Reducing roof solar heat gain by using double-skin ventilated roofs
Joint Authors
Ghanim, Muhannad R.
Ahmad, Sabah Tariq
Source
Engineering and Technology Journal
Issue
Vol. 38, Issue 3A (31 Mar. 2020), pp.402-411, 10 p.
Publisher
Publication Date
2020-03-31
Country of Publication
Iraq
No. of Pages
10
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
Abstract EN
Double skin ventilated roof is one of the important passive cooling techniques to reduce solar heat gain through roofs.
In this research, an experimental study was performed to investigate the thermal behaviour of a double skin roof model.
The model was made of two parallel galvanized steel plates.
Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq.
The effect of inclination angle (ϴ) from the horizontal and the spacing (S) between the plates was investigated at different radiation intensities.
It is found that using a double skin roof arrangement with a sufficient air gap (S) can reduce the heat gain significantly.
The higher the inclination angle (ϴ) the higher the ventilation rate, the lower the heat gain through the roof.
In this study, increasing the air gap from 2 cm to 4 cm reduced the heat gain significantly but when the gap was further increased to 6 cm, the reduction in the heat flux was insignificant.
A dimensionless correlation was also reduced between Nusselt number () and the single parameter where L is the channel length.
This correlation can be handily utilized for designing of engineering applications dealing with high temperature difference natural convection heat transfer.
American Psychological Association (APA)
Ghanim, Muhannad R.& Ahmad, Sabah Tariq. 2020. Reducing roof solar heat gain by using double-skin ventilated roofs. Engineering and Technology Journal،Vol. 38, no. 3A, pp.402-411.
https://search.emarefa.net/detail/BIM-948662
Modern Language Association (MLA)
Ghanim, Muhannad R.& Ahmad, Sabah Tariq. Reducing roof solar heat gain by using double-skin ventilated roofs. Engineering and Technology Journal Vol. 38, no. 3A (2020), pp.402-411.
https://search.emarefa.net/detail/BIM-948662
American Medical Association (AMA)
Ghanim, Muhannad R.& Ahmad, Sabah Tariq. Reducing roof solar heat gain by using double-skin ventilated roofs. Engineering and Technology Journal. 2020. Vol. 38, no. 3A, pp.402-411.
https://search.emarefa.net/detail/BIM-948662
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 410-411
Record ID
BIM-948662