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Solar Barn Version 2 - Page 4

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Posted by Morris Dovey on May 23, 2004, 12:11 am
Gary wrote:

Hmm. A 50F gain on a bringht, sunny winter day doesn't sound
like very good performance, especially if there's snow on the ground.

At 9:00 a.m. on a November morning I shot the picture at the
bottom of http://www.iedu.com/DeSoto/pix.html . Heat gain at that
moment varied between 102.2F and 104.6F (depending on the paint
used on the radiation trap/heat exchanger section being
measured). By midwinter I was seeing a gain in the area of 135+F
for the unit bolted to the outside of the wall.

On the other hand, the unit did cost more than US$/ft. Perhaps
there's more to be considered than just $/ft...

Morris Dovey
DeSoto, Iowa USA

Posted by WMFisher40 on May 22, 2004, 12:24 pm

yields "link not found on server" error msg.

 - Bill F.

Posted by Gary on May 22, 2004, 11:39 pm
 WMFisher40 wrote:

Hi Bill,

It works OK on both of my computers.

If it still does not work for you, I can email you the two PDF's -- let
me know.

Thanks -- Gary

Posted by Gary on May 24, 2004, 3:33 pm
I added performance plots for the months of Dec and Feb (Billings, MT)
at http://users.montanadsl.net/~reysa/   "Simpler Yet.." link.  They show
daily hi and lo for ambient and garage, and the daily collector gain and

Here is the one paragraph summary ---

For December the Month Averages are:
             Garage    Ambient   Difference
Avg Low :    27.5    16.3       11
Avg High:    47.1    32.8       14

Avg Daily Collector Gain:    60559
Avg Daily Collector Loss:   -29305

For February Month Averages:
             Garage    Ambient   Difference
Avg Low :    30.0    19.2       11
Avg High:    52.6    34.5       18

Avg Daily Collector Gain:    67436
Avg Daily Collector Loss:   -30191

As expected, the day to day results vary a lot depending on the amount
of sunshine on sunny days the inside temperature is up around 30F
(making for a nice 60 to 70F), and on cloudy days the inside and outside
temperatures approach each other.


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