In order to meet the needs of small modular nuclear power plant for the type selection,demonstration and overall evaluation of new power conversion technology,this study focuses on the free piston Stirling power conversion technology and the key technical problems in engineering application,comparing and analyzing the typical application concepts of the hundred-watt isotope-Stirling power supply system,the kilowatt nuclear reactor-Stirling power supply system,and the ten-kilowatt solar power-Stirling power supply system.The performance estimation models of two key parameters,output power and conversion efficiency,of Stirling power conversion system are given.The research results show that the conversion efficiency of Stirling engine is able to reach about 60％of the Camot cycle,while the output power is generally below tens of kilowatts.For more power generation through the modular configuration of multiple units,the coupling structure and heat transfer process will be the key factors affecting the performance of Stirling engine.The estimation model and analysis results proposed in the paper are useful to support the performance evaluation and engineering application of Stirling power conversion technology.
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