How effective is a water to air heat pump setup for cooling?

Question

I plan to bury heat pump coils and use a small / medium motorcycle radiator and fan to cool a room in my house. This is simply a proof of concept and a fun project for me just wondering how big the radiator should be, pump flow and fan cfm.

Answer 1

I doubt this is going to be very efficient. Normally heat pumps use a refrigerant that undergoes a phase change to greatly increase efficiency/heat transfer. The design is a little beyond the scope of this forum. Generally, with the fan and pump, faster is better, BUT there is a point of diminishing returns that depends on numerous other factors.