U Influence of Non-Condensable Gas in Mobile Heat Pipe Small Reactor on Heat Pipe Heat Transfer Performance

Heat pipe cooled reactors have a promising future in the next generation of reactor design. The heat pipe, which is the core device for heat transfer from the core to the outside, determines the safety of the heat pipe reactor and the efficiency of power generation. In the high-temperature, high-pressure, high-irradiation environment of a nuclear reactor, the non-condensable gas produced by the lithium heat pipe - helium - affects the heat transfer efficiency of the heat pipe. Therefore, by modeling the heat transfer process of the heat pipe, the effect of the content of the non-condensable gas on the heat transfer performance of the heat pipe is calculated. It can be concluded that: at a certain input power, the temperature of both the hot end and the cold end of the heat pipe increases with the increase of the content of non-condensable gas; the distribution of non-condensable gas in the heat pipe is irregular, more at the hot end and less at the cold end; at a certain input power, the equivalent thermal resistance of the heat pipe increases with the increase of the content of non-condensable gas, and the higher the content of non-condensable gas, the greater the effect on the heat transfer effect of the heat pipe; in a certain range The effect of power on the equivalent thermal resistance of heat pipe is almost none.