传热系数计算

传热系数K值计算K=1/(1/αn+1/αw+ΣR)ΣR=Σδ/λ,δ--材料厚度m；λ--材料导热系数W/m.K1/αn+1/αw=0.15外墙屋面体形系数<0.30屋面类型1材料名称厚度导热系数修正系数热阻总热阻传热系数限值mmW/m.Km2.k/wW/m.K1防水层40.1710.02352941181.854970190.540.552水泥砂浆找平层300.9310.03225806453挤塑泡沫保温板500.031.11.5151515154水泥焦渣找坡层300.5610.05357142865现浇钢筋混凝土板1001.7410.05747126446混合砂浆200.8710.02298850571.681981684外墙1(外墙外保温)材料名称厚度导热系数修正系数热阻总热阻传热系数限值mmW/m.Km2.k/wW/m.K1混合砂浆200.8710.02298850571.7234978780.580.62挤塑泡沫保温板350.031.11.0606060613聚合物砂浆粘结层50.9310.00537634414空心砖墙2400.5210.46153846155混合砂浆200.8710.0229885057非采暖房间与采暖房间的隔墙(内保温)材料名称厚度导热系数修正系数热阻总热阻传热系数传热系数的修正系数平均传热系数Kp限值mmW/m.Km2.k/wW/m.K混合沙浆200.8710.02298850571.2663940250.7901.10.871.5挤塑泡沫保温板200.031.10.6060606061聚合物砂浆40.9310.0043010753空心砖墙2400.5210.4615384615水泥沙浆200.9310.0215053763非采暖房间与采暖房间的楼板材料名称厚度导热系数修正系数热阻总热阻传热系数传热系数的修正系数平均传热系数Kp限值mmW/m.Km2.k/wW/m.K水泥沙浆200.9310.02150537630.73534396441.3601.11.4961.5硬质岩棉板250.0461.10.4940711462现浇钢筋混凝土板1201.7210.0697674419外窗1铝合金门窗LOW-E中空玻璃(空气间层厚度12)传热系数K=2.5W/m.K非采暖房间与走廊的隔墙(不保温)材料名称厚度导热系数修正系数热阻总热阻传热系数mmW/m.Km2.k/wW/m.K混合沙浆200.8710.02298850570.65603234361.524挤塑泡沫保温板00.031.10聚合物砂浆00.9310空心砖墙2400.5210.4615384615水泥沙浆200.9310.0215053763