How does a refrigerator work

Refrigerators have been designed to work using different
processes. However, most of the modern domestic refrigerators work using a vapour
compression cycle. In this type of refrigerator some special gas called a refrigerant is
compressed using a compressor. This increases the temperature of the refrigerant. The
refrigerant is then cooled to a temperature closer to the room temperature by
circulating it in a radiator coil. This compressed refrigerant at near room temperature
is then allowed to expand. This brings down its temperature considerably below 0 degrees
C. This very cold refrigerant is then circulated through cooling coils inside the
enclosed compartment of the refrigerator. The refrigerant after circulation through the
cooling coils, is again taken to the compressor for repeating the process of
compression, cooling and expansion in a continuous cycle.