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Incredible Test Results!

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Posted by Brian Graham on April 20, 2006, 3:21 pm
 
I've been working on a SDHW system for a while now. I have my winter solution in
place, with a box on my wood stove doing the water heating for the winter,
keeping all the water potable.

I've also been planning on putting a coil in my furnace duct to get some of that
heat from the stove distributed through the house better.

Now comes the good part. Confirmation of just how effective this will be.

A friend of mine has a pair of flat plate collectors, aimed for winter. Output
temperature yesterday was 167F. Nice! Mine will be aimed for summer sun. Even
better! :-)

Anyway, he ran a test yesterday. A pair of air conditioner coils in parallel in
his air ducts. Input temperature: 167F. Output temp, 102F. Air temperature in
the duct: 122F!!

A 60 Gallon tank running through the ducts at 2 gal/min would allow for 30 mins
of heating the house. Without allowing for any recovery from your source. That
will certainly cover for 100% of my needs for about 1/2 of the winter. And  1/3
- 1/2 my needs for the rest.

FYI, I burned about $50 of wood (10 cord) last year, and about $00 in oil.  I
expect next year's oil bill may be $00 or less.

Sweet!!!

Posted by Brian Graham on April 20, 2006, 5:06 pm
 
Guess I forgot to mention that I'm installing 2 flat-panel collectors for summer
operation..  Oops.  Excited to talk about the test results, I guess. :-)


I've been working on a SDHW system for a while now. I have my winter solution in
place, with a box on my wood stove doing the water heating for the winter,
keeping all the water potable.

I've also been planning on putting a coil in my furnace duct to get some of that
heat from the stove distributed through the house better.

Now comes the good part. Confirmation of just how effective this will be.

A friend of mine has a pair of flat plate collectors, aimed for winter. Output
temperature yesterday was 167F. Nice! Mine will be aimed for summer sun. Even
better! :-)

Anyway, he ran a test yesterday. A pair of air conditioner coils in parallel in
his air ducts. Input temperature: 167F. Output temp, 102F. Air temperature in
the duct: 122F!!

A 60 Gallon tank running through the ducts at 2 gal/min would allow for 30 mins
of heating the house. Without allowing for any recovery from your source. That
will certainly cover for 100% of my needs for about 1/2 of the winter. And  1/3
- 1/2 my needs for the rest.

FYI, I burned about $50 of wood (10 cord) last year, and about $00 in oil.  I
expect next year's oil bill may be $00 or less.

Sweet!!!



Posted by SJC on April 21, 2006, 12:53 am
 Way to go. I am a real fan of solar thermal home heating. Looks like you =
have a good start.


guess. :-)

for the winter, keeping all the water potable.

for summer sun. Even better! :-)

Air temperature in the duct: 122F!!

your source. That will certainly cover for 100% of my needs for about =
1/2 of the winter. And  1/3 - 1/2 my needs for the rest.



Posted by redicliff on April 29, 2006, 3:00 am
 I'm interested in your "box on my wood stove".
Can you provide details?

Thank you


Posted by Brian Graham on May 3, 2006, 3:48 pm
 My wood stove has 2 levels on it. The bottom level is 36" x 6". So, I had a
steel box made up with those dimensions. I started off with 1/8" steel but found
it bowed under the pressure. 36x6x70,120 lbs pressure on the top & bottom
plates. It DID bow the steel. So I added another 1/8 plate top & bottom. It's
flat now. :-)

I have installed a sacrificial anode in the tank, and will be installing a
pressure relief valve in it this summer. I have valves in each of my tanks
downstairs, but there are shutoffs in between.

The system works very well. From a cold start at 7pm, I can have the tank on the
stove HOT by 11.

In fact, my setup works so well, I'll be adding 2 more 10x10 boxes on the top
level of my stove (on either side of the stovepipe). This will effectively
double my collection surface area and give me surplus heat to dump in my air
ducts. A friend's test results started this thread. Very very effective.

FYI, without the wood stove, my oil bill would have been about $000 a year.
With the stove, my oil has dropped to $00 along with $50 in wood last year.
Now I plan to dump extra heat in the air ducts. I expect to cut the oil bill to
$50 or so.

And if I still want to pump production, I can switch my solar panels from water
to propelyne glycol and collect some more heat in the winter. That may yet come..
--
Brian

I'm interested in your "box on my wood stove".
Can you provide details?

Thank you




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