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

journal contribution
posted on 2023-05-21, 15:48 authored by Lanbo LaiLanbo Lai, Xiaolin WangXiaolin Wang, Gholamreza KefayatiGholamreza Kefayati, Hu, E
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.

History

Publication title

Desalination: The International Journal on The Science and Technology of Desalting and Water Purification

Volume

550

Article number

116394

Number

116394

Pagination

1-13

ISSN

0011-9164

Department/School

School of Engineering

Publisher

Elsevier Science Bv

Place of publication

Po Box 211, Amsterdam, Netherlands, 1000 Ae

Rights statement

© 2023 Elsevier B.V. All rights reserved.

Repository Status

  • Restricted

Socio-economic Objectives

Energy systems and analysis

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