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Buried sawdust heats homes hot water.

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Posted by paulifatguts on June 27, 2007, 3:23 pm
 
A carpenter friend who lives three hours NORTH of Toronto Ontario had
a problem getting rid of sawdust from his garage workshop.He dug a
large hole,10'by10'by 6' deep and then he lined it with some black
construction plastic.He put about two or three feet of sawdust on
this,and then he layed coiled flexible copper on it with the ends of
the tubing ending above ground.Next came another couple of feet of
sawdust.He wet the whole business down with his garden hose and
covered it with more black plastic and then enough dirt to even out
his yard again.He knew only that the sawdust was definitely gone and
that he might get some hot water for awhile.Turned out that he heated
his water,for three teenagers,wife,self,dogs,many summer and winter
visitors for the nextsix years that I knew him.Could have lasted
longer,I don`t know.He would bring it up because his sawdust problem
was still a problem.I paid attention because I didn`t think it would
be worth all the digging and it made me nuts struggling to heat water
in my cottage all that time when I could have done the same as him and
got all the sawdust I needed delivered free from him.


Posted by AstickfortheMULE on June 27, 2007, 8:02 pm
 
Are you sure this is not a

"friend of a friend".

This smells of an Urban legend variety similar to they make lightbulbs
that never burn out.

If something is too good to be true, then it probably is.

Of course, if it is true, give me his name.  I have made a huge pile
of sawdust over the last year.  Heck,  might even grind up a cord of
wood.

Seattle, WA



Posted by Paul Ciszek on July 3, 2007, 2:34 am
 

We need a term for Urban Legends overtaken by time.  Such as:

"They" are supressing light bulbs that last for a very long time and use
a lot less electricity.  (They're called compact fluorescents, and they
keep getting cheaper.)

"The calls are coming from inside the house!"  (From a cell phone, maybe?)

If you get an e-mail with the title "GOOD TIMES", don't open it or you
will get a virus.  (At the time this one originated, that was impossible;
isn't progress wonderful?)

--
Please reply to:            | "One of the hardest parts of my job is to
pciszek at panix dot com    |  connect Iraq to the War on Terror."
Autoreply is disabled       |            -- G. W. Bush, 9/7/2006

Posted by Morris Dovey on June 28, 2007, 8:37 pm
 David Williams wrote:
| -> One pound of wood has a theoretical maximum of ~ 8600 BTU's, so
| ~ 56,000
| -> BTUs. That's plenty of hot water.
|
| Hmmm... (Dredging brain for ancient records of archaic units...)
|
| 56,000 BTU would produce about 700 pounds of hot water, assuming it
| has
| to be heated by 80 deg F. That's about 300 litres. (Sigh of
| relief.) I once measured the flow-rate of a "low flow" shower head,
| and found it sprayed 150 mL per second of water. About 100 mL of
| that would cone
| from the hot water side, so a shower uses a litre of hot water every
| ten seconds. So 300 litres would keep the shower running for 3,000
| seconds, or 50 minutes. If a family of four all take a ten-minute
| shower, almost all the water would be gone, and they'd still have
| dirty dishes, a dirty dog, etc..
|
| It's not impossible, but they'd have to be fairly frugal.

<struggling with new-fangled metric units>

My calculator says that if a family of four all take a ten-minute
shower, that'd be only 60L - unless, of course, they shower
separately.

If they get the dog into the shower with them, the shower might take
longer.

:-)

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/



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