[RE-wrenches] Heat dump or Stagnate?

[Dana]

I have only seen boiled glycol turn to a cola like syrup that had to be
purged and removed. 

What kind of system & glycol is this?
Where would you expand that much?

Can you provide a link to this paper?

We use heat dumps.




Dana Orzel

Great Solar Works, Inc
www.solarwork.com
E - dana at solarwork.com
V - 970.626.5253
F - 970.626.4140
C - 970.209.4076
"I'd put my money on solar energy. I hope we don't have to wait 'til oil and
coal run out before we tackle that."
-Thomas Edison, in conversation with Henry Ford and Harvey Firestone, March
1931

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Troy Harvey
Sent: Thursday, April 23, 2009 10:43 AM
To: RE-wrenches
Subject: [RE-wrenches] Solar Combi-systems: Heat dump or Stagnate?

I'm wondering how many of you out there have installed medium sized  
solar hot water systems (6-8 panel) that were designed to stagnate  
during summertime over production as opposed to diverting to a heat  
dump or radiator? The International solar agency has a couple of  
papers that show a properly designed system should be able to stagnate  
in a way that the boiling glycol mix vapors in the panels, purge the  
panels of fluid, turning off the system without degrading the glycol.

That doesn't seem to be a typical way to design systems in the U.S. ,  
we've usually gone to a heat dump. Does anyone have experience with  
this?


Troy Harvey
---------------------
Heliocentric
801-453-9434
taharvey at heliocentric.org


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