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meshri
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Join Date: Dec 2007
Posts: 11

pump efficiency

12/30/2007 5:43 AM

I have to check the efficiency of a centrifugal pump, please help me how can do this job?
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ducon
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Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
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#1

Re: pump efficiency

12/30/2007 8:21 AM

Fit a flow meter, a pressure gauge, a temperature meter, a electrical meter, a hour meter, a timer. Sit and check out each data every 15 min . restart . stop. restart. After 100 tests you graph the pump flow n efficiency.

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meshri
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Join Date: Dec 2007
Posts: 11
#2
In reply to #1

Re: pump efficiency

12/30/2007 8:40 AM

Thank you,

I will make graph against discharge pressure Vs Flow rate, Power Vs Flow rate. Now how to calculate head in order to calculaate efficiency?

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KOTIAN
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Join Date: Aug 2007
Location: Karnataka India
Posts: 11
#3
In reply to #2

Re: pump efficiency

12/31/2007 12:32 AM

Efficiency is output power/input power.Calculate the Hydraulic Power of pump using head,flow rate ( refer text books for formula).Delivery Head is the height from center of the pump to the top of the tank where it is pumped.Record Input power using power analyser.Take motor efficeincy also to consideration.

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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#4

Re: pump efficiency

01/02/2008 4:34 AM

Pump efficiency = pressure gain x volumetric flowrate x 100% / electrical power input

all expressed in compatible units.

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