On-orbit Experiment of Stirling Thermoelectric Conversion Technology in Space
In order to improve the efficiency and power of space isotope power supply and meet the spacecraft energy requirements of space missions such as deep space exploration,manned lunar landing and Mars landing,the key technologies involved in space free-piston Stirling thermoelectric conversion is sorted out,and the on-orbit experiment program of space free-piston Stirling thermoelectric conversion device in Tiangong space station is designed.The Stirling thermoelectric conversion experiment is carried out on orbit.This experiment verifies key technologies such as gap sealing,phase keeping of double pistons in free motion under the space microgravity environment.Meanwhile,the key parameters such as precise phase keeping and drift characteristics of double free pistons under the space environment,and the strong coupling characteristics of dynamics and thermodynamics are obtained.The results of the on-orbit experiment show that the experiment device has good performance on-orbit operation and the thermoelectric conversion efficiency reaches 24.72%,which lays a foundation for the application of energy technology for the tasks which does not rely on solar energy such as future space high-efficiency isotope power supply.
Tiangong space stationSpace isotope powerFree pistonStirling thermoelectric conversionOn-orbit experiment
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