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Analysis of a novel solid desiccant evaporative cooling system integrated with a humidification-dehumidification desalination unit

Citation

Lai, L and Wang, Xiaolin and Kefayati, G and Hu, E, Analysis of a novel solid desiccant evaporative cooling system integrated with a humidification-dehumidification desalination unit, Desalination: The International Journal on The Science and Technology of Desalting and Water Purification, 550 Article 116394. ISSN 0011-9164 (2023) [Refereed Article]


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DOI: doi:10.1016/j.desal.2023.116394

Abstract

A new configuration of a solid desiccant evaporative cooling system integrated with a humidification-dehumidification (HDH) desalination unit was proposed, and its performance was numerically evaluated. In the proposed system, the humid exhaust air from the desiccant wheel and M-cycle IEC was recycled and supplied to an HDH unit to improve the water production rate. Two operation modes were proposed depending on climate conditions. The system with two operation modes was evaluated under various operating conditions. A case study was performed under Australian climatic conditions. The results showed that Mode 1 had a better cooling performance than Mode 2, with a maximum cooling capacity of 4.76 kW. However, Mode 2 was more energy efficient, with an average COP of 0.71, as no regeneration heat was needed. With the HDH unit, the freshwater produced by the system could fully cover the water usage of the M-cycle IEC in both modes. When the heat source temperature of the HDH unit increased to 70 C, the water productivity of the system could reach 148.5 kg/h and 42.0 kg/h for Mode 1 and 2, respectively. The findings indicated that the proposed system had good potential for producing freshwater and cooling simultaneously.

Item Details

Item Type:Refereed Article
Keywords:Solid desiccant, Indirect evaporative cooling, Humidification-dehumidification desalination, TRNSYS, Air-conditioning
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Energy generation, conversion and storage (excl. chemical and electrical)
Objective Division:Energy
Objective Group:Energy storage, distribution and supply
Objective Field:Energy systems and analysis
UTAS Author:Lai, L (Mr Lanbo Lai)
UTAS Author:Wang, Xiaolin (Professor Xiaolin Wang)
UTAS Author:Kefayati, G (Dr Gholamreza Kefayati)
ID Code:154944
Year Published:2023
Deposited By:Engineering
Deposited On:2023-01-20
Last Modified:2023-01-20
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