Hybrid Car – More Fun with Less Gas

Re: Preheating water by running pipes through attic? - Page 2

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Posted by Chuck on August 10, 2008, 12:18 am
JIMMIE wrote:

Why don't you bury the pipes in the driveway? I did this in Florida and had very
hot water all the time. I had a black asphalt driveway and before they installed
it, I buried copper pipe in the sand. After the asphalt was put down and cured,
I found that I had plenty of very hot water. Since the water heater tank was
just inside the garage, it was easy to get the water back into the tank.

Posted by News on August 10, 2008, 11:03 am

I hope the copper pipe was protected.  Plastic pipe would be better, all in
one large coil.

Posted by HeyBub on August 10, 2008, 8:27 pm
 Chuck wrote:

Heh! That's a great idea. Sort of a poor man's geothermal power station.

Posted by aemeijers on August 10, 2008, 11:14 pm
 HeyBub wrote:

Cute idea, but up north here in frost heave country, those copper pipes
wouldn't make it through one winter. PEX, maybe. And you'd have to fill
with antifreeze and use a heat exchanger setup, to keep them from
freezing solid, unless you put them so deep that it was residual ground
heat you were sucking instead of solar.

When I lived in southern Indiana, with abandoned water-filled limestone
quarries all over the place, I had a dream of buying one, and dropping a
heat exchanger on the bottom to get free cooling for a/c. Of course, I
was a broke student at the time, so it stayed in the dream stage.

aem sends...
aem sends...

Posted by Heathcliff on August 11, 2008, 9:27 pm




That reminds me of a funny story I guy once told me.  He had lived for
a while in a trailer park in southern Arizona.  The service lines to
the trailers were only buried about 6 inches deep, in ground that
baked in the sun all day, so the water supply that came into the
trailer was HOT.  This was a problem in that you could not take a
shower without getting scalded -- no cold water to blend in with the
hot.  Finally his neighbors clued him in -- the solution was to turn
off your water heater.  Then the water in it would cool down to your
air-conditioned indoor temperature and be your cold water supply.  -- H

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