen bonding. The interfaces within the ionic liquid (ILs) and its multifaceted interplay with the encapsulating matrix greatly influence the physicochemical and electronic/ionic interactions within the composite resulting in exceptional characteristics, allowing for the design of ionogels for targeted applications. Though ionogels have shown superior properties comparable to neat ILs, they still exhibit relatively low mechanical strength, limiting their application in several practical technologies. Simultaneous enhancement of mechanical durability while retaining high ionic conductivity is indispensable, which requires understanding interfaces and related influencing parameters. This review provides a synergetic comprehension, focusing on the interactive forces and factors affecting the conductivity, stability, and robustness of ionogels. Correlating with interfaces, several strategies, including the implications of nanofiller incorporation on the electromechanical properties of ionogel, are also elaborated. Finally, a primer is provided on the application of ionogels in sensors and energy harvesting technologies.

Abstract The communication channel between the smart home devices and the remote users is susceptible to numerous privacy and security compromise attacks. To address these issues, many authentication protocols have been developed. However, majority of these security schemes have vulnerabilities that may still be exploited to wreck havoc in smart homes. For instance, protocols based on low entropy passwords can be broken by polynomial time adversaries. Apart from security and privacy challenges, efficiency of the entire authentication process is another challenge that needs to be solved. To this end, most of the conventional smart home authentication protocols incur extensive storage, computation as well as communication overheads which are unsuitable for resource limited smart home devices. In this paper, an anonymous lightweight protocol is developed, based on one-way hashing and elliptic curve point multiplication operations. Formal verification of this protocol is executed using ProVerif while its informal security analysis demonstrates its robustness against majority of the smart home privacy and security attacks. In terms of operational efficiency, comparative analysis is carried out which shows that it incurs relatively low computation, storage and communication overheads.

Highlights • A bee-inspired, fully distributed, and open-source building IoT solution • Strong flexibility and robustness, multiple functionalities, and easy deployment • Proposed vision-based deep-learning occupancy measurement with superior performance • High user acceptance during long-term stable operation The bigger picture Due to the complex and changing needs of building systems, existing building automation technologies are generally challenging to deploy, with poor robustness and high energy consumption. Inspired by bee swarms, we propose Honeycomb, an open-source system that combines distributed technologies with smart buildings to fill this gap. Like a honeycomb in nature, we see the whole building as interconnected “cells,” smart nodes deployed in blocks as “bees,” and distributed applications as “genes.” Honeycomb exhibits advancements compared with state-of-the-art smart building solutions: (1) robustness and flexibility to complex cases; (2) multi-functionality for operating tasks and energy saving; (3) easy deployment and compatibility to existing building systems; and (4) deep-learning perception is integrated with building control. Operating results have shown that Honeycomb significantly reduces the energy consumption of equipment, while users indicate a high level of acceptance in practice. Summary Restricted by the hierarchical and centralized system architecture, smart buildings face challenges such as limited adaptability and robustness, single application functionalities, and complex configurations. To address the above shortcomings, we learn from the activity patterns of natural bee swarms and propose Honeycomb, an open-source smart-building solution with fully distributed architecture. Honeycomb is a robust, flexible smart-building solution without any central server or global leader. An asynchronous leaderless spanning tree-based communication pattern is developed to generate and maintain the communication topology of Honeycomb in real time. Benefiting from this communication pattern, Honeycomb has plug-and-play ability. Various distributed applications are designed for building operating tasks and are deployed in a real Honeycomb prototype. The prototype demonstrates significant energy efficiency improvement from the control of the heating, ventilation, and air conditioning (HVAC) system with video-based occupancy information. Feedback on our Honeycomb prototype through questionnaires of users shows high acceptance of the controlled indoor environment.

Highlights • Analysis and comparison of present energy conservation approaches. • Investigation of energy conservation attributes employed in numerous techniques. • Identification of performance parameters of energy-saving methods. • Investigation of various evaluation metrics used to validate several energy optimization algorithms. • Recognition of possible future research directions. Abstract Smart homes are equipped with easy-to-interact interfaces, providing a more comfortable living environment and less energy consumption. There are currently satisfactory approaches proposed to deliver adequate comfort and ease to smart home inhabitants through infrared sensors, motion sensors, and other similar technologies. However, the goal of reducing energy consumption is always a significant concern for smart home stakeholders. A detailed discussion about energy management techniques might open new leads for advanced research and even introduce more ways to improve existing methods since a summary of effective energy conservation techniques are helpful to get a quick overview of the state-of-the-art techniques. This review study aims to provide an overview of previously proposed techniques for energy conservation and energy-saving recommendations. We identify various critical features in energy conservation techniques, i.e., user energy profiling, appliance energy profiling, and off-peak load scheduling to perform a comparative analysis among different techniques. Then, we explain various energy conservation techniques, describe common and rare evaluation metrics, identify several techniques for realizing synthetic smart home energy consumption datasets, and provide a statistical analysis of the existing literature. The survey finally points out possible research directions which might lead to new inquiries in energy conservation research.

Various arrangements for using captured voice to generate a custom interface controller are presented. A vocal recording from a user may be captured in which a spoken command and multiple smart-home devices are indicated. One or more common functions that map to the multiple smart-home devices may be determined. A custom interface controller may be generated that controls the one or more common functions of each smart-home device of the multiple smart-home devices.

The present invention relates to the technical field of smart home, and specifically relates to a control method for a smart clothes treatment system, aiming at solving the problem that an existing linkage method is more suitable for being applied to a system of associated home appliances that work according to the same operating parameters and the linkage mobility and the degree of intelligence are not good. The control method of the smart clothes treatment system can automatically recommend care parameter information of a clothes care device according to washing parameter information of a clothes washing device, so that the clothes care device can directly operate on the basis of the recommended care parameter information. The control method can be appliable to a combination of linkage home appliances having different types of operating parameters such as the clothes washing device and the clothes care device, so that multiple home appliances having a large difference in operating parameters can perform linkage operation on the basis of a specific matching scenario, improving the linkage mobility and degree of intelligence of the entire linkage system, saving the parameter generation and processing time of the associated home appliances, and improving the data processing efficiency of the associated home appliances.

The disclosed invention includes a dwelling fixture. The dwelling fixture includes a compartment configured to contain packages delivered to the dwelling, an interior door to access the compartment from the interior of the dwelling, and an exterior door to access the compartment from the exterior of the dwelling. The interior door and/or exterior door includes a locking mechanism to secure the compartment. The dwelling fixture is easily and securely installable through the walls of the dwelling. The exterior door is flush with the exterior of the dwelling and aesthetically integrated with trim that adapts to any exterior finish.

Disclosed in the present invention are a household appliance control method and device. In the control method, an operation process of a household appliance is divided into multiple operation stages according to the execution order; a control module reads an instruction from an NFC tag; the control module deletes an instruction stored in the NFC tag; the control module obtains a next instruction, the next instruction being an instruction corresponding to a next operation stage of an operation stage of the household appliance corresponding to the instruction read by the control module from the NFC tag; and the control module writes the obtained next instruction into the NFC tag. In the present invention, after an instruction in the NFC tag is read, an instruction in the NFC tag is deleted, the next instruction is written into the NFC tag, and a user touches a same NFC tag for multiple times to allow the household appliance to execute multiple instructions according to the execution order, thereby completing the complete control of the household appliance, and facilitating the use of the user.

The present application relates to the technical field of intelligent air conditioners, and discloses a method, apparatus, and system for environment control in a smart home system, and a device. The smart home system comprises: a cloud control device and one or more home environment adjusting devices communicationally connected to the cloud control device. The method comprises: when it is determined that a user in a home environment is in a falling-asleep state, sending a falling-asleep control instruction to the home environment adjusting devices, such that the home environment is in a preset falling-asleep scenario; when it is determined that the user is in a sleeping state, sending a sleeping control instruction to the home environment adjusting devices, such that the home environment is in a preset sleeping scenario; and when it is determined that the user is in an awakening state, sending an awakening control instruction to the home environment adjusting devices, such that the home environment is in a preset awakening scenario. In this way, the smart scenario of the sleep environment is realized, and the home intelligence is improved.

The invention discloses a discharging method and discharging agent for recycling waste batteries. Waste batteries are immersed with coke powder to form a discharging circuit and to remove the residual power off the waste batteries before destruction of the batteries. The discharging performance varies with resistivity of the coke powder, and can be measured by watching the temperature and/or the temperature change trend. The resistivity depends on the ratio of carbon composition of the coke powder and the contact quality between the coke powder and the waste batteries, and the pressure on coke powder can adjust the contact quality. Therefore, the method is able to adjust the discharging performance by adjusting the pressure to meet the discharging requirements of efficiency and safety.

A characteristic, such as State Of Health (SOH) or State Of Charge (SOC), is estimated for an Energy Storage System (ESS) by supplying a pre-determined signal to the ESS, measuring a response signal output by the ESS, and obtaining an impedance spectrum of the ESS. In one example, the ESS is one of several electrochemical battery packs of an electric vehicle. The pre-determined signal is a current signal generated by a switching power converter that transfers charge from the battery pack to other battery packs or transfers charge from the other battery packs onto the battery pack. The pre-determined signal is generated without disrupting any load supplied by the battery packs. The battery pack outputs a voltage signal in response to receiving the pre-determined current signal. A processor obtains an impedance spectrum using the current and voltage signals, and thereby obtains an SOH and SOC estimate of the battery.

As electric vehicles (EVs) are quickly evolving, innovative technologies like “Energized Composite” that can store energy on the car\’s body helps extend its range per charge. The composite\’s unique ability to function as both structural body panel and charge storage medium stems from its unique pattern design between “Electrochemical Areas (EcA)” and “Epoxy Area (EpA).” Here we present a design optimization study to obtain a balanced ratio between EcA vs. EpA to maximize the charge storage ability of the composite while maintaining a decent tensile and bending strength. Simulations using ANSYS software and experimental confirmation using universal testing machines and electrochemical analyzers are used to derive optimum ratios between EcA and EpA. Uniaxial tension test and 3‐point bend test have been performed to optimize the tensile and bend strengths, whereas cyclic voltammetry, galvanic charge‐discharge and electrochemical impedance spectroscopy are used to determine the electrochemical performance of various design configurations by modulating the ratios of EcA vs. EpA. Overall, the highest achieved energy storage per lamina is 2531 mWh/m2 for a maximum of 81.6% EcA with a tensile strength of 417.73 MPa and bending strength of 263.13 MPa. This study is highly beneficial for EVs as well as many aerospace applications. This article is protected by copyright. All rights reserved.

Recycling of Power Lithium-Ion Batteries

Explore the past, present, and future of power lithium-ion battery recycling, from the governing regulatory framework to predictions of the future of the industry

In Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies, a team of distinguished researchers and engineers delivers an authoritative and illuminating exploration of the industrial status and development trends in the global power lithium-ion battery sector. The book examines the development of advanced battery materials and new recycling technologies, as well as typical case studies in enterprise battery recycling. The authors provide a roadmap to the development of spent power battery recycling enterprises that can provide support to the sustainable development industry.

Recycling of Power Lithium-Ion Batteries discusses a wide variety of topics with immediate applications to modern industry, including new application scenarios for power lithium-ion batteries, as well as an examination of the laws, regulations, and standards governing battery recycling.

Readers will also find:

• A thorough introduction to the status and development of the lithium-ion battery and its key materials
• Fulsome discussions of battery recycling technologies and equipment, including pre-treatment technology for battery recycling
• Comprehensive explorations of the life cycle of power lithium-ion batteries and the impact of battery recycling
• Expansive treatments of the technology outlook in the lithium-ion battery space, including green battery design and recovery systems

Perfect for materials scientists, environmental chemists, and power technology engineers, Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies will also earn a place in the libraries of chemical and process engineers, electrochemists, and professionals working at waste disposal sites.Recycling of Power Lithium-Ion Batteries

Explore the past, present, and future of power lithium-ion battery recycling, from the governing regulatory framework to predictions of the future of the industry

In Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies, a team of distinguished researchers and engineers delivers an authoritative and illuminating exploration of the industrial status and development trends in the global power lithium-ion battery sector. The book examines the development of advanced battery materials and new recycling technologies, as well as typical case studies in enterprise battery recycling. The authors provide a roadmap to the development of spent power battery recycling enterprises that can provide support to the sustainable development industry.

Recycling of Power Lithium-Ion Batteries discusses a wide variety of topics with immediate applications to modern industry, including new application scenarios for power lithium-ion batteries, as well as an examination of the laws, regulations, and standards governing battery recycling.

Readers will also find:

• A thorough introduction to the status and development of the lithium-ion battery and its key materials
• Fulsome discussions of battery recycling technologies and equipment, including pre-treatment technology for battery recycling
• Comprehensive explorations of the life cycle of power lithium-ion batteries and the impact of battery recycling
• Expansive treatments of the technology outlook in the lithium-ion battery space, including green battery design and recovery systems

Perfect for materials scientists, environmental chemists, and power technology engineers, Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies will also earn a place in the libraries of chemical and process engineers, electrochemists, and professionals working at waste disposal sites. Summary This chapter predominantly introduces the flow sheet and research status of spent battery recycling and the typical equipment to realize the recycling processes. Battery recycling processes include pretreatment, hydrometallurgy, pyrometallurgy, material repair, and regeneration. The current status of spent power battery recycling technology is analyzed to compare the characteristics and differences of different technologies. Meanwhile, the advantages and existing problems of current recycling technology are analyzed, and the development trend of the technology is forecasted. Finally, this chapter further examines recycling processing and equipment development and draws a development road map for the spent power battery recycling field.

7.7 Robust ...avoiding over-reliance on a single asset where cascading failure and design thresholds can lead to catastrophic collapse; d) having intentional, cost-effective, diverse prioritized redundancies... 8.2.2 Commitment to enhancing resilience ...strategy design framework should be based on the monitoring and reviewing of results, and lead to improvements in the resilience culture. The organization should communicate its commitment to...

[...] Jusqu'à présent, le constructeur chinois BYD réservait ses batteries LFP à lames pour ses voitures particulières électriques. Leur adoption dans les autobus est une véritable révolution.Une foule d'avantages C'est dans le cadre du salon des véhicules commerciau [...]

Even if until now electric vehicles are not 100% clean, they are becoming an increasingly viable alternative to classic transport solutions, bringing in addition new innovations designed to help within the general concept of sustainable development, especially within large urban areas. In addition to the classic transport function, through new technologies (V2V, V2G), an electric vehicle can be successfully transformed into an active tool in achieving the goals of a Smart City. This paper presents several alternatives both as an effective part of control hardware for an electric vehicle and algorithms implemented on this hardware. The special characteristics that can be implemented in an electric vehicle are highlighted by presenting the achievements of such vehicles. The original note is the conversion of a vintage off-road vehicle from Romania into an electric vehicle. It is noteworthy that many of the hardware components used in the construction of various electric vehicles are recycled so it can be said that the first step in terms of the concept of sustainable development has already been achieved. All electric vehicles designed or converted at the University of Petrosani benefit from LoRa type communications (a communication network still little used in Romania but which has proven its reliability) and are intended for use inside an urban area and can successfully fulfil the role of the platform for monitoring the air quality parameters in a certain area precisely in view of the fact that it does not pollute directly.

The present invention comprises: a first drive source (an internal combustion engine (2) and a first motor generator (3)); a second drive source (a second motor generator (4)); a first clutch (9); and a second clutch (12). In a neutral mode, the first and second clutches (9, 12) are in a disengaged state, and a third motor generator (16) drives the rear wheels (15) using the electricity generated by the first motor generator (3). In a parallel mode, the first and second clutches (9, 12) are in an engaged state, and the first and second drive sources drive the front wheels (1), while the third motor generator 16 drives the rear wheels (15). In the case where there is sufficient battery power when switching from the neutral mode to the parallel mode, synchronization controls are simultaneously performed for the front and rear rotation speeds of the two clutches (9, 12). In the case where the battery power is insufficient, the two synchronization controls are performed sequentially.

A mobile platform that is equipped to charge an electrical vehicle and supply liquid fuel to an internal combustion engine vehicle. The mobile platform includes a chassis configured to be pulled by a tow vehicle. A battery bank is positioned on the chassis. A renewable energy recharging device and a liquid fuel powered recharging device are each positioned on the chassis to recharge the battery bank. An electrical terminal is operatively connected to the battery bank to deliver electric power from the battery bank to an electric vehicle. A fuel tank is positioned on the chassis to store liquid fuel and a fuel line extends from the fuel tank to deliver the liquid fuel to an internal combustion engine vehicle.

Highlights • A novel PEM fuel cell-battery integration is proposed for a hydrogen vehicle. • Heat generation in lithium ion battery is recovered by preheating fuel cell air. • The applicability and compatibility of the proposed system are investigated. • A parametric study is performed for the integration in hydrogen electric vehicle. Abstract A novel integration of a proton exchange membrane (PEM) fuel cell with lithium ion batteries is presented for a hydrogen electric vehicle. The performance of the PEM fuel cell is affected by the temperature of input air that is drawn from the environment for electrochemical reaction with the hydrogen. Preheating the input air before it enters the PEM fuel cell can potentially improve its performance, especially during cold weather conditions. In addition, removing the heat generated in the lithium ion battery cells is necessary for efficient, safe and long-term operation of the hydrogen electric vehicle. In this context, this study introduces an air-cooled battery thermal management system in which the air is taken from the environment, preheated through cooling of batteries and then used in the PEM fuel cell stack. Both the PEM fuel cell and the lithium ion battery systems are analyzed to investigate the compatibility and applicability of the proposed system. Also, the PEM fuel cell electrical power output and energy efficiency are assessed through varying the operating conditions. It is found that, at a current density of 0.4 A/cm2, the energy efficiency of the PEM fuel cell improves from 45\% to 48\% by preheating the air from 10 to 40 . Furthermore, during discharge of the lithium ion battery, the cooling air removes an average heat generation rate of 3.5 W per unit area of the lithium ion battery to maintain the battery temperature at around 25 .

Premiere ride: Siemens and Deutsche Bahn test hydrogen train and mobile fueling station for first time. Premiere ride in the new hydrogen

Lhyfe secures deal with Plug to provide 50mw of PEM electrolyzers for renewable green hydrogen production. Lhyfe a pure player in renewable

VANCOUVER, BC and HYDERABAD, India , Sept. 6, 2022 /CNW/ - Ballard Power Systems (NASDAQ:BLDP) (TSX:BLDP) today announced a fuel cell module order from Medha Servo Drives, a leading rail system integrator, who has been

4 Origin of fan system effects ...obstacles at fan inlets and outlets that alter the aerodynamic characteristics of the fan and lead to deficient performance in relation to catalogue ratings, even when the system pressure losses... 8.4 Examples of the effects of poor inlet and outlet connections ...on the fan outlet. No account was taken of this when specifying the fan which led to a shortfall in air performance at the commissioning stage. Some modifications were made...

La présente norme spécifie l’ensemble de base des objectifs clés des participants pour la série de normes relatives à la connectivité des dispositifs orientés services (SDC). Les objectifs clés des participants sont des ensembles d’exigences basés sur les rôles pour les produits afin de favoriser une interopérabilité sûre, efficace et sécurisée dans les réseaux TI médicaux sur les sites des soins tels que l’unité de soins intensifs (USI), la salle d’opération (OR) ou d’autres environnements de soins aigus. La présente norme spécifie à la fois le processus de développement du produit et les exigences techniques.

[...] Jusqu'à présent, le constructeur chinois BYD réservait ses batteries LFP à lames pour ses voitures particulières électriques. Leur adoption dans les autobus est une véritable révolution.Une foule d'avantages C'est dans le cadre du salon des véhicules commerciau [...]

Premiere ride: Siemens and Deutsche Bahn test hydrogen train and mobile fueling station for first time. Premiere ride in the new hydrogen

Lhyfe secures deal with Plug to provide 50mw of PEM electrolyzers for renewable green hydrogen production. Lhyfe a pure player in renewable

VANCOUVER, BC and HYDERABAD, India , Sept. 6, 2022 /CNW/ - Ballard Power Systems (NASDAQ:BLDP) (TSX:BLDP) today announced a fuel cell module order from Medha Servo Drives, a leading rail system integrator, who has been

7.7 Robust ...avoiding over-reliance on a single asset where cascading failure and design thresholds can lead to catastrophic collapse; d) having intentional, cost-effective, diverse prioritized redundancies... 8.2.2 Commitment to enhancing resilience ...strategy design framework should be based on the monitoring and reviewing of results, and lead to improvements in the resilience culture. The organization should communicate its commitment to...

4 Origin of fan system effects ...obstacles at fan inlets and outlets that alter the aerodynamic characteristics of the fan and lead to deficient performance in relation to catalogue ratings, even when the system pressure losses... 8.4 Examples of the effects of poor inlet and outlet connections ...on the fan outlet. No account was taken of this when specifying the fan which led to a shortfall in air performance at the commissioning stage. Some modifications were made...

La présente norme spécifie l’ensemble de base des objectifs clés des participants pour la série de normes relatives à la connectivité des dispositifs orientés services (SDC). Les objectifs clés des participants sont des ensembles d’exigences basés sur les rôles pour les produits afin de favoriser une interopérabilité sûre, efficace et sécurisée dans les réseaux TI médicaux sur les sites des soins tels que l’unité de soins intensifs (USI), la salle d’opération (OR) ou d’autres environnements de soins aigus. La présente norme spécifie à la fois le processus de développement du produit et les exigences techniques.

As electric vehicles (EVs) are quickly evolving, innovative technologies like “Energized Composite” that can store energy on the car\’s body helps extend its range per charge. The composite\’s unique ability to function as both structural body panel and charge storage medium stems from its unique pattern design between “Electrochemical Areas (EcA)” and “Epoxy Area (EpA).” Here we present a design optimization study to obtain a balanced ratio between EcA vs. EpA to maximize the charge storage ability of the composite while maintaining a decent tensile and bending strength. Simulations using ANSYS software and experimental confirmation using universal testing machines and electrochemical analyzers are used to derive optimum ratios between EcA and EpA. Uniaxial tension test and 3‐point bend test have been performed to optimize the tensile and bend strengths, whereas cyclic voltammetry, galvanic charge‐discharge and electrochemical impedance spectroscopy are used to determine the electrochemical performance of various design configurations by modulating the ratios of EcA vs. EpA. Overall, the highest achieved energy storage per lamina is 2531 mWh/m2 for a maximum of 81.6% EcA with a tensile strength of 417.73 MPa and bending strength of 263.13 MPa. This study is highly beneficial for EVs as well as many aerospace applications. This article is protected by copyright. All rights reserved.

Recycling of Power Lithium-Ion Batteries

Explore the past, present, and future of power lithium-ion battery recycling, from the governing regulatory framework to predictions of the future of the industry

In Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies, a team of distinguished researchers and engineers delivers an authoritative and illuminating exploration of the industrial status and development trends in the global power lithium-ion battery sector. The book examines the development of advanced battery materials and new recycling technologies, as well as typical case studies in enterprise battery recycling. The authors provide a roadmap to the development of spent power battery recycling enterprises that can provide support to the sustainable development industry.

Recycling of Power Lithium-Ion Batteries discusses a wide variety of topics with immediate applications to modern industry, including new application scenarios for power lithium-ion batteries, as well as an examination of the laws, regulations, and standards governing battery recycling.

Readers will also find:

• A thorough introduction to the status and development of the lithium-ion battery and its key materials
• Fulsome discussions of battery recycling technologies and equipment, including pre-treatment technology for battery recycling
• Comprehensive explorations of the life cycle of power lithium-ion batteries and the impact of battery recycling
• Expansive treatments of the technology outlook in the lithium-ion battery space, including green battery design and recovery systems

Perfect for materials scientists, environmental chemists, and power technology engineers, Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies will also earn a place in the libraries of chemical and process engineers, electrochemists, and professionals working at waste disposal sites.Recycling of Power Lithium-Ion Batteries

Explore the past, present, and future of power lithium-ion battery recycling, from the governing regulatory framework to predictions of the future of the industry

In Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies, a team of distinguished researchers and engineers delivers an authoritative and illuminating exploration of the industrial status and development trends in the global power lithium-ion battery sector. The book examines the development of advanced battery materials and new recycling technologies, as well as typical case studies in enterprise battery recycling. The authors provide a roadmap to the development of spent power battery recycling enterprises that can provide support to the sustainable development industry.

Recycling of Power Lithium-Ion Batteries discusses a wide variety of topics with immediate applications to modern industry, including new application scenarios for power lithium-ion batteries, as well as an examination of the laws, regulations, and standards governing battery recycling.

Readers will also find:

• A thorough introduction to the status and development of the lithium-ion battery and its key materials
• Fulsome discussions of battery recycling technologies and equipment, including pre-treatment technology for battery recycling
• Comprehensive explorations of the life cycle of power lithium-ion batteries and the impact of battery recycling
• Expansive treatments of the technology outlook in the lithium-ion battery space, including green battery design and recovery systems

Perfect for materials scientists, environmental chemists, and power technology engineers, Recycling of Power Lithium-Ion Batteries: Technology, Equipment, and Policies will also earn a place in the libraries of chemical and process engineers, electrochemists, and professionals working at waste disposal sites. Summary This chapter predominantly introduces the flow sheet and research status of spent battery recycling and the typical equipment to realize the recycling processes. Battery recycling processes include pretreatment, hydrometallurgy, pyrometallurgy, material repair, and regeneration. The current status of spent power battery recycling technology is analyzed to compare the characteristics and differences of different technologies. Meanwhile, the advantages and existing problems of current recycling technology are analyzed, and the development trend of the technology is forecasted. Finally, this chapter further examines recycling processing and equipment development and draws a development road map for the spent power battery recycling field.

Even if until now electric vehicles are not 100% clean, they are becoming an increasingly viable alternative to classic transport solutions, bringing in addition new innovations designed to help within the general concept of sustainable development, especially within large urban areas. In addition to the classic transport function, through new technologies (V2V, V2G), an electric vehicle can be successfully transformed into an active tool in achieving the goals of a Smart City. This paper presents several alternatives both as an effective part of control hardware for an electric vehicle and algorithms implemented on this hardware. The special characteristics that can be implemented in an electric vehicle are highlighted by presenting the achievements of such vehicles. The original note is the conversion of a vintage off-road vehicle from Romania into an electric vehicle. It is noteworthy that many of the hardware components used in the construction of various electric vehicles are recycled so it can be said that the first step in terms of the concept of sustainable development has already been achieved. All electric vehicles designed or converted at the University of Petrosani benefit from LoRa type communications (a communication network still little used in Romania but which has proven its reliability) and are intended for use inside an urban area and can successfully fulfil the role of the platform for monitoring the air quality parameters in a certain area precisely in view of the fact that it does not pollute directly.

Highlights • A novel PEM fuel cell-battery integration is proposed for a hydrogen vehicle. • Heat generation in lithium ion battery is recovered by preheating fuel cell air. • The applicability and compatibility of the proposed system are investigated. • A parametric study is performed for the integration in hydrogen electric vehicle. Abstract A novel integration of a proton exchange membrane (PEM) fuel cell with lithium ion batteries is presented for a hydrogen electric vehicle. The performance of the PEM fuel cell is affected by the temperature of input air that is drawn from the environment for electrochemical reaction with the hydrogen. Preheating the input air before it enters the PEM fuel cell can potentially improve its performance, especially during cold weather conditions. In addition, removing the heat generated in the lithium ion battery cells is necessary for efficient, safe and long-term operation of the hydrogen electric vehicle. In this context, this study introduces an air-cooled battery thermal management system in which the air is taken from the environment, preheated through cooling of batteries and then used in the PEM fuel cell stack. Both the PEM fuel cell and the lithium ion battery systems are analyzed to investigate the compatibility and applicability of the proposed system. Also, the PEM fuel cell electrical power output and energy efficiency are assessed through varying the operating conditions. It is found that, at a current density of 0.4 A/cm2, the energy efficiency of the PEM fuel cell improves from 45\% to 48\% by preheating the air from 10 to 40 . Furthermore, during discharge of the lithium ion battery, the cooling air removes an average heat generation rate of 3.5 W per unit area of the lithium ion battery to maintain the battery temperature at around 25 .

The invention discloses a discharging method and discharging agent for recycling waste batteries. Waste batteries are immersed with coke powder to form a discharging circuit and to remove the residual power off the waste batteries before destruction of the batteries. The discharging performance varies with resistivity of the coke powder, and can be measured by watching the temperature and/or the temperature change trend. The resistivity depends on the ratio of carbon composition of the coke powder and the contact quality between the coke powder and the waste batteries, and the pressure on coke powder can adjust the contact quality. Therefore, the method is able to adjust the discharging performance by adjusting the pressure to meet the discharging requirements of efficiency and safety.

A characteristic, such as State Of Health (SOH) or State Of Charge (SOC), is estimated for an Energy Storage System (ESS) by supplying a pre-determined signal to the ESS, measuring a response signal output by the ESS, and obtaining an impedance spectrum of the ESS. In one example, the ESS is one of several electrochemical battery packs of an electric vehicle. The pre-determined signal is a current signal generated by a switching power converter that transfers charge from the battery pack to other battery packs or transfers charge from the other battery packs onto the battery pack. The pre-determined signal is generated without disrupting any load supplied by the battery packs. The battery pack outputs a voltage signal in response to receiving the pre-determined current signal. A processor obtains an impedance spectrum using the current and voltage signals, and thereby obtains an SOH and SOC estimate of the battery.

The present invention comprises: a first drive source (an internal combustion engine (2) and a first motor generator (3)); a second drive source (a second motor generator (4)); a first clutch (9); and a second clutch (12). In a neutral mode, the first and second clutches (9, 12) are in a disengaged state, and a third motor generator (16) drives the rear wheels (15) using the electricity generated by the first motor generator (3). In a parallel mode, the first and second clutches (9, 12) are in an engaged state, and the first and second drive sources drive the front wheels (1), while the third motor generator 16 drives the rear wheels (15). In the case where there is sufficient battery power when switching from the neutral mode to the parallel mode, synchronization controls are simultaneously performed for the front and rear rotation speeds of the two clutches (9, 12). In the case where the battery power is insufficient, the two synchronization controls are performed sequentially.

A mobile platform that is equipped to charge an electrical vehicle and supply liquid fuel to an internal combustion engine vehicle. The mobile platform includes a chassis configured to be pulled by a tow vehicle. A battery bank is positioned on the chassis. A renewable energy recharging device and a liquid fuel powered recharging device are each positioned on the chassis to recharge the battery bank. An electrical terminal is operatively connected to the battery bank to deliver electric power from the battery bank to an electric vehicle. A fuel tank is positioned on the chassis to store liquid fuel and a fuel line extends from the fuel tank to deliver the liquid fuel to an internal combustion engine vehicle.

Abstract The comfort of the modern society is somehow relied on production of high voltage and high frequency devices. Being mature in performance, wide bandgap semiconductors have replaced silicon-based devices. However, wide bandgap semiconductor devices are plagued with their premature breakdown, which owes to edge effects. Present work demonstrates breakdown voltage enhancement in GaN based Schottky diode using trench edge termination technique. Al2O3 was filled in the trench of the structure. The atlas module of the Silvaco TCAD software has been used to replicate the device structure. Numerous models for ionization, recombination, impact ionization and mobility have been used. The breakdown voltage of the device is estimated to be 350 V due to the increase in the electric field at the edges. Using trench termination, the edge electric field crowding has been found spreading away from the edges of the device and in the Al2O3 layer. As a consequence, the trench edge terminated device has a reverse breakdown voltage increased to 1800 V.

[...] We recently conducted a roundtable with a team of printed electronic circuit experts from companies that run the gamut: John Lee and Kevin Miller of Insulectro, Mike Wagner of Butler Technologies, Tom Bianchi of Eastprint, and John Voultos of Sheldahl Flexibl [...]

A ceramic feedthrough assembly has a feedthrough interface sleeve brazed to a ceramic feedthrough body and a housing interface sleeve brazed to the feedthrough interface sleeve. The housing interface sleeve is configured to be integrated within an electronic device and welded to a metal housing to form a hermetically sealed electronic device. The ceramic feedthrough has at least one embedded electrical conductor extending from a first location on the ceramic feedthrough body to a second location on the ceramic feedthrough body. The feedthrough interface sleeve is positioned around the ceramic feedthrough body between the first location and the second location and brazed to the wrap-around metallization. When the metal housing is welded to the housing interface sleeve, the ceramic feedthrough assembly facilitates connection to an electronic circuit hermetically sealed in the electronic device with the metal housing.

The present invention relates to a new class of dielectric polymer material, which is particularly suitable for the manufacturing of electronic devices. The dielectric polymer material is formed by reacting bismaleimide compounds and shows an advantageous well-balanced profile of favorable material properties. The bismaleimide compounds have an oligomeric structure with an oligoamide extended repeating unit in the middle part of the molecule and maleimide groups at each terminal end of the molecule. There is further provided a method for forming said dielectric polymer material. Beyond that, the present invention relates to the dielectric polymer material and to an electronic device comprising the same.

Vous souvenez-vous des décalcomanies thermocollantes ? Tout ce que vous aviez […]

An electronic apparatus according to various embodiments comprises: a housing having a coupling region; and a printed circuit board that has an overlap region overlapping the coupling region and a non-overlap region not overlapping the coupling region. The printed circuit board includes a plurality of metal layers and a plurality of lines. The printed circuit board may include a void section in which a portion of at least one metal layer close to the coupling region among the plurality of metal layers is not formed.

A first electric power conversion device (10) can convert electric power which has been generated by a power generation device (4a) that uses renewable energy to generate electric power into AC power at a predetermined voltage, and output the AC power to a power reception point of an electric power system (2). A second electric power conversion device (20) comprises a control unit (25), an inverter (22), and a converter (21) capable of charging and discharging a power storage unit (5). During an interruption of power to the electric power system (2), an independent output pathway of the second electric power conversion device (20) is connected to an interconnection output pathway of the first electric power conversion device (10). When electric power input to the AC side of the inverter (22) has exceeded or is predicted to exceed the maximum chargeable power of the power storage unit (5), the control unit (25) performs control such that the output of the first electric power conversion device (10) is suppressed or blocked.

Everything you need to know about RF and Ceramic Capacitors Webinar takes a deep dive into what makes a radio frequency capacitor unique and the roles

A power conversion device (100) includes a control unit (30) having a first control mode for controlling a circulating current (Icc) that is circulated among leg circuits (25) of respective phases within a power converter (1) such that the circulating current (Icc) includes an alternating current component having a frequency that is an even number multiple, excluding multiples of 3, of the frequency of the fundamental wave of the alternating current. The control unit determines the active or inactive states of the first control mode on the basis of the voltage value of an energy accumulation element (12).　

Today, printed circuit boards are found in almost all modern electronic devices. Whether it is a simple gadget like a toy or a complex one like a computer, they all use a circuit board. However, there are different types of PCBs, including single-layer, double-layer, and multilayer PCBs. Due to advancements in technology, multilayer PCB are

III-Nitrides, especially InGaN, are promising for high-efficiency thermoelectric (TE) components operating at high temperatures (HTs), playing a critical role in the recovery of waste heat for sustainable energy development. However, the performance of InGaN TE materials is limited by the high thermal conductivity (k) and the conflict coupling between the power factor (PF) and the k. Here, the previously unstudied two-dimensional InGaN/GaN SL structured TE device with a high In composition of 31% was developed and demonstrated to improve the TE figure of merit (ZT, Z = PF/k) by reducing the k value without deteriorating the PF. The Seebeck coefficient (S) exhibited a value of − 365 μV/K due to the increased density of electron states near the Fermi level by the low dimensional construction. Simultaneously, a relatively low k was obtained as 7.7 W/m·K, benefitting from the alloying and SL interface scattering effect of high energy phonons. Moreover, enhancement of the Umklapp process by the space confinement effect further lowers the k. Accordingly, a record ZT value of 0.089 at 300 K was achieved, which was better than previously reported values for GaN-based TE film materials. This work provides a new material system for improving the performance of nitride TE materials at HTs and extends the fields of application in electricity harvesting from waste heat. © 2022 Elsevier Ltd PublicationName: Nano EnergyAffiliations: University of Chinese Academy of Sciences / China Institute of Semiconductors Chinese Academy of Sciences / China Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application / China doi: 10.1016/j.nanoen.2022.107568 eIssn: Volume: 101 IssueIdentifier:

The paper is dedicated to the improvement of efficiency of small-scale wind turbines’ (SSWT) power electronic converters. An efficiency of the 3-phase voltage source inverter that operates with low output voltage (<60 V) and high grid-side input voltage (380 V) is investigated. Such a solution allows skipping the intermediate DC/DC boost converter and thus reducing conversion losses and complexity of a system. The inverter has to oaperate with low duty cycles, which, in turn, demands increasing of switching speed and thus requires application of advanced transistors. To evaluate the switching performance, studies were carried out with various types of switches, namely Si IGBT, Si MOSFET, Cascode SiC JFET, SiC MOSFET using classic gate drivers and proposed current source drivers. Detailed switching waveforms were obtained using the double pulse method and analyzed for each type of the switch. The switching speed was assessed and losses were evaluated. Two types of transistors were selected for testing in the VSI paired with an EMRAX 228 generator. Inverter efficiency data was obtained and analyzed for two types of transistors/drivers and the speed-torque curve applicable for a 3 kW turbine. It is shown that the suggested solution improves the efficiency of SSWTs’ inverters. © 2022 Elsevier Ltd PublicationName: International Journal of Electrical Power and Energy SystemsAffiliations: Hochschule Esslingen / Germany doi: 10.1016/j.ijepes.2022.108160 eIssn: Volume: 141 IssueIdentifier:

Piezoelectric bimorph cantilever is a typical collecting structure for vibration energy, however it can not adapt to the low frequency and random of vibration excitation in natural environment. In this paper, the physical model of linear vibration system of piezoelectric bimorph cantilever is analyzed, where the piezoelectric energy harvester with multi-cantilever is designed for it’s disadvantages. By increasing the cantilever beam with different natural frequencies, the energy harvester has the characteristics of broadband. By measuring the dynamic strain under sweep excitation in the simulation of Comsol, Compare the output voltage and working bandwidth between the piezoelectric bimorph cantilever and the piezoelectric energy harvester with multi-cantilever, verify the broadband characteristics of the latter. This paper also designs the rectifier circuit, to convert alternating current from the energy harvester into direct current.

PEACHTREE CITY, GA – Registrants for the PCB West exhibition this fall will gain access to nine free technical sessions, the Printed Circuit Engineering Association announced today. The sessions take place on October 5 at the Santa Clara Convention Center, and run the gamut from advanced packaging to design, fabrication and assembly.

[...] We recently conducted a roundtable with a team of printed electronic circuit experts from companies that run the gamut: John Lee and Kevin Miller of Insulectro, Mike Wagner of Butler Technologies, Tom Bianchi of Eastprint, and John Voultos of Sheldahl Flexibl [...]

Vous souvenez-vous des décalcomanies thermocollantes ? Tout ce que vous aviez […]

Everything you need to know about RF and Ceramic Capacitors Webinar takes a deep dive into what makes a radio frequency capacitor unique and the roles

Today, printed circuit boards are found in almost all modern electronic devices. Whether it is a simple gadget like a toy or a complex one like a computer, they all use a circuit board. However, there are different types of PCBs, including single-layer, double-layer, and multilayer PCBs. Due to advancements in technology, multilayer PCB are

PEACHTREE CITY, GA – Registrants for the PCB West exhibition this fall will gain access to nine free technical sessions, the Printed Circuit Engineering Association announced today. The sessions take place on October 5 at the Santa Clara Convention Center, and run the gamut from advanced packaging to design, fabrication and assembly.

Abstract The comfort of the modern society is somehow relied on production of high voltage and high frequency devices. Being mature in performance, wide bandgap semiconductors have replaced silicon-based devices. However, wide bandgap semiconductor devices are plagued with their premature breakdown, which owes to edge effects. Present work demonstrates breakdown voltage enhancement in GaN based Schottky diode using trench edge termination technique. Al2O3 was filled in the trench of the structure. The atlas module of the Silvaco TCAD software has been used to replicate the device structure. Numerous models for ionization, recombination, impact ionization and mobility have been used. The breakdown voltage of the device is estimated to be 350 V due to the increase in the electric field at the edges. Using trench termination, the edge electric field crowding has been found spreading away from the edges of the device and in the Al2O3 layer. As a consequence, the trench edge terminated device has a reverse breakdown voltage increased to 1800 V.

III-Nitrides, especially InGaN, are promising for high-efficiency thermoelectric (TE) components operating at high temperatures (HTs), playing a critical role in the recovery of waste heat for sustainable energy development. However, the performance of InGaN TE materials is limited by the high thermal conductivity (k) and the conflict coupling between the power factor (PF) and the k. Here, the previously unstudied two-dimensional InGaN/GaN SL structured TE device with a high In composition of 31% was developed and demonstrated to improve the TE figure of merit (ZT, Z = PF/k) by reducing the k value without deteriorating the PF. The Seebeck coefficient (S) exhibited a value of − 365 μV/K due to the increased density of electron states near the Fermi level by the low dimensional construction. Simultaneously, a relatively low k was obtained as 7.7 W/m·K, benefitting from the alloying and SL interface scattering effect of high energy phonons. Moreover, enhancement of the Umklapp process by the space confinement effect further lowers the k. Accordingly, a record ZT value of 0.089 at 300 K was achieved, which was better than previously reported values for GaN-based TE film materials. This work provides a new material system for improving the performance of nitride TE materials at HTs and extends the fields of application in electricity harvesting from waste heat. © 2022 Elsevier Ltd PublicationName: Nano EnergyAffiliations: University of Chinese Academy of Sciences / China Institute of Semiconductors Chinese Academy of Sciences / China Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application / China doi: 10.1016/j.nanoen.2022.107568 eIssn: Volume: 101 IssueIdentifier:

The paper is dedicated to the improvement of efficiency of small-scale wind turbines’ (SSWT) power electronic converters. An efficiency of the 3-phase voltage source inverter that operates with low output voltage (<60 V) and high grid-side input voltage (380 V) is investigated. Such a solution allows skipping the intermediate DC/DC boost converter and thus reducing conversion losses and complexity of a system. The inverter has to oaperate with low duty cycles, which, in turn, demands increasing of switching speed and thus requires application of advanced transistors. To evaluate the switching performance, studies were carried out with various types of switches, namely Si IGBT, Si MOSFET, Cascode SiC JFET, SiC MOSFET using classic gate drivers and proposed current source drivers. Detailed switching waveforms were obtained using the double pulse method and analyzed for each type of the switch. The switching speed was assessed and losses were evaluated. Two types of transistors were selected for testing in the VSI paired with an EMRAX 228 generator. Inverter efficiency data was obtained and analyzed for two types of transistors/drivers and the speed-torque curve applicable for a 3 kW turbine. It is shown that the suggested solution improves the efficiency of SSWTs’ inverters. © 2022 Elsevier Ltd PublicationName: International Journal of Electrical Power and Energy SystemsAffiliations: Hochschule Esslingen / Germany doi: 10.1016/j.ijepes.2022.108160 eIssn: Volume: 141 IssueIdentifier:

Piezoelectric bimorph cantilever is a typical collecting structure for vibration energy, however it can not adapt to the low frequency and random of vibration excitation in natural environment. In this paper, the physical model of linear vibration system of piezoelectric bimorph cantilever is analyzed, where the piezoelectric energy harvester with multi-cantilever is designed for it’s disadvantages. By increasing the cantilever beam with different natural frequencies, the energy harvester has the characteristics of broadband. By measuring the dynamic strain under sweep excitation in the simulation of Comsol, Compare the output voltage and working bandwidth between the piezoelectric bimorph cantilever and the piezoelectric energy harvester with multi-cantilever, verify the broadband characteristics of the latter. This paper also designs the rectifier circuit, to convert alternating current from the energy harvester into direct current.

A ceramic feedthrough assembly has a feedthrough interface sleeve brazed to a ceramic feedthrough body and a housing interface sleeve brazed to the feedthrough interface sleeve. The housing interface sleeve is configured to be integrated within an electronic device and welded to a metal housing to form a hermetically sealed electronic device. The ceramic feedthrough has at least one embedded electrical conductor extending from a first location on the ceramic feedthrough body to a second location on the ceramic feedthrough body. The feedthrough interface sleeve is positioned around the ceramic feedthrough body between the first location and the second location and brazed to the wrap-around metallization. When the metal housing is welded to the housing interface sleeve, the ceramic feedthrough assembly facilitates connection to an electronic circuit hermetically sealed in the electronic device with the metal housing.

The present invention relates to a new class of dielectric polymer material, which is particularly suitable for the manufacturing of electronic devices. The dielectric polymer material is formed by reacting bismaleimide compounds and shows an advantageous well-balanced profile of favorable material properties. The bismaleimide compounds have an oligomeric structure with an oligoamide extended repeating unit in the middle part of the molecule and maleimide groups at each terminal end of the molecule. There is further provided a method for forming said dielectric polymer material. Beyond that, the present invention relates to the dielectric polymer material and to an electronic device comprising the same.

An electronic apparatus according to various embodiments comprises: a housing having a coupling region; and a printed circuit board that has an overlap region overlapping the coupling region and a non-overlap region not overlapping the coupling region. The printed circuit board includes a plurality of metal layers and a plurality of lines. The printed circuit board may include a void section in which a portion of at least one metal layer close to the coupling region among the plurality of metal layers is not formed.

A first electric power conversion device (10) can convert electric power which has been generated by a power generation device (4a) that uses renewable energy to generate electric power into AC power at a predetermined voltage, and output the AC power to a power reception point of an electric power system (2). A second electric power conversion device (20) comprises a control unit (25), an inverter (22), and a converter (21) capable of charging and discharging a power storage unit (5). During an interruption of power to the electric power system (2), an independent output pathway of the second electric power conversion device (20) is connected to an interconnection output pathway of the first electric power conversion device (10). When electric power input to the AC side of the inverter (22) has exceeded or is predicted to exceed the maximum chargeable power of the power storage unit (5), the control unit (25) performs control such that the output of the first electric power conversion device (10) is suppressed or blocked.

A power conversion device (100) includes a control unit (30) having a first control mode for controlling a circulating current (Icc) that is circulated among leg circuits (25) of respective phases within a power converter (1) such that the circulating current (Icc) includes an alternating current component having a frequency that is an even number multiple, excluding multiples of 3, of the frequency of the fundamental wave of the alternating current. The control unit determines the active or inactive states of the first control mode on the basis of the voltage value of an energy accumulation element (12).