THE EFFECTIVENESS OF RADIANT BARRIER AS REFLECTIVE INSULATION IN ROOFS OF RESIDENTIAL BUILDINGS IN TROPICAL CLIMATE

Nowadays, g)obaJ wawiog hav~ ~n an jnt~mational jssu~s and world
problem. Global warming happens due to the continuing rise in the average
temperature of Earth~s atmosphere and oceans. It is because of increased
concentrations of greenhouse gases in the atmosphere, resulting from human
activities such as deforestation and burning of fossil fuels. These activities
contribute to the C02 gasses emissions. Finding has made by IPCC SRES in year
1990 to 2010, the caroon emission increased by year from 21 to 31 (billion tons per
year). In order to reduce the heat, a few campaign was conduct and rehabilitation
work been done. Every sector in industries especially in building construction they
also contribute to the gasses emission by energy consumed by human for living and
working.
Based on case study, buildings consume one-third of the world energy and
worldwide building energy consumption is expected to grow by 45% from year
2002 to year 2025. As in tropical countries experience high levels of heat radiation
from the sun and leads to discomfort to humans and surroundings. Air conditioning
is widely used to encounter this problem, which consumes high levels of energy.
Therefore, this research aims to quantity the reduction in indoor temperature and to
verity the positive effect of installing reflective insulation in roofs on indoor
parameters. The research methodology consist of I) construction of 2 down -scale
model of experimental house (600 x 600 x 500mm) to study the effect of reflective
insulation of indoor temperature and 2) insulation material 3) Roof color and 4 ) the
house allocated. Data collection is conducted every hour from Sam to 5pm for seven
days. The result shows that the insulated houses quantify the most reduction with
37.69"/o and the reduction of temperature difference is at 10.27%. From the result,
the behavior of parameters measured show that insulated house has a better thermal
performance compared to the coritrol house. ln future it is important to implement a
cool roof to preserve our nature and sustainability development.