A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Reflective Insulation in South-East Asia Region
The use of reflective insulation as roof insulation has become increasingly popular in Southeast Asian countries. It is proven to be effective at reducing heat gain through the roof and building energy consumption, as well as improving indoor thermal comfort. The present work is divided into three sections: field measurements of the thermal performance of reflective insulation in Malaysia, Computational Fluid Dynamics (CFD) analysis of reflective insulation in a gable roof system, and techno-economic analysis of roof thermal insulations for a hypermarket under the equatorial climate of Malaysia. Reflective insulation has proven to be an effective type of roof insulation for buildings in Southeast Asia, where the predominant heat flow direction is downward. Measured thermal resistance (RSI values) of roof assemblies with reflective insulations showed results in the range from 2 to 3 m2·K/W. A ceiling heat flux reduction of 80% was obtained for roofs with reflective insulation as compared to uninsulated roof attic. A validated CFD model showed that increasing the reflective air gap from 25 to 100 mm increases the RSI value of the roof assembly by 26%. Besides that, increasing the roof pitch from 30° to 45° increases the RSI value of the roof assembly by 30%. The techno-economic analysis showed that small bubble aluminum foil has the highest life-cycle savings and internal rate of return, as well as the shortest payback period. Although it does not yield the lowest annual cooling energy consumption, it is the most cost-effective type of insulation to be used as roof insulation under the hot and humid climate of Malaysia.
Reflective Insulation in South-East Asia Region
The use of reflective insulation as roof insulation has become increasingly popular in Southeast Asian countries. It is proven to be effective at reducing heat gain through the roof and building energy consumption, as well as improving indoor thermal comfort. The present work is divided into three sections: field measurements of the thermal performance of reflective insulation in Malaysia, Computational Fluid Dynamics (CFD) analysis of reflective insulation in a gable roof system, and techno-economic analysis of roof thermal insulations for a hypermarket under the equatorial climate of Malaysia. Reflective insulation has proven to be an effective type of roof insulation for buildings in Southeast Asia, where the predominant heat flow direction is downward. Measured thermal resistance (RSI values) of roof assemblies with reflective insulations showed results in the range from 2 to 3 m2·K/W. A ceiling heat flux reduction of 80% was obtained for roofs with reflective insulation as compared to uninsulated roof attic. A validated CFD model showed that increasing the reflective air gap from 25 to 100 mm increases the RSI value of the roof assembly by 26%. Besides that, increasing the roof pitch from 30° to 45° increases the RSI value of the roof assembly by 30%. The techno-economic analysis showed that small bubble aluminum foil has the highest life-cycle savings and internal rate of return, as well as the shortest payback period. Although it does not yield the lowest annual cooling energy consumption, it is the most cost-effective type of insulation to be used as roof insulation under the hot and humid climate of Malaysia.
Reflective Insulation in South-East Asia Region
Green Energy,Technology
Kośny, Jan (editor) / Yarbrough, David W. (editor) / Haw, Lim Chin (author) / Bin Mohd Ashhar, Muhamad Zahin (author)
Thermal Insulation and Radiation Control Technologies for Buildings ; Chapter: 4 ; 83-128
2022-06-07
46 pages
Article/Chapter (Book)
Electronic Resource
English
Thermal Comfort in the Tropical South East Asia Region
| Taylor & Francis Verlag | 1996
Thermal Comfort in the Tropical South East Asia Region
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