Pump power estimate
Pump Power Estimate
Calculates hydraulic, shaft, and motor power for a centrifugal pump.
Inputs
Q:=50m^3/h=0.49 ft^3/s
Volumetric flow rate
Total dynamic head
H:=30m=98.43 ft
rho:=1000kg/m^3=62.43 lb/ft^3
Fluid density (water)
g:=9.81m/s^2=32.19 ft/s^2
Gravitational acceleration
Pump hydraulic efficiency
eta_pump:=75%=0.75
Motor efficiency
eta_motor:=92%=0.92
Calculations
Q_si:=(Q)/(3600)=1.36e-04 ft^3/s
Flow rate converted to m³/s
Hydraulic (water) power (W)
P_hydraulic:=rho·g·Q_si·H=1.52e-03 hp
P_shaft:=(P_hydraulic)/(eta_pump)=2.03e-03 hp
Pump shaft power (W)
P_motor:=(P_shaft)/(eta_motor)=2.21e-03 hp
Motor input power (W)
Results
P_hydkW:=(P_hydraulic)/(1000)=1.52e-06 hp
Hydraulic power (kW)
P_shaftkW:=(P_shaft)/(1000)=2.03e-06 hp
Shaft power required at pump (kW)
P_motorkW:=(P_motor)/(1000)=2.21e-06 hp
Motor input power required (kW)
Text styles
Customise how each style looks on this sheet. Changes apply to all regions using that style.