TOTAL HEAD CALCULATION

[Matthew Arnold]

How exactly do I calculate the head of the pump considering the pump is already running.

I figure the pump running would have contributed to both the pressure and velocity heads in some way. I just don't think the calculations are as straightforward as finding the pump head needed for a system that needs a pump to obtain a certain velocity.

I put an image with the data I collected.

Ive been using bernoulli's equation.

 

[mk3223]

Check the link below for an example how to calculate the pump head from the google search.
Good luck.

https://www.pumpfundamentals.com/tutorial3.htm

 

[LittleInch]

What though is the purpose of your test?

Normally Total developed head is simply the difference between outlet pressure / head and inlet pressure/head measured in absolute terms in pressure ( use KPaa and then converted to metres or feet head of your liquid.

As you have different frequencies you normally just plot speed vs flow and TDH.

Velocity head is usually ignored, but at such small pressures might become important.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[nondimensional]

For academic purposes, velocity head should NOT be ignored.

Also, gauge elevation correction should be accounted for as well (z term in Bernoulli's).