Quote:
Originally Posted by AC_Hacker
Well... it may never become an issue, but I think that the HDPE has a maximum temp rating of 180, after which it gets soft.
It could be a good idea to have a failsafe circuit that would sense for over-temp situations and could act to prevent damage. I have heard of flat plate solar panels easily reaching 212F.
-AC_Hacker
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Yes, that won't be an issue.
The heat exchanger is metal, and Solar will not flow into that unless Geo is flowing as well. The earth won't ever get to a temperature to cause that type of failure.