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radiant heat design with solar thermal collectors - Page 7

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Posted by Solar Flare on October 6, 2006, 12:03 am
 
My Grundfos circulator pump takes between 150-155 watts to run if
there is no head, full head, flow stalled or anything in between.
Trouble is the bigger pump is needed,whether for draindown restart or
closed loop system to purge the air. The power or the va does not
change.



Posted by carneyke on October 4, 2006, 11:38 am
 
In the spring, get a heat exchanger tank and heat your domestic water.



Posted by Eric Yancey on October 4, 2006, 1:40 pm
 That is something that I am considering in the distant future.  However, my
shop is a standalone structure about 30-40 feet from the house, so I would
likely need to bury some pipe to transfer the heat to the house.  I'm not
quite ready for that!

thanks




Posted by SJC on October 4, 2006, 4:21 pm
 You can find some system diagrams here:

http://thermomax.com/Active_Closed_Loop.php

and system components and more diagrams here:

http://kingsolar.com/index.html



Posted by Gary on October 4, 2006, 7:55 pm
 Hi Eric,
I really like the simplicity of your first scheme.
Seems to me it would be worth a try, but also wise to include plumbing and space
provisions for the hot water tank.
Also like SJC's idea of adding a differential controller (about $30).

It would be really interesting to track some temperatures over time:

    Ambient
    Slab
    Collector out
    Room

An Onset Computer U12 4 channel would get all of this for about $00.  It would
make a nice article or BuildItSolar project -- I think that others here might
have some less expensive logging schemes?

You might take a look at this Mears house -- it has some similar features:
http://www.builditsolar.com/Experimental/MearsSolarHeatedHome.pdf
and
http://www.livescience.com/environment/060421_green_house.html

Gary


Eric Yancey wrote:

www.BuildItSolar.com
gary@BuildItSolar.com
"Build It Yourself" Solar Projects









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