Thermoelectric Generator Design in Dynamic Thermoelectric Energy Harvesting

[摘要] This paper reports an analysis of thermoelectric generator design for dynamic thermoelectric harvesting. In such devices, the available energy for a given temperature cycle is finite and determined by the heat storage unit capacity. It is shown by simulation and experimentally that specific thermoelectric generator designs can increase the energy output, by optimizing the balance between heat leakage and dynamic response delay. A 3D printed, doublewall heat storage unit is developed for the experiments. Output energy of 30 J from 7.5 gr of phase change material, from a temperature cycle between ± 22°C is demonstrated, enough to supply typical duty-cycled wireless sensor platforms. These results may serve as guidelines for the design and fabrication of dynamic thermoelectric harvesters for applications involving environments with moderate temperature fluctuations.

[发布机构] University of California at Berkeley, CA, United States^1;Imperial College London, United Kingdom^2;ATEI Thessaloniki, Greece^3;Airbus Group Innovations, Germany^4

[效力级别] 能源学

[关键词] Available energy;Heat storage units;Moderate temperature;Temperature cycles;Thermo-electric generators;Thermoelectric energy;Thermoelectric harvesters;Wireless sensor