Introduction to Walk-In Freezers : Walk-in Freezer Types

 

• Introduction:

  • This chapter covers different types of walk-in freezers.
  • Types: self-contained, remote, and multiplex.

• Self-Contained Units:

  • All-in-one units with all components together.
  • Compressor and condenser are installed together.
  • Top-mounted units have these components on the roof; side-mount units have them on insulated wall panels.
  • Typically placed outside the building.
  • Make up over 90% of commercial refrigeration in freezer models.

• Remote Walk-in Freezers:

  • Components (compressor, condenser, insulated walk-in space) are farther apart.
  • Condenser and compressor are remote from the evaporator and walk-in space.
  • Can be on the roof or in a separate room.
  • Single split configuration: one evaporator per condenser and compressor.

• Multiplex Systems:

  • Multiple evaporators and integrated condensers in a central system.
  • Multi-split remote system supporting different temperature zones.
  • Greater energy efficiency with multiple units.
  • Common in supermarkets.

• Operational Differences:

  • No operational differences, but different piping layouts.
  • Remote units have piping to the outdoor unit.
  • Self-contained units are easier and cheaper to install, making them popular.
  • Self-contained units are usually built outdoors, rejecting heat outside.
  • Indoor units are easier to access and clean but may increase air conditioning costs due to heat rejection inside.

• Pros and Cons:

  • Self-contained units:
    • Easy and cheap installation.
    • Popular for businesses.
    • Outdoor placement rejects heat outside.
  • Remote and multiplex units:
    • Usually placed indoors.
    • Easier access and cleaning.
    • No extra security costs.
    • Indoor placement increases building temperature.