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Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles

This work investigates the performance enhancement of a solar air heater using inclined impinging jets on the heater surface. Two main sets of arrangements are considered for the jet nozzles including the parallel and crossing orientation of nozzles in consecutive rows. The RNG k -epsilon model is e...

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Main Authors: Hai, Tao, Mansir, Ibrahim B., Alshuraiaan, Bader, Abed, Azher M., Ali, H. Elhosiny, Dahari, Mahidzal, Albalawi, Hind
Format: Article
Published: Elsevier 2023
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QC Physics
Online Access:http://eprints.um.edu.my/38402/
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spelling my.um.eprints.384022024-06-12T02:28:17Z http://eprints.um.edu.my/38402/ Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles Hai, Tao Mansir, Ibrahim B. Alshuraiaan, Bader Abed, Azher M. Ali, H. Elhosiny Dahari, Mahidzal Albalawi, Hind QC Physics This work investigates the performance enhancement of a solar air heater using inclined impinging jets on the heater surface. Two main sets of arrangements are considered for the jet nozzles including the parallel and crossing orientation of nozzles in consecutive rows. The RNG k -epsilon model is employed to simulate the turbulent flow in the channel. The influence of different geometrical and operational parameters such as jet diameter ratio (Dj /Dh), inclination angle (alpha, beta), stream wise pitch ratio (L /Dh), span wise pitch ratio (S /Dh), Re number and velocity ratio (Vr) on the hydraulic and thermal behavior of jet solar air heater was studied. Results showed that the proposed jet solar air heater improved the Nu number and thermohydraulic performance parameter compared to the conventional unimproved solar air heater. For the studied range of parameters, up to 4.26 times higher Nu number was obtained using the jet impingement compared to the smooth duct solar air heater. Moreover, it was shown that the amount of velocity ratio (Vr) is a significant factor when comparing the parallel and crossing orientations. Addi-tionally, results indicated that the increment of stream wise and span wise pitch led to the increment of the Nu number while having a minor effect on the friction factor. For example, the increment of L/dh from 0.3 to 0.6 leads to the reduction of f/fs of case 1 and case 4 by 6.5% and 1.09%, respectively Also, the increment of the jet diameter first raises the thermohydraulic performance parameter, and then with a further increment of diameter, the amount of thermo-hydraulic performance parameter decreases. Elsevier 2023-05 Article PeerReviewed Hai, Tao and Mansir, Ibrahim B. and Alshuraiaan, Bader and Abed, Azher M. and Ali, H. Elhosiny and Dahari, Mahidzal and Albalawi, Hind (2023) Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles. Case Studies in Thermal Engineering, 45. ISSN 2214-157X, DOI https://doi.org/10.1016/j.csite.2023.102913 <https://doi.org/10.1016/j.csite.2023.102913>. 10.1016/j.csite.2023.102913
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 QC Physics
spellingShingle QC Physics
Hai, Tao
Mansir, Ibrahim B.
Alshuraiaan, Bader
Abed, Azher M.
Ali, H. Elhosiny
Dahari, Mahidzal
Albalawi, Hind
Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles
description This work investigates the performance enhancement of a solar air heater using inclined impinging jets on the heater surface. Two main sets of arrangements are considered for the jet nozzles including the parallel and crossing orientation of nozzles in consecutive rows. The RNG k -epsilon model is employed to simulate the turbulent flow in the channel. The influence of different geometrical and operational parameters such as jet diameter ratio (Dj /Dh), inclination angle (alpha, beta), stream wise pitch ratio (L /Dh), span wise pitch ratio (S /Dh), Re number and velocity ratio (Vr) on the hydraulic and thermal behavior of jet solar air heater was studied. Results showed that the proposed jet solar air heater improved the Nu number and thermohydraulic performance parameter compared to the conventional unimproved solar air heater. For the studied range of parameters, up to 4.26 times higher Nu number was obtained using the jet impingement compared to the smooth duct solar air heater. Moreover, it was shown that the amount of velocity ratio (Vr) is a significant factor when comparing the parallel and crossing orientations. Addi-tionally, results indicated that the increment of stream wise and span wise pitch led to the increment of the Nu number while having a minor effect on the friction factor. For example, the increment of L/dh from 0.3 to 0.6 leads to the reduction of f/fs of case 1 and case 4 by 6.5% and 1.09%, respectively Also, the increment of the jet diameter first raises the thermohydraulic performance parameter, and then with a further increment of diameter, the amount of thermo-hydraulic performance parameter decreases.
format Article
author Hai, Tao
Mansir, Ibrahim B.
Alshuraiaan, Bader
Abed, Azher M.
Ali, H. Elhosiny
Dahari, Mahidzal
Albalawi, Hind
author_facet Hai, Tao
Mansir, Ibrahim B.
Alshuraiaan, Bader
Abed, Azher M.
Ali, H. Elhosiny
Dahari, Mahidzal
Albalawi, Hind
author_sort Hai, Tao
title Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles
title_short Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles
title_full Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles
title_fullStr Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles
title_full_unstemmed Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles
title_sort numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles
publisher Elsevier
publishDate 2023
url http://eprints.um.edu.my/38402/
_version_ 1805881106102222848
score 13.211869

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