Pump discharge is given as 1000GPM & 17.6 Bar pressure output. HOW TO SELECT THE MOTOR . WHAT WILL BE THE KW ?

Question

Pump discharge is given as 1000GPM & 17.6 Bar pressure output. HOW TO SELECT THE MOTOR . WHAT WILL BE THE KW ?

Answer 1

The other answer is a bit off.  Take a look at :http://www.tasonline.co.za/toolbox/pump/...

You will find that the motor will need to be about 155 horsepower, 115 kW

Answer 2

You need to get the pump curves to accurately size the motor. Typical estimate is:

Power = Pressure * Volume / efficiency

First, convert units:

17.6 bar = 255psi

1000 gal/min = 134ft³/min

Now, use P = pressure * volume

255 lb/in² * 134 ft³/min * 144in²/ft² = 4.9 million ft*lb/min

Now, convert to kW and increase power for efficiency:

4.9 million ft*lb/min /(33000 ft*lb/HP) / 0.85 efficiency * 0.746kW/HP

= 175 HP or about 131kW.

Edit: fixed arithmetic in last step.