The Research of the Heat Insulation Efficiencies and Economics on Multiple Covered Envelope Materials for Energy Saving Building
Date Issued
2007
Date
2007
Author(s)
Hsieh, En-Chang
DOI
zh-TW
Abstract
Poor thermal insulation of encasing material for buildings is one of the reasons causing elevated room temperature. This reduces not only the coziness of the environment, but also adds extra loading on the air conditioner. The subjects of this study are the typical composite encasing materials used in the building construction. The composite materials in this experiment are made from the stacking of single-layer materials. The economy and the thermal insulation performance of these composite construction materials were investigated by comparing with other foreign composite construction materials. A total of 25 kinds of composite construction encasing materials made from the combination of 10 single-layer encasing materials, as well as 4 types of foreign composite encasing materials were examined in this experiment based on the thermal propagation evaluation standards established by the Architecture and Building Research Institution, Ministry of the Interior. Calculations and analyses were also performed on data such as temperature, wind speed, and relative humidity, in order to carry out thermal insulation, moist resistance, and economy evaluations for the materials.
The experimental results indicated that thermal insulation ability of encasing materials for buildings depends not only on the radiant heat received or the heat resistance of the material, but also on its moist resistance as well. The selection of a suitable encasing material must consider the surrounding environment where the building is situated. Our experimental results suggested that most well-performed composite encasing materials in terms of thermal insulation ability are number 13 （flashing＋plastic-steel hollow plate＋magnesium plate） and number 22 （hollow concrete plate＋conventional DECK＋magnesium plate）. On the other hand, the best composite encasing material in terms of moist resistance is number 15 （color corrugated plate＋conventional DECK＋calcium silicate board）. In addition, by comparing the amount of heat received, the thermal insulation efficiency of concrete plate is 17.1% less than that of the best single-layer encasing material, calcium silicate board (symbol h). The composite encasing materials made from domestic single-layer construction materials have demonstrated similar thermal insulation characteristic with that of the best foreign composite encasing material, therefore, could be the alternatives of foreign composite encasing material. If further comparing domestic and foreign encasing materials in terms of economy, the best thermal-insulation-designed materials are calcium silicate board and flashing for single-layer material, and number 13 and number 22 for composite material. Since the unit cost of foreign construction materials is higher than that of the domestic counterparts, domestic materials in combination with the stacking technique could be a feasible way of performing construction and at the same time enjoying the energy-conversing benefit of foreign construction materials. Up to now, there is no composite encasing material manufacturer in Taiwan. Therefore, it is recommended that the green construction material manufacturers could take the results of this study as the reference to produce more useful and standardized thermal insulation composite materials.
Subjects
節能建築
複層外殼材料
隔熱性能
透濕抵抗
綠建材
Energy Saving Building
Double Covered Envelope Materials
Thermal Insulation Performance
Moist Resistance
Green Building Material
Type
thesis
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