[90855] in North American Network Operators' Group
Re: WSJ: Big tech firms seeking power
daemon@ATHENA.MIT.EDU (Petri Helenius)
Fri Jun 16 23:59:07 2006
Date: Sat, 17 Jun 2006 06:58:28 +0300
From: Petri Helenius <pete@he.iki.fi>
To: wb8foz@nrk.com
Cc: nanog list <nanog@merit.edu>
In-Reply-To: <200606170039.UAA16283@sigma.nrk.com>
Errors-To: owner-nanog@merit.edu
David Lesher wrote:
>
> I don't know the area; but gather it's hydro territory?
>
> How about water-source heat pumps? It's lots easier to cool
> 25C air into say 10-15C water than into 30C outside air.
>
> Open loop water source systems do have their issues [algae, etc]
> but can save a lot of power....
>
If you drill a vertical hole in the order of 50-200 meters deep, the
cooling effect of water pumped through a pipe in that hole is in the
order of 50W/m. So you can lose 10kW of heat into 200 meter hole. Not
sure what the separation needs to be for this to be sustainable. Pretty
good return on investment, considering drilling a hole is $3k-$6k.
Pete
>
>
