Green energy harvesting from ambient RF radiation

2016 ◽  
Author(s):  
Saswati Ghosh ◽  
Ajay Chakrabarty
Keyword(s):  
Energy Harvesting ◽  
Green Energy

scholarly journals Scalable thermoelectric fibers for multifunctional textile-electronics

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Tianpeng Ding ◽  
Kwok Hoe Chan ◽  
Yi Zhou ◽  
Xiao-Qiao Wang ◽  
Yin Cheng ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Green Energy ◽  
Process Efficiency ◽  
Robotic Arm ◽  
Practical Applications ◽  
Flexible Devices ◽  
Fiber Fabrication ◽  
Mechanical Compliance ◽  
Limited Scale ◽  
High Scalability

AbstractTextile electronics are poised to revolutionize future wearable applications due to their wearing comfort and programmable nature. Many promising thermoelectric wearables have been extensively investigated for green energy harvesting and pervasive sensors connectivity. However, the practical applications of the TE textile are still hindered by the current laborious p/n junctions assembly of limited scale and mechanical compliance. Here we develop a gelation extrusion strategy that demonstrates the viability of digitalized manufacturing of continuous p/n TE fibers at high scalability and process efficiency. With such alternating p/n-type TE fibers, multifunctional textiles are successfully woven to realize energy harvesting on curved surface, multi-pixel touch panel for writing and communication. Moreover, modularized TE garments are worn on a robotic arm to fulfill diverse active and localized tasks. Such scalable TE fiber fabrication not only brings new inspiration for flexible devices, but also sets the stage for a wide implementation of multifunctional textile-electronics.

scholarly journals Compact Wearable Meta Materials Antennas for Energy Harvesting Systems, Medical and IOT Systems

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1340 ◽  
Author(s):  
Albert Sabban
Keyword(s):  
Energy Harvesting ◽  
High Efficiency ◽  
Dynamic Range ◽  
Green Energy ◽  
Ring Resonators ◽  
Green Technologies ◽  
Continuous Growth ◽  
Harvesting Systems ◽  
Low Efficiency ◽  
Line Design

Demand for green technologies and green energy is in continuous growth in the last decade. Compact efficient radiators are very important for energy harvesting portable systems. Small antennas have low efficiency. The efficiency of communication and energy harvesting systems may increase by using efficient passive and active antennas. The system dynamic range may be improved by connecting amplifiers to the printed antenna feed line. Design, design considerations, computed and measured results of wearable meta-materials antennas with high efficiency for energy harvesting applications are presented in this paper. The antennas electrical parameters on human body were analyzed by using commercial full-wave software. The wearable antennas are compact and flexible and are 1.6 mm thick. The directivity and gain of the antennas with Split-ring resonators (SRR), is higher by 2 dB to 3 dB than the antennas without SRR. The resonant frequency of the antennas without SRR is higher by 5% to 10% than the antennas with SRR.

scholarly journals Fast-response/stable Ni–Bi cells achieved using hollowed-out Bi@carbon nanospheres: a preferred electricity storage choice to couple with clean energy harvesting

2020 ◽  
Vol 4 (4) ◽  
pp. 1249-1255 ◽  
Author(s):  
Jiajia Yao ◽  
Linpo Li ◽  
Ning Li ◽  
Jian Jiang ◽  
Yanlong Wang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Clean Energy ◽  
Fast Response ◽  
Green Energy ◽  
Carbon Nanospheres ◽  
Electricity Storage

Fast-response/stable Ni–Bi cells achieved by hollowing-out Bi@carbon nanospheres are an improved electricity storage choice to couple with green energy harvesting.

scholarly journals Harvesting in electric vehicles: combining multiple power tracking and fuel-cells

2020 ◽  
Vol 10 (5) ◽  
pp. 5058 ◽  
Author(s):  
Juan-Gerardo Parada-Salado ◽  
Luis-Fernando Gaona-Cárdenas ◽  
Martín-Antonio Rodríguez-Licea ◽  
Francisco-Javier Pérez-Pinal
Keyword(s):  
Energy Harvesting ◽  
Hybrid Electric Vehicle ◽  
Green Energy ◽  
Energy Harvest ◽  
Solar Panels ◽  
Energy Management Strategy ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Cell Energy ◽  
Power Point

Exploitation of green energy sources is essential to diminish the deterioration of our environment. The energy harvesting, represents an alternative to achieve greater range in electric and hybrid vehicles. An energy management strategy (EMS) must be optimized to obtain the best benefits in such vehicles, which is not a trivial task. If harvesting or energy recovery devices are added, the EMS becomes a dual-purpose algorithm: minimizing fuel consumption and maximizing energy harvest through maximum power point tracking (MPPT) controllers. Known studies consider separate EMS, one for traction and another for regenerative braking, without considering harvest devices such as solar panels, regenerative suspension, thermal generators, among others. Furthermore, the electronic power converters used, are not designed to handle such unequal power levels. In this article, an electronic platform to include multiple energy harvesting devices in a fuel-cell hybrid electric vehicle, was presented together with a multiple MPPT-EMS. The EMS is easily implementable, and considers quasiconstant cell energy extraction and filtering of current transients to the battery bank ensuring the longevity of the devices. A new mathematical model of the platform, a closed loop stability analysis, and numerical and Hardware-in-the-Loop (HIL) validations were presented. Some experimental validation results were also provided.

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