Hot water system coupled with water source heat pump loop?
Hot water system coupled with water source heat pump loop?
(OP)
Water Source heat pump system – I have used a boiler for direct heat add (boiler used only for heat add). I have used a boiler for an indirect heat add (heat exchanger). I don’t think I had a system the hot water system was directly coupled to the heat pump loop (hot water used for entry unit heaters and heating ventilation air). I can’t think of any reason I can’t have the loops directly coupled as long as I have a heat trap. Am I not thinking of something?
(I am talking about a regular water source heat pump loop - not a ground source).
(I am talking about a regular water source heat pump loop - not a ground source).





RE: Hot water system coupled with water source heat pump loop?
and it seems you use the boiler to directly heat hydronically, and also to heat the loop? So you need two temperatures, one lower one for the heatpump loop (since you also need to cool it can't be too warm), and a high temp loop for heating directly.
not sure what you actual question is?
RE: Hot water system coupled with water source heat pump loop?
The tricky thing is expansion and where to put the expansion tank.
RE: Hot water system coupled with water source heat pump loop?
I'm not sure what your question is, are you designing a new system, or retrofitting an existing one?
And why run a boiler at 180°F? Especially if you use a heatpump. So you operate the boiler very inefficiently at 180°F, then you blend the water to lower temps (~60°F or so) for the heatpump, and put electricity in to get 120°F air temperature.