Performance enhancement of a desiccant evaporative cooling system using direct/indirect evaporative cooler

被引：45
|
作者：
Elgendy, E. [1 ]
Mostafa, A. [1 ]
Fatouh, M. [1 ]
机构：
[1] Helwan Univ, Fac Engn El Mattaria, Dept Power Mech Engn, Cairo, Egypt
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2015年 / 51卷
关键词：
Desiccant evaporative cooler; Air conditioning; Exergy; Hot and humid climate; Desiccant wheel; 1ST;
D O I：
10.1016/j.ijrefrig.2014.12.009
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this paper, three novel desiccant evaporative cooling system configurations are proposed, simulated and compared with the conventional system under a wide range of ambient air temperature (30: 40 degrees C) and humidity ratio (0.01: 0.02 kg(v) kg(a)(-1)). In configuration-I, a direct/indirect evaporative cooling is inserted before the rotating heat exchanger. However, it is inserted after the rotating heat exchanger for system configuration-II. In configuration-III, an extra direct/indirect evaporative cooling is added in an opposite manner. Validation results confirm that, simulation and experimental results are in a good agreement with average errors of 2.23 and 3.87% for ambient air temperature and humidity ratio, respectively. Energetic analysis revealed that configuration-I has the highest cooling capacity while configuration-III has the highest thermal COP and air handling COP. Exergetic efficiency of config-III is higher than the conventional system with 54% as average value over the range of ambient air humidity. (C) 2014 Elsevier Ltd and IIR. All rights reserved.
引用
收藏
页码：77 / 87
页数：11
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