heating a shop [RE-wrenches]

[D Novotny]

Travis,

You might try contacting Don Stephens 509-838-8222 dsteph at tincan.org.  I
heard him speak of a similar concept at the Walla Walla RE fair this year.

Denise J. A. Novotny, MPA, MAIS
P.O. Box 15961, Seattle WA 98115
206-528-3749
dnovo at alumni.washington.edu

----- Original Message -----
From: "larry" <larry at h2nation.com>
To: <RE-wrenches at topica.com>
Sent: Wednesday, December 17, 2003 4:25 PM
Subject: heating a shop [RE-wrenches]


> Travis
>
> That does not sound very practical. I ran some numbers and the poor
specific
> heat of sand was only one of the many problems with this design. At best
you
> could heat a 2500 sq ft shop for about 11 days and that is at %100
assuming
> you could have a 50 degree delta T. Water is over three times better but I
> don't think you want to have a shop above a swimming pool do you? And all
> that expense just to get a free month of heating?
>
> I visited a friends place a few weeks ago where his 3500 sq ft shop was
> about 70 inside with about 34 out.
> He spends allot of time on the floor. Literally. He has a bad back and he
> will lay down on the warm floor for comfort.
> Simple system. 1/2 inch PEX spaced every 8" and 105 degree supply with
about
> 85 degree return. Uses oil for backup and some old flat plates he
salvaged.
>
> If you want storage go for water and forget the sand.
> One interesting thing is we did a house with the Warmboard floor heating
> system and some Thermomax evacuated tubes not far from the shop. That
system
> will easily supply useable heat when the flat plates cannot even turn on
the
> differential controller. I have even seen over 100 degrees when the sun
was
> barely visible as a bright spot behind the clouds.
> 440 sq ft of collector? You better find someplace to store heat or supply
a
> dump system.
>
> Want to see my figures and what problems you'll have contact me off list.
>
> Larry Elliott
>
>
> Hello All,
>
> Can anyone refer me a source of information for the solar space heating
> system where you bury the tubing several feet (?) under the slab (in
> sand?)? It seems like I remember... the idea being that sometime late
> in the summer you start diverting heat to this loop and pump all that
> unused heat there. By the time it's getting cold and you need the heat
> it's rising up to the slab. At the proper time you switch over and
> start heating the slab directly with the solar collectors.
>
> We are preparing to build a new shop, we've already got thousands of
> feet PEX tubing and manifolds, and I just bought 11 used 4x10's from
> Smitty at AAA Solar.
>
> Thanks in advance.
>
> Travis Creswell
> Ozark Energy Services, Inc.
>
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