便携式温差发电装置性能研究

Properties of a portable thermoelectric generator

基于温差发电原理设计、制作用于野外紧急充电的便携式温差发电装置,将野外可燃物产生的热能作为热源,直接将热能转化为电能,并利用一部分自发电驱动小水泵将装置冷端的热量带走。该装置采用USB接口作为输出端为各种数码设备充电。以塞贝克效应为基础,主要讨论了散热端水量、水流速度等对温差电势的影响以及装置热端加热的最佳搭配方式。测试结果表明,该装置的最佳加热搭配方式是一块固体酒精与10cm高的燃烧架的方式。由4块40mm×40mm低温发电模组组成的发电装置最大的发电功率为3.5~4 W,单位面积发电功率为580 W/m^-2。

Based on the principle of thermoelectric effects,aportable thermoelectric power generation device with a USB interface for outdoor emergency electricity charging that can directly convert heat into electricity from various heat source is designed,with a self-driving small pump as heat sink.The effects of the cooling water volume and flowing velocity,as well as the heat source design,on the thermoelectric potential,based on the Seebeck effect,are explored,leading to an optimized match between one solid alcohol and 10 cm high combustion frame as heat source for best performance of the designed device having 4commercial 40mm×40mm thermoelectric modules,which can output a maximum power of 3.5-4W with a power density of 580W·m-2.