杨昌智?覮,刘浩为,雷小慧.既有建筑各组成类型围护结构 热工性能分类诊断的方法[J].湖南大学学报:自然科学版,2021,(7):145~150
既有建筑各组成类型围护结构 热工性能分类诊断的方法
A Method for Evaluating Thermal Performance of Various Envelopes in Existing Buildings
  
DOI:
中文关键词:  围护结构  热工性能  快捷检测诊断  等效传热系数  正交试验
英文关键词:envelope structure  thermal performance  fast detection and diagnosis  equivalent heat transfer coefficients  orthogonal experiments
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作者单位
杨昌智?覮,刘浩为,雷小慧 (湖南大学 土木工程学院湖南 长沙 410082) 
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中文摘要:
      基于等效传热系数法与正交试验法,针对既有建筑各组成类型围护结构的热工性能提出了一种分类诊断方法. 该诊断方法首先将各类型围护结构的传热系数综合成一个等效指标——综合等效传热系数. 只需要测量既有建筑室内外温度序列与各类型围护结构的几何尺寸,便可以计算出综合等效传热系数,再通过正交试验法与回归分析法求出各类型围护结构的等效传热系数. 将各类型围护结构的等效传热系数与节能设计标准中传热系数的限值进行比较,便可以诊断其热工性能. 为了验证方法的可行性,以位于长沙市的一栋实验小房为例进行计算,得到了外墙、外窗、屋顶与外门的等效传热系数分别为1.62 W/(m2·K)、2.84 W/(m2·K)、1.25 W/(m2·K)、3.14 W/(m2·K). 对比等效传热系数与实际传热系数,两者数值吻合较好,证明了该方法在工程应用上具有可行性.
英文摘要:
      Based on the equivalent heat transfer coefficient method and orthogonal experiments,a method for evaluating the thermal performance of various envelopes in existing buildings is proposed. The heat transfer coefficients of the external wall,external window,roof,and external door are integrated into an index(comprehensive equivalent heat transfer coefficient). It is only necessary to measure indoor and outdoor temperature sequences of the existing buildings and geometrical dimensions of envelopes. The comprehensive equivalent heat transfer coefficient can be calculated,and the equivalent heat transfer coefficient of various envelopes can be obtained by orthogonal experiments and regression analysis. By comparing the equivalent heat transfer coefficients of various envelopes with heat transfer coefficient limits in standards,the thermal performance can be evaluated. To verify the feasibility of the method,a small experimental building located in Changsha is taken as an example. The equivalent heat transfer coefficients of the external wall,external window,roof and external door are1.62 W/(m2·K),2.84 W/(m2·K),1.25 W/(m2·K) and 3.14 W/(m2·K),respectively. Comparing equivalent heat transfer coefficients with actual heat transfer coefficients,the values are in good agreement,which proves that the method is feasible in engineering applications.
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