The guy that gave it to me said they use it like a pre-chiller. It is fully submersible so they put it in a bucket of ice water and then run refrigerant through it. He said that they are very efficient.
That is what I will probably do. Before I do, I want to make sure there wouldn't be a good use for it. I would hate to sell it and then later wish I still had it.
My friend is in the HVAC industry. I was telling him that I was planning to make a CFC and he said, "Before you do that, I have something that may work for you." He gave me one of these: http://www.amazon.com/CPS-Products-MT69-Molecular-Transformator/dp/B00B4WCQRS
Never used so it is...