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CALCULATE MOTOR PUMP SIZE

CALCULATE MOTOR PUMP SIZE

  • Calculate Size of Pump having following Details
  • Static Suction Head(h2)=0 Meter
  • Static Discharge Head (h1)=50 Meter.
  • Required Amount of Water (Q1)=300 Liter/Min.
  • Density of Liquid (D) =1000 Kg/M3
  • Pump Efficiency (pe)=80%
  • Motor Efficiency(me)= 90%
  • Friction Losses in Pipes (f)=30%



CALCULATIONS:
  • Flow Rate (Q) =Q1x1.66/100000=300×1.66/100000=0.005 M3/Sec
  • Actual Total Head (After Friction Losses) (H) = (h1+h2)+((h1+h2)xf)
  • Actual Total Head (After Friction Losses) (H)=50+(50×30%)= 65 Meter.
  • Pump Hydraulic Power (ph) = (D x Q x H x9.87)/1000
  • Pump Hydraulic Power (ph) = (1000 x 0.005 x 65 x9.87)/1000 =3KW
  • Motor/ Pump Shaft Power (ps)=ph/pe=3/80% = 4KW
  • Required Motor Size: ps / me=4/90% = 4.5 KW
  • Required Size of Motor Pump = 4.5 HP or 6 HP

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