真空管道阻力降计算2013.08.30

管道号123456真空容器压力P1PaA2000.0温度t℃20.0真空容器气相出料质量流量Wkg/h5400.0密度ρkg/m30.500粘度μmPa.s0.0100分子量M29.00管道内径Dmm150.0管道长度Lm41.86局部阻力当量长度Lem2.72总长度L+Lem44.58(L+Le)/D0.30真空容器气相出料体积流量S1m3/s3.00边界条件P*D300.0假设起始点体积流量比S1/S20.80根据假设计算等P2PaA1600.0计算平均压力P平1800.0计算流导Cm3/s15.00实际流导C实际50.16真空泵入口实际流量S2m3/s3.19真空泵入口实际压力P2PaA1880.39阻力降计算基础数据真空系统管道阻力降计算表一、说明：1、本表根据《化工工艺设计手册》第四版第25章编制；2、黄色底色为可输入区域。二、计算步骤：1、输入基础数据，管件阀门当量长度可通过管件阀门当量长度表计算得到；2、假设管径D及起始点体积流量比S1/S2，S1/S2可取0.6-0.8；3、比较实际流导与计算流导，如实际流导大于计算流导，则管径满足要求，否则，应增大管径。如实际流导大于计算流导较多，可减小管径，试探较小管径是否能满足要求。2025405080100150200250900弯头0.370.490.730.951.341.82.723.74.3900长半径弯头0.40.490.70.821.021.281.742.132.44450弯头0.180.250.40.520.791.071.712.352.75直流三通0.250.310.460.550.670.851.161.441.58支流三通0.791.01.582.02.863.75.57.39.31800弯头0.370.490.730.951.341.82.723.74.31800长半径弯头0.40.490.70.821.021.281.742.12.44截止阀12.213.718.021.328.637.058.079.094.0闸阀0.790.850.890.980.980.98角阀4.65.25.56.48.511.619.227.537.0止回阀1.622.23.75.28.211.619.227.537.0圆角0.040.060.10.130.20.290.490.70.89锐边0.40.550.951.322.042.94.97.08.9由容器流入管道内0.791.11.892.64.05.89.813.717.7管道公称直径DN管件阀门真空系统管件和阀门当量长度（m）300350400450500当量长度选取数量总当量长度计算当量长度选取数量5.25.56.47.07.62.7212.722.752.863.13.43.703.44.04.64.95.501.831.952.22.322.5010.211.311.314.415.805.25.56.47.07.602.752.863.13.43.7011900.980.980.980.980.98043.049.058.064.073.0043.001.071.221.441.621.86010.712.214.416.218.6021.324.429.034.037.002.72管道公称直径DN真空系统管件和阀门当量长度（m）12总当量长度计算当量长度选取数量总当量长度计算当量长度选取数量总当量长度计算当量长度选取数量0000000000000000000000000000000000000000000002345总当量长度计算当量长度选取数量总当量长度计算00000000000000000000000000000065