ground source and hydronic cooling recommendation [RE-wrenches]

[Travis Creswell, Ozark Solar]

Why not just zone (cool) with window units?  They are available with EER's
of 12 or better.  Use all the money and time you'd save to buy more watts of
PV.  I easily cool my 600 ft2 office with an 8000 BTU unit that uses less
than 700 watts.  It's very quiet and came with a remote control for less
than $300.  EER = BTU's/Watt Hour.... so 8000 BTU's/~670 watts/hr = an EER
of 12.

You could also do zone cooling with a two-stage heat pump and zones
controlled via dampers. They come several sizes down to one ton with 2 tons
for the 2nd stage.  You can find them in SEER's up to 15 and higher.

By no means am I trying to tell you what to do or questioning your process,
I'm just curious to know what kind of efficiency gains you expect?

Good Luck,

Travis Creswell
Ozark Energy Services, Inc.



-----Original Message-----
From: Kurt Albershardt [mailto:info at es-ee.com] 
Sent: Sunday, February 08, 2004 1:50 PM
To: RE-wrenches at topica.com
Subject: RE: ground source and hydronic cooling recommendation [RE-wrenches]

--On Sunday, February 08, 2004 1:40 PM -0600 sunwise <sunwise at cheqnet.net>
wrote:
>
>> I should mention that my plan is to pull fresh air through a 100'
>> culvert (3-4' diameter?) buried ~5' underground as a first stage, which
>> will then feed evaporative cooling for the Summer and provide fresh air
>> for the other months.
>
> This sounds like the "earth tubes" of the past.  One problem with
> drawing air through buried pipes for winter time warming or summer
> cooling is condensation in the pipe.  This is bad regarding molds and
> related air quality issues.  Back in the 60's and 70's, those trying to
> utilize earth tubes used perforated drain tile so the condensate
> wouldn't accumulate.  Where radon is present, you are essentially
> setting up giant radon collection system for the home.


OK, nix that one ;>

Hydronic loop buried at similar depth for precooling a glycol solution which
feeds a radiant chilled ceiling?

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