毛细芯蒸发器启动和运行特性

Startup and Operating Characteristics of Capillary Wick Evaporator

通过对毛细芯蒸发器(相当于环路热管在没有连接蒸气管路的情况)进行试验研究,巧妙地避开了工质循环和冷凝器等带来的影响,专注于研究毛细芯孔隙率和热源功率对蒸发器启动和运行特性的影响。结果表明:在某些条件下,毛细芯蒸发器启动时温度会出现剧烈的波动;毛细芯孔隙率越大,产生温度波动所对应的热源功率越小;毛细芯相同时,热源功率越大,越容易出现温度波动,并且温度波动的程度越剧烈。温度波动的原因是毛细芯孔隙率与热源功率等外部参数不匹配。

The effects of porous wick porosity and heat source power on startup and operating characteristics of capillary wick evaporator （just like a loop heat pipe without linking the vapor line） was investigated. The experiment was carried out without mixing the effect of the working fluid and the condenser. The result shows that the temperature of the evaporator will fluctuate in some cases during the startup of the system. The heat source power which makes the temperature fluctuated decreasingly with the increasing porosity of the porous wick. When porous wick is the same, temperature is easier to fluctuate and it will be much serious with the bigger heat source power. The reason for the temperature fluctuation is that the porosity of porous wick does not match with the outside parameters, such as the heat course power.