A "phase change" is a change of the state of matter, like water to steam, or ice...
The gaseous Freon (They are also testing with LN2, what would be more better than Freon. But they need the right pressure to become LN2 liquid) comes from the eva, into the compressor. The compressor increase the pressure to the condensation pressure of Freon or whatever, and the Freon changes state to liquid.
The condenser, gets rid of the heat generated by the evaporator during compression.
Through the capillary tube, the fully liquid Freon reaches the eva. The liquid Freon expands inside the eva and changes state from liquid to gas. The vaporization-process "consumes" the energy from the processor. - he is cooled down.
chilly1 also said about the project with LN2:
Actually we are working on a real out there system using a very large supply of Ln2 for a consistant supply and refillable containers with cryo pumps and enviromental chambers for 24/7 use at -178C and lower temperatures but the cost to operate would be huge.. I mean 100 to 200 US per 24 hours...
very interessting..
