Refrigeration Cycle

 
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Refrigeration System

 
 
Refrigeration Basics 101    By: Eric Nelson
 

Refrigeration Basics

  • Refrigeration is the removal of heat from a material or space, so that it’s temperature is lower than that of it’s surroundings.
  • When refrigerant absorbs the unwanted heat, this raises the refrigerant’s temperature (“Saturation Temperature”) so that it changes from a liquid to a gas — it evaporates. The system then uses condensation to release the heat and change the refrigerant back into a liquid. This is called “Latent Heat”.
  • This cycle is based on the physical principle, that a liquid extracts heat from the surrounding area as it expands (boils) into a gas.
  • To accomplish this, the refrigerant is pumped through a closed looped pipe system.
  • The closed looped pipe system stops the refrigerant from becoming contaminated and controls its stream. The refrigerant will be both a vapor and a liquid in the loop.
 

Refrigeration Cycle


There are four main components in a Refrigeration System:
  • The Compressor
  • The Condensing Coil
  • The Metering Device
  • The Evaporator
Two different pressures exist in the Refrigeration Cycle. The evaporator or low pressure, in the "low side" and the condenser, or high pressure, in the "high side". These pressure areas are divided by the other two components. On one end, is the metering device which controls the refrigerant flow, and on the other end, is the compressor.
 

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