I am starting a project which I have wanted to do for years. The idea is to take a window AC unit, and dunk the condenser (cold radiator) in a cooler of water, then run the loop through the water. I have been keeping my eye on used window AC units for a while and this weekend one popped up in my neighborhood for $35.
10k BTU window AC with 1HP compressor
Time to rip and tear!! I had to disassemble most of it to free up the condenser.
There is only one tricky part to this whole project. The thermal sensor will stop the compressor from running 24/7, this is obviously bad since it needs to run constantly. Here is what I did to trick it:
-Find the thermal sensor, mine was right in front of the condenser
-My thermal sensor was a little devices called a thermistor, which changes resistance with temperature.
-I cut the thermistor, read the resistance at ambient and then warmed it up to 110f and read resistance again. The 55f ambient resistance was 11k ish and 110F resistance was 6.8k ohm.
-In place of the cut thermistor, I soldered on equivalent 6.8k of resistors to force the AC unit into thinking it is 110f degrees
Here is what it looks like after just 5 minutes running 24/7
That's all for now...next up I need to drop it in a bucket of water and run the loop through it. I am obviously going to need some anti-freeze of some sort and likely a submersible pump since the large reviver will be located under the bench rig.