抽气速率对真空冷却机捕水效果的影响

Effect of pumping rate on water capture efficiency of vacuum cooling machine

真空泵的抽气速率和捕水器的捕水能力是决定真空冷却效果的关键因素。为了找到二者的最佳配合方式,课题组基于自主设计的变频真空预冷机(配有一个气流路径可调的捕水器),采用3种抽速方案进行实验。结果发现:适当地改变抽速对捕水效率和失水率有显著影响(P<0.05),尤其是采用慢抽速方案可以使捕水效率提高3倍,使失水率减小78.75%。该研究可为真空冷却泵进一步降低能耗、提高产品冷却效果提供参考依据。

The pumping speed of the vacuum pump and the water capturing capacity of the water catcher are the key factors to determine the effect of vacuum cooling. In order to find the best combination of the two,a self designed frequency conversion vacuum refrigerator( with a water path adjustable water collector) was adopted,and 3 pumping speed schemes were adopted to carry out the experiment. The results showed that the pumping speed and water loss rate were significantly affected by the change of pumping speed( P < 0. 05),especially the slow pumping rate,and the water harvesting efficiency was increased by 3 times,and the water loss rate was reduced by 78. 75%. The influence of vacuum pumping speed on water capture effect is studied,which provides a basis reference for vacuum cooling to further reduce energy consumption and improve product cooling effect.