Could a serpentine PEX collector at medium tilt protect itself from high temperatures via the thermosyphon flow?
Based on the first part of the day, I’d be inclined to say no. The collector with thermosyphon flow walked right up to boiling temp, and would likely have gone beyond this were it not for the boiling of the water limiting it to this temperature. So, at least for this collector, the normal thermosyphon flow does not appear to take heat out of the collector fast enough to keep the temperatures down below 200F — even on a cool day, and with not very hot water in the storage tank. If you think the above conclusions/explanations are not right or incomplete, or you have any other thoughts on this, please let me know …
