Max water temp for glycol solar panel?

Daox · 02-13-12, 08:20 AM

I've read in a few places that too high of temperatures really cause glycol antifreeze to break down. However, I can't remember any specific temperature that they say to stay below. Does anyone know off hand?

Daox · 03-06-12, 02:43 PM

I just found the answer to my own question in an issue of HomePower magazine.

Quote:

The buffer breakdown temperature of generic propylene occurs at about 285°F. A few years ago, The Dow Chemical Co. introduced DowFrost HD, which has a maximum temperature of 325°F.

So, it seems you can get an antifreeze system REALLY hot before the glycol is a problem. I think other plastics in the system will become a problem before the antifreeze starts to break down.

02-13-12, 08:20 AM	#1
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	Max water temp for glycol solar panel? I've read in a few places that too high of temperatures really cause glycol antifreeze to break down. However, I can't remember any specific temperature that they say to stay below. Does anyone know off hand? __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode