Computer Controlled Refrigeration Control Unit with several Compressors

The objective of the Computer Controlled Refrigeration Control Unit with several Compressors, is to introduce the student into the complex world of heat pumps systems, as well as studying and determining the characteristic operation parameters of the unit in function of the environmental requirements (humidity, heat, temperature and cooling, etc. ).

ATENG 12764 — Computer Controlled Refrigeration Control Unit with several Compressors

(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 12764. Unit:
  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.
• Three cooling compressors, computer controlled:
• Technical data of each compressor:
• Power: 1/5 HP, 1.9 A.
• Fridge efficiency: 460 W – 0 °C.
• Cylinder volume: 7.55 cm³.
  This compound system is controlled so that individual
  compressor can be switched depending on the
  performance.
• Water condenser:
• Concentric pipes type. Capacity: 1580 W. Consume
• DT= 8K:170 l/h.
• Coolant accumulation tank, capacity: 1.50 dm³.
  Cooling filter.
  Expansion valve, capillar type.
• Air evaporator, computer controlled. Air flow: 980 m³/h.
  Tank of division of the cooling liquid.
  Two low pressure manometers.
  Two high pressure manometers.
• High pressure control: Unit: ATENG 12764
• Pressure switch: the pressure switch disconnect the
  electric power to the compressor when the pressure in the circuit is higher than the fixed pressure.
• Type: spring, with automatic restart.
• Switch off pressure: 14 bar.
• Restart pressure: 9.5 bar.
• Eight temperature sensors, type “J”:
  Refrigerant temperature in the compressor outlet.
  Refrigerant temperature in the condenser outlet.
  Refrigerant temperature in the evaporator inlet.
  Refrigerant temperature in the compressor inlet.
  Water temperature in the condenser inlet.
  Water temperature in the condenser outlet.
  Environmental temperature.
  Air temperature in the evaporator outlet.
• Two flow sensors:
• Refrigerant flow sensor, range: 5 – 60 l/h.
• Water flow sensor (water condenser), range: 0.25 – 6.5 l/min.
• Two pressure sensors:
• High pressure sensor, range: 0 – 25 bar.
• Low pressure sensor, range: 0 – 10 bar.
  Power measurement form the computer.
  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.
  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.
  3

Complete Technical Specifications (for main items)