Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/126722
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Type: Journal article
Title: A liquid desiccant enhanced two stage evaporative cooling system-development and performance evaluation of a test rig
Author: Rafique, M.M.
Rehman, S.
Alhems, L.M.
Shakir, M.A.
Citation: Energies, 2018; 11(1):72-1-72-1
Publisher: MDPI
Issue Date: 2018
ISSN: 1996-1073
1996-1073
Statement of
Responsibility: 
M. Mujahid Rafique, Shafiqur Rehman, Luai M. Alhems and Muhammad Ali Shakir
Abstract: Desiccant technology is found to be a good alternative to conventional cooling systems. It can provide better thermal comfort under hot and humid climatic conditions. The major component of a liquid desiccant cooling system is the desiccant dehumidifier which controls the latent cooling load. In this paper, a newly developed liquid desiccant enhanced evaporative cooling system has been tested experimentally. The effects of ambient conditions and other parameters on the performance of the system are investigated. The system performance curves which help to determine the air outlet conditions and coefficient of performance (COP) of the system are drawn for a wide range of ambient air humidity ratios (0.010–0.026 kg/kg), ambient air temperature (25–40 °C), process air flow rate (1.5–8.0 kg/m2·s), regeneration air flow rate (1.5–4.5 kg/m2·s), and regeneration temperature (55–85 °C). The results showed that better supply air conditions are achieved for hot and humid climatic conditions with effectiveness of the system largely dependent on process and regeneration air flow rates, regeneration temperature, and humidity ratio of process air. The dehumidification performance is increased by 62% for a change of ambient air humidity ratio from 0.01 to 0.025 kg/kg. The thermal coefficient of performance improved by 50% for the above variation in humidity ratio. This shows that such thermally activated systems are feasible options for hot and humid climatic conditions as indicated by better performance under these conditions.
Keywords: Liquid desiccant; evaporative cooler; air conditioning; rotary dehumidifier; sustainable development
Rights: © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
DOI: 10.3390/en11010072
Published version: http://dx.doi.org/10.3390/en11010072
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