302-P-002
计算依据:化工原理上册输送介
甲醇
质:
输送介质物性参数t1℃ρ2kg/m3mPa.s3μ4567P1P2P3P4MPaMPaMPaMPa甲醇去装置泵
介质温度输送温度下介质密度输送温度下介质粘度输送温度下介质饱和蒸汽压力输送起点容器压力输送终点容器压力输送终点要求压力40100010.00060.100.100.16绝压绝压绝压表压（含位差）泵进口计算1QDN2d外3σ4d5u67101112131314ReeελL1L2Lhfm3/hmmmmmmmmm/smmmm 液柱NPSHam 液柱泵的体积流量泵进口管公称泵进口管外径泵进口管壁厚泵进口管内径泵进口流速雷诺数管材绝对粗糙度管材相对粗糙度磨擦因数直管段长管件当量长度总管长度管道磨擦阻力损失泵的有效净正吸入压头60.00804.5803.317Q/[3600*0.785*(d/1000)2]265392.781d*u*ρ/μ30.150.00382e/d0.023691530457.52.66λ*L*u2/(2dg)（P2-P1）/ρ/g-hf泵扬程计算1QDN2d外3σ4d5u67101112131314ReeελL1L2LhfHQHm3/hmmmmmmmmm/smmmm 液柱m 液柱m3/hm 液柱泵的体积流量泵出口管公称泵出口管外径泵出口管壁厚泵出口管内径泵出口流速雷诺数管材绝对粗糙度管材相对粗糙度磨擦因数直管段长管件当量长度总管长度管道磨擦阻力损失泵的扬程所选泵的体积流量所选泵的扬程601501595.51480.969Q/[3600*0.785*(d/1000)2]143455.557d*u*ρ/μ50.150.00202e/d0.02137100501501.017.046019λ*L*u2/(2dg)（P4+P3-P2）/ρ/g+hfNKW功率5.8735359.81834Re1672230.9547Re2流态判断0.0002411520.0070493280.0139400460.0236856090.023013032Re≤20002000Re2层流区层流流态过渡区（流态不稳定，水力光滑区混合摩擦区紊流流态粗糙区71424.81815Re11344457.877Re2流态判断0.0004461310.0082213030.0162576260.0213748880.019691288Re≤20002000Re2层流区层流流态过渡区（流态不稳定，水力光滑区混合摩擦区紊流流态粗糙区
