Further to that, have a look at the refrigeration units on chest type portable fridges. They’re really not very big, compressor smaller than a roast chicken, small low speed fan similar to an auxiliary cooling fan in a PC, a controller board, and a few meters of metal tubing.

They typically consume around the 50 to 80 watts while the compressor and fan are running, and generate two to four times that in cooling capacity.

Surely people have adapted these in to PC cooling units?