Semi-conductor electric refridgeratot

As part of a removal job I am doing for a local business, I got about a half dozen mini regridgerators. Two of these were not the regular compressor style regridgerators. They were semi-conductor fridges. Still trying to fully understand how they work. Not sure what type I like scrapping better. These were nice because you don't have to recover refrigerant, but there is no copper in them. They do have a low grade board, some decent size heat sinks and some computer fans located near the heat sinks.

Ive come across a wine cooler looking refigerator thing 2 years back. Same, no compressor but small fans. It was strange indeed