To keep your beer fresh and your room cool, heat has to be removed and thrown away in the warm outside. It's like pumping water uphill. Here's where you can learn how it's done.

Refrigeration - Turning the physics into a fridge
My COLD laser gun
What is Cold? Why can't we have a "microwave" freezer....brrr....
electricity meter
Refrigeration takes energy. How much? What is the minimum possible energy?
It's Boiling!
How does it work? What does the refrigerant do?
What about a wet blanket?
Must we always supply electricity or energy? Can we cool without?

The Science of Making Heat Flow Uphill

Heat Transfer

About 15% of the world’s electricity is used to drive refrigerating and air conditioning systems!