ZHANG M, DU Z Y, HUA J, et al.Numerical simulation study on the heat and mass exchange performance of the new type counter flow dew point evaporative cooler[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(5):102-110.

doi:10.16186/j.cnki.1673-9787.2021110126

Received:2021/11/29

Revised:2022/02/03

Published:2023/09/25

Numerical simulation study on the heat and mass exchange performance of the new type counter flow dew point evaporative cooler

ZHANG Min, DU Zhenyu, HUA Jing, DING Zhenping

College of Civil Engineering，Taiyuan University of Technology，Taiyuan 030024，Shanxi，China

Abstract:In order to improve the non-uniformity of the air flow inside the counter flow dew point evaporative cooler，the article proposed a new structure of cooler in which a plenum chamber and a flow equalizing device were added below the original cooler.By establishing a two-dimensional model of the new type counter flow dew point evaporative cooler，the heat and moisture transfer process was numerically simulated，the speed and temperature distribution of the cooler before and after the improvement were compared，and the influence of inlet wind speed，the secondary/primary air volume ratio and channel length on the heat and mass exchange performance were further studied.The analysis results showed that the variation range of the primary air velocity unevenness in the new counter flow dew point evaporative cooler was 0.07~0.14，and its value was about one tenth of that of the improved pre-cooler.It indicateed that the primary air velocity field in the improved post-cooler was uniformly distributed，and the heat and moisture exchange space can be fully utilized，thereby improving the cooling efficiency.In addition，when the inlet wind speed was 2~3 m/s，the secondary/primary air volume ratio was 0.25~0.4，and the channel length was 1 m，the wet bulb efficiency of the cooler was above 115%，which had better cooling performance than the original counter-flow dew point evaporative cooler.

Key words:numerical simulation;dew-point evaporative cooler;counter flow;plenum chamber;flow equalizing device

新型逆流式露点蒸发冷却器热质交换性能的数值模拟研究_张敏.pdf