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In order to counteract the threats created by global warming to our environment, the issue of how to conserve energy and minimize the carbon emission as well as seek for sustained development for environment has become important throughout the world. Nevertheless with raised standard in people living quality, air conditioning is the indispensible element for all homeowners therefore the annual growth found in the air conditioning load would indirectly cause undue stress to the environment hence how to reduce the air conditioning load would become one of the top issues for us all.
The thermal insulation and the heat storage performance for the known air conditioning load and the building envelope are indistinguishable which would directly affect the needed energy while operating air conditioning. Thus this research would proceed with 60 study cases as the foundation, and through the resolution from expert consultation and meeting, we found that the normal building envelope and the building basic model were decided hence in order to work in conjunction with surveys conducted, which tallied the common lifestyle for the residents in Ilan area, and lastly, we proceeded to building structure air conditioning simulation through ECOTECT, the computer software, so as to understand the impacts to the single-house residential air conditioning load by the commonly seen building envelope. The single house residential and basic model in Ilan area proposed in this research is a building area with 163 square meters, and common to both the flat and slant rooftop. The windows and façades was 16.9% of a two-story building. In addition, according to the insulation performance as well as material density, a five set of “commonly seen” building envelope was used as sample.
After comparative analyses, the simulated data revealed that: First, as for the rooftop construct portion, while the low insulation reconstruction was transformed into high insulation with light and heavy construct for the slant and flat rooftop, we found that heat air conditioning load was lowered by 14.8% whereas for the cooling air conditioning load, it dropped down 18% and 13.5% for all-year-round air conditioning load. As for the outer building envelope portion, while the low insulation construct was changed to high heat insulation and light construct, the air conditioning load for the warm room dropped 26.5% whereas the cooling room air conditioning load was 8.1% down and the all-year-round air conditioning load was down by 22.4%. Lastly, from the overall building envelope perspective, while changing from low insulation and heavy construct to high insulation with light and heavy construct the heat air conditioning load dropped 38.2% whereas the cooling air conditioning load was down by 15.9% and 33.2% down for the all-year-round air conditioning load. Findings of this research indicated that different building envelope did have significant impact to the building air conditioning load, thus, from the perspective of lowering the building air conditioning load in Ilan area, applying high insulation with light construct would be more appropriate than that with low insulation with heavy construct.
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