Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim

Increasing the use of natural daylight for lighting purposes in the buildings may offer savings in total building energy consumption. One technique of utilize the natural light is the use of light pipes that cannot only bring light into otherwise inaccessible or dimly lit places, but also improves t...

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Main Author:	Abdul Halim, Mohd Afzan
Format:	Thesis
Language:	English
Published:	2005
Subjects:	Electric lighting
Online Access:	https://ir.uitm.edu.my/id/eprint/76811/1/76811.pdf
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id	my-uitm-ir.76811
record_format	uketd_dc
spelling	my-uitm-ir.768112023-09-27T04:49:18Z Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim 2005 Abdul Halim, Mohd Afzan Electric lighting Increasing the use of natural daylight for lighting purposes in the buildings may offer savings in total building energy consumption. One technique of utilize the natural light is the use of light pipes that cannot only bring light into otherwise inaccessible or dimly lit places, but also improves the internal environment and visual comfort. This study aims to investigate the effectiveness of light pipe in reducing the temperature in an occupied space for Malaysian climate. The performance of light pipe was evaluated measuring the temperature and relative humidity for both indoor and outdoor simultaneously. The study was divided to four parts. In the first part, the experiment was conducted to measure the temperature and humidity inside the occupied space due to the transmitted daylight from light pipe alone. In the second part, the same measurements were carried out with the room was totally lighted by artificial light. Then the measurements were repeated for the measurement if temperature and humidity due to the daylight that enter through the openings (windows) and also the light pipe. In the final part, the room was lighted up only by daylight through openings. In all four cases, the air temperature and relative humidity for outdoor and indoor were measured simultaneously. Temperature differences and humidity differences between the outdoor and indoor were calculated and comparisons between cases were made. In general it was found that the day lighting transmitted via light pipe gives positive effect in reducing internal temperature and humidity inside the building. The results indicate that the day lighting from light pipe generates less heat compared to artificial lighting as could be observed from the higher indoor and outdoor temperature difference as measured in the first part of experiment. The internal relative humidity was also found to be relatively lower when the room was lighted by day lighting using light pipe compared to artificial light. 2005 Thesis https://ir.uitm.edu.my/id/eprint/76811/ https://ir.uitm.edu.my/id/eprint/76811/1/76811.pdf text en public degree Universiti Teknologi MARA (UiTM) Faculty of Mechanical Engineering Ahmed, Azni
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Ahmed, Azni
topic	Electric lighting
spellingShingle	Electric lighting Abdul Halim, Mohd Afzan Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim
description	Increasing the use of natural daylight for lighting purposes in the buildings may offer savings in total building energy consumption. One technique of utilize the natural light is the use of light pipes that cannot only bring light into otherwise inaccessible or dimly lit places, but also improves the internal environment and visual comfort. This study aims to investigate the effectiveness of light pipe in reducing the temperature in an occupied space for Malaysian climate. The performance of light pipe was evaluated measuring the temperature and relative humidity for both indoor and outdoor simultaneously. The study was divided to four parts. In the first part, the experiment was conducted to measure the temperature and humidity inside the occupied space due to the transmitted daylight from light pipe alone. In the second part, the same measurements were carried out with the room was totally lighted by artificial light. Then the measurements were repeated for the measurement if temperature and humidity due to the daylight that enter through the openings (windows) and also the light pipe. In the final part, the room was lighted up only by daylight through openings. In all four cases, the air temperature and relative humidity for outdoor and indoor were measured simultaneously. Temperature differences and humidity differences between the outdoor and indoor were calculated and comparisons between cases were made. In general it was found that the day lighting transmitted via light pipe gives positive effect in reducing internal temperature and humidity inside the building. The results indicate that the day lighting from light pipe generates less heat compared to artificial lighting as could be observed from the higher indoor and outdoor temperature difference as measured in the first part of experiment. The internal relative humidity was also found to be relatively lower when the room was lighted by day lighting using light pipe compared to artificial light.
format	Thesis
qualification_level	Bachelor degree
author	Abdul Halim, Mohd Afzan
author_facet	Abdul Halim, Mohd Afzan
author_sort	Abdul Halim, Mohd Afzan
title	Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim
title_short	Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim
title_full	Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim
title_fullStr	Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim
title_full_unstemmed	Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim
title_sort	investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in malaysian climate / mohd afzan abdul halim
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Mechanical Engineering
publishDate	2005
url	https://ir.uitm.edu.my/id/eprint/76811/1/76811.pdf
_version_	1783736123401437184

Investigation of the effectiveness of a light pipe in reducing temperature inside the occupied space in Malaysian climate / Mohd Afzan Abdul Halim

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