風(fēng)管水力計(jì)算書

P(Y)-B4-2排煙排風(fēng)系統(tǒng)的風(fēng)管水力計(jì)算：計(jì)算公式：λ=0.11*(K/De+68/Re)^0.25Pm=λ/De*ρ*v^2/2編號(hào)風(fēng)量流速寬度高度管長比摩阻局阻摩阻局阻動(dòng)壓阻力(m3/h)(m/s)(mm)(mm)(mm)(Pa)系數(shù)(Pa)(Pa)(Pa)(Pa)111657.92.885003207.420.270.241.971.194.973.17103315.84.576303209.630.560.245.393.0112.528.3994973.75.48003206.850.690.244.764.1917.488.9586631.65.7610003206.420.730.574.6711.3319.881676631.65.7610003205.180.7303.77019.883.7768289.57.210003206.231.10.1776.885.531.0712.3858289.55.7610004001.580.590.1770.943.5219.884.4648289.55.7610004004.340.590.1772.573.5219.886.0938289.55.7610004003.20.5901.9019.881.9221552.667.9815005005.940.780.14.623.8238.238.451315009.7218005003.911.0704.19056.714.19小計(jì)315009.7263.410.6843.2739.682.87故：P=82.8+100+80+50=312.8<467Pa，滿足要求。注:風(fēng)口阻力≈50Pa，防雨百葉阻力≈80Pa，風(fēng)機(jī)機(jī)房阻力≈100Pa管段編號(hào)圖：P(Y)-B4-3排煙排風(fēng)系統(tǒng)的風(fēng)管水力計(jì)算：計(jì)算公式：λ=0.11*(K/De+68/Re)^0.25Pm=λ/De*ρ*v^2/2編號(hào)風(fēng)量流速寬度高度管長比摩阻局阻摩阻局阻動(dòng)壓阻力(m3/h)(m/s)(mm)(mm)(mm)(Pa)系數(shù)(Pa)(Pa)(Pa)(Pa)72423.14.215003209.240.530.244.932.5510.627.4864846.25.268003207.610.660.245.033.9816.599.0257269.26.3110003207.520.860.246.495.7323.8912.2349692.36.7312503205.860.920.285.377.6127.1812.98312115.446.73125040012.680.740.179.354.6227.1813.97214538.558.0812504006.351.0406.59039.146.591315009.7218005004.761.0705.1056.715.1小計(jì)315009.7254.020.7942.8624.4967.37故：P=67.3+100+80+50=297.3<467Pa，滿足要求。注:風(fēng)口阻力≈50Pa，防雨百葉阻力≈80Pa，風(fēng)機(jī)機(jī)房阻力≈100Pa管段編號(hào)圖：P(Y)-B3-2排煙排風(fēng)系統(tǒng)的風(fēng)管水力計(jì)算：計(jì)算公式：λ=0.11*(K/De+68/Re)^0.25Pm=λ/De*ρ*v^2/2編號(hào)風(fēng)量流速寬度高度管長比摩阻局阻摩阻局阻動(dòng)壓阻力(m3/h)(m/s)(mm)(mm)(mm)(Pa)系數(shù)(Pa)(Pa)(Pa)(Pa)722502.448003206.530.160.571.062.043.583.09622502.4480032015.780.160.242.550.863.583.41567505125040039.340.420.5716.668.551525.21490004.46140040018.720.330.576.226.8211.9613.03390004.4614004002.850.330.570.956.8211.967.76290004.4614004008.780.33-0.952.92-11.3611.96-8.441315009.7218005001.451.0701.55056.711.55小計(jì)315009.7293.450.3431.9113.7345.61故：P=45.6+100+80+50=275.6<467Pa，滿足要求。注:風(fēng)口阻力≈50Pa，防雨百葉阻力≈80Pa，風(fēng)機(jī)機(jī)房阻力≈100Pa管段編號(hào)圖：P(Y)-B3-3排煙排風(fēng)系統(tǒng)的風(fēng)管水力計(jì)算：計(jì)算公式：λ=0.11*(K/De+68/Re)^0.25Pm=λ/De*ρ*v^2/2編號(hào)風(fēng)量流速寬度高度管長比摩阻局阻摩阻局阻動(dòng)壓阻力(m3/h)(m/s)(mm)(mm)(mm)(Pa)系數(shù)(Pa)(Pa)(Pa)(Pa)1121002.896303209.310.240.242.251.215.023.461042004.568003207.460.510.243.782.9912.466.78963005.4710003208.560.660.245.664.3117.949.97884005.8312503207.410.70.245.194.920.4210.097126007125040011.530.790.579.1516.7629.425.91612600712504000.730.790.570.5816.7629.417.34512600712504001.660.790.571.3216.7629.418.08412600712504001.80.790.241.437.0629.48.483147006.8115004007.50.710.25.365.5627.7910.922189009.1118003209.761.50.25514.612.7149.8527.311315009.72180050011.41.0701