Heat Pump COP with solar-warmed inlet

Ctizian On Patrol works for me and I enjoy watching it Tony

Wasn't that in one of the Police Academy movies?

Yep I can hardly wait for new one to come out Tony

Your COP will increase greatly. Contact Water Furnace, a WF dealer, or check their website & get the design/engineer specs. They should have the heat production capacities for a wide range of EWT's. COP's should be clearly stated or easily calculated.

Make sure you isolate the solar panel system from the loop field w/a heat exchanger & circ pump, as the sun isn't constant & the panels may/will have a huge heat drain on the loops system on cold nights in the dead of winter. The increased antifreeze quantity required, without panel isolation, will also (negatively) effect the systems operation. You could look at a indirect water heating tank with loop field water circulated through a tube inside a tank of solar heated water. When the sun shines you crank up the solar panel pumps & heat the tank as high as you can. When the suns down the tank will drop, but shouldn't drain the loops if properly installed. You could even have a secondary pump on your loop to tank tube that "injected" warmer water from the tank exchange simple temp controls will run the pump until tank temps & loop return temps are near equal.

goodluck geothermaljones st.paul,mn.