本发明公开了一种能量转换系统及其应用。其包括三机一体系统、核反应堆、回热器和预冷器；回热器和预冷器分别设置于核反应堆的轴线的两端延长线上，三机一体系统位于核反应堆的正上方；三机一体系统包括同轴设置的压缩机、发电机和透平，发电机位于压缩机和透平的中间；压缩机用于氦氙气体的增压；核反应堆用于向氦氙气体提供热量；第三氦氙气体出口、回热器的热流体通道、预冷器和第一氦氙气体进口依次连接，构成氦氙气体循环回路；回热器和预冷器均采用印刷电路板式换热器。该系统可以同时满足高热量转换效率、高发电效率、低系统尺寸和系统重量的要求。

The invention discloses an energy conversion system and its application. It comprises a turbine-alternator-compressor integrated system, a nuclear reactor, a recuperator and a precooler. The recuperator and the precooler are respectively arranged on the extension lines at both ends of the nuclear reactor, and the turbine-alternator-compressor integrated system is located directly above the nuclear reactor. The turbine-alternator-compressor integrated system comprises a compressor, generator and turbine, and the generator is located in the middle of the compressor and turbine; Compressor is used to pressurize helium-xenon gas. Nuclear reactor is used to provide heat to helium-xenon gas. The third helium-xenon gas outlet, the hot fluid channel of the recuperator, the precooler and the first helium-xenon gas inlet are connected to form a helium-xenon cycle loop. Both recuperator and precooler are printed circuit plate heat exchangers. The system can simultaneously meet the requirements of high heat conversion efficiency, high power generation efficiency, small system size and system weight.