Liquid Overfeed System
Liquid Overfeed System

Overfeed systems (re-circulation system) are those in which excess liquid is forced, mechanically or by gas pressure, through organized-flow evaporators, separated from the vapour, and returned to the evaporators. This ensures no oil in the evaporators and no liquid slugs in the compressor leading to high saving in power and maintenance. 

Advantages of liquid overfeed system :

  • Increase in plant efficiency
  • Protection of compressors
  • Hot gas defrosting
  • No effects of fluctuating ambient and condensing conditions
  • Zero pressure drops in the evaporators / overfeed lines
  • Ease of operation
  • Low maintenance
  • Lower discharge pressure
  • Elimination of control valves
  • No need of accumulators with evaporators
  • Increase in compressor life
  • Proper distribution of refrigerant
 
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