内蒙古草原民居外围护结构热惰性研究

Study on thermal inertia of external protective structure of grassland residential houses in Inner Mongolia

对内蒙古西部草原民居外围护结构的热惰性指标(D)进行研究,分析有无保温、不同墙厚、不同保温层厚度时热惰性指标D值对采暖能耗和室内热舒适值(PMV值)的影响。采用MATLAB软件,用最小二乘法将D值与采暖能耗和PMV进行曲线拟合。结果表明:无保温时D的最佳取值为6.75,有保温时D的最佳取值为6.54;无保温时,小窗墙比对采暖能耗的影响明显优于大窗墙比时的情况,而PMV值的结果正好相反;有保温时,小窗墙比不仅能降低采暖能耗,而且可以提高PMV值;保温材料的综合保温效果为:PUR最佳,XPS次之,EPS最差。

Study the thermal inertia(D)of the external protection structure of grassland residential houses in the western Inner Mongolia,analyze the influcnce of thermal inertia D on the heating energy consumption and indoor thermal comfort with the influencing factors,such as:whether there is insulation,different wall thickness,and different insulation thickness.Using MATLAB software,the least squares method was used to fit the curve of D with heating energy consumption and PMV.The results show that the optimal value of D is 6.75 when there is no insulation,and 6.54when there is insulation.When there is no insulation,the effect of small window and wall ratio is better than that of large window and wall ratio,while the PMV value is just the opposite. In the case of thermal insulation,the small window/wall ratio not only reduces heating energy consumption,hut also improves PMV, the overall effect of thermal insulation material is:PUR is the hest,XPS is the second,and EPS is the worst.