This is currently being done commercially now. It hasn't caught up yet to the
home (domestic) market as it should, but I've seen the numbers and they are
promising. A large warehouse I know of in Frederick, MD, has such a system and
their heating/air conditioning bill is about $50 a month compared to a
conventional system in a comparable size building of about $450 a month. The
initial expense is a bit higher though, but it has already paid off. Plus, no
Freon involved.

I have spray nozzles on two sides of my outdoor condenser unit that sprays well
water on the coils when the compressor comes on. This has made a noticeable
difference in the time the compressor runs (less on time and less cycling) when
cooling the house during the summer. I'm getting ready to make some measurements
to see just how much of a savings this will make.
Rick

Rod Phillips wrote:

> Hello to all,
>
> Here's an idea that I wanted to run past whoever is interested.
>
> I have 2 unused water wells on my property that are seperated by 100 feet.
> One well has a 30 inch diameter concrete casing and is 36 feet deep.  The
> other well has an 18 inch diameter casing and is about 25 feet in depth.
>
> My idea is to pump water from well # 1 into a small, insulated pressure
> tank.  At the tank outlet would be a solenoid valve to let the water flow
> into some sort of heat exchanger in the furnace plenum.  Another valve would
> be located on the other side of the heat exchanger to discharge the warmed
> water into the second well.  The plan would be to monitor air temperature in
> the plenum and when it has reached a certain limit open both valves to force
> the warmed water out.  Additional temperature probes in the input and output
> lines could be used to determine when the exchanger is full of cold water.
> I have a probe in well # 1 now and the water temperature is 51 degrees.
>
> I would welcome any comments or experiences anyone has had along these
> lines.
>
>                                    Rod
>
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