严寒地区墙体保温性能影响因素分析

ANALYSIS OF INFLUENCING FACTORS ON WALL THERMAL INSULATION PERFORMANCE IN SEVERE COLD AREA

文中通过测试采用不同构造墙体的实验房在未供暖状态冬季室内温度和墙体内温度比较,建筑物墙体的保温性能不仅与墙体的传热系数有关,同时也与墙体的热惰性有关,保温砂浆有利于建筑物吸收太阳辐射热;供暖情况下维持室内相同温度,比较供暖负荷大小,当墙体传热系数相同时,热惰性越大,建筑物耗热量越小。因此选取热惰性大的无机保温墙体不仅可以满足防火要求,更有利于节能。虽然墙体传热系数对建筑物保温性能起决定性作用,但不能仅仅用传热系数来评价建筑节能效果,计算时应同时考虑热惰性的影响,文中给出影响的比例关系,为设计和保温性能评价提供理论依据。

When the experimental buildings with different insulating structure walls are not heated in winter,the indoor temperature and the internal temperature of walls are compared in this experiment.It is shown that the thermal insulation performance of the wall is not only related to the heat transfer coefficient,but also related to the thermal inertia.Compared with expanded polystyrene foam board,the thermal insulation mortar is good for buildings to absorb solar radiation heat.Furthermore,the heating loads are compared,while maintaining the same indoor temperature in different experiment buildings.When the heat transfer coefficient of the wall is the same,the greater the thermal inertia,the smaller the heat consumption of the building.Therefore,the selection of Inorganic insulation wall with large thermal inertia can not only meet the fire requirements,but also perform better in energy saving.Although the heat transfer coefficient of the wall plays a decisive role in the insulation performance of the building,it is not the only factor that can be used to evaluate the effect of building energy saving.The influence of thermal inertia should also be considered in the calculation.The proportional relationship of influence is given in this report,and it can offers theoretical foundation for design and evaluation of insulation performance.