ABSTRACT
The energy delivered to a pump by the driver is spent on useful energy to move the fluid and to overcome losses:
Energy
= Energy
+ Losses (1)
Efficiency = Energy
/Energy
(2)
Losses = Mechanical + Volumetric + Hydraulic (3)
⇓ ⇓ ⇓
bearings leakage (slip) friction coupling entrance/exit rubbing vortices
separation disc friction
From the pump user viewpoint, there are two major parameters of interest:
Flow
and
Pressure
Flow
is a parameter that tells us
how much of the fluid
needs to be moved (i.e., transferring from a large storage tank to smaller drums for distribution and sale, adding chemicals to a process, etc.).
