Quote:
Originally Posted by Mikesolar
On the HP, I would keep a thermostatic valve on the input from any solar assist to the heat pump set at about 20C (72F) to keep the head pressure stable, just in case.
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It would be much more efficient to use a VFD to throttle back the compressor. Or just design the system to be able to operate right to the point where the heat pump can be bypassed. Oversize the condenser and you won't have any excessive pressure problems since water has a lot of thermal mass.
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To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...
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