Experimental investigation of a liquid desiccant dehumidification system integrated with shallow geothermal energy

Jyun-De Liang, Bo-Hao Huang, Yuan-Ching Chiang and Sih-Li Chen

Energy, 2020, vol. 191, issue C

Abstract: This study proposes a liquid desiccant dehumidification system combined with shallow geothermal energy. Calcium chloride solution is adopted as a desiccant that is sprayed directly on outdoor air for dehumidification purposes. Shallow geothermal energy is a clean renewable energy that is located beneath the ground surface approximately 3–50 m deep. In this study, the shallow geothermal energy water is utilized as a substitute for chilled water or cooling water. Shallow geothermal energy water, at about 20–22 °C, could precool outdoor air and cool the desiccant solution. Precooling outdoor air before it enters the dehumidifier can remove a sensible cooling load in advance and increase the performance of the dehumidifier. Moreover, the lower temperature solution is beneficial for enhancing sensible, latent, and total heat transfer rates. Based on the calculated results, under the same operating conditions, compared to the condensation system and the traditional liquid desiccant dehumidification system, the proposed system saves 86% and 82%, respectively, on power consumption. Result shows that a liquid desiccant dehumidification system integrated with shallow geothermal energy is an effective approach to enhance dehumidification performance and cooling capacity.

Keywords: Liquid desiccant; Dehumidification system; Shallow geothermal energy; Solution temperature; Energy savings (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (13)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:191:y:2020:i:c:s0360544219321474

DOI: 10.1016/j.energy.2019.116452

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