保冷层厚度的计算方法.xls

保冷层厚度的计算方法.xls

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保保冷冷层层厚厚度度的的计计算算方方法法（管管道道和和平平面面）

（一）管道保冷层厚度的方法计算管道内介质的温度tf=7输入保冷层外表面温度ts=28.3不要输入露点温度td=26.3输入保温材料在环境温度下的导热系数W/mk=0.05输入管道外径mDo=0.032输入管道周围环境温度ta=32输入保冷层表面对周围空气的换热系数W/（m2k）s=8D1/DOln（D1/DO）=：

D1/DOln（D1/Dw）=2.2487不要输入令D1/DOln（D1/DO）=xlnx：

xlnx=2.2487不要输入D1/DO=Xx=2.17得出则保温层厚度为:

m=0.0187得出

（二）.对于平面保冷的方法计算介质的温度tf=7输入保冷层外表面温度ts=23.4不要输入保温层露点温度td=21.4输入保温材料在环境温度下的导热系数W/mk=0.05输入周围环境温度ta=32输入保冷层表面对周围空气的换热系数W/（m2k）s=822=0.023837209不要输入则保温层厚度为:

m=0.0119不要输入备注根据GB/T11790,Ts=Td+（1-3）（也可以自己直接输入，）查见后附表5一般取8-9W/（m2k）d1/dwln（d1/dw）=2k（tf-ts）/sdo（ts-ta）自动生成根据上面xlnx=及查见后面附表1得出=（d1-do）/2=（x-1）do/2根据GB/T11790,Ts=Td+（1-3）查见后附表5一般取8-9W/（m2k）=2/2保保冷冷层层厚厚度度的的计计算算方方法法（管管道道和和平平面面）x与与xlnx函函数数表表（当当x=15时时的的xlnx）值值xxlnxxxlnxxxlnxxxlnxx10.0001.420.4992.141.632.863.0023.581.0050.0051.430.5122.151.6482.873.0213.591.010.010051.440.5262.161.6652.883.0453.61.0150.015151.450.5392.171.6812.893.0653.611.020.02021.460.5522.181.6992.93.0853.621.0250.2531.470.5652.191.722.913.1043.631.030.03041.480.582.21.7352.923.133.641.0350.03561.490.5942.211.7562.933.153.651.040.04071.50.6072.221.7712.943.173.661.0450.0461.510.6222.231.7912.953.193.671.050.05121.520.6372.241.8052.963.213.681.0550.05651.530.652.251.8252.973.243.691.060.06171.540.6652.261.8412.983.253.71.0650.0671.550.6792.271.8612.993.273.711.070.07241.560.6952.281.8833.293.721.0750.07771.570.7082.291.8993.013.313.731.080.08311.580.7222.31.923.023.343.741.0850.08851.590.7372.311.9353.033.363.751.090.09461.60.7512.321.9553.043.383.761.0950.09941.610.7652.331.973.053.43.771.10.10481.620.7822.341.993.063.423.781.1050.111.630.7992.352.0073.073.443.791.110.11621.640.8152.362.0273.083.463.81.1150.121.1.650.8272.372.0423.093.483.811.120.127.1.660.8422.382.0623.13.53.821.1250.13271.670.8562.392.083.113.533.831.130.1381.680.8722.42.13.123.553.841.1350.1431.690.8892.412.123.133.573.851.140.14921.70.9022.422.143.143.593.861.1450.15451.710.9162.432.163.153.613.871.150.16071.720.9322.442.183.163.643.881.1550.16651.730.9492.452.1953.173.663.891.160.17211.740.9652.462.2173.183.683.91.1650.17721.750.982.472.2333.193.73.911.170.18461.760.9942.482.2553.23.723.921.1750.1891.771.0112.492.273.213.743.931.180.1951.781.0292.52.293.223.763.941.1850.2011.791.042.512.313.233.783.951.190.2071.81.0592.522.3283.243.813.961.1950.2131.811.0812.532.3443.253.833.971.20.2181.821.0892.542.373.263.853.981.2050.251.831.1082.552.3853.273.883.991.210.231.841.1212.562.4053.283.941.2150.2361.851.1382.572.4253.293.924.011.220.2421.861.1522.582.4443.33.944.021.2250.2451.871.1692.592.4623.313.964.031.230.25451.881.1852.62.483.323.984.041.2350.2611.891.2052.612.5033.3344.051.240.2661.91.222.622.5213.344.034.061.2450.2721.911.2342.632.543.354.054.071.250.2791.921.2512.642.563.364.074.081.2550.2851.931.272.652.583.374.094.091.260.2911.941.2882.662.63.384.124.11.2650.2981.951.3022.672.623.394.144.111.270.341.961.3182.682.643.44.164.121.2750.3091.971.3352.692.663.414.184.131.280.3161.981.3512.72.683.424.24.141.2850.3221.991.3692.712.73.434.234.151.290.32821.3862.722.723.444.254.161.2950.3342.011.4012.732.743.454.274.171.30.342.021.4192.742.763.464.34.181.310.3542.031.4392.752.783.474.324.191.320.3672.041.4552.762.83.484.344.21.330.382.051.4712.772.823.494.364.211.340.3892.061.4882.782.843.54.384.221.350.4052.071.5072.792.863.514.44.231.360.4172.081.522.82.883.524.424.241.370.4322.091.5422.812.9013.534.454.251.380.4452.11.5592.822.9213.544.474.261.390.4572.111.5792.832.943.554.54.271.40.472.121.5922.842.9613.564.524.281.410.4852.131.612.852.983.574.554.29xlnxxxlnx4.574.36.274.594.316.294.624.326.324.644.336.354.664.346.384.684.356.44.714.366.424.734.376.444.754.386.464.774.396.484.84.46.524.824.416.544.844.426.574.864.436.64.884.446.624.914.456.644.934.466.674.964.476.74.984.486.7254.496.745.034.56.775.054.516.795.074.526.815.094.536.835.124.546.865.154.556.95.174.566.925.194.576.945.214.586.975.244.596.995.264.67.025.284.617.055.314.627.075.334.637.15.354.647.1253.74.657.145.44.667.165.434.677.195.454.687.215.474.697.245.54.77.265.534.717.285.554.727.325.574.737.355.64.747.385.624.757.45.644.767.425.664.777.455.684.787.475.714.797.55.744.87.525.764.817.555.784.827.585.814.837.65.834.847.635.854.857.655.884.867.685.914.877.75.934.887.735.954.897.765.984.97.786.014.917.86.034.927.836.054.937.856.074.947.866.14.957.96.134.967.926.154.977.956.174.9886.194.998.026.2258.056.25附附表表2:

保保温温层层平平均均温温度度tp周围空气温度（）介质温度10015020025030035040025709512515017520523015659012014517020022506080110135160190215-155575105130155185210附附表表3-1:

季季节节运运行行工工况况允允许许最最大大散散热热损损失失设备、管道及附件外表面温度50100150200250300允许最大散热损失116163203244279308附附表表3-2:

常常年年运运行行工工况况允允许许最最大大散散热热损损失失设备、管道及附件外表面温度323（50）373（100）423（150）473（200）523（250）573（250）允许最大散热损失5893116140163186附附表表4:

保保温温层层表表面面热热阻阻公称直径（mm）室内室外介质温度t（）介质温度t（）100200300400500100200300圆筒面放热阻力R2（m2K/w）250.3010.2580.2150.1980.1890.1030.0950.086320.2750.2320.1980.1630.1380.0950.0860.077400.2580.2150.1810.1550.1290.0860.0770.069500.1980.1630.1380.120.1030.0690.060.052100