Question

Q2 (12): Th and parallel pipes BC and BD. The head loss between the lower reservoir and the pump can be ignored. The Darcy friction factor of each pipe is f 0.022. If the flow in pipe AB is 0.20 m'/s and AZ is 10.4 m, determine the total head of pump. What is daily power input (in the unit of Kw-hr) if the pump is running at 80% efficiency? e system shown in the following figure consists of two reservoirs, a pump, pipe AB, Pipe AB BC BD Diameter (mm)Length (m) 450 200 300 2000 900 1000

Answer 1

人乙 Given ha → 'The head loss between lousy negervair and the pump ignored → Darcy ochon Pactor for cach pipelet-o.ou → eee i ciency of pipe =80%

Also ven that LAR= 2000 m we Knoc that, → Total di elev ential head = gratic head citlerence trictional hed korses @ And, hese → trech onal head Lo ss: eYic tional headless o ARictional head las in BC (or) Psicional head oss in B0 iote: heve use con gidex icion head lbss n Gc or eD only one of hem becauge they ove in pasollel. ·· un cas eof Series Pipes/ tata! head loss Som ot head loss in each pat 1n case of payalle! ripes, total head lots ニloss ,in any one pavallel ripe.

So rictional head loss in fipe AL sictiona heas Ar 2

Frictional head loss in Pipe e Fsictiona head oss Pipe 20 2L しse know thal- lyictional head loss in pipe RC and D both Same 3o 2c

hexe, eo1 20 B0 748-062 Poom (D andのwe have here, h= 74-8-062 O. S112-3 so, aBC_ +0-38 0,055 m3/g hou, erichon head loss in Rc= Rgcx (Q20. =15.46 m

fcom case have, Total dieperential heado TI+S4 26.578 m Total head pomp26 g m Pouwer inputx H (m) x epeciftic gravity C3.61 x ellicien) "720 × 26, 578 x 1 (2.61x 80