What is a Pumping System Efficiency Calculator?

If a person wants to determine the wire-to-wall efficiency of a pumping plant, as well as determine the mechanical efficiency of an electric motor- driven centrifugal pump serviced by a three-phase power supply, he could use the Pumping System Efficiency Calculator.

The purpose of the Pumping System Efficiency Calculator is to:

• Measure pump discharge pressure (in psig)


• Measure pump suction pressure (in psig), or sound the well so that you can calculate your pumping water level and static lift (in feet).


• Measure pump flow (in gpm).


• Figure column friction head losses (in feet).


• Put in the particular gravity of the water being pumped.


• Put in the horsepower, synchronous speed, full-load efficiency and enclosure type for your pump drive motor. 


• Measure the input power to your pump motor.

The wire-to-water efficiency of the pumping plant is the ratio of the water-horsepower furnished by the pumping plant. This is equivalent to the amount of water or other fluid being transferred (in gpm) at the functioning pumping head (in feet). This is divided by the electrical power provided to the pump drive motor. (Input kw to be converted to input hp) The more decided the general efficiency is, the lower your complete pumping costs should be. One other way to tell if it is performing as it should, is the quantity of water delivered, in gallons, per kWh of electrical energy used.

Pumping plant operators conduct efficiency tests to identify inefficient systems, to schedule pumps, figure energy efficiency improvement measures, and to figure potential energy savings. These tests are usually conducted on larger pumps that work more frequently than others.