Refrigeration(1)

Definition of Refrigeration

Refrigeration is the removal of heat from a material or space, so that it’s temperature is lower than that of it’s surroundings. The refrigeration process is a method for lowering the temperature of an object.

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”.

LAWS OF REFRIGERATION

 

  1. FLUIDS ABSORB HEAT WHILE CHANGING FROM A LIQUID STATE TO A VAPOUR STATE.
  2. THE TEMPERATURE AT WHICH A CHANGE OF STATE OCCUR IS CONSTANT DURING THE CHANGE PROVIDED THE PRESSURE REMAIN CONSTANT
  3. HEAT FLOWS ONLY FROM A BODY WHICH IS AT A HIGHER TEMPERATURE TO A BODY WHICH IS AT A LOWER TEMPERATURE..
  4. HEAT ENERGY AND OTHER FORMS OF ENERGY ARE INTERCHANGEABLE.
  5. THE METALLIC PARTS OF THE EVAPORATING AND CONDENSING UNITS USE METALS WITH HIGH HEAT CONDUCTIVITY.

 

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