ET 351C Thermodynamics of the refrigeration circuit

GUNT ET 351C

System allows for the thermodynamic investigation of a refrigeration circuit.

It features an open compressor, water-cooled condenser, thermostatic expansion valve, and an indirectly heated evaporator.

The compressor drive utilizes a speed-controlled motor connected via a V-belt, and the motor is mounted on a pendulum bearing for torque measurement.

The system includes a tube evaporator with a hot water circuit acting as a cooling load and a water-cooled coaxial coil heat exchanger as the condenser.

Temperature, pressure, flow rate, speed, torque, and power are all displayed on the equipment. The refrigerant used is R513A with a GWP of 631.

Data acquisition is handled via GUNT software on Windows.

Technical Data & Specifications

• Open Compressor:
  • Refrigeration Capacity: Approx. 965W at a speed of 1450min-1 and 5/40°C
• Heater:
  • Power: 1000W
• Condenser:
  • Capacity: 1300W
• Refrigerant:
  • Type: R513A
  • GWP: 631
  • Filling Volume: 2kg
  • CO₂ Equivalent: 1.3t
• Measuring Ranges:
  • Temperature: 9x -30…100°C, 1x 0…100°C
  • Pressure:
    • 1x -1…9bar
    • 1x -1…24bar
    • 4x -1…15bar
  • Torque (Compressor): 0…10Nm
  • Speed (Compressor): 0…2500min-1
  • Power Consumption (Compressor): 0…1125W
  • Power (Heater): 0…1125W
  • Flow Rate (Water): 5…70g/s
  • Flow Rate (Refrigerant): 0.005…1.5L/min

Power Supply

• 230V, 50Hz, 1 phase
• 230V, 60Hz, 1 phase
• 230V, 60Hz, 3 phases
• UL/CSA (optional)

Dimensions & Weight

• LxWxH: 1520x790x1760mm
• Weight: ~120kg

Required for Operation

• Water connection and drain
• PC with Windows recommended