侧面进风逆流式露点蒸发冷却器性能的数值研究  

Numerical Study on Performance of Counter Flow Dew Point Evaporative Cooler with Side Inlet

作　　者：孔令寒 杜震宇 杨晋明 赵旭东 KONG Linghan;DU Zhenyu;YANG Jinming;ZHAO Xudong(College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China;School of Engineering and Computer Science, University of Hull, Hull,5.7RX,UK)

机构地区：[1]太原理工大学土木工程学院,太原030024 [2]赫尔大学工程与计算机科学学院,英国赫尔5.7RX

出　　处：《太原理工大学学报》2020年第3期396-403,共8页Journal of Taiyuan University of Technology

基　　金：国家重点研发计划基金资助项目(2016YFE0133300-04)。

摘　　要：为了探究侧面进风逆流式露点蒸发冷却器的结构参数对其性能的影响,建立了描述冷却器内热湿传递过程的二维数值模型,对不同入口长度、通道宽度、通道长度以及不同通道长度与入口长度之比条件下,冷却器的出口温度、湿球效率和露点效率进行了分析比较。结果表明:随着入口长度的增加,冷却器的冷却效率先增加后降低;当入口长度小于0.15 m时,冷却器出口温度随通道宽度的增大而升高;当入口长度大于0.15 m时,出口温度随通道宽度的增大先降低后升高;增加通道长度以及通道长度与入口长度之比可提高冷却效率,通道长度与入口长度之比建议控制在3到5之间。研究结果可为优化侧面进风逆流露点蒸发冷却器的结构参数,提高冷却器的冷却效率提供理论指导。In order to investigate the influence of the structural parameters of counter flow dew point evaporative cooler with side inlet on its performance,a two-dimensional numerical model describing the heat and moisture transfer process in the cooler was established.The outlet temperature,wet bulb efficiency and dew point efficiency of the cooler under different inlet length,channel width,channel length,and different ratio of channel length to inlet length were analyzed and compared.The results show that as the inlet length increases,the cooling efficiency of the cooler increases first and then decreases.When the inlet length is less than 0.15 m,the outlet temperature increases with the increase of the channel width.When the inlet length is greater than 0.15 m,the outlet temperature decreases first and then increases with the increase of the channel width.Increasing the channel length and ratio of channel length to inlet length can improve the cooling efficiency,and the ratio of channel length to inlet length is recommended to be controlled between 3 and 5.The results can provide theoretical guidance for optimizing the structure parameters of the counter flow dew point evaporative cooler with side inlet and improving the cooling efficiency of the cooler.

关 键 词：露点蒸发冷却 热湿交换 数值模拟 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]