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#1 MaterialBalance14

MaterialBalance14

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Posted 05 February 2010 - 01:47 PM

hi, can someone please tell me or show the proof for why if you double the height you want to pump something to the energy required for the pump increases by 4 times?

Thanks.

#2 latexman

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Posted 05 February 2010 - 02:18 PM

Brake horsepower = GPM x Head (ft) x s.g./3960/Efficiency

Assume constant flow, GPM.

If the destination (end of the pipe) is 2X the height away, you will have 2X the hydralic head to overcome AND the frictional pressure drop will double because the pipe is 2X as long. That's the simplistic view. However, what if the pipe is large for the flow and pressure drop is essentially nil compared to the hydraulic head. Then, it doesn't quite work out that way.

#3 S.AHMAD

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Posted 10 February 2010 - 10:57 PM

Hi

Can you tell us more where did you get the information from? I am curious since I do not believe the statement is true.




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