Ismail, Asmat
(2013)
Cooling Potential Of Passive Roof
Treatments On The Concrete Flat
Roof In Penang, Malaysia.
PhD thesis, Universiti Sains Malaysia.
Abstract
The rise in global temperature due to global warming has a major impact on
the environment and building occupants. The higher concentration of greenhouse
gases, in the atmosphere, especially carbon dioxide (CO2), is thought to be the reason
for this phenomenon. Higher outdoor and indoor air temperatures lead to higher
energy consumption in buildings due to the excessive use of air conditioning and
other mechanical ventilation systems. Implementing passive cooling systems into the
building elements can be a promising way to overcome this problem. From the
literature, passive cooling techniques using green roof, double roof, and reflective
roof (white roof) technologies could have a positive impact on the building
environment. However, the cooling potential of these technologies varies depending
on their design and the type of climate. Therefore, in order to investigate the
effectiveness of these technologies in the Malaysian climate, a comparative study of
these passive cooling technologies is carried out in this research. A series of field
experimental studies has been carried out on a real building, i.e., on the flat roof of a
single-storey residential building, in the actual weather conditions. The indoor and
outdoor environments were monitored in this research to evaluate the most effective
passive cooling roof treatment between the potted plant green roof (roof with potted
plants), double roof (roof with 6 inches ventilated air gap) and white roof. The results
show a significant cooling effect for all strategies. The highest indoor-outdoor air
temperature difference, which is the main criteria in determining the cooling effect,
is taken into account in this research.
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