Quote:
Originally Posted by jeff5may
Rig your shallow well pump and misting system up to a solar panel and see how it goes. Cool water takes lots of BTU power and efficiency from the ground and deposits that power indoors. It's amazing how just a few degrees cooler of condenser temperature really boosts the comfort indoors.
The process relies on this formula:
gpm = btu/hr / (Delta-T x 500)
For example, at 1 GPM and a 20 degF Delta T, you can cover up to 10k of the heat load with the cool water. How much more air is blowing through the outdoor unit? Thousands of times more.
Even better, these factors add up:
Air heat + water heat = total heat
I'm sure you could get the most out of the existing mini split this way. With the sun providing pump energy and the water washing away the heat, the upgrade would be essentially free to operate after the initial investment. Definitely worth a try.
If the water cooling rig works well on the existing rig, you might want to consider a pump and dump heat pump system instead of the recirculating ground loop setup. If you have the well capacity, it's a lot easier to build and take care of than a massive ground loop. Plus, the supply water temperature remains the same year round. A loop will float around in temperature every cycle as well as with mode of operation.
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My only concern with doing the spraying to much is damaging the fins or getting them gunked up. We have iron in almost all of the water sources i have found . But ive been doing it on and off for about 3 years so far nad it has only made mud . Guess i need to plum a drain off if i done it constant . Fix a snap disk controller to mist at certain temps.