Compression Refrigeration Training System
(AR-017)

1 Pressure gauges and temperature digital displays 2 High/low pressure switch 3 Evaporator 4 thermostat 5 Defrost switch 6 Power meter 7 Operation control panel 8 Expansion devices 9 Heat exchanger 10 Sight-glass 11 Filter drier 12 Accumulator 13 condenser 14 compressor

  • Accumulator
    • Volume: 2.35L
    • Temperature range: -35°C … 63°C
    • Operating pressure: 32 bar
  • Pressure switch
    • Cut in range: 0 … 7.5 bars
    • Cut out range: 8 … 32 bars
  • Heat exchanger
    • Operating temperature: 250 °C
    • Maximum pressure: 700 psi
  • Temperature sensor
    • Pt 100 sensor
  • Low Pressure gauge
    • -1 … 25 bars
  • High Pressure gauge
    • 0 … 35 bars
  • Evaporator
    • Surface area: 3.8 m^2
    • Fan air flow: 480 m^3 / h
    • Capacity: 940 watts
  • Compressor
    • Refrigerant: R134a
    • Voltage/Frequency: 208-220V ~ 50Hz
    • Refrigeration Capacity: 7116 btu/h
    • Ambient temperature: 32°C
    • Return gas: 15°C
    • Liquid temperature: 45°C
  • Compression refrigeration training system (AR - 017)
  • Hard copy user manual

Compression Refrigeration training system is an educational unit designed to demonstrate the function and operational behavior of a refrigeration cycle and the change in the state of the refrigerant as it goes through the cycle. It allows trainees to monitor and investigate the temperature and pressure ofthe refrigerant with different expansion devices.

                                     
  • The trainer has a refrigeration cycle which consists of an evaporator coil, compressor, condenser, accumulator, three different expansion devices and heat exchanger.
  • The trainer operation unit contains a high/low pressure switch, thermostat, four pressure gauges, four digital displays, filter drier, sight glass, defrost switch, solenoid valves, power meter, LEDs and switches.
  • The three expansion devices are an expansion valve and two Capillary tubes have different inner diameters.
  • The refrigerant path to the desired expansion device is controlled by manual valves.
  • The refrigerant temperature and pressure which are dependent on the expansion device are measured via sensors at different points throughout the cycle before and after the evaporator & before and after the condenser.
  • The pressure gauges are used to display the pressure at each point.
  • The digital displays provide an accurate reading of temperatures that are measured by the highly sensitive sensors.
  • The trainer filter drier is used to absorb the system contaminants, such as water to prevent acids, and to provide physical filtration.
  • The trainer is provided with a sight-glass to indicate any problem involving the refrigerant, moisture, or contamination in the system and allow trainees to look inside of the system and see the refrigerant state without disrupting the environment within.
  • The pressure switch provides safety to the compressor which takes a protective action in case of any low/high pressure case occurs.
  • The thermostat is used to prevent overheating and to control the temperature of the evaporator during the refrigeration cycle.
  • The led indicator provides warning for any low/high pressure case occurred.
  • The heat exchanger allows transferring heat between the refrigerant comes from the filter and the output of the evaporator before passing through the expansion device to reduce the pressure, thus increase the efficiency.
  • A defrost switch is supplied to monitor and control the temperature on the expansion devices to prevent ice formation.
  • The refrigerant receiver is incorporated into the trainer to be able to study the effect of the refrigerant receiver on the coefficient of performance C.O.P
  • The trainer is provided with two schematic diagrams to demonstrate the system operation.
  • The trainer includes a main power switch, ON/OFF switch and an emergency switch.