DIY Chiller or am I crazy?

[Nemo]

First you would need to run a large section of coils probable more like 40-50 feet of 1/2" tube. This would alow you to have a fair amount of water in the fridge being cooled.
Second I would run a dual solinoid valve one on the outlet from the fridge and the other from your return line (this would elliminate the need of a pump and maintain no pruser in the line so no risk of blowing a line) off of a temp controler to turn on when cooling is needed.
Third I would probable run a timer on the solinoid so that you would only have it open for about 1-2 minutes, any more time than that and the fridge would not be able to keep up. If you run a large coil in the fridge there should be plenty of cooling water in the coils to do the job.

This should solve the problem of having the fridge cycling all the time and give you a cheap chiller.


JMO


Robert