上海市某食品冷藏库制冷系统设计本科生毕业（设计）论文

膜隔汽一层,?=0.047)/(KmW?(6)20mm厚水泥砂浆,?=0.872)/(KmW?(7)100mm厚钢筋混凝土,?=1.33)/(KmW?239.5)33.1100872.020047.02.004.0200047.02.0174.01033.1100(001.0??????????ii??b.屋面各层结构如下(1)6mmSBS防水卷材,?=0.37)/(KmW?(2)20mm水泥砂浆,?=0.872)/(KmW?(3)150mm厚钢筋混凝土,?=1.33)/(KmW?(4)3mm素水泥浆一道,?=0.30)/(KmW?(5)0.2mm聚乙烯薄膜隔汽一层,?=0.047)/(KmW?(6)200mm厚聚氨酯隔热一层,?=0.027)/(KmW?(7)20mm水泥砂浆,?=0.872)/(KmW?589.7)872.020047.02.0027.02003.0333.1150872.02037.06(001.0??????????ii??c.外墙各层结构如下(1)20mm水泥砂浆,?=0.872)/(KmW?(2)370mm厚砖墙,?=0.87)/(KmW?(3)20mm水泥砂浆,?=0.872)/(KmW?(4)0.2mm聚乙烯薄膜隔汽一层,?=0.047)/(KmW?(5)150mm厚硬质聚氨酯泡沫塑料隔热一层,?=0.031)/(KmW?310.5)031.0150047.02.0872.02087.0370872.020(001.0????????ii??d.内隔热墙各层结构如下(1)20mm水泥砂浆,?=0.872)/(KmW?(2)370mm厚砖墙,?=0.87)/(KmW?(3)20mm水泥砂浆,?=0.872)/(KmW?(4)0.2mm聚乙烯薄膜隔汽一层,?=0.047)/(KmW?(5)70mm厚硬质聚氨酯泡沫塑料,?=0.031)/(KmW?