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Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]

The objective of this study is to investigate the effect of venturi-shaped roof angle on air change rate (ACH) of a stairwell. Computational Fluid Dynamics (CFD) analysis was conducted to perform the analysis of ACH of a stairwell in a tropical educational institution. A geometrical representation o...

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Main Authors: Lip, Kean Moey, Adam, Nor Mariah, Ahmad, Kamarul Arifin
Format: Article
Language:English
Published: Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) 2017
Subjects:
TJ Mechanical engineering and machinery
Machine design and drawing
Machine construction (General)
Online Access:http://ir.uitm.edu.my/id/eprint/39148/1/39148.pdf
http://ir.uitm.edu.my/id/eprint/39148/
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spelling my.uitm.ir.391482020-12-17T04:12:52Z http://ir.uitm.edu.my/id/eprint/39148/ Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.] Lip, Kean Moey Adam, Nor Mariah Ahmad, Kamarul Arifin TJ Mechanical engineering and machinery Machine design and drawing Machine construction (General) The objective of this study is to investigate the effect of venturi-shaped roof angle on air change rate (ACH) of a stairwell. Computational Fluid Dynamics (CFD) analysis was conducted to perform the analysis of ACH of a stairwell in a tropical educational institution. A geometrical representation of the experimental dimension was recreated in the CFD simulation. The experimental investigation was carried out using an open circuit low speed wind tunnel for validation purpose. Two k-ε turbulent models were evaluated namely RNG k-ε model and standard k-ε model. It was found that RNG k-ε model closely resembled the trend of those obtained from wind tunnel experiments. Good correlation between the numerical and experimental results was observed (less than 8% average difference). Furthermore, it was found that when the roof angle increased from 40˚ to 50˚, the average ACH was increased by 72%. It was also observed that the indoor speed at level 4 dropped for roof angle below 23˚. This certainly is an indicator to promote more studies to investigate the roof design configuration for better natural ventilation into buildings, which is in line with Malaysia’s government vision of sustainable energy for all and a greener Malaysia. Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) 2017 Article PeerReviewed text en http://ir.uitm.edu.my/id/eprint/39148/1/39148.pdf Lip, Kean Moey and Adam, Nor Mariah and Ahmad, Kamarul Arifin (2017) Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]. Journal of Mechanical Engineering (JMechE), SI 4 (4). pp. 135-150. ISSN 18235514
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic TJ Mechanical engineering and machinery
Machine design and drawing
Machine construction (General)
spellingShingle TJ Mechanical engineering and machinery
Machine design and drawing
Machine construction (General)
Lip, Kean Moey
Adam, Nor Mariah
Ahmad, Kamarul Arifin
Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]
description The objective of this study is to investigate the effect of venturi-shaped roof angle on air change rate (ACH) of a stairwell. Computational Fluid Dynamics (CFD) analysis was conducted to perform the analysis of ACH of a stairwell in a tropical educational institution. A geometrical representation of the experimental dimension was recreated in the CFD simulation. The experimental investigation was carried out using an open circuit low speed wind tunnel for validation purpose. Two k-ε turbulent models were evaluated namely RNG k-ε model and standard k-ε model. It was found that RNG k-ε model closely resembled the trend of those obtained from wind tunnel experiments. Good correlation between the numerical and experimental results was observed (less than 8% average difference). Furthermore, it was found that when the roof angle increased from 40˚ to 50˚, the average ACH was increased by 72%. It was also observed that the indoor speed at level 4 dropped for roof angle below 23˚. This certainly is an indicator to promote more studies to investigate the roof design configuration for better natural ventilation into buildings, which is in line with Malaysia’s government vision of sustainable energy for all and a greener Malaysia.
format Article
author Lip, Kean Moey
Adam, Nor Mariah
Ahmad, Kamarul Arifin
author_facet Lip, Kean Moey
Adam, Nor Mariah
Ahmad, Kamarul Arifin
author_sort Lip, Kean Moey
title Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]
title_short Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]
title_full Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]
title_fullStr Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]
title_full_unstemmed Effect of Venturi-Shaped Roof Angle on Air Change Rate of a Stairwell in Tropical Climate / Lip Kean Moey ...[et al.]
title_sort effect of venturi-shaped roof angle on air change rate of a stairwell in tropical climate / lip kean moey ...[et al.]
publisher Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM)
publishDate 2017
url http://ir.uitm.edu.my/id/eprint/39148/1/39148.pdf
http://ir.uitm.edu.my/id/eprint/39148/
_version_ 1687396747365580800
score 13.211869

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