Frontiers in Energy >

2020 , Vol. 14 >Issue 1: 1 - 10

DOI: https://doi.org/10.1007/s11708-019-0655-6

RESEARCH ARTICLE

A space power system of free piston Stirling generator based on potassium heat pipe

  • Mingqiang LIN 1 ,
  • Jian MOU , 1 ,
  • Chunyun CHI 1 ,
  • Guotong HONG 1 ,
  • Panhe GE 2 ,
  • Gu HU 2
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  • 1. Key Laboratory of Space Energy Conversion Technology, Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100049, China
  • 2. China Institute of Atomic Energy, China National Nuclear Corporation, Beijing 100822, China

Received date: 29 May 2019

Accepted date: 26 Aug 2019

Published date: 15 Mar 2020

Copyright

2020 Higher Education Press and Springer-VerlagGmbH Germany, part of Springer Nature
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Abstract

The power system of a free piston Stirling generator (FPSG) based on potassium heat pipes has been developed in this paper. Thanks to the advantages of long life, high reliability, and high overall thermal efficiency, the FPSG is a promising candidate for nuclear energy, especially in space exploration. In this paper, the recent progress of FPSG based on nuclear reactor for space use was briefly reviewed. A novel FPSG weighted only 4.2 kg was designed, and one dimensional thermodynamic modeling of the FPSG using Sage software was performed to estimate its performance. The experiment results indicated that this FPSG could provide 142.4 W at a thermal-to-electric efficiency of nearly 17.4%. Besides, the power system integrated with four FPSGs and potassium heat pipes was performed and the single machine failure test was conducted. The results show that this system could provide an electrical power of 300 W at an overall thermal efficiency of 7.3%. Thus, it is concluded that this power system is feasible and will have a great prospect for future applications.

Key words： free piston Stirling generator (FPSG); potassium heat pipe; power system; energy conversion

Cite this article

Mingqiang LIN , Jian MOU , Chunyun CHI , Guotong HONG , Panhe GE , Gu HU . A space power system of free piston Stirling generator based on potassium heat pipe[J]. Frontiers in Energy, 2020 , 14(1) : 1 -10 . DOI: 10.1007/s11708-019-0655-6

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 51806227).

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