冷凝器蒸发冷却对制冷机组性能影响的实验研究

Experimental Research on the Influence of Evaporative Cooling on Chiller Performance

蒸发冷却可以利用潜热降低冷凝器进风温度,因而在制冷机组节能等领域具有重要应用价值。本文针对三峡地下水电站的空冷制冷机组,在冷凝器进风进行蒸发冷却的条件下,实验测量了机组运行的各种性能参数,分析了机组的运行规律,研究了不同环境温度和湿度条件下蒸发冷却对机组性能的影响。实验结果表明冷凝器进风采用蒸发冷却可以明显提高机组的性能:在高温低湿环境下,对冷凝器进风进行蒸发冷却,机组总功率减小,效率提高。并且,当环境空气的干球温度逐渐升高,相对湿度逐渐降低时,冷凝器进风蒸发冷却的节能效果更加明显。

Evaporative cooling is significant for energy conservation of chillers,because the latent heat during water evaporation benefits the decrease of condensation pressure and temperature in condenser.This paper studied the influences of evaporative cooling on an air cooling chiller installed in the underground hydroelectric power plant of the Three Gorges.We measured the working parameters of the chiller with the evaporative cooling of the condenser inlet air,and further analyzed the chiller performance with different ambient temperatures and humilities.Experimental results showed that the evaporative cooling process of condenser inlet air benefits the improvement of the chiller performance,where it contributes to the reduction of the total power consumption in condition of higher temperature and lower humidity.Meanwhile,increasing the environment temperature and decreasing the humidity further improve the chiller performance with the evaporative cooling process of condenser inlet air.