湖南大学学报（自然科学版）2017，Vol.44Issue(9)：182-187,6.DOI:10.16339/j.cnki.hdxbzkb.2017.09.023
建筑外墙最佳保温厚度及环境影响研究
Optimum Insulation Thickness of Exterior Wall and Its Environment Impacts
摘要
Abstract
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 analyzethe 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％.关键词
建筑外墙/保温层最佳厚度/生命周期成本/现值因子/环境影响Key words
exterior wall/optimum insulation thickness/life cycle cost/present worth factor/environment impact分类
建筑与水利引用本文复制引用
刘向伟,郭兴国,陈国杰,陈友明,罗娜..建筑外墙最佳保温厚度及环境影响研究[J].湖南大学学报（自然科学版）,2017,44(9):182-187,6.基金项目
国家自然科学基金资助项目(51208247,51408294,51078127),National Natural Science Foundation of China (51208247,51408294,51078127) （51208247,51408294,51078127）
