Abstract:As the scale of lunar exploration projects continues to expand, it is difficult to provide sufficient and sustainable energy supply for all activities on the moon just relying on the solar cells or small radioisotope power sources. The development of lunar in-situ energy supply technology is the key foundation of various lunar-based activities. The temperature difference between the day and night on the lunar surface is extremely large, while the temperature of the lunar rock layer is basically constant with a depth of more than 1 m. Based on the characteristics of the huge temperature difference between the lunar soil and rock constant temperature layer and the lunar surface, a conceptualization of lunar-based in-situ energy support technology that can use the temperature difference to generate electricity was proposed. The design and implementation of lunar thermoelectric materials thermovoltaic power generation technology and lunar magnetic levitation power generation technology were developed. The lunar thermoelectric material thermovoltaic power generation system directly used the thermoelectric materials to realize the thermoelectric conversion. The device was designed with three layers of soaking plates connected by heat pipes, which solved the problem of insufficient heat transfer caused by the poor thermal conductivity of the lunar regolith or rock. The lunar surface radiant energy (daytime) and lunar soil heat energy (night) were continuously converted into electrical energy. The lunar magnetic levitation power generation system and technology used the heat pipe to transfer heat in the lunar regolith to the generator, in which the circulating working fluid was heated and evaporated, then the magnetic levitation turbine generator worked to generate electricity. After that, the circulating working fluid was condensed by radiative heat exchange between the surface heat exchanger and space. Working fluid would be pressurized back to the generator by the pump, and it absorbed the heat pipe heat again to cycle power generation. Based on this methodology, the lunar magnetic levitation power generation system converted the temperature difference between the lunar surface and the lunar moon rock constant temperature layer into electrical energy. Those two types of power generation technologies have the advantages of no mechanical friction, high efficiency, long life and light weight, which can provide technical supports for the in-situ energy supply of lunar exploration activities.