Mechanical refrigeration is accomplished by continuously circulating, evaporating, and condensing a fixed supply of refrigerant in a closed system. Evaporation occurs at a low temperature and low ...

The modern air conditioning system cools an indoor space by using the refrigeration cycle. This refrigeration cycle works by controlling the level of energy in the system’s refrigerant: Some parts of ...

The next time you open your fridge, take a second to behold the miracles inside of it: Raspberries from California, butter ...