公共建筑年能耗强度影响因素交互作用  

Interaction of Influencing Factors of Annual Energy Consumption Intensity of Public Buildings

作　　者：那威[1] 王明明 赵馨怡 曹阳 NA Wei;WANG Mingming;ZHAO Xinyi;CAO Yang

机构地区：[1]北京建筑大学,北京100044 [2]中冶建筑研究总院有限公司,北京100082

出　　处：《煤气与热力》2022年第4期17-20,26,共5页Gas & Heat

摘　　要：将严寒及寒冷地区60栋公共建筑作为研究对象,采用广义多因子降维方法,将公共建筑年能耗强度作为因变量,进行体形系数与围护结构传热系数(外墙传热系数、外窗传热系数、屋面传热系数)的两两组合交互作用计算,分析最优因素组合以及获得低年能耗强度的因素取值范围。最优因素组合为体形系数与外墙传热系数,体形系数小于0.2、外墙传热系数小于0.35 W/(m^(2)·K)下公共建筑获得低年能耗强度的概率最大。对于60栋公共建筑:体形系数小于0.2、外墙传热系数小于0.35 W/(m^(2)·K)的公共建筑共14栋,年能耗强度算术平均值为63.04 kW·h/(m^(2)·a)。体形系数大于0.3、外墙传热系数为0.35~0.50 W/(m^(2)·K)的公共建筑共9栋,年能耗强度算术平均值为103.7 kW·h/(m^(2)·a)。实际情况与交互作用计算结果相符。总体上,外墙传热系数越小,年能耗强度越低。体形系数小是导致外墙传热系数较大的公共建筑反而有更低的年能耗强度的主要原因。存在个别公共建筑外墙传热系数和体形系数均比较大而年能耗强度却比较小的情况,但不影响整体趋势。Taking 60 public buildings in severe cold and cold regions as the research objects,the generalized multi-factor dimensionality reduction method is adopted,the annual energy consumption intensity of public buildings is taken as the dependent variable to calculate the combined interaction effect in pairs for shape coefficient and envelope heat transfer coefficient(the external wall heat transfer coefficient,external window heat transfer coefficient and roof heat transfer coefficient).The optimal combination of factors is analyzed and the value range of factors for low annual energy consumption intensity is obtained.The optimal combination of factors is the shape coefficient and the external wall heat transfer coefficient.The public buildings have the highest probability of obtaining the low annual energy consumption intensity when the shape coefficient is less than 0.2 and the external wall heat transfer coefficient is less than 0.35 W/(m^(2)·K).For 60 public buildings:there are 14 public buildings with shape coefficient less than 0.2 and external wall heat transfer coefficient less than 0.35 W/(m^(2)·K),and the arithmetic mean of annual energy consumption intensity is 63.04 kW·h/(m^(2)·a).There are 9 public buildings with shape coefficient greater than 0.3 and external wall heat transfer coefficient of 0.35-0.50 W/(m^(2)·K),and the arithmetic mean of annual energy consumption intensity is 103.7 kW·h/(m^(2)·a).The actual situation is consistent with the interaction calculation results.In general,the smaller the external wall heat transfer coefficient,the lower the annual energy consumption intensity.The small shape coefficient is the main reason for the lower annual energy consumption intensity of public buildings with large external wall heat transfer coefficient.There are some cases where the external wall heat transfer coefficient and shape coefficient of individual public buildings are relatively large,but the annual energy consumption intensity is relatively small,but it does not affect the overall tren

关 键 词：公共建筑 影响因素交互作用 年能耗强度 体形系数 外墙传热系数 

分 类 号：TU832.02[建筑科学—供热、供燃气、通风及空调工程]