空间堆碱金属热电转换系统性能分析与优化

随着深空探测的不断发展,作为最具发展潜力的动力能源之一,空间核动力系统的研究引起国内外学者广泛关注。空间核反应堆电源包含静态和动态转换两种方式,而在静态热电转换方式中,碱金属热电转换技术具有高效率、高功率密度和高比功率等优点,但其实际效率远低于理论水平,提高其效率等性能具有重要意义。本文采用碱金属热电转换系统的电特性模型和效率模型,探究BASE厚度、电流密度、高温区温度以及低温区温度对其效率和功率密度等性能的影响。在此基础上,以效率为优化目标,选取合适参数以获得较好的性能。

System Performance and Optimization of Alkali Metal Thermal to Electric Convertor in Space Reactor System

With the continuous development of deep space exploration,as one of the most promising power source,space nuclear power systems have attracted wide attention from scholars at home and abroad.In the static thermoelectric conversion system,Alkali Metal Thermal to Electric Convertor(AMTEC)is a new kind of thermoelectric conversion technology with great development potential,but its actual efficiency is far below the theoretical level.The electrical characteristics model and efficiency model of the AMTEC is established to investigate the influence of the BASE thickness,current density,high temperature zone temperature and low temperature zone temperature on its performances such as efficiency and power density.Based on this,the appropriate parameters were selected to optimize the performance of the system.