Registered: 1417227587 Posts: 183
Reply with quote #1
I know we are a solar site, but we all like to save money and resources. I came across this video that shows how to add a misting system to your A/C compressor to pre-cool the air.
A/C pros have dissed the idea in the comments for various reasons (corrosion, freezing, etc) but in practicality, with a chlorine filter and using your A/C in only truly hot weather (well insulated house should only need it when it's very hot) this seems like a pretty cool (pun intended) idea. What do you all think? __________________ Denver, CO Double screen hot air collector
Registered: 1520709205 Posts: 61
Reply with quote #2
I've seen a couple of these videos on Youtube, so I played with it a little last year. Let the thing run for a while to get to a relatively steady state, checked the power usage. In my case around 4kw. Put a light misting into the coils and checked the power use again. My non-scientific experiment showed the power usage dropped to about 3.7kw. I didn't check, but I'm going to guess that just protecting the unit from direct sunlight would obtain almost the same savings. I'll do that this year if I ever need the AC.
Registered: 1352981942 Posts: 2,275
Reply with quote #3
My understanding is that the biggest issue with A/C misting is the mineral buildup on the coil or condenser if you have hard water. A mineral buildup would not only reduce efficiency, but could shorten the life of the unit.
Greg in MN
Registered: 1418158335 Posts: 8
Reply with quote #4
For a few more dollars upfront, I'd think the rooftop misting / drip systems would be more efficient as they reduce the heat infiltration at the point of entry.
Registered: 1352930725 Posts: 117
Reply with quote #5
The installation instructions for my Chinese mini split said to keep the exterior unit out of the rain, which I am still puzzling over.
__________________ Go Solar!
Registered: 1518026946 Posts: 3
Reply with quote #6
You would be better off to wet a Munters paper pad and blow air through it cooling the air to near the wet bulb.