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Ground Loop Heat Transfer Question - Page 2

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Posted by Robert Scott on September 3, 2006, 6:54 pm
On Sun, 03 Sep 2006 10:35:40 -0700, Anthony Matonak

I think the problem there would be the large thermal time constant of that much
dirt.  It would not heat up in one day.  To be effective you would have to cover
the ground with much better insultation overnight so that the heat collected
from one day could be added to the heat collected during the next day.

Robert Scott
Ypsilanti, Michigan

Posted by SJC on September 3, 2006, 10:12 pm

    I might think in terms of a thermal store in the basement. Perhaps
contiguous containers around the sides of the basement that would be
against the wall and out of the way. The idea would be to use these as
a thermal store during the summer when the water source heat pump cools
the home and puts the heat in the thermal store, then use the heat in the fall.
As you start to use the heat, you replace it using the solar thermal collectors.

Posted by daestrom on September 4, 2006, 4:04 pm

It is interesting to note that in cold climates, the ground freezes down
further/deeper when there is no snow cover, than when there *is* snow cover.

When in sub-zero temperatures, the ground covered with snow is close to 32F,
while the ground *not* covered with snow can be much colder.

One year with very little snow fall, the local city had trouble with city
water mains freezing.  Something they don't normally have a problem with
since they are buried about six feet down.  (admittedly, we had a week of
below zeroF temperatures with below -20F at night).

But I guess as long as the energy gained by such a system is more than
'mother nature', it would help.


Posted by Jack on December 15, 2006, 12:14 am

Snow is a reasonably good insulator. Ask an Eskimo.


Posted by Solar Flare on December 15, 2006, 3:09 am
 I will never defrost my freezer again then. Two feet of snow is a good

Let's say "relatively good insulator"

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