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Anonymous Poster

High Efficiency Pumps

01/03/2011 2:15 PM

Hi all, I have heard that there are centrifugal pumps out in the market that are highly efficient (the trade off is that they are more expensive and have a longer lead time), I wanted to ask what did the manufacturer do that makes these pumps more efficient than your general centrifugal pumps? Or is there a brand that focuses on making highly efficient pumps (Apparently Sundyne's pumps are known for their high efficiencies, can some one confirm from their experiences?)?

Thanks all!
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Tornado
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#1

Re: High Efficiency Pumps

01/03/2011 7:39 PM

I didn't find their efficiencies, but it seems that Sundyne specializes in high-head pumps (over a mile!), running at high rpm. Interesting....

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Anonymous Poster
#2

Re: High Efficiency Pumps

01/04/2011 8:52 PM

Most centrifugal pumps in industry seem to operate at only 75% efficiency at best.

I don't know the fundamental philosophical reason why pumping a liquid should be any less efficient than the 95% possible doing the "reverse" with an impulse turbine (Pelton wheel) or the 85+% possible with centrifugal flow adiabatic compression.

It's hard to believe _this_ amount of waste somehow escaped scrutiny.

Bret Cahill
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34point5
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#3
In reply to #2

Re: High Efficiency Pumps

01/05/2011 12:12 AM

Most centrifugal pumps have an intake recirculation loss. It can be designed out, but that is only economical in larger units, or with a more constant set of delivery parameters.

Given "big" and "constant" the axial multistage turbine is often a better choice.

I.e. your centrifugal pump is a cheap cheery and versatile solution and without a huge loss in efficiency.

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