LAPSE:2023.31893
Published Article
LAPSE:2023.31893
Design and Energy Analysis of a Solar Desiccant Evaporative Cooling System with Built-In Daily Energy Storage
April 19, 2023
Abstract
Heat storage with thermochemical (TC) materials is a promising technology for solar energy storage. In this paper, a solar-driven desiccant evaporative cooling (DEC) system for air-conditioning is proposed, which converts solar heat energy into cooling with built-in daily storage. The system utilises thermochemical heat storage along with the DEC technology in a unique way. Magnesium Chloride (MgCl2·6H2O) has been used, which serves as both a desiccant and a thermochemical heat storage medium. The system has been designed for the subtropical climate of Lahore, Pakistan, for a bedroom with 8 h of cooling requirements during the night. MATLAB has been employed for modelling the system. The simulation results show that 57 kg of magnesium chloride is sufficient to meet 98.8% of cooling demand for the entire month of July at an elevated cooling requirement. It was found that the cooling output of the system increased with increasing heat exchanger effectiveness. The heat exchangers’ effectiveness was increased from 0.7 to 0.8, with the solar fraction increased from 70.4% to 82.44%. The cooled air supplied to the building meets the fresh air requirements for proper ventilation.
Heat storage with thermochemical (TC) materials is a promising technology for solar energy storage. In this paper, a solar-driven desiccant evaporative cooling (DEC) system for air-conditioning is proposed, which converts solar heat energy into cooling with built-in daily storage. The system utilises thermochemical heat storage along with the DEC technology in a unique way. Magnesium Chloride (MgCl2·6H2O) has been used, which serves as both a desiccant and a thermochemical heat storage medium. The system has been designed for the subtropical climate of Lahore, Pakistan, for a bedroom with 8 h of cooling requirements during the night. MATLAB has been employed for modelling the system. The simulation results show that 57 kg of magnesium chloride is sufficient to meet 98.8% of cooling demand for the entire month of July at an elevated cooling requirement. It was found that the cooling output of the system increased with increasing heat exchanger effectiveness. The heat exchangers’ effectiveness was increased from 0.7 to 0.8, with the solar fraction increased from 70.4% to 82.44%. The cooled air supplied to the building meets the fresh air requirements for proper ventilation.
Record ID
Keywords
air conditioning, cooling, desiccant, Energy Storage, evaporative, refrigeration, solar
Subject
Suggested Citation
Riaz F, Qyyum MA, Bokhari A, Klemeš JJ, Usman M, Asim M, Awan MR, Imran M, Lee M. Design and Energy Analysis of a Solar Desiccant Evaporative Cooling System with Built-In Daily Energy Storage. (2023). LAPSE:2023.31893
Author Affiliations
Riaz F: Department of Mechanical Engineering, National University of Singapore, Singapore 117575, Singapore; Department of Mechanical Engineering, University of Engineering and Technology Lahore, Lahore 54000, Pakistan [ORCID]
Qyyum MA: School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Korea [ORCID]
Bokhari A: Sustainable Process Integration Laboratory−SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology−VUT Brno, Technická 2896/2, 616 69 Brno, Czech Republic; Department of Chemical Engineering, COMSATS University Islamabad [ORCID]
Klemeš JJ: Sustainable Process Integration Laboratory−SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology−VUT Brno, Technická 2896/2, 616 69 Brno, Czech Republic [ORCID]
Usman M: Department of Mechanical Engineering, University of Engineering and Technology Lahore, Lahore 54000, Pakistan
Asim M: Research Centre for Green Energy, Transport and Building (RCGETB), School of Professional Education and Executive Development, College of Professional & Continuing Education, The Hong Kong Polytechnic University, Kowloon 100077, Hong Kong [ORCID]
Awan MR: Department of Mechanical, Hydraulics and Aeronautics, Universitat Politechnicia De Catalunya (UPC), 08800 Barcelona, Spain
Imran M: School of Mechanical, Biomedical and Design Engineering, College of Engineering and Applied Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK [ORCID]
Lee M: School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Korea [ORCID]
Qyyum MA: School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Korea [ORCID]
Bokhari A: Sustainable Process Integration Laboratory−SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology−VUT Brno, Technická 2896/2, 616 69 Brno, Czech Republic; Department of Chemical Engineering, COMSATS University Islamabad [ORCID]
Klemeš JJ: Sustainable Process Integration Laboratory−SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology−VUT Brno, Technická 2896/2, 616 69 Brno, Czech Republic [ORCID]
Usman M: Department of Mechanical Engineering, University of Engineering and Technology Lahore, Lahore 54000, Pakistan
Asim M: Research Centre for Green Energy, Transport and Building (RCGETB), School of Professional Education and Executive Development, College of Professional & Continuing Education, The Hong Kong Polytechnic University, Kowloon 100077, Hong Kong [ORCID]
Awan MR: Department of Mechanical, Hydraulics and Aeronautics, Universitat Politechnicia De Catalunya (UPC), 08800 Barcelona, Spain
Imran M: School of Mechanical, Biomedical and Design Engineering, College of Engineering and Applied Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK [ORCID]
Lee M: School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Korea [ORCID]
Journal Name
Energies
Volume
14
Issue
9
First Page
2429
Year
2021
Publication Date
2021-04-24
ISSN
1996-1073
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PII: en14092429, Publication Type: Journal Article
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LAPSE:2023.31893
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https://doi.org/10.3390/en14092429
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