计算围护结构外部各层的温度及水蒸气[宝典]

计算围护结构外部各层的温度及水蒸气[宝典] o60%已知大连某地区,室内温度为,相对温度为;室外温度为24C o60%,相对湿度为,试计算围护结构内部各层的温度及水蒸气,16.9C 分压。 ，，,Wm,K2序号 材料层 ，，dm ,，，gm,h,PS，，Wm,Ka 0.000011 钢筋混凝土 0.20 1.74 17.20 58 双面经界面砂浆 0.000012 处理的竖向凹槽 0.042 0.36 62 EPS板 抹面胶浆复合玻0.000483 0.01 0.045 0.75 纤网格布 80 0.000044 涂料或饰面砂浆 0.02 0.81 10.07 43 oon,1.00t,,16.9C解:由题意得,;查温差修正系数n值得:;t,21Cie o查室内空气与维护结构内表面之间的允许温差表得:;,,,t,6.0,,,t(C) 22及内表面换热阻;外表面换热阻。R,0.04m,KWR,0.11m,KWie d0.2021R,,,0.115m,KW1,1.741 d0.0123计算各材料层热阻: R,,,0.222m,KW3,0.0453 d0.0224R,,,0.025m,KW4,0.814 根据最小总热阻公式: t,tn，，，，24，16.9，1.002ieR,R,，0.11,0.750m,KW,omini ,,,t6.0 所以保温层热阻应有: 2R,R,R,R,R,R,R,0.750,0.11,0.115,0.222,0.025,0.04,0.238m,KW,2omini134e ,,1.25考虑到墙面的灰缝影响,应予修正,查表得修正系数,、S22 ,',,，,,0.042，1.25,0.053Wm,K22 S',S，,,0.36，1.25,0.450Wm,K22 所以保温层厚度;因为大连地区室外温度为d,R，,',0.013m222 o,16.9C,该墙体为III型,且热惰性指标的取值范围为:DD:1.6~4.0 d0.01322取d,0.013m,R,,,0.310m,KW;22,0.0422 D,R,S,0.115，17.2，0.222，0.36，0.238，0.75，0.025，10.07,2.49, 2满足墙体结构且R,0.750m,KWo 所以围护结构内部温度分布为: R0.11oi，，，，,,t,t,t,24,24，16.9,18.00CiiieR0.750o R，R0.11，0.015oi1，，，，,,t,t,t,24,24，16.9,17.18C2iieR0.750o R，R，R0.11，0.015，0.222oi12，，，，,,t,t,t,24,24，16.9,5.08C3iieR0.750o R，R，R，R0.11，0.015，0.222，0.025oi123，，，，,,t,t,t,24,24，16.9,3.71C4iieR0.750o 计算各层材料蒸汽渗透阻: d0.2021H,,,12658.22m,h,Pag1,0.00001581 d0.01322H,,,802.47m,h,Pag2,0.00001622 d0.0123H,,,20.49m,h,Pag3,0.00048803 d0.0224H,,,451.47m,h,Pag4,0.00004434 2H,H，H，H，H,12658.22，802.47，20.49，451.47,13932.65m,h,Pago1234查表得:当 ot,24CP,2983.7Pa,P,P，,,2983.7，60%,1790.22Pa时，则isisot,,16.9CP,138.7Pa,P,P，,,138.7，60%,83.22Pa时，则且eseso,,18.00CP,2062.5Pa时，isi, o,,17.18CP,1961.2Pa时，2s2, o,,5.08CP,878.6Pa时，3s3, o,,3.71CP,791.9Pa时，4s4, H12658.221，，P,P,P,P,1790.22,(1790.22,83.22),239.36Pa2iieH13932.65o H，H12658.22，802.4712，，P,P,P,P,1790.22,(1790.22,83.22),141.04Pa3iieH13932.65o