A Polygeneration System Based on Desiccant Air Conditioning Coupled with an Electrical Storage

Luis Gabriel Gesteira (), Javier Uche () and Natalia Dejo-Oricain
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Luis Gabriel Gesteira: Department of Mechanical Technology, Federal Institute of Bahia, Salvador 40301-015, Brazil
Javier Uche: CIRCE Research Institute, University of Zaragoza, 50018 Zaragoza, Spain
Natalia Dejo-Oricain: Department of Management and Business Administration, University of Zaragoza, 50009 Zaragoza, Spain

Sustainability, 2022, vol. 14, issue 23, 1-15

Abstract: This study presents an extension of a previous paper recently published by the authors. In particular, the current paper focuses on adding electrical storage to a polygeneration system developed for residential applications. Different from the previous work, it aims to design an off-grid facility. The polygeneration plant provides electricity, space heating and cooling, domestic hot water, and freshwater for a single-family dwelling in Almería, Spain. The main system technologies are photovoltaic/thermal collectors, reverse osmosis, and desiccant air conditioning. Lead-acid battery storage was added as a backup for the electrical system. The system was performed in the TRNSYS simulation environment for one year with a 5-min time step. A parametric study was carried out to investigate the grid dependence according to the number of batteries installed. Design optimization was also performed to provide the optimal system configuration for the off-grid case. A solar collector efficiency of 0.55 and a desiccant air-conditioning coefficient of performance of 0.42 were obtained. All demands were fully supplied, and the primary energy saving and CO 2 saving achieved 100%. A minimum battery state of charge of 30% was reached for a few hours all year long.

Keywords: polygeneration system; desiccant air conditioning; building; electrical storage; sustainability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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