Question

某取水泵站从水源取水,江水送至净水池.已知水泵流量 Q=1800m \h ,吸、压水管道均为钢管,吸水管长L=15.5m

Answer 1

流量 Q=1800 m^3/h =0.5 m^3/s

抽升高度 h = 89.45-76.83 = 12.62 m

DN=500mm钢管的比阻 S1=0.06839 ,DN=450mm钢管的比阻 S2=0.1195

水泵扬程 H = h+1.15S1L1Q^2+1.15S2L2Q^2

=12.62+1.15*0.06839*15.5*0.5^2+1.15*0.1195*450*0.5^2 = 28.4 m

水泵轴功率 P=9.8QH/η=9.8*0.5*28.4/75% = 185.5 kW