ground water cooling [RE-wrenches]

Sun Jun 18 06:54:49 PDT 2006

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Hi Conrad,

Depends on the humidity level, I would think.=20
The one we did was in a very wet basement and the=20
fan speed was pretty slow as it was direct=20
coupled to a 50 watt PV panel.  I got more water=20
with the fan than without.

Seems to me ground water cooling should be=20
pursued more.  I've heard of ground water heating=20
through seasonal storage by pumping through=20
wells.  Seems like cooling would be even easier.=20
Of course the pump energy would have to be less=20
than the cooling gained - which is why we did=20
this one - the water runs for many hours/day=20
already.  If one added storage to the system, you=20
could pull more coolth out of the water while=20
also reducing the cycling of well pumps (and=20
reducing hot water bills in summer).

Best,

Jeff C.
Village Power Design

>
>
>We've done the incoming water condensing unit as well, with good success.
>Solar pnael cores and used refrigeration coils work well too.
>No fans directly on the coils though. Wouldn't=20
>the air movement discourage condenstaion?
>
>Conrad
>Cotuit Solar
>508-428-8442
>
>>Hi Wrenches:
>>
>>A simple, relatively cheap, "passive" dehumidifier/AC;
>>
>>Install a copper coil on the intake of your cold=3D20
>>water supply and then install a fan to blow=3D20
>>across it - (either powered by a direct coupled=3D20
>>PV or a AC fan controlled by a flow activated=3D20
>>switch).
>>
>>  Works especially well in public buildings with=3D20
>>commercial kitchens (or places that use alot of=3D20
>>irrigation water) - any where where the water=3D20
>>runs alot.  Not very effective for residential=3D20
>>water conserving households, but if you have a=3D20
>>spare PV panel lying around it's a relatively=3D20
>>cheap free source of coolth/dehumidification.
>>
>>And it works especially well if you have a deep well with nice cold water.
>>
>>We installed one on a conference center with a=3D20
>>commercial kitchen.  They called me in to solve=3D20
>>the sweating pipes syndrome since they used alot=3D20
>>of water and their pipes  dripping with=3D20
>>condensate were causing a real problem in the=3D20
>>basement - so i got to thinking why not make that=3D20
>>source of coolth concentrated.  So Installed=3D20
>>about 25' of 3/4 coiled copper right after the=3D20
>>pressure tank and coupled it to a 50 watt PV=3D20
>>panel and fan.  Pulls about 3-5 gallons of water=3D20
>>out of a humid New England summer day.  And It=3D20
>>warms the water slightly so the sweating is not=3D20
>>such a problem down the line.    Not bad for free=3D20
>>coolth.
>>
>>Jeff C.
>>Village Power Design
>>NABCEP Certified Solar PV Installer=3D81
>>
>>
>>>Hi Todd,
>>>
>>>The issue that Christopher brings up is a very=3D20
>>>real problem and is what caused most of those=3D20
>>>systems to fail.
>>>
>>>I've been told that around 50% humidity is the=3D20
>>>upper limit for a swamp cooler to work.
>>>
>>>Just as an aside, Sante Fe NM, has outlawed=3D20
>>>swamp coolers due to water usage.  So they are=3D20
>>>now using AC in very low humidity which isn't=3D20
>>>good
>>>for AC units.
>>>
>>>Jay
>>>
>>>Peltz Power
>>>
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>>
>>
>>--
>>~~~~~~~~~~~~~
>>Jeff Clearwater
>>Village Power Design
>>Sustainable Energy & Water Solutions for Home & Village
>>http://www.villagepower.com
>>gosolar at villagepower.com
>>NABCEP (tm) Certified Solar PV Installer
>>
>>530-470-9166
>>877-SOLARVillage
>>877-765-2784
>>72 Baker Rd.
>>Shutesbury, MA 01072
>>425 Nimrod St.
>>Nevada City, CA 95959
>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`~
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>
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-- 
~~~~~~~~~~~~~
Jeff Clearwater
Village Power Design
Sustainable Energy & Water Solutions for Home & Village
http://www.villagepower.com
gosolar at villagepower.com
NABCEP (tm) Certified Solar PV Installer

530-470-9166
877-SOLARVillage
877-765-2784
72 Baker Rd.
Shutesbury, MA 01072
425 Nimrod St.
Nevada City, CA 95959
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`~

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