Experimental and numerical investigation of a high-efficiency dew-point evaporative cooler

被引:56
作者
Liu, Yuting [1 ]
Akhlaghi, Yousef Golizadeh [2 ]
Zhao, Xudong [2 ]
Li, Junming [1 ]
机构
[1] Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China
[2] Univ Hull, Sch Engn, Kingston Upon Hull HU6 7RX, N Humberside, England
基金
欧盟地平线“2020”; 国家重点研发计划; 英国工程与自然科学研究理事会;
关键词
Dew-point; Evaporative cooler; Experimental study; Numerical study; Optimization; M-CYCLE HEAT; COUNTER-FLOW; COOLING SYSTEM; PERFORMANCE; EXCHANGERS; OPTIMIZATION;
D O I
10.1016/j.enbuild.2019.05.038
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper investigated the cooling performance of a high-efficiency dew-point evaporative cooler with optimised air and water flow arrangement using the combined experimental and numerical simulation method. The experimental results showed that the wet-bulb efficiency of the dew-point evaporative cooler was increased by 29.3% and COP was increased by 34.6%, compared to the existing commercial dew point air cooler of the same capacity. An improved two-dimensional, multi-factor engaged numerical model which can scale up and optimize the size and capacity of the cooler was developed. The numerical predictions agreed well with the experimental results, indicating that the cooling rate of the dew-point evaporative cooler is influenced by the dew-point evaporative cooler structure. The cooling efficiency of the dew-point evaporative cooler with corrugated plates is more than 10% higher than with flat plates and the cooling efficiency of the dew-point evaporative cooler with the actual flow arrangement is only 62%-67% that of a dew-point evaporative cooler with an ideal counter-flow arrangement. The cooling efficiency can be improved by increasing the channel length and the air entrance length, and decreasing the channel width and channel gap within a reasonable range. Crown Copyright (C) 2019 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:120 / 130
页数:11
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