摘要
针对建筑外墙保温厚度优化问题,运用P_1-P_2经济模型建立全寿命周期外墙保温最优厚度数学模型,引入节能工程经济外部性概念,通过实测数据采用等效采暖度时数计算建筑能耗。以严寒区某高校建筑为例,分析6种保温系统2种成本核算范围下考虑宿舍、教学楼建筑在寒假正常采暖、寒假低温采暖和寒假及夜间低温采暖运行工况下的最优厚度,并计算最优厚度下全寿命周期总费用、净现值和节能率。研究结果表明:外墙保温经济厚度下净现值由大到小依次是岩棉、XPS、EPS、PUR、泡沫砼、玻化微珠保温砂浆;不考虑经济外部性时,其经济厚度为44.97~168.60mm,生命周期总费用为141.21~251.86元/m^2,净现值为36.14~241.92元/m^2;岩棉经济性最高,是节能优选材料;考虑经济外部性时最优厚度、总费用、净现值平均变幅为11.49%、-22.19%、38.69%;同时文中研究模型为快速确定建筑最优保温厚度提供了一种简便方法。
Arming at the problem of insulation thickness optimization for building walls,economic externality of energy-saving project was introduced,the whole life cycle mathematical model for optimal thickness of exterior wall thermal insulation was built by using P1-P2 economic model,and the energy consumption of the building was calculated by using the equivalent Heating Degree Hours. Taking a campus buildings in severe cold area as an example,the optimal thickness under 6 thermal insulation system and two cost accounting scope was analyzed,for which the operating condition of the normally heating in winter vacation,low temperature heating in winter vacation,and low temperature heating in winter vacation and at night of the dormitory and teaching building were considered. And the whole life cycle total cost,the net present value and energy-saving rate in employing the insulation system with optimum thickness were also calculated. The results show that the net present value adopting optimum insulation thickness of external wall from high to low in sequence were rock wool,XPS,EPS,PUR,foam concrete and glass microbeads insulating mortar. When economic externality was not considered,the optimal thickness was between 44. 97 to 168. 60 mm,the whole life cycle costs ranged from 141. 21 to251. 86 Yuan/m2,and net present value ranged from 36. 14 to 241. 92 Yuan/m2. Rock wool economy was the highest,and was the energy-saving optimization material. Within economic externality,the optimal thickness,total cost and net present value averagely changed 11. 49%,-22. 19%,and 38. 69%,respectively. Meanwhile,a simple method for speechlessly determining the optimal thickness of buildings was provided.
作者
张垚
崔宝霞
牛建刚
金国辉
ZHANG Yao;CUI Baoxia;NIU Jiangang;JIN Guohui(School of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2018年第9期117-125,共9页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(51668051)
内蒙古自然科学基金项目(2016MS0516)(2017MS(LH)0532)
内蒙古科技大学创新基金项目(2017QDL-S07)资助
关键词
外墙保温
等效采暖度时数
红外热像技术法
P1-P2模型
经济厚度
经济外部性
external wall thermal insulating
equivalence heating degree hours
infrared thermal technology method
P1 - P2 model
economic thickness
economic externality
作者简介
张垚（1990-），男，汉族，内蒙古呼和浩特人，硕士，助教，主要从事建筑可持续发展和工程项目管理研究。Email：Jason_zyao@163．com
