不同蒸发冷却装置工作的影响因素及对比

Influencing factors and comparison of the operation of two evaporative cooling devices

采用CFD模拟了2种蒸发冷却装置,讨论了一次空气入口温度和喷淋水温度对蒸发冷却装置效率的影响。通过模拟一、二次空气出口处的温度分布,水蒸气相分布以及装置内整个通道的温度分布,得到影响2个蒸发冷却装置的传热性能的变化规律。同时,比较2个蒸发冷却装置的传热性能,给出了一种确定蒸发冷却装置性能的方法。对于管式蒸发冷却装置,选择管径为5 mm和10 mm,管间距为5 mm和10 mm的装置进行模拟。对于板式蒸发冷却,取板长度为500 mm和1 000 mm,并且板宽度为6 mm,8 mm和10 mm用于模拟。通过模拟得到装置尺寸对蒸发冷却效率的影响。

Two evaporative cooling devices are simulated by CFD. The effects of primary air inlet temperature and spray water temperature on the efficiency of evaporative cooling device are discussed. By simulating the temperature distribution at the secondary air outlet,the water vapor phase distribution and the temperature distribution of the entire passage in the device,the variation law affecting the heat transfer performance of the two evaporative cooling devices is obtained. At the same time,comparing the heat transfer performance of two evaporative cooling devices,a method for determining the performance of the evaporative cooling device is given. For the tube evaporative cooling unit,a device with a diameter of 5 mm and 10 mm and a tube spacing of 5 mm and 10 mm was selected for simulation. For plate evaporative cooling,the plate length is 500 mm and 1000 mm,and the plate width is 6 mm,8 mm and 10 mm for simulation. The effect of device size on evaporative cooling efficiency was obtained by simulation.