I built a device out of a large copper block interfacing with a matrix of water cooled TEC on one side to cool the block and a TEC tower on the other, with the top of the TEC tower opening into an insulated chamber. The chamber has a valve to a CO2 canister. It’s able to make dry ice without any adiabatic cooling. I 3D printed the entire insulated enclosure using Build123D (a parametric python CAD library). I’ve always been fascinating the using non mechanical systems for all sorts of tasks, in this case transferring large amounts of heat. It’s a pretty inefficient way to do things; and I did cheat by having a mechanical pump moving the water cooling into a heat exchanger with fans. The amounts of dry ice are also very small. My favorite bit was the large pure copper block acting as a large efficient thermal mass in the middle of the system.