Unsteady-state analysis of a counter-flow dew point evaporative cooling system

被引：40
作者：
Lin, J. [1 ]
Thu, K. [1 ,2 ]
Bui, T. D. [1 ]
Wang, R. Z. [3 ]
Ng, K. C. [1 ,4 ]
Kumja, M. [1 ]
Chua, K. J. [1 ]
机构：
[1] Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117575, Singapore
[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Kasuga Koen 6-1, Kasuga, Fukuoka 8168580, Japan
[3] Shanghai Jiao Tong Univ, Inst Refrigerat & Cryogen, Shanghai 200240, Peoples R China
[4] 4700 King Abdullah Univ Sci & Technol, Water Desalinat & Reuse Ctr, Thuwal 239556900, Saudi Arabia
来源：
ENERGY | 2016年 / 113卷
基金：
新加坡国家研究基金会;
关键词：
Dew point evaporative cooling; Transient response; Settling time; Dynamic performance; TUBE HEAT-EXCHANGER; COOLER; ENERGY; MODEL; CYCLE; CONFIGURATION; BUILDINGS; DESICCANT; EFFICIENT;
D O I：
10.1016/j.energy.2016.07.036
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Understanding the dynamic behavior of the dew point evaporative cooler is crucial in achieving efficient cooling for real applications. This paper details the development of a transient model for a counter-flow dew point evaporative cooling system. The transient model approaching steady conditions agreed well with the steady state model. Additionally, it is able to accurately predict the experimental data within 43% discrepancy. The transient responses of the cooling system were investigated under different inlet air conditions. Temporal temperature and humidity profiles were analyzed for different transient and step responses. The key findings from this study include: (1) the response trend and settling time is markedly dependent on the inlet air temperature, humidity and velocity; (2) the settling time of the transient response ranges from 50 s to 300 s when the system operates under different inlet conditions; and (3) the average transient wet bulb effectiveness (1.00-1.06) of the system is observed to be higher than the steady state wet bulb effectiveness (1.01) for our range of study. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：172 / 185
页数：14
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