Computer Controlled Two-Stage Compression Refrigeration Unit

The Computer Controlled Two-Stage Compression Refrigeration Unit, is clearly organized and represents a two-stage compression refrigeration system to obtain low temperatures.

ATENG 12779 — Computer Controlled Two-Stage Compression Refrigeration Unit

(for main items)

• With this unit there are several options and possibilities:
• Main items: 1, 2, 3, 4, 5 and 6.
• Optional items: 7, 8, 9, 10 and 11.
• Let us describe first the main items (1 to 6):
• 1 ATENG 12779. Unit:
  Bench-top unit.
  Anodized aluminum frame and painted steel panels.
  Main metal elements made of stainless steel.
  Diagram in the front panel with distribution of the elements similar to the real
  one.
• High pressure hermetic compressor:
• Cylinder capacity: 9 cm³.
• Power consumption: 375 W approx.
• Refrigeration capacity: 590 W at -10/32 °C.
  Wattmeter for compressor power measurement.
• Low pressure hermetic compressor:
• Cylinder capacity: 25.95 cm³.
• Power consumption: 550 W approx.
• Refrigeration capacity: 1750 W at -10/32 °C.
  Wattmeter for compressor power measurement.
• Adjustable intermediate refrigeration system:
  Heat exchanger.
  Thermal expansion valve.
  Flow sensor for the refrigerant.
  Valves for connection or disconnection from the refrigeration system.
  Heat exchanger for additional subcooling of the liquid refrigerant with valves to
  connect or disconnect it from the refrigeration system.
• Computer controlled condenser with fan. Air flow: 980 m³/h.
• Storage tank. Capacity: 0.5 l.
  Filter for the refrigerant.
• Unit: ATENG 12779
• Refrigerant flow sensor, range: 5 – 60 l/h.
  Computer controlled solenoid valve.
  Thermal expansion valve.
• Refrigeration chamber. Dimensions: 430 x 485 x 340 mm. Includes:
• Evaporator with fan for a uniform temperature distribution. Air flow: 50 m³/h.
• Computer controlled finned heating element to create a thermal load. Power: 150 W. Wattmeter to
  measure the power of the heating element.
• Liquid separator to prevent liquid from entering the compressors. Capacity: 0.73 l.
  Four high pressure and low pressure switches.
  Seven low and high pressure manometers.
  Four pressure sensors.
  Nine “J” type temperature sensors.
  Enthalpy diagram of R-513a.
  This unit has been designed for the use with the refrigerant R-513a, CFC-free, environmental friendly.
• The complete unit includes as well:
  Advanced Real-Time SCADA and PID Control.
  Open Control + Multicontrol + Real-Time Control.
  Specialized Control Software based on LabVIEW.
  National Instruments Data Acquisition board (250 KS/s, kilo samples per second).
  Calibration exercises, which are included, teach the user how to calibrate a sensor and the
  importance of checking the accuracy of the sensors before taking measurements.
  Projector and/or electronic whiteboard compatibility allows the unit to be explained and
  demonstrated to an entire class at one time.
  Capable of doing applied research, real industrial simulation, training courses, etc.
  Remote operation and control by the user and remote control for technical support,
  are always included.
  Totally safe, utilizing 4 safety systems (Mechanical, Electrical, Electronic & Software).
  Designed and manufactured under several quality standards.
  Optional ICAI software to create, edit and carry out practical exercises, tests, exams,
  calculations, etc. Apart from monitoring user's knowledge and progress reached.
  This unit has been designed for future expansion and integration. A common expansion is
  the Scada-Net (ESN) System which enables multiple students to simultaneously
  operate many units in a network.