[RE-wrenches] Solar Combi-systems: Heat dump or Stagnate?

Carl Adams swingjunkie at gmail.com
Sat May 2 06:39:42 PDT 2009


Wrenches,

As with Tump I have a Schuco system installed on my residence.
Attached are a few papers on the Schuco antifreeze solution required
in the Schuco systems and the steamback process.   I watched this
happen in our lab system this week.  I don't think that the system
shutoff till the next day is actually a serious drawback.  Typically
if the tank meets it's upper limit setpoint and the pump shuts down
then the system will stagnate, steamback and the collectors filled
with water vapor (not glycol) will cook.  But my tank will still be
hot the next morning, the tyfocor and water will recombine, and life
goes on.


On Thu, Apr 23, 2009 at 11:58 PM, Troy Harvey <taharvey at heliocentric.org> wrote:
> That's exactly the process. Not surprising since they are a german company.
> Anybody have the Schuco install reference materials?
>
> Troy Harvey
> ---------------------
> Heliocentric
> 801-453-9434
> taharvey at heliocentric.org
>
>
> On Apr 23, 2009, at 1:53 PM, Tump wrote:
>
>> Review Schuco panels they use a anti freeze that separates out during hi
>> temp stagnation we refer to it as "steam back", glycol separates from the
>> water, water turns to steam creates pressure that moves the glycol out of
>> the collectors. They say because of this design their anti freeze also has
>> a
>> cycle life of 10 years. The only draw back is if you have the pump shut
>> off
>> due to hi temp the controller will not restart until the next day.
>> Use it in my home & I like the product.
>
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