Refrigeration basics
Refrigeration
The mechanism used for lowering or producing low temperature in a body or a space, whose temperature is already below the temperature of its surrounding, is called the refrigeration system.
The transfer of heat from a low-temperature region to a high-temperature one requires special devices called refrigerators.
Refrigerators are cyclic device, and the working fluids used in the refrigeration cycles are called refrigerants. Here the heat is being generally pumped from low level to the higher one & is rejected at high temp.
Another device that transfers heat from a low-temperature medium to a high-temperature one is the heat pump. Refrigerators and heat pumps are essentially the same devices; they differ in their objectives only.
