天津居住建筑节能率与节能策略分析

结合工程实例，对天津某居住建筑的耗热量指标、节能率、各种围护结构能耗权重进行了计算，实际节能率为67．9％。外窗、外墙的能耗权重较高，为实施节能措施的对象。以节能率70％、75％为目标，在分别提高外窗、外墙绝热性能的前提下，计算了节能措施的经济性。对于实现节能率70％，通过降低外窗传热系数或增加外墙挤塑聚苯板的厚度均可实现，后者的经济性较优。对于实现75％节能率，单纯增加外墙的保温层厚度或单纯降低外窗的传热系数，并不现实。可行的方法是在改善外墙及外窗绝热性能的同时，降低建筑南、北向的窗墙比。

Analysis on Energy Saving Rate and Strategy for Residential Building in Tianjin

Combined with an engineering case,heat consumption index,energy saving rate and energy consumption weight of different envelopes of a residential building in Tianjin are calculated,with the actual energy saving rate of 67.9%.Due to high energy consumption weight,the external windows and walls are the primary objects of energy saving measures.Aimed at the energy saving rates of 70% and 75%,the economic efficiency of energy saving measures are calculated under the premise of improving the insulation performan...