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Author Topic: Corrosion in plate heat exchanger  (Read 10309 times)
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« Reply #30 on: February 21, 2018, 06:08:11 PM »

Bottom temperature would typically be room temperature and top temperature would be maybe 5-10C below panel flow temperature, it's a while since I've checked and I didn't take notes last time I did.
I've actually got no real issue with the thermosiphon element, it's the low delta across the heat exchanger that's disappointing, I could be seeing the return solar circuit at over 50C while the tank bottom is at 70C. It's not due to excessive solar circuit flow rate either, I'm only seeing 3-5l/s on the flow meter due to having the (admittedly short) solar circuit in 10mm copper.
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