Design and Energy Analysis of a Solar Desiccant Evaporative Cooling System with Built-In Daily Energy Storage

Fahid Riaz; Muhammad Abdul Qyyum; Awais Bokhari; Jiří Jaromír Klemeš; Muhammad Usman; Muhammad Asim; Muhammad Rizwan Awan; Muhammad Imran; Moonyong Lee

doi:10.3390/en14092429

Design and Energy Analysis of a Solar Desiccant Evaporative Cooling System with Built-In Daily Energy Storage

Fahid Riaz
, Muhammad Abdul Qyyum
, Awais Bokhari
, Jiří Jaromír Klemeš^*
, Muhammad Usman
, Muhammad Asim
, Muhammad Rizwan Awan
, Muhammad Imran
, Moonyong Lee

^*Corresponding author for this work

Mechanical, Biomedical & Design Engineering

Department of Mechanical Engineering, National University of Singapore, Singapore 117575, Singapore; Department of Mechanical Engineering, University of Engineering and Technology Lahore, Lahore 54000, Pakistan
School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Korea
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 (CUI), Lahore Campus, Punjab 54000, Pakistan
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 Mechanical Engineering, University of Engineering and Technology, GT Road, Lahore 54000, Pakistan
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
Department of Mechanical, Hydraulics and Aeronautics, Universitat Politechnicia De Catalunya (UPC), 08800 Barcelona, Spain

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

120 Downloads (Pure)

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.

Original language	English
Article number	2429
Journal	Energies
Volume	14
Issue number	9
DOIs	https://doi.org/10.3390/en14092429
Publication status	Published - 24 Apr 2021

Bibliographical note

© 2021 by the authors.
Licensee MDPI, Basel, Switzerland.
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Air conditioning
Cooling
Desiccant
Energy storage
Evaporative
Refrigeration
Solar

Access to Document

10.3390/en14092429Licence: CC BY 3.0

Design and Energy Analysis of a Solar Desiccant Evaporative
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Final published version, 6.91 MBLicence: CC BY 3.0

Cite this

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title = "Design and Energy Analysis of a Solar Desiccant Evaporative Cooling System with Built-In Daily Energy Storage",

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{\textquoteright} 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.",

keywords = "Air conditioning, Cooling, Desiccant, Energy storage, Evaporative, Refrigeration, Solar",

author = "Fahid Riaz and Qyyum, \{Muhammad Abdul\} and Awais Bokhari and Kleme{\v s}, \{Ji{\v r}{\'i} Jarom{\'i}r\} and Muhammad Usman and Muhammad Asim and Awan, \{Muhammad Rizwan\} and Muhammad Imran and Moonyong Lee",

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AU - Riaz, Fahid

AU - Qyyum, Muhammad Abdul

AU - Bokhari, Awais

AU - Klemeš, Jiří Jaromír

AU - Usman, Muhammad

AU - Asim, Muhammad

AU - Awan, Muhammad Rizwan

AU - Imran, Muhammad

AU - Lee, Moonyong

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PY - 2021/4/24

Y1 - 2021/4/24

N2 - 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.

AB - 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.

KW - Air conditioning

KW - Cooling

KW - Desiccant

KW - Energy storage

KW - Evaporative

KW - Refrigeration

KW - Solar

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IS - 9

M1 - 2429

ER -

Design and Energy Analysis of a Solar Desiccant Evaporative Cooling System with Built-In Daily Energy Storage

Abstract

Bibliographical note

UN SDGs

Keywords

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