高温锂热管故障工况传热特性研究

he heat transfer characteristics of high temperature lithium heat pipe under fault conditions are of great value to the design and safety of heat pipe reactors. The COMSOL software is used to model and calculate a single high-temperature lithium heat pipe, and the temperature change of the heat pipe under fault condition is calculated and analyzed. The temperature changes of evaporation section and condensation section of high temperature lithium heat pipe are calculated when the convective heat transfer coefficient, cold fluid temperature and input power of the condensation section change. According to the calculation results, the heat pipe temperature changes linearly with the change of three parameters, and the cold fluid temperature has the least influence on the heat pipe temperature change. Under the fault condition, the maximum temperature of the heat pipe will reach 1900K, and the heat pipe needs to be designed with enough high-temperature resistant materials.