名称管段始端压力管段始端温度蒸汽流量管段始端蒸汽密度管段始端蒸汽比容管段始端蒸汽焓值管段末端允许压力假定管段末端允许温度假定管段末端蒸汽密度假定管段末端蒸汽比容假定平均压力平均比容管道流速计算抽汽管道管外径假定抽汽管道管内径抽汽管道壁厚介质动力粘度介质运动粘度雷诺系数管道等值粗糙度管道相对粗糙度管道摩擦系数管道弯头个数管道上阀门个数单个弯头局部阻力系数弯头处局部总阻力系数止回阀局部阻力系数闸阀局部阻力系数管道局部阻力系数管道沿程阻力系数管道总长管道阻力系数管道压降管道压降终端管道实际压力管道压降比值
符号p1t1Gρ1
单位Mpa
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th
kgm3m3kg
υ1
h1p2t2ρ2
kjkgMpa
℃kgm3m3kg
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ppj
Mpam3kgmsmmmmmmPas
m2s
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f公
式
数值1Φ426x8085290603749502667022273032052602437704102227510675
Vpj05υ1υ2wGυDi000159472
查汽规P162165页γη1υ1RewDiγ查汽规P166页εDi查汽规P39页莫迪图每90米一个π弯闸阀1只ξj120λ单个弯头阻力系数ξjw
1ξj1弯头局部阻力系数rd1查汽规止回阀门阻力系数：LDi50查汽规闸阀阻力系数ξjfξj21ξj3ξjξjwξjfξyλLDiξtξjζyΔP1ξtw22υ△p11△p11000000阻力预留10预量P2P1ΔPΔpp1
03384624894272577585426410819800E05528E06332E0603000073170700186010362160025025218570243902441600920939024424835348150273188830576811170321398623
f数值1Φ426x8075290503345502989089823034705260243770410222751062503545658673729881999426410819800E05592E06258E060300007317070018601036216002502521857024390244160092093902441806733682019874070505512592950264987607
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