"NetMax" wrote in message
...
At the risk of getting too far OT from aquaria, I have wondered what
volume of subterrainian water would be required to cool and heat a home to
an average comfortable temperature. Given my latitude (Canada), I don't
think it's practical, but a bit further south might have possibilities.
Build a road to the edge of a short steep rockface (coastline, riverfront
etc), build a foundation to hold some water (200,000g?), grade with enough
earth for insulating the exposed side, add house on top. You would need
some energy to run the heat pumps, but rockface/coastlines are sometimes
suitable for a combination of wind power and solar (divided between
electricity generation for batteries and water heating to supplement the
thermal energy of the under-house sump.

An interesting angle is that the water would either need to be chemically
treated to be inert, or you could intentionally incorporate a complete
nitrogen cycle (fishies ).
Meh. Just coat the wetted parts with teflon, or make them out of
titanium...

I don't know which would be more practical, but I know which I would
investigate first ;~), though I suspect the temperature range would not be
compatibility to fish.

lol, this should lay to rest any niggley doubts about my being completely
wonkers, - but I still have lucid moments and I'm generally helpful &
harmless ;~).
--

Wonkers? The only thing you're missing is financial backing;

http://www.makai.com/renewable_energy/swac.htm

It seems someone was Wonkers about six years ahead of you...

Seawater AC project has earned a $1.6million grant for a feasability study
at the University of Hawaii. Note; this is a _lot_ easier model, as the
water doesn't need to be pumped nearly so far (nor do you need to drill deep
into bedrock, etc).

Regards
DaveZ
Atom Weaver