Effects Of Window Design On Daylight Performance Of Residential Rooms In Malaysia

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dc.contributor.authorOmer Almualm, Adel Abdullah
dc.date.accessioned2017-02-28T01:44:58Z
dc.date.available2017-02-28T01:44:58Z
dc.date.issued2015-10
dc.description.abstractThe introduction of daylight in the interiors of residential buildings come with numerous benefits like promoting sustainability and energy savings, good health and psychological effects. This research is on the effects of window design on daylight performance in residential buildings in Malaysia. Day lighting standards and the Malaysian Uniform Building By Law (UBBL 1984 #39) are used as guidance; and the percentage daylight factor (%DF) is used as a method to represent daylight levels. The suitability and accuracy of the %DF method used under the real skies were confirmed when field work results showed near similar %DF values when compared to the Building Research Station protractors (BRS) and three other simulation software. The case study of residential rooms with varied window to floor area ratios (WFR) were studied with and without the effects from the externally reflected components (ERC). Strong correlations were found between the %DF to the WFR in both cases. The study found a reduction of 1 – 3% DF with ERC, and a target %DF between 1 – 2% is considered sufficient. In terms of WFR it is found that the 10% WFR as imposed by UBBL #39 can be further improvised when a 5% WFR is also sufficient to accommodate daylight requirements for residential rooms. Furthermore, an upper limit WFR of 25% is recommended. External shading decreases the %DF by about half when compared to without shading, and is recommended for rooms having a larger than 25% WFR.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/3786
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectWindow design on daylight performanceen_US
dc.subjectin residential buildings in Malaysia.en_US
dc.titleEffects Of Window Design On Daylight Performance Of Residential Rooms In Malaysiaen_US
dc.typeThesisen_US
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