Compression Refrigeration Unit with Different Expansion Valves

The objective of the Compression Refrigeration Unit with Different Expansion Valves, to introduce the student to the complex world of installations with heat pumps, as well as to study and determine the characteristic operation parameters of the unit according to environmental demands (heat, temperature, refrigeration, etc. ), studying the expansion process in detail with different expansion elements.

ATENG 12775 — Compression Refrigeration Unit with Different Expansion Valves

Bench-top unit.

Anodized aluminum frame and panels made of painted steel.

Main metallic elements made of stainless steel.

Diagram in the front panel with distribution of the elements similar to the real one.

• Hermetic compressor, power: 3/8 CV.
• Condenser with fan, air flow: 980 m³/h. Transparent tubes to observe the coolant change of state.
• Storage vessel to prevent a wrong operation of the compressor, capacity: 0.5 l.
  Filter for the coolant fluid.
  Sight glass for the coolant fluid.
• Evaporator with fan, air flow: 980 m³/h. Transparent tubes to observe the coolant change of state.
• Expansion devices:
  Thermal expansion valve.
  Hand expansion valve.
• Capillary tube: Internal diameter: 1.25 mm; Length: 2.2 m. ATENG 12775 detail
• High pressure switch, range: 8 – 32 bar.
• Low pressure switch, range: 0.7 – 4 bar.
• Liquid separator to prevent liquid from entering the compressor, capacity: 0.73 l.
  Solenoid valve.
  Four-ways reversing valve.
  Cold/heat digital thermostat.
  Five manometers distributed at key points of the refrigeration cycle.
  Five “J” type temperature sensors distributed at key points of the refrigeration cycle.
• Refrigerant flow meter, range: 5 – 60 l/h.
  Wattmeter to measure the compressor power.
  Enthalpy diagram of R-513a.
  This unit has been designed for the use with the refrigerant R-513a, CFC-free, environmental friendly.
• Electronic console:
  Metallix box.
  Main switch.
  Temperature sensors connectors.
  Selector for the temperature sensors.
  Digital display for the temperature sensors.
  Switch for the compressor.
  Digital display for the compressor power measurement (Wattmeter).
  Switch for the fan of the condenser.
  Condenser fan controller.
  Switch for the fan of the evaporator.
  Evaporator fan controller.
  Cables and accessories, for normal operation.