In this study, the performance of an evaporative cooling unit device based on the M-cycle cooling principles is evaluated experimentally. Numerical models of the experimental prototype and its scale model have been developed by using CFD software. Numerical analysis of a multi-unit evaporative cooling device in series has been carried out. The cooling effect of multistage series and multistage iteration is also studied. Experimental result shows that under low relative humidity, the decrease in air temperature along the channel is greater than that under a higher relative humidity. The predicted outlet temperature of the dry and wet channels by the experimental-sized model agrees well with the experimental results. The effect of different air volumes in each stage on the cooling (wet-bulb and dew-point) effectiveness is discussed. It’s found that under the same air volume at each stage, the smaller-sized model can achieve 18.3% higher cooling effectiveness compared with the experimental-sized model. The wet-bulb effectiveness of the smaller-sized model with halved flow rate of each stage could achieve as high as 117%. Furthermore, the first stage among four-stage evaporative cooling model has the highest cooling effectiveness.

在这项研究中，实验评估了基于M循环冷却原理的蒸发冷却装置的性能。使用CFD软件开发了实验原型的数值模型及其比例模型。已经对串联的多单元蒸发冷却装置进行了数值分析。还研究了多级串联和多级迭代的冷却效果。实验结果表明，在较低的相对湿度下，沿通道的气温下降幅度大于较高的相对湿度下的下降幅度。实验规模模型预测的干，湿通道出口温度与实验结果吻合良好。讨论了每个阶段中不同风量对冷却（湿球和露点）效率的影响。结果发现，在每个阶段相同的风量下，与实验尺寸的模型相比，较小尺寸的模型可以实现高18.3％的冷却效率。每个阶段流量减半的小型模型的湿球效率可高达117％。此外，四级蒸发冷却模型中的第一级具有最高的冷却效率。