The refrigeration process uses the transfer of heat in the refrigeration system and is performed by a refrigerant operating in a closed system. There are 4 components to this taking place and should always be the first thing you look for when arriving on a new job.
The Components
Compressor – This is the mechanical device that pumps refrigerant vapor from a low pressure to a high pressure area. The main types of compressors are rotary, screw, scroll, reciprocating and centrifugal.
Condenser – This piece of equipment is responsible for removing heat from the refrigeration system. It transfers the heat through condenser tubes typically to air or water. Condensers can have forced air or natural draft.
Metering Device – The metering device controls the flow of refrigerant to the evaporator by separating the low and high pressure parts of the system. 2 actions occur in this device; the refrigerant is cooled to the evaporator’s temperature by actual evaporation taking place; and the pressure is lowered to a pressure that corresponds with the evaporator temperature.
Evaporator – Absorbs heat into the refrigeration system. The refrigerant absorbs the heat from its surroundings and boils it into a low pressure vapor. This process is similar to boiling water on the stove.
Since these are the main components, this is the first step in repairing or providing maintenance on a system. Check each component carefully to determine where your starting point is.
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