千瓦级空间堆热离子—碱金属混合式热电转换系统设计及性能

针对空间核电转换系统静态热电转换发电效率低的问题,设计开发了一种新型的热离子-碱金属混合发电系统,即利用热离子转换系统的余热作为碱金属转换器的热源,利用余热进行二次发电以提高转换系统效率,通过建立热离子-碱金属混合发电系统数理模型,研究了热离子热电转换系统接收极功函数和系统电流密度对混合发电系统功率效率的影响,得到了两个参数的最优区间,计算结果表明热离子-碱金属混合发电系统相比于热离子热电转换系统效率约6％~10％,为静态热电转换系统的效率优化提供了理论依据。

Design and performance of thermionic-alkali metal hybrid thermoelectric of kilowatt space reactor

In view of the low efficiency of static thermoelectric conversion power generation in the current space nuclear power conversion system, a new type of thermionic-alkali hybrid power generation system was designed and developed, that is, the waste heat of the thermionic conversion system is used as the heat source of the alkali metal converter, and the waste heat is used for Secondary power generation is used to improve the efficiency of the conversion system. By establishing a mathematical model of the thermionic-alkali hybrid power generation system, the effects of the thermionic thermoelectric conversion system"s receiving pole work function and system current density on the power efficiency of the hybrid power generation system are studied, and two The optimal interval of the parameters, the calculation results show that the thermionic-alkali hybrid power generation system has an efficiency of about 6%-10% compared to the thermionic thermoelectric conversion system, which provides a theoretical basis for the efficiency optimization of the static thermoelectric conversion system.