RT Journal T1 A space power system of free piston Stirling generator based on potassium heat pipe A1 Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU PB Front. Energy FD 2020-03-15 YR 2020 JF Frontiers in Energy JO Front. Energy VO 14 IS 1 SP 1 DO 10.1007/s11708-019-0655-6 K1 free piston Stirling generator (FPSG);potassium heat pipe;power system;energy conversion LK {https://journal.hep.com.cn/fie/EN/article/article_26482.shtml}