Energy Saving Analysis Of Double Roofs
Incorporating A Radiant Barrier System
Author(s)
H.-H. Wu & C.-M. Lai
Abstract
A double roof is known as a very effective way to reduce both the conduction
and convection heat transfer from a roof to the ceiling of a building; on the other
hand, RBS (Radiant Barrier System) is very effective in blocking the radiation
heat transfer between a roof and a ceiling. In this study, prototypical double
roofs inspired by the concepts of both double-skin structure and the RBS
technique were specifically designed to cut down the solar heat gain from the
roof. The effect of energy saving was experimentally measured.
Keywords: double roof, RBS (Radiant Barrier System), heat gain.
1 Introduction
In Taiwan, electricity consumption by buildings or related properties takes 27%
of the total national electricity consumption, and is the most important energy
consumption besides industrial electricity consumption. It is a primary task of
the national energy-saving program to decrease building energy consumption
under the premier of not influencing the lifeline of Taiwan industry and the
economy. Building electricity consumption can divide into three sectors:
lighting, conditioning and dynamic power. As the changes of the seasons,
energy demand, and building scale, there will be some difference in the
proportion of those three sectors. In summer, energy consumption of the
building conditioning sector may reach up to 28%. According to the statistics
offered by Taiwan Power, conditioning energy consumption has increased from
4293MW in 1990 to 7518MW in 2000, with an average increase of 323MW
annually, that is to say, with an increasing rate of 7.5% annually. Therefore, the
Keywords
double roof, RBS (Radiant Barrier System), heat gain.
Related Book
Other papers in this volume
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