再生式蒸发冷却降温系统的实验研究
Experimental Research on a Regenerative Evaporative Cooling System

再生式蒸发冷却是露点蒸发冷却的主要形式之一，可以在不改变空气湿度的情况下将空气温度降至湿球温度以下。本文建立了实验系统，并对不同环境下采用再生式蒸发冷却系统的降温能力进行实验研究，分析新风温度、湿度、风速及供水水温对系统性能的影响。结果表明：系统在高温低湿条件下具有较好的制冷效果。环境温度为31 ℃，相对湿度为31.5%时，进/出口温降为5.6 ℃；而相对湿度为60%时，进/出口温降仅为3.4 ℃；降低供水水温可以提高系统制冷效率。新风温度为35 ℃，相对湿度为60%时，当水温为13 ℃时，进/出口温降为6.5 ℃；当供水水温为31 ℃时，进/出口温降仅为3.3 ℃。
Regenerative evaporative cooling is one of the main forms of dew point evaporative cooling. Regenerative evaporative cooling can cool the air below the wet bulb temperature without changing the humidity of air. An experimental system is established in this study, and an experimental research on the cooling capacity of regenerative evaporative cooling under different environmental conditions is carried out. The effects of fresh air temperature, humidity, speed, and water supply temperature on the system performance are analyzed. The experimental results show that the system provides a good cooling effect under the conditions of high temperature and low humidity. At an ambient temperature of 31 ℃, the temperature drop is 5.6 ℃ at a relative humidity of 31.5%, whereas the temperature drop is only 3.4 ℃ at a relative humidity of 60%. Reducing the temperature of the water supply can improve the cooling efficiency of the system. By setting the fresh air temperature at 35 ℃ and ?the relative humidity at 60%, the temperature drop between the inlet and outlet when the water temperature is 13 ℃ is 6.5 ℃. When the water temperature is 31 ℃, the temperature drop between the inlet and outlet is only 3.3 ℃