Refrigeration
A refrigeration system transfers heat from a substance to be cooled to another or vice versa, i.e., to heat or cool a fluid, normally air or water. It is worth highlighting at this point that depending upon level, heat can be perceived as cold or warm. Most refrigeration systems utilise what is called the vapour compression cycle. This is when heat is absorbed through a heat exchanger as the refrigerant evaporates. Heat is then rejected through another heat exchanger as the refrigerant condenses. There are other types of systems which can also obtain a cooling effect for example absorption cooling and steam injector.
