1

The 24th

week

Pumps and Turbines

As mentioned before the pumps add energy to the liquid while the

turbines take energy. The energy equation of flowing system( as shown in

the fig.) contains both of them will be:

Where:

- Section 1 and 2 will be before and after pump or turbine

respectively.

- EP, and ET= energy added by pump.

Ep. = weight of fluid added (W) X hp,. units= N. m

hp= head added by pump, units= N. m/N

- ET= energy removed by turbine.

ET = weight of fluid removed(W) X ht,. units= N. m

hT= head removed by turbine, units= N. m/N

the power of pump or turbine in watt units is:

Prp= Qhp

Prt= Qht

2

3

Pr. 1