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Experimental study on electro-thermal energy generated from bundle of inline powered tubes

Energy generated by laminar natural convection from an inclined bundle of cylinders subjected to a constant heat flux was studied experimentally. The test rig was designed to investigate bundle of five cylinders arranged in a form that the bundle has three cylinders in a column and three cylinders i...

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Main Authors: Mohammed K.G., Salman Y.K., Ahmed T.M.
Other Authors: 55348074700
Format: Article
Published: International Journals of Engineering and Sciences Publisher 2023
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spelling my.uniten.dspace-238552023-05-29T14:52:26Z Experimental study on electro-thermal energy generated from bundle of inline powered tubes Mohammed K.G. Salman Y.K. Ahmed T.M. 55348074700 15837821000 57202007128 Energy generated by laminar natural convection from an inclined bundle of cylinders subjected to a constant heat flux was studied experimentally. The test rig was designed to investigate bundle of five cylinders arranged in a form that the bundle has three cylinders in a column and three cylinders in a row and has constant both longitudinal (flow direction) and traversing cylinders spacing distances equal 5 D. The experiments cover RaL, D range varies from 5.06 x 104 to 1.08 x 105 and five angles of inclination 0 � (horizontal), 30 o, 45 o, 60 � and 90�. The variation of local surface temperature Tx, local heat transfer coefficient hx and average heat transfer coefficient hL with cylinder length are depicted for all cylinder orientations and empirical formulas for the variation average Nusselt number NuL, D with the Rayleigh number RaL,D are also presented for all bundle inclination angles and for each individual cylinder in the bundle. Results show that, for all inclination angles with the exception of the vertical and for present cylinders configuration and arrangement as mentioned above, an improvement in the heat transfer rate for second and third cylinders in a bundle column in comparison with first cylinder in the column and other two cylinders in row on the left and right sides of the second cylinder in the column (Three cylinders in the bundle behave as single cylinder showing no interference effect in the bundle). This improvement having a significant ultimate value in horizontal bundle, decreasing in a moderate rate between horizontal to 60o range and a sharp reduction in heat transfer between 60 � to 90 � (vertical orientation lowest heat transfer rate). Generally, the heat transfer process improving as the bundle moves from vertical to horizontal even when consider a situation for single cylinder. For a single horizontal cylinder, heat transfer results show a good agreement with previous work and a contradictory agreement for single vertical cylinder. Heat transfer results also show a good agreement with the available experimental and analytical works for a horizontal inline bundle. � IJENS. Final 2023-05-29T06:52:26Z 2023-05-29T06:52:26Z 2018 Article 2-s2.0-85046813780 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85046813780&partnerID=40&md5=636e3c9625f40e9c325de1cd758dc203 https://irepository.uniten.edu.my/handle/123456789/23855 18 2 130 140 International Journals of Engineering and Sciences Publisher Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
description Energy generated by laminar natural convection from an inclined bundle of cylinders subjected to a constant heat flux was studied experimentally. The test rig was designed to investigate bundle of five cylinders arranged in a form that the bundle has three cylinders in a column and three cylinders in a row and has constant both longitudinal (flow direction) and traversing cylinders spacing distances equal 5 D. The experiments cover RaL, D range varies from 5.06 x 104 to 1.08 x 105 and five angles of inclination 0 � (horizontal), 30 o, 45 o, 60 � and 90�. The variation of local surface temperature Tx, local heat transfer coefficient hx and average heat transfer coefficient hL with cylinder length are depicted for all cylinder orientations and empirical formulas for the variation average Nusselt number NuL, D with the Rayleigh number RaL,D are also presented for all bundle inclination angles and for each individual cylinder in the bundle. Results show that, for all inclination angles with the exception of the vertical and for present cylinders configuration and arrangement as mentioned above, an improvement in the heat transfer rate for second and third cylinders in a bundle column in comparison with first cylinder in the column and other two cylinders in row on the left and right sides of the second cylinder in the column (Three cylinders in the bundle behave as single cylinder showing no interference effect in the bundle). This improvement having a significant ultimate value in horizontal bundle, decreasing in a moderate rate between horizontal to 60o range and a sharp reduction in heat transfer between 60 � to 90 � (vertical orientation lowest heat transfer rate). Generally, the heat transfer process improving as the bundle moves from vertical to horizontal even when consider a situation for single cylinder. For a single horizontal cylinder, heat transfer results show a good agreement with previous work and a contradictory agreement for single vertical cylinder. Heat transfer results also show a good agreement with the available experimental and analytical works for a horizontal inline bundle. � IJENS.
author2 55348074700
author_facet 55348074700
Mohammed K.G.
Salman Y.K.
Ahmed T.M.
format Article
author Mohammed K.G.
Salman Y.K.
Ahmed T.M.
spellingShingle Mohammed K.G.
Salman Y.K.
Ahmed T.M.
Experimental study on electro-thermal energy generated from bundle of inline powered tubes
author_sort Mohammed K.G.
title Experimental study on electro-thermal energy generated from bundle of inline powered tubes
title_short Experimental study on electro-thermal energy generated from bundle of inline powered tubes
title_full Experimental study on electro-thermal energy generated from bundle of inline powered tubes
title_fullStr Experimental study on electro-thermal energy generated from bundle of inline powered tubes
title_full_unstemmed Experimental study on electro-thermal energy generated from bundle of inline powered tubes
title_sort experimental study on electro-thermal energy generated from bundle of inline powered tubes
publisher International Journals of Engineering and Sciences Publisher
publishDate 2023
_version_ 1806423237441093632
score 13.211869

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