Computer Controlled Refrigeration Unit with Open Compressor

The Computer Controlled Refrigeration Unit with Open Compressor, has been designed to carry out basic tests for the study of a vapor-compression refrigeration cycle with an open compressor driven by an electric motor.

ATENG 12766 — Computer Controlled Refrigeration Unit with Open Compressor

(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):
• 1TRCC. Unit:
  Anodized aluminum frame and panels made of painted steel.
  The unit includes wheels to facilitate its mobility.
  Main metallic elements made of stainless steel.
  Diagram in the front panel with distribution of the elements similar to the real one.
• Open compressor, refrigeration capacity: 845 W to 975 rpm in R134a.
• Electric motor, computer controlled: 2200 W, 2900 rpm.
• Variable-frequency drive: 2200 W, 3 HP.
• V-belt, diameter: 900 mm.
• Condenser with fan, computer controlled, air flow: 980 m³/h.
• Storage vessel to prevent a wrong operation of the compressor, capacity: 0.5 l.
  Filter for the working fluid.
  Sight glass for the working fluid.
• Refrigeration chamber, dimensions: 430 x 485 x 340 mm. It includes:
• Evaporator with fan to distribute temperature uniformly, flow of air: 50 m³/h.
• Finned heating element, computer controlled to create a thermal load, power: 150 W.
  Thermal expansion valve.
• High and low pressure switch, range: 0.7 – 4 bar for low pressure and 8 – 32 bar for
  high pressure.
• Liquid separator to prevent liquid from entering the compressor, capacity: 0.73 l.
  Normally closed (NC) solenoid valve.
  Check valve.
• Four manometers:
  Two high pressure manometers.
  Two low pressure manometers.
  Protection cage for the electric motor and the open compressor.
• Unit: ATENG 12766
• Five "J" type temperature sensors:
  Temperature measurement at the outlet of the compressor.
  Temperature measurement at the outlet of the condenser.
  Temperature measurement at the outlet of the expansion.
  Temperature measurement at the outlet of the evaporator.
  Temperature measurement in the refrigeration chamber.
• Two pressure sensors:
• Pressure measurement before the compressor, low pressure range: 0 – 10 bar.
• Pressure measurement after the compressor, high pressure range: 0 – 25 bar.
• Flow sensor for the working fluid, range: 5 – 60 l/h.
  Power sensor for the heating element.
• Speed sensor, range: 0 – 3000 rpm.
• Force sensor to measure the torque, range: 0 – 10 kg.
  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.