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

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

Abstract

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.

Metadata

Item Type: Article
Creators:
CreatorsEmail / ID. Num
Lip, Kean MoeyUNSPECIFIED
Adam, Nor MariahUNSPECIFIED
Ahmad, Kamarul ArifinUNSPECIFIED
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > Machine design and drawing
T Technology > TJ Mechanical engineering and machinery > Machine construction (General)
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
Journal: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 18235514
Volume: SI 4
Number: 4
Page Range: pp. 135-150
Item ID: 39148
Uncontrolled Keywords: Stairwell, Air Change Rate, Tropical Climate, CFD, Roof Angle
URI: http://ir.uitm.edu.my/id/eprint/39148

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