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Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids

Flat-plate solar collectors are one of the cleanest and most efficient heating systems available. Studies on the presence of covalently functionalized graphene (Gr) suspended in distilled water as operating fluids inside an indoor flat-plate solar collector (FPSC) were experimentally and theoretical...

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Main Authors:	Alawi, Omer A., Kamar, Haslinda Mohamed, Mallah, Abdul Rahman, Mohammed, Hussein A., Sabrudin, Mohd Aizad Sazrul, Newaz, Kazi Md Salim, Najafi, Gholamhassan, Yaseen, Zaher Mundher
Format:	Article
Published:	MDPI 2021
Subjects:	GE Environmental Sciences QH Natural history
Online Access:	http://eprints.um.edu.my/34024/
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spelling	my.um.eprints.340242022-06-27T05:07:22Z http://eprints.um.edu.my/34024/ Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids Alawi, Omer A. Kamar, Haslinda Mohamed Mallah, Abdul Rahman Mohammed, Hussein A. Sabrudin, Mohd Aizad Sazrul Newaz, Kazi Md Salim Najafi, Gholamhassan Yaseen, Zaher Mundher GE Environmental Sciences QH Natural history Flat-plate solar collectors are one of the cleanest and most efficient heating systems available. Studies on the presence of covalently functionalized graphene (Gr) suspended in distilled water as operating fluids inside an indoor flat-plate solar collector (FPSC) were experimentally and theoretically performed. These examinations were conducted under different testing conditions namely 0.025 wt.%, 0.05 wt.%, 0.075 wt.%, and 0.1 wt.%, 0.5, 1, and 1.5 kg/min, 30, 40, and 50 degrees C, and 500, 750, and 1000 W/m(2). Various techniques were used to characterize the functionalized nanofluids' stability and morphological properties namely UV/Vis spectrophotometry, EDX analysis with a Scanning Electron Microscope (SEM), zeta potential, and nanoparticle size. The results showed that the collected heat improved as the percentage of GrNPs and the fluid mass flow rates increased, although it decreased as the reduced temperature coefficient increased, whereas the maximum increase in collector efficiency at higher concentration was 13% and 12.5% compared with distilled water at 0.025 kg/s. Finally, a new correlation was developed for the base fluid and nanofluids' thermal efficiency as a function of dropped temperature parameter and weight concentration with 2.758% and 4.232% maximum deviations. MDPI 2021-05 Article PeerReviewed Alawi, Omer A. and Kamar, Haslinda Mohamed and Mallah, Abdul Rahman and Mohammed, Hussein A. and Sabrudin, Mohd Aizad Sazrul and Newaz, Kazi Md Salim and Najafi, Gholamhassan and Yaseen, Zaher Mundher (2021) Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids. Sustainability, 13 (10). ISSN 2071-1050, DOI https://doi.org/10.3390/su13105416 <https://doi.org/10.3390/su13105416>. 10.3390/su13105416
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	GE Environmental Sciences QH Natural history
spellingShingle	GE Environmental Sciences QH Natural history Alawi, Omer A. Kamar, Haslinda Mohamed Mallah, Abdul Rahman Mohammed, Hussein A. Sabrudin, Mohd Aizad Sazrul Newaz, Kazi Md Salim Najafi, Gholamhassan Yaseen, Zaher Mundher Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids
description	Flat-plate solar collectors are one of the cleanest and most efficient heating systems available. Studies on the presence of covalently functionalized graphene (Gr) suspended in distilled water as operating fluids inside an indoor flat-plate solar collector (FPSC) were experimentally and theoretically performed. These examinations were conducted under different testing conditions namely 0.025 wt.%, 0.05 wt.%, 0.075 wt.%, and 0.1 wt.%, 0.5, 1, and 1.5 kg/min, 30, 40, and 50 degrees C, and 500, 750, and 1000 W/m(2). Various techniques were used to characterize the functionalized nanofluids' stability and morphological properties namely UV/Vis spectrophotometry, EDX analysis with a Scanning Electron Microscope (SEM), zeta potential, and nanoparticle size. The results showed that the collected heat improved as the percentage of GrNPs and the fluid mass flow rates increased, although it decreased as the reduced temperature coefficient increased, whereas the maximum increase in collector efficiency at higher concentration was 13% and 12.5% compared with distilled water at 0.025 kg/s. Finally, a new correlation was developed for the base fluid and nanofluids' thermal efficiency as a function of dropped temperature parameter and weight concentration with 2.758% and 4.232% maximum deviations.
format	Article
author	Alawi, Omer A. Kamar, Haslinda Mohamed Mallah, Abdul Rahman Mohammed, Hussein A. Sabrudin, Mohd Aizad Sazrul Newaz, Kazi Md Salim Najafi, Gholamhassan Yaseen, Zaher Mundher
author_facet	Alawi, Omer A. Kamar, Haslinda Mohamed Mallah, Abdul Rahman Mohammed, Hussein A. Sabrudin, Mohd Aizad Sazrul Newaz, Kazi Md Salim Najafi, Gholamhassan Yaseen, Zaher Mundher
author_sort	Alawi, Omer A.
title	Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids
title_short	Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids
title_full	Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids
title_fullStr	Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids
title_full_unstemmed	Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids
title_sort	experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids
publisher	MDPI
publishDate	2021
url	http://eprints.um.edu.my/34024/
_version_	1738510702536032256
score	13.211869

Experimental and theoretical analysis of energy efficiency in a flat plate solar collector using monolayer graphene nanofluids

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