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Improving circulator efficiency
hot_rod
Member Posts: 23,398
Squirt this abrasive goo thru the volute to polish them up.
Wish I had this stuff in my go-kart and snowmobile days. We ported and polished two strokes with emery and steel wool, sort of.
Wish I had this stuff in my go-kart and snowmobile days. We ported and polished two strokes with emery and steel wool, sort of.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream
trainer for Caleffi NA
Living the hydronic dream
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Comments
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I’ve seen that stuff. Cleans manifolds etc. pretty slick idea. No pun intended.0
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A typical circulator pump is very efficient - maybe 90%. The 10% efficiency loss becomes heat, which adds to the heating system's supply. The motor has additional inefficiencies, of course.
The hydronic pump impellers I've inspected are usually clean and smooth. Many modern impellers are bronze, nylon, or plastic. I'm unsure what this product would do to improve pump efficiency.
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I've read typical wet rotor PSC circulators that we are familiar with run in the mid 20% efficiencies. That is IF they are running mid curve. When I see a job with a wall of circs, one wonders how many are running mid curve? Some probably running in the 10% range.
Electric motor technology ECM, is about as efficient as it can get right now, pump manufacturers are looking to keep increasing efficiencies to meet energy standards in Europe, and the hydraulics of the volute may be a place to pick up some gains.
Seems easy enough to squirt some abrasives thru the volute and get a mirror finish.
https://www.pmmag.com/articles/90123-the-incredible-shrinking-circulator-br-john-siegenthaler-p-eBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream1 -
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Funny how that article was 11 years+ ago and the plain old fixed speed circ is still the most common. Did the "microcirculator" discussed near the bottom ever go anywhere?hot rod said:0 -
"I've read typical wet rotor PSC circulators that we are familiar with run in the mid 20% efficiencies."
That must be a total misunderstanding or a ridiculous joke. No circulator efficiency could be near that low, even with the motor efficiency. Nonsense.0 -
Oh it could easily happen with the wrong sized circulator. Like that never happens................0
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No, it couldn't - impossible. Sorry.0
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Really?0
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I can tell you a three piece circulator adds about zero heat to the system. It adds it to the space it occupies which is usually not inhabited by only the person who works in the boiler room.
Even a wet rotor psc does not add all its heat to the system.0 -
The wire to water efficiency, amount of electrical energy required to more the required gpm to the load.
This example defines a typical circuit, at 5 gpm flow rate, plots it on a common name brand pump curve, establishes the OP and then uses an efficiency curve overlay to show operating efficiency.
If you have other numbers, show us.
https://www.pmmag.com/articles/100760-properly-sizing-and-operating-circulatorsBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream-1
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