K:/BSE/BSE 418153.3d (BSE) [PREPRINTER stage] An analysis of heat insulation efficiency of building outer skins used for green building

Abstract

In general, the poor thermal insulation of building materials usually causes elevated room temperature, which not only reduces the comfort of the environment but also adds extra loading to the air conditioner. The objective of this study is to investigate the heat insulation efficiencies of building outer skins used for green building. A total of 25 types of multi-layer cladding materials and 9 types of single-layer skin materials made in Taiwan along with 4 types of overseas multi-layer skin materials were tested using the hot box method (HBM). The above data were then adopted to calculate the heat-insulation ability, vapor transmission volume and heat gain cooling load. Besides, the costs of the above materials were also collected to provide useful information for green building industry to select the most proper skin materials in considering both the material performance and costs. The analysis results suggest that the ‘k ’ group (paint-baked metal plate þ 2’ ’ 100 k rock wool þ paint-baked metal plate) exhibits the best heat-insulating capacity, which is 67.0%. However, Item 15 (colour corrugated steel plateþ conventional steel bearing plateþ cal-cium silicate board) presents the smallest moisture-permeable amount at 0.001 g/h. Besides, Item ‘13 ’ exhibits the smallest cooling load, which is 1.8W. From the above, it i

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oai:CiteSeerX.psu:10.1.1.983.3848Last time updated on 11/2/2017

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