21 Oct
2007
21 Oct
'07
11:28 a.m.
On 21 Oct 2007 at 12:08, Kevin Handy wrote:
This works because the ground below a certain depth is
usually
much cooler than the surface, which is why your grandparents
dug a root cellar to store vegetables and preserves.
I was thinking about big-iron machine room with a heat load of
perhaps 100K BTUs or more. Earth tubes of any practical size just
don't have the capacity for that.
Heat pumps using wells for a heat source or sink are not uncommon for
large-capacity installations.
Cheers,
Chuck