Educational Experiments

This trainer allows multiple laboratory experiments including:

Refrigeration System Study

• Study of refrigeration system design with 2 evaporators
• Analysis of refrigeration and freezing chamber operation
• Study of component arrangement and system flow

Component Function Analysis

• Compressor operation and performance
• Condenser heat rejection process
• Evaporator cooling process
• Thermostatic expansion valve behavior
• Evaporation pressure controller operation
• Pressure switch control
• Electric defrost heater function

Thermodynamics Experiments

• Thermodynamics of refrigeration cycle
• Effect of refrigerant supercooling
• Refrigeration process analysis using log p-h diagram
• Determination of:
  • Coefficient of Performance (COP)
  • Refrigeration capacity
  • Compressor work
  • Important characteristic variables

Fault Diagnosis Training

• Troubleshooting refrigeration components
• Fault identification in system operation
• Performance analysis under abnormal conditions

Key Features

• Complete refrigeration system with:
  • Compressor
  • Condenser
  • Two evaporators
  • Thermostatic expansion valve
  • Evaporation pressure controller
  • Pressure switch
  • Electric defrost heater
• Dual chamber configuration:
  • Insulated refrigeration chamber
  • Insulated freezing chamber
• Freezing chamber equipped with:
  • Fan cooling system
  • Electric defrost heater for defrosting process study
• Refrigeration chamber includes evaporation pressure control for process analysis.
• Inner heat exchanger used for refrigerant supercooling to improve system efficiency.
• Supports individual or parallel operation of evaporators via valves.
• Pressure switches installed on compressor intake and delivery sides.
• Process schematic panel with:
  • Signal lamps indicating operating conditions
  • Quick system overview for students
• Digital sensors and displays for real-time measurement of operating parameters.
• Optional DAQ (Data Acquisition System) for direct PC connectivity and data monitoring.
• Software option enables thermodynamic cycle visualization on log p-h diagram.

Technical Specifications

• Refrigeration circuit with:
  • Compressor
  • Condenser
  • 2 evaporators
  • Thermostatic expansion valve
  • Evaporation pressure controller
• Chambers:
  • Refrigeration chamber
  • Freezing chamber
• Refrigerant:
  • R134a (CFC-free)

Compressor Data

• Power Consumption:
  • Approx. 491 W at 5/40°C
• Refrigeration Capacity:
  • 1104 W at 5/40°C

Measuring Ranges

• Temperature:
  • 12 x -50°C to 120°C
• Pressure:
  • 1 x -1 to 15 bar
  • 3 x -1 to 9 bar
  • 3 x 1 to 24 bar
• Power:
  • 0 to 1125 W
• Flow Rate:
  • 1.5 to 25 L/h