Water Pump Efficiency Formula

H total head. P power horse power h head ft q flow gpm sg specific gravity pump efficiency decimal p power kw h head m q flow m3hr sg specific gravity pump efficiency decimal.

Pump Performance Curves Enggcyclopedia

Learn how to monitor and calculate pump performance by using the three parametersflow pressure and power consumption.

Water pump efficiency formula. Water horsepower is determined by the flow rate and pressure delivered from the pump. G acceleration of gravity. Pump efficiency pump efficiency is defined as the ratio of water horsepower output from the pump to the shaft horsepower input for the pump.

Quick formula water horsepower minimum power required to run water pump tdh total dynamic head vertical distance liquid travels in feet friction loss from pipe q flow rate of liquid in gallons per minute. The overall efficiency of a centrifugal pump is simply the ratio of the water output power to the shaft input power and is illustrated by the equation below. The shaft horsepower input for the pump.

E f p w p s where. Pump efficiency is defined as the ratio of. The pump data submitted was flow head power and efficiency.

Overall efficiency is used to calculate the drive power required by a pump at a given flow and pressure. Pump from the power unit which usually. Q flow rate or discharge.

P v vapor pressure of fluid or liquid. V velocity of fluid or liquid. On the pumping plant and water may be wasted.

Is an electric motor or internal combustion. Sw specific weight of fluid or liquid. Rate and pressure delivered from the pump.

P impeller inlet pressure. The shaft horsepower is delivered to the. Water horsepower output from the pump to.

The shaft power the power required transferred from the motor to the shaft of the pump depends on the efficiency of the pump and can be calculated as p skw p hkw η 3 p skw shaft power kw η pump efficiency. For example let us calculate in si units the required drive power for an external gear pump with an overall efficiency of 85. The shaft horsepower is delivered to the.

So continuing with the above example the overall efficiency of the pump is 09 x 091 x 100 82. Imperial units si units. Npsh net positive suction head.

The doe used this information to determine the baseline standards and life cycle cost lcc analysis. Water horsepower is determined by the flow. To establish baseline pump efficiency requirements over more than 20 manufacturers submitted data on the five pump types which resulted in more than 3000 unique pumps.

Pdf grundfoscalculating pump efficiencytopic 1task 4pdf size. Bhp brake horsepower. N pump efficiency.

Pump Terms And Definitions