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为适应国家第三阶段建筑节能政策要求,减少严寒地区既有住宅建筑的热损失。以节能65%为改造目标,利用DeST-h软件对哈尔滨地区某典型住宅的冬季逐时负荷进行模拟,系统分析了外墙、屋顶、外窗、地面不同保温性能时建筑耗热量的变化规律。通过计算建筑设计热负荷,可知主要耗热量所占比例分别是冷风渗透44.2%、外窗30.9%、外墙20.7%和屋顶3.3%;增加保温层厚度可降低建筑能耗,但增加到一定厚度时,再继续增加节能意义不大。严寒地区应采用低传热系数且高遮阳系数类型的外窗。
In order to meet the national third-phase building energy-saving policy requirements, reduce the heat loss of existing residential buildings in severe cold areas. Taking 65% energy saving as the reformation target, DeST-h software is used to simulate the winter hourly load of a typical residential building in Harbin. The change rule of building heat consumption with external insulation, roof, outer window and different insulation properties is systematically analyzed. By calculating the heat load of building design, it can be seen that the proportion of the main heat consumption is 44.2% of the penetration of cold air, 30.9% of the outer window, 20.7% of the outer wall and 3.3% of the roof. Increasing the thickness of the insulation layer can reduce the building energy consumption but increase to a certain thickness When, continue to increase energy conservation is not meaningful. Cold areas should be low heat transfer coefficient and high shade type of window.