Performance of horizontal light pipe for daylighting in high-rise office building in tropical region

Deep open-plan design is common in high-rise office building due to economic profits. Daylight, which has benefits for energy conservation and both human physiology and psychology; however, is unable to reach the deep area of the office through side windows causing the dependency on electrical light...

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Main Author:	Heng, Christopher Yii Sern
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TH Building construction
Online Access:	http://eprints.utm.my/id/eprint/79593/1/ChristopherYiiSernPFAB2017.pdf
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spelling	my-utm-ep.795932018-10-31T13:00:24Z Performance of horizontal light pipe for daylighting in high-rise office building in tropical region 2017 Heng, Christopher Yii Sern TH Building construction Deep open-plan design is common in high-rise office building due to economic profits. Daylight, which has benefits for energy conservation and both human physiology and psychology; however, is unable to reach the deep area of the office through side windows causing the dependency on electrical lighting. Therefore, this study discourses the usage of light distribution systems, particularly light pipe (LP), to provide illumination in a deep open-plan office in tropical climate. It also focuses on south-facing facade which is the most potential orientation for LP due to the sun position of Johor Bahru that is above the Equator line (latitude of 1o 3’ N and longitude of 103o 37’ E). Most of the previous research was done in temperate climate where the sun position is different from tropical region and focuses on the collector and extractor of LP. The emphasis of this research is on the daylighting performance of the various shapes of transporter and numbers of opening. Nine (9) LP transporters with different numbers of side and a base case were assessed using computer simulation software, Integrated Environment Solution: Virtual Environment (IESVE) that was validated with physical scaled model experiment. Simulations were carried out under overcast sky and intermediate sky with sun condition. The results showed that all the LP cases improve the daylighting performance of an empty open-plan office room. Semi-circle transporter with two openings, which has 14% lesser surface area than a typical rectangular transporter, shows the best performance both quantitatively and qualitatively. This helps to save cost in terms of material usage and creates additional spaces for wiring and ducting in the plenum. This study also concluded that the shape of LP transporter affects the efficiency of LP while the influence of the number of polygon sides and height of the sides without altering the overall height of the transporter are not significant. Thus, the findings of this study promote the usage of LP in deep open-plan high-rise office buildings by proposing design recommendations and guides for building designers. 2017 Thesis http://eprints.utm.my/id/eprint/79593/ http://eprints.utm.my/id/eprint/79593/1/ChristopherYiiSernPFAB2017.pdf application/pdf en public phd doctoral Universiti Teknologi Malaysia, Faculty of Built Environment Faculty of Built Environment
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TH Building construction
spellingShingle	TH Building construction Heng, Christopher Yii Sern Performance of horizontal light pipe for daylighting in high-rise office building in tropical region
description	Deep open-plan design is common in high-rise office building due to economic profits. Daylight, which has benefits for energy conservation and both human physiology and psychology; however, is unable to reach the deep area of the office through side windows causing the dependency on electrical lighting. Therefore, this study discourses the usage of light distribution systems, particularly light pipe (LP), to provide illumination in a deep open-plan office in tropical climate. It also focuses on south-facing facade which is the most potential orientation for LP due to the sun position of Johor Bahru that is above the Equator line (latitude of 1o 3’ N and longitude of 103o 37’ E). Most of the previous research was done in temperate climate where the sun position is different from tropical region and focuses on the collector and extractor of LP. The emphasis of this research is on the daylighting performance of the various shapes of transporter and numbers of opening. Nine (9) LP transporters with different numbers of side and a base case were assessed using computer simulation software, Integrated Environment Solution: Virtual Environment (IESVE) that was validated with physical scaled model experiment. Simulations were carried out under overcast sky and intermediate sky with sun condition. The results showed that all the LP cases improve the daylighting performance of an empty open-plan office room. Semi-circle transporter with two openings, which has 14% lesser surface area than a typical rectangular transporter, shows the best performance both quantitatively and qualitatively. This helps to save cost in terms of material usage and creates additional spaces for wiring and ducting in the plenum. This study also concluded that the shape of LP transporter affects the efficiency of LP while the influence of the number of polygon sides and height of the sides without altering the overall height of the transporter are not significant. Thus, the findings of this study promote the usage of LP in deep open-plan high-rise office buildings by proposing design recommendations and guides for building designers.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Heng, Christopher Yii Sern
author_facet	Heng, Christopher Yii Sern
author_sort	Heng, Christopher Yii Sern
title	Performance of horizontal light pipe for daylighting in high-rise office building in tropical region
title_short	Performance of horizontal light pipe for daylighting in high-rise office building in tropical region
title_full	Performance of horizontal light pipe for daylighting in high-rise office building in tropical region
title_fullStr	Performance of horizontal light pipe for daylighting in high-rise office building in tropical region
title_full_unstemmed	Performance of horizontal light pipe for daylighting in high-rise office building in tropical region
title_sort	performance of horizontal light pipe for daylighting in high-rise office building in tropical region
granting_institution	Universiti Teknologi Malaysia, Faculty of Built Environment
granting_department	Faculty of Built Environment
publishDate	2017
url	http://eprints.utm.my/id/eprint/79593/1/ChristopherYiiSernPFAB2017.pdf
_version_	1747818264340201472

Performance of horizontal light pipe for daylighting in high-rise office building in tropical region

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