A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach

The purpose of this study is to identify effectiveness of local exhaust ventilation (LEV) systems and to validate computational fluid dynamics (CFD) simulation results with actual experimental results. Three case studies had been conducted at Ventilation Laboratory in National Institute of Occupa...

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Main Author:	Ng, Chee Seng
Format:	Thesis
Language:	English English English
Published:	2013
Subjects:	TH Building construction
Online Access:	http://eprints.uthm.edu.my/1999/1/24p%20NG%20CHEE%20SENG.pdf http://eprints.uthm.edu.my/1999/2/NG%20CHEE%20SENG%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1999/3/NG%20CHEE%20SENG%20WATERMARK.pdf
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record_format	uketd_dc
spelling	my-uthm-ep.19992021-10-14T05:54:08Z A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach 2013-12 Ng, Chee Seng TH Building construction TH7005-7699 Heating and ventilation. Air conditioning The purpose of this study is to identify effectiveness of local exhaust ventilation (LEV) systems and to validate computational fluid dynamics (CFD) simulation results with actual experimental results. Three case studies had been conducted at Ventilation Laboratory in National Institute of Occupational Safety and Health (NIOSH) Bangi, Welding Laboratory and Thermal Environmental Laboratory in Universiti Tun Hussein Onn Malaysia (UTHM). LEV is a ventilation system that captures contaminants, for example dusts, mists, gases, vapours or fumes out from workstations, so that they can‟t be breathed by occupants. Employers allocate and install LEV in order to protect occupants‟ exposure to contaminants, but it doesn‟t work properly. To overcome this issue, Guidelines on Occupational Safety and Health for Design, Inspection, Testing and Examination of LEV system and CFD can be implemented. The guideline stated that the recommended minimum hood velocity is 100 ft/min; while the recommended velocity along ducts for vapours, gases, smoke is 1000 ft/min and 2000 ft/min is required for welding. It was found that Ventilation Laboratory in NIOSH Bangi using Control Speed of 80%, Welding Laboratory and Thermal Environmental Laboratory in UTHM met all the minimum requirements set by the guideline, where LEV systems are effective to be used. In terms of CFD modeling, upon validation, average absolute error obtained from three case studies ranges from 2.804% and 4.862%. Validity of CFD modeling is acceptable, which is less than 5% and good agreement is achieved between actual experimental results and CFD simulation results. Therefore, it can be concluded that simple CFD modeling can be performed as a tool to simulate air velocity in LEV system, which saves labour costs and time consumption when it is used during earliest stage of LEV design development prior to actual construction. The outcome of this study can be used as a benchmark or guideline for training facilities building equipped with LEV system to protect occupants‟ health. 2013-12 Thesis http://eprints.uthm.edu.my/1999/ http://eprints.uthm.edu.my/1999/1/24p%20NG%20CHEE%20SENG.pdf text en public http://eprints.uthm.edu.my/1999/2/NG%20CHEE%20SENG%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/1999/3/NG%20CHEE%20SENG%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Malaysia Fakulti Kejuruteraan Mekanikal dan Pembuatan
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TH Building construction TH Building construction
spellingShingle	TH Building construction TH Building construction Ng, Chee Seng A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach
description	The purpose of this study is to identify effectiveness of local exhaust ventilation (LEV) systems and to validate computational fluid dynamics (CFD) simulation results with actual experimental results. Three case studies had been conducted at Ventilation Laboratory in National Institute of Occupational Safety and Health (NIOSH) Bangi, Welding Laboratory and Thermal Environmental Laboratory in Universiti Tun Hussein Onn Malaysia (UTHM). LEV is a ventilation system that captures contaminants, for example dusts, mists, gases, vapours or fumes out from workstations, so that they can‟t be breathed by occupants. Employers allocate and install LEV in order to protect occupants‟ exposure to contaminants, but it doesn‟t work properly. To overcome this issue, Guidelines on Occupational Safety and Health for Design, Inspection, Testing and Examination of LEV system and CFD can be implemented. The guideline stated that the recommended minimum hood velocity is 100 ft/min; while the recommended velocity along ducts for vapours, gases, smoke is 1000 ft/min and 2000 ft/min is required for welding. It was found that Ventilation Laboratory in NIOSH Bangi using Control Speed of 80%, Welding Laboratory and Thermal Environmental Laboratory in UTHM met all the minimum requirements set by the guideline, where LEV systems are effective to be used. In terms of CFD modeling, upon validation, average absolute error obtained from three case studies ranges from 2.804% and 4.862%. Validity of CFD modeling is acceptable, which is less than 5% and good agreement is achieved between actual experimental results and CFD simulation results. Therefore, it can be concluded that simple CFD modeling can be performed as a tool to simulate air velocity in LEV system, which saves labour costs and time consumption when it is used during earliest stage of LEV design development prior to actual construction. The outcome of this study can be used as a benchmark or guideline for training facilities building equipped with LEV system to protect occupants‟ health.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Ng, Chee Seng
author_facet	Ng, Chee Seng
author_sort	Ng, Chee Seng
title	A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach
title_short	A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach
title_full	A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach
title_fullStr	A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach
title_full_unstemmed	A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach
title_sort	study of the effectiveness of local exhaust ventilation (lev) in training facilities building using computational fluid dynamics (cfd) approach
granting_institution	Universiti Tun Hussein Malaysia
granting_department	Fakulti Kejuruteraan Mekanikal dan Pembuatan
publishDate	2013
url	http://eprints.uthm.edu.my/1999/1/24p%20NG%20CHEE%20SENG.pdf http://eprints.uthm.edu.my/1999/2/NG%20CHEE%20SENG%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1999/3/NG%20CHEE%20SENG%20WATERMARK.pdf
_version_	1747830896341286912

A study of the effectiveness of local exhaust ventilation (LEV) in training facilities building using computational fluid dynamics (CFD) approach

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