90Sr 同位素温差电源结构设计与性能分析

作者：Du Guanghan; Li Yupeng; Li Gen^*; Guo Rui; Liu Guixiu; Wang Jinshi

来源：Nuclear Power Engineering, 2023, 44(3): 104-111.

DOI：10.13832/j.jnpe.2023.03.0104

• Output power
• Radioisotope thermoelectric generator
• Sensitivity analysis
• Thermoelectric conversion
• Thermoelectric conversion efficiency

In this paper, a physical model of 90Sr radioisotope thermoelectric generator was designed, including the heat source, thermoelectric conversion module and heat dissipation module. On this basis, the finite element analysis of generator was carried out by using the COMSOL, and the temperature distribution, voltage and power output characteristics of generator were obtained. Meanwhile, the output characteristics of generator under the attenuation of the heat source power were studied, and finally the sensitivity analysis of the height and cross-sectional area of the thermoelectric material was carried out. The research results show that the maximum output power of generator is 63.6 W, the thermoelectric conversion efficiency is 7.6%, and the maximum output power of generator is reduced from 63.6 W to 24.4 W within 15 years. Sensitivity analysis found that the internal resistance and maximum output power of generator increase with the increase of the height of the thermoelectric material, and decrease with the increase of the cross-sectional area. The research results are of great significance to the application of radioisotope thermoelectric generator in harsh environments such as space and deep sea. ? 2023 Yuan Zi Neng Chuban She.

• 单位
  动力工程多相流国家重点实验室; 华南理工大学