I’m running a small CLS with nitrogen push and a CRC. I have a 50# solvent tank with an internal coil and a vacuum jacket. I plumbed the internal coil for chilled water, using a 500 gph submersible pond pump, filled a big cooler with ice and water, and let it run. Monitoring the return water temp it got down to 33.7F. That’s as cold as I’d ever expected with just plain water and ice. As I thought about it I wondered. With this is running while I’m recovering from my coil, which’s in dry ice and acetone, the returning solvent is going to be below freezing. Two things are going to happen. The water will freeze or the solvent will warm up. Neither is good. If the water freezes it could burst the coil, cross-contaminating the butane with chiller water. If it warms the solvent, the thermodynamics of heat moving to the colder will be stalled.
Am I overthinking this?
What’s the proper way to best use this tank? I bought it from a friend that wasn’t using it. He was clueless. Now I feel the same.