Centrifugal pump is a machine that helps in lifting water or any other liquid from lower level to higher level. Such types of pumps are used for a variety of applications such as waterfalls, founta...
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Jowesh Goundar - S11076586
What is the fundamental equation of centrifugal pumps? What are the terms involved and what is the importance of this equation? A centrifugal pump is a device or equipment which converts kinetic energy to pressure energy by a rotating impeller. The simplest explanation is then can be written as a device which generates an increase in pressure of the fluid by transferring mechanical energy of motor to the fluid by the action of rotating impeller.
Figure 1: Working principle of a centrifugal pump The fluid flows from the inlet to the suction eye or the impeller centre and out along the vanes. The kinetic energy from the rotating impeller is transferred to the water in the form of its pressure energy thus increases pressure Head. The equations related to a centrifugal pump are: The head of the pump can be calculated as:
Jowesh Goundar - S11076586
Here: H=total head developed in metre P2 = pressure at the outlet [Pa or N/m2] P1 = pressure at the inlet [Pa or N/m2] (
) (
)
( )
The overall efficiency of the pump is given by the equation:
Where,
[ [
⁄ ] ]
These equations are important since it indicates the maximum head of the pump and the shaft power required to impart the fluid to that head. This therefore, indicates the overall efficiency of the pump.
