Water Source heat pump

mlac · 06-29-09, 02:02 PM

I have been pondering the idea if a air source heat pump could be converted to a water source heat pump easily by removing the existing coils off the outside unit. build another set of coils using 3/8" copper tubing inside 1/2 or 5/8 copper tubing and bend this tubing to fit as much as possible in place of the old coil. tie the 3/8 tubing back into the freon side of the unit and tie the 1/2 or 5/8 tubing into a water source to cool and heat the freon instead of air. The water would be coming from a 35 gallon a minute free flowing well which would not require a pump and is 67 degrees year around (totally free water source) My thinking is if this is possible the 67 degree water would be a lot more efficient than 100 degree air in the summer and 30's air in the winter as the source to cool and heat freon. In my experience with heat pumps they work well in moderate temp ranges 40-85. below 40 the heat strips does most of the work and above 85 the unit runs to long. Years ago I seen a small window ac unit set up this way and it cooled a 1000' square foot camp. The out put temp was right at freezing.

Any Suggestions, Ideas from you guys?

06-29-09, 02:02 PM	#1
mlac Lurking Renovator Join Date: Jun 2009 Location: South Mississippi Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts	Water Source heat pump I have been pondering the idea if a air source heat pump could be converted to a water source heat pump easily by removing the existing coils off the outside unit. build another set of coils using 3/8" copper tubing inside 1/2 or 5/8 copper tubing and bend this tubing to fit as much as possible in place of the old coil. tie the 3/8 tubing back into the freon side of the unit and tie the 1/2 or 5/8 tubing into a water source to cool and heat the freon instead of air. The water would be coming from a 35 gallon a minute free flowing well which would not require a pump and is 67 degrees year around (totally free water source) My thinking is if this is possible the 67 degree water would be a lot more efficient than 100 degree air in the summer and 30's air in the winter as the source to cool and heat freon. In my experience with heat pumps they work well in moderate temp ranges 40-85. below 40 the heat strips does most of the work and above 85 the unit runs to long. Years ago I seen a small window ac unit set up this way and it cooled a 1000' square foot camp. The out put temp was right at freezing. Any Suggestions, Ideas from you guys? Last edited by mlac; 07-01-09 at 08:01 AM..