Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs

Double skin ventilated roof is one of the important passive cooling techniques that aims to reduce solar heat gain through roofs by reducing both the conduction and convection heat transfer from the roof to the ceiling of buildings. On the other hand, radiant barrier system (RBS) is very powerful i...

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Autores principales:	Mohannad R. Ghanim, Sabah T. Ahmed
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2020
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/0cf8e55809804b65a927741489e0adf5
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spelling	oai:doaj.org-article:0cf8e55809804b65a927741489e0adf52021-12-02T11:50:21ZSelection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs1818-11712312-0789https://doaj.org/article/0cf8e55809804b65a927741489e0adf52020-03-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/696https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 Double skin ventilated roof is one of the important passive cooling techniques that aims to reduce solar heat gain through roofs by reducing both the conduction and convection heat transfer from the roof to the ceiling of buildings. On the other hand, radiant barrier system (RBS) is very powerful in blocking the radiation heat transfer between the two skins. In this research,the effect of placing a thin layer of aluminium foil at different locations on the thermal insulation performance of a double skin ventilated roof model is investigated experimentally and the optimum location that transmits less heat flux from the lower skinis specified.The model is made of two parallel inclined galvanized steel plates. Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq.The radiant barrierisapplied alternately, on the outer surface of the upper skin, on the inner surface of the upper skin, suspended in the airgap between the skins, and on the inner surface of the lower skin.These casesareconsidered as Model A, Model B, Model C, and Model D, respectively. It is found that the radiant barrier can block up to78% of the heat in Model A, 71% in Model B, 94% in Model C, and 91% in Model D as compared with the Basic Model.Since the radiant barrierin both Model C and Model D blocks almost the same amount of heat, the location of the radiant barrierin Model D is chosen as the optimumradiant barrierlocation because this model is more practical. Mohannad R. GhanimSabah T. AhmedAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 12, Iss 1 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Mohannad R. Ghanim Sabah T. Ahmed Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs
description	Double skin ventilated roof is one of the important passive cooling techniques that aims to reduce solar heat gain through roofs by reducing both the conduction and convection heat transfer from the roof to the ceiling of buildings. On the other hand, radiant barrier system (RBS) is very powerful in blocking the radiation heat transfer between the two skins. In this research,the effect of placing a thin layer of aluminium foil at different locations on the thermal insulation performance of a double skin ventilated roof model is investigated experimentally and the optimum location that transmits less heat flux from the lower skinis specified.The model is made of two parallel inclined galvanized steel plates. Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq.The radiant barrierisapplied alternately, on the outer surface of the upper skin, on the inner surface of the upper skin, suspended in the airgap between the skins, and on the inner surface of the lower skin.These casesareconsidered as Model A, Model B, Model C, and Model D, respectively. It is found that the radiant barrier can block up to78% of the heat in Model A, 71% in Model B, 94% in Model C, and 91% in Model D as compared with the Basic Model.Since the radiant barrierin both Model C and Model D blocks almost the same amount of heat, the location of the radiant barrierin Model D is chosen as the optimumradiant barrierlocation because this model is more practical.
format	article
author	Mohannad R. Ghanim Sabah T. Ahmed
author_facet	Mohannad R. Ghanim Sabah T. Ahmed
author_sort	Mohannad R. Ghanim
title	Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs
title_short	Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs
title_full	Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs
title_fullStr	Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs
title_full_unstemmed	Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs
title_sort	selection of optimumradiant barrier system (rbs) location in double skin ventilated roofs
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2020
url	https://doaj.org/article/0cf8e55809804b65a927741489e0adf5
work_keys_str_mv	AT mohannadrghanim selectionofoptimumradiantbarriersystemrbslocationindoubleskinventilatedroofs AT sabahtahmed selectionofoptimumradiantbarriersystemrbslocationindoubleskinventilatedroofs
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Selection of OptimumRadiant Barrier System (RBS) Location in Double Skin Ventilated Roofs

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