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Here we go again for the umpteenth time here....
The cooling will come from what? The freezers cooling loop?
If so FORGET IT! Cooling of any sort involves moving heat from point-A to point-B. To do so requires the cooling loop to be able to move more BTU's to point-B than the heat source (point-A) produces. The cooling loop in a refrigerator/freezer is not designed to move large amounts of heat - they remove relatively SMALL amounts of heat from the contents over a long time which are in a very well insulated casing. It is only because the food is not continuing to generate more heat that the temp goes down over time.
Quick test for you: put a couple hundred watt heater in your freezer and watch just how fast the temp rises...
Just search for immersion cooling to pull up the numerous existing threads on this.