铝合金门窗K值理论计算

项目名称a隔热空气腔净宽度6.5021.00a1隔热条厚度2.002.00d隔热条宽度14.8024.00λ1PA66隔热条导热系数0.23000.2300λ0空气间隔层导热系数0.03150.0511hgc空气间隔层对流传热系数0.43200.4320λ0'空气间隙当量导热系数0.09710.1575λ~断热桥与空气间隙并联体系的等效导热系数0.12840.1638Rgap两金属表面间的热阻0.11530.1465ε表面热发射率0.84000.8400Ai金属内表面换热系数8.74088.7408Ae金属外表面换热系数23.040823.0408Ro两金属表面间的热阻及内外表面的换热阻的和0.27310.2731Uf框材组传热系数3.66183.05002.00A窗型面积2.252.25L玻璃边长7.87.8ψ中空玻璃边界的线性传热系数0.050.05ηf框扇所占整窗的面积比0.250.25Ug玻璃传热系数2.002.00Uf框材组传热系数3.66183.0500U整窗传热系数2.58882.4358隔热铝合金门窗传热系数理论计算表3.整窗U值计算假定玻璃及窗扇的传热为严格的并联关系，则可用下面公式近似计算：其中:1.计算参数2.玻璃Ug值U=Ug+ηf(Uf-Ug)+ψL/A数值5Low-E+9Ar+5+9Ar+5三玻两中空玻璃单位mmmmmmW/(m·K)W/(m·K)W/(m3·K)W/(m·K)W/(m·K)m3·K/WW/(m2·K)W/(m2·K)m3·K/WW/(m3·K)W/(m2·K)计算方法二Ｕw=Σ(Ag·Ｕg+Af·Ｕf+Lg·ψg)/(Ag+Af)简化：Ｕw=Ag%·Ｕg+Af%·Ｕf其中：Ｕw－整窗的传热系数W/m2·Km2Ｕg－中空玻璃的传热系数W/m2·KmAg－中空玻璃的面积m2Ｕf－隔热型材的传热系数W/m2·KAf－隔热型材的面积m2W/(m2·K)Lg－中空玻璃的周长mW/(m2·K)ψg－中空玻璃边界的线性传热系数W/m·KW/(m2·K)计算结果：Ｕw2.6525W/(m2·K)3.整窗U值计算假定玻璃及窗扇的传热为严格的并联关系，则可用下面公式近似计算：其中:1.计算参数2.玻璃Ug值U=Ug+ηf(Uf-Ug)+ψL/A1.01.41.82.22.6单层玻璃5.74.34.44.54.64.83.32.72.82.93.13.23.12.62.72.82.93.12.92.42.52.72.832.72.32.42.52.62.82.52.22.32.42.62.72.32.12.22.32.42.62.11.922.22.32.41.91.81.922.12.31.71.61.81.922.21.51.51.61.71.921.31.41.51.61.71.91.11.21.31.51.61.72.322.12.22.42.52.11.922.12.22.41.91.71.822.12.31.71.61.71.81.92.11.51.51.61.71.921.31.41.51.61.71.91.11.21.31.51.61.70.91.11.21.31.41.60.70.91.11.21.31.50.50.80.911.21.3玻框配置表W/（m2·K）注：中空玻璃边界的线性传热系数按暖边ψ＝0.05计算。中空玻璃三层玻璃玻璃种类UgUf(玻框比：30﹪)3.03.43.874.955.16.13.43.53.64.43.23.33.54.33.13.23.34.12.93.13.242.833.13.92.72.82.93.82.62.72.83.62.42.52.73.52.32.42.53.32.12.32.43.222.12.23.11.922.12.92.72.82.93.72.52.62.83.62.42.52.63.42.22.42.53.32.12.22.43.222.12.23.11.922.12.91.71.822.81.61.71.82.61.41.61.72.5玻框配置表W/（m2·K）注：中空玻璃边界的线性传热系数按暖边ψ＝0.05计算。Uf(玻框比：30﹪)