Replace the compressor with a bigger one, replace the condensor with a bigger one, chop a couple feet out of the middle, charge it with propane & fill the tank with brine!
Step 1: Out With the Old
Step 2: Cutting It Down
(oops, no pic)
Step 3: Discard the Old Condensor
Step 4: The New Condesor
From an old window AC unit.
It's much shorter & also has a much larger capacity.
Step 5: Compressor
We added that coil of copper tubing above it to prevent the compressor drawing liquid from the evaporator.
We used the original cap tube, as the chart called for 43" of #1 & we had 60" of #5. I calculated them out to about the same volume. So it should work?
Step 6: Coil & Compressor
Step 7: Fans
Step 8: From the Front
Removed & plugged the valves from the front.
This unit had a hot water supply, too. We removed it.
I'm geusstimating about 22% salt in the brine solution
Step 9: BRRRRRR!
It cools a can of room temp beverage to low 30's in about 2 minutes.
Step 10: Skylar Gives It Bling!
Step 11: Working on a Lid...
And a grill out of expanded steel.
After much thermostat adjusting, the brine runs between 12F & 18F.
The compressor runs VERY cool & quiet.
Propane is a darn good low temp refrigerant.
(oops, lost the pic)