Optimum Insulation Thickness of Exterior Wall and Its Environment Impacts

被引：0
|
作者：
Liu X. [1 ]
Guo X. [1 ]
Chen G. [2 ,3 ]
Chen Y. [2 ]
Luo N. [1 ]
机构：
[1] School of Civil Engineering and Architecture, Nanchang University, Nanchang
[2] College of Civil Engineering, Hunan University, Changsha
[3] College of Civil Engineering, University of South China, Hengyang
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2017年 / 44卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Environment impact; Exterior wall; Life cycle cost; Optimum insulation thickness; Present worth factor;
D O I：
10.16339/j.cnki.hdxbzkb.2017.09.023
中图分类号：
学科分类号：
摘要：
Thermal insulation is an effective way to reduce the energy consumption of buildings. And it is friendly for environment because the reduction of energy consumption means less emission. In this paper, the transient heat transfer model was used to calculate the energy consumption caused by the heat transmission cross the exterior wall into room. P1-P2 economic model was used to analyze the life cycle total cost of exterior wall of residential building. The optimum thickness of the commonly used insulation materials including extruded polystyrene and expanded polystyrene was calculated with respect to East, South, West and North. The life cycle savings and payback periods were analyzed. The equivalent coal was calculated according to electricity consumption which is generated by the coal-fired power. Then the emission of CO2 and SO2 was estimated. The reduction potential of emissions was calculated when optimum insulation thickness was applied in comparison to un-insulated situation. Taking Changsha for example, the results show that the optimum insulation thickness is between 0.08 and 0.13m.The maximum life cycle saving varies from 116.26 to 133.45 yuan/m2. The payback period ranges from 3.1 to 3.5 years. The economic performance of expanded polystyrene is better than that of extruded polystyrene according to the economic indexes. The emission of CO2 can be reduced by 17.4~19.51 kg/m2 year, and the emission of SO2 can be reduced by 0.036~0.04 kg/m2year. The emissions can be reduced by 74.5~78.6%. © 2017, Editorial Department of Journal of Hunan University. All right reserved.
引用
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页码：182 / 187
页数：5
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