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Old 05-20-2013, 02:32 PM   #1
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options for cooling the condenser

This is my first post on this forum so i hope i following the rules.

I am planning on building a custom enclosure, perhaps 3 feet wide by 5 tall to resemble a 1960 era main frame, I plan on using an arduino controller to do the "tos star trek" light array and control the spinning reel to reel.

I have a questions in regard to modifying a ac unit for a water chiller :

1. I have easy access to a 55 gallon barrel outside with a solar powered fan on top, i was thinking i could immerse the condenser in a small cooler like the evaporator and use a pump to exchange water with the large outside reservoir. is there any issue with doing this? advantage or disadvantage.

Last edited by jbragg77; 05-20-2013 at 05:02 PM.
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Old 05-22-2013, 02:26 AM   #2
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Hello jbragg77,

A liquid cooled condenser can provide higher capacity, steady and adjustable head pressure and obviously it's easy to transfer the heat out of the room via 1/2" tubing.

Issues you may encounter:

1. Galvanic corrosion. You must run multi metal coolant.

2. Heat rejection of barrel. It must be able to keep up with the total heat of rejection from the chiller. If barrel temp exceeds ambient then you'll need to add a radiator.

3. Expense and complexity. In addition to the reservoir, tubing, coolant and extra pump, you'll need a way to keep the barrel at a fairly steady temperature in all climates. A thermostat can cycle the fan to keep temps in range in the warmer months. If it get's really cold where you are then you may have to insulate the barrel or just bypass it through a small radiator during the colder months.

4. Pump failure can be disastrous. Make sure to incorporate a thermal shutdown for the chiller and pc.

Sounds like a cool project.

Welcome to EOCF!
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