Electrodeposition preparation and optimization of fan-shaped miniaturized radioisotope thermoelectric generator
Electrodeposition preparation and optimization of fan-shaped miniaturized radioisotope thermoelectric generator
复制标题
扇形小型放射性同位素热电发生器的电沉积制备及优化
DOI：
10.1016/j.energy.2019.116873
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发表时间：
2020-03
期刊：
影响因子：
9
通讯作者：
Liu Kai
中科院分区：
文献类型：
--
作者：
Xu Zhiheng;Li Junqin;Tang Xiaobin;Liu Yunpeng;Jiang Tongxin;Yuan Zicheng;Liu Kai
鉴于目前在深空探索等极端环境领域对小型化设备的能源需求。提出并设计了一种新型扇形放射性同位素温差发电器。用于小型化放射性同位素热电发生器的薄膜热电材料首次采用电化学方法制备。所制备的扇形放射性同位素热电发生器体积为5.75 cm3，由8个热电模块和32个热电腿组成。研究发现，当加载1.5W的热源时，器件的温差为54.8K，输出电压和最大输出功率分别为174.88mV和333.20nW。在此基础上，利用有限元法对模块的数量和尺寸进行了优化。当热电腿尺寸优化为9 × 2 mm2，模块数为8时，最大输出功率可达369.02 nW。相应的实验验证工作进一步发展和讨论。该工作为解决极端空间环境下小体积器件的能量供应问题提供了一种新的解决方案。
In view of the current energy demand for miniaturized equipment in extreme environmental fields, such as in deep space exploration. A new fan-shaped radioisotope thermoelectric generator is innovatively presented and designed. Thin-film thermoelectric materials used for miniaturized radioisotope thermoelectric generators are first prepared by electrochemical methods. The prepared fan-shaped radioisotope thermoelectric generator has a volume of 5.75 cm3and consists of 8 thermoelectric modules and 32 thermoelectric legs. The study finds that when a 1.5 W heat source is loaded, the temperature difference of the device is 54.8 K, the output voltage and the maximum output power is 174.88 mV and 333.20 nW, respectively. On this basis, the number and size of the modules are optimized by the finite element method. When the thermoelectric leg size is optimized to 9 × 2 mm2and the number of modules is 8, the maximum output power can be up to 369.02 nW. The corresponding experimental verification work is further developed and discussed. This work provides a novel solution for the energy supply problem of small-volume devices in extreme space environments.
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