气—气型重力式热管换热器用于热回收时,首先要根据给定的温度范围选择热管。关于热管工质的允许工作温度范围,许多热管文献都有介绍(1～3)。但是工作状态下热管管内工质温度如何计算:对于给定的冷、热流体温度,如何根据热管工质的许用温度调节冷热端热阻;或者如何根据已知的冷热流 Gas-gas gravity heat pipe heat exchanger for heat recovery, the first to be selected according to a given temperature range heat pipe. Many heat pipe literature is available on the permissible operating temperature range of heat pipe fluids (1-3). However, how to calculate the temperature of the working fluid in the heat pipe under the working condition: how to adjust the thermal resistance of the hot and cold ends according to the allowable temperature of the heat pipe for a given cold and hot fluid temperature;