Energy efficient pumps. [RE-wrenches]

[Tom Lane, Energy Conservation Services]

Taco p umps are as good as Qrundfos and often more energy efficient with a
replacement cartridge and  Taco is friendlier to the solar distributor ==
not requiring as large an inventory to be carried --- March 809 oiless
series at 100 hp is a great little series of low cost efficient pumps  gator
tom----- Original Message -----
From: "Robert Warren" <robertwarren at mail.com>
To: <RE-wrenches at topica.com>
Sent: Monday, March 03, 2003 3:32 AM
Subject: RE: Energy efficient pumps. [RE-wrenches]


> John,
>  The industry standard, as far as the solar water heating business is
> concerned, are the Grundfos Pumps, such as the UP-15, which has a
> stainless steel body and is only 1/25th hp, so it only draws about 30-35
> watts. It only handles a 7 foot head, but is fine for closed loop
> radiant systems. I have used 6 or 8 of them to circulate radiant warm
> water through a fairly large house, and it is by far the cheapest way to
> move heat. But you are right in criticising plumbers who are so used to
> dealing with grid tie houses, and don't know a better way, as they have
> never had to worry about keeping batteries topped off. I never liked the
> El Cids: far too noisy.
>  Another thing you should check out in terms of designing radiant
> systems to be more efficient are the Tekmar line of controls. They are
> expensive, but have a diversion valve which allows you to provide the
> precise temperature you need to add, so you don't go through the too
> hot--too cold cycles of trying to heat a house. Radiant heat from the
> floor is the most comfy way to go, by far.
> Robert Warren
>
>
> John Blittersdorf, Cent. VT Solar & Wind wrote:
> > Group,
> >    Probably a year or so ago, someone in our group mentioned doing lots
of
> >    work coming up with energy efficient pumping designs... pumps,
manifolds
> >    etc.
> > for radiant floor heating and/or baseboard hot water heat.  I would like
> > to  contact that person as I am finding that pump loads are getting out
> > of hand
> > with some of my off grid systems... It seems that plumbers think that a
> > whole
> > wall full of pumps is normal!!!!
> > I think that 500 to 600 watts to move a little water around is too much.
> >  I
> > know that the ELCids can be used in some applications but would like to
> > know
> > what other pumps are available. Any info would be appreciated.
> >
> > John Blittersdorf
> > CVSolar
> > 213 N.Main St.
> > Rutland, VT 05701
>
>
>
> What will we do if there is another fuel shortage?
> Did you know that there is a pollution free, completely
> renewable fuel which you can use right now in your own car?
> Don't replace the engine, replace the fuel.
> Check out my website on making your own fuel:
> http://running_on_alcohol.tripod.com
> robertwarren at mail.com
>
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