Pump Power Calculations (SI Units)

Absolute Pressure at the suction vessel, Ps    kPa
Liquid level at the suction vessel from the pump suction end, Zs    m
Pressure drop due to friction at the suction piping (incl valves etc), Fs    kPa
Absolute Total Pressure at Pump Suction, TPs    kPa
Absolute Pressure at the discharge vessel, Pd    kPa
Liquid level at the discharge vessel from the pump discharge end, Zd    m
Pressure drop due to friction at the discharge piping (incl valves etc), Fd    kPa
Absolute Total Pressure at Pump Discharge , TPd    kPa
Differential Pressure, DP    kPad
Differential Head, Hd    m
Safety Factor, SF (eg 10%)    %
Required Differential Head, Hdr    m
Liquid Flow Rate, Q    m3/hr
Density of the fluid at average flowing conditions, rho    kg/m3
Hydraulic kilowatts, hydKW    kW
Pump efficiency, pe (fraction)    (0 to 1)
Brake kilowatts, bKW    kW