Features

• Set-up of the most varied refrigeration circuits using modular component kits1
• Clear arrangement of components

Tesca Basic Refrigeration Trainer Bench 32420 practical experiments relating to the operation of a refrigeration system can be implemented by dealing with differently configured compression refrigeration circuits. The components used are common in refrigeration and therefore closely related to practice.

The base unit 32420 includes the main components of a refrigeration circuit: a condensing unit with compressor, condenser and receiver and a refrigeration chamber with integrated evaporator, fan for forced ventilation and an electric defrost heater. A pressure switch protects the compressor against excessive pressure. The refrigerant flow can be modified via shut-off valves.
Together with the components from e.g. heat exchanger, flow meter or manometer, simple refrigeration circuits are realised. For continued experiments additional refrigeration components are used, e.g. post-injection valve, capacity controller or defrost timer. All components of the training system have ball valves at the connections. Using the required accessory kit, the components are connected into a complete refrigeration system. For the complete experimental setup, laboratory workplace with frame for mounting the components and power supply, is required. The CFC-free refrigerant R134a serves as working medium.
With the service set additional exercises for the filling and evacuation of refrigeration systems are carried out.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Specifications

• Base unit for the refrigeration training system
• Extension with components for basic experiments using simple refrigeration circuits
• Extension with components for advanced experiments in refrigeration systems
• Condensing unit, consisting of hermetic compressor, condenser, receiver, pressure switches and shut-off valves
• Insulated refrigeration chamber with integrated evaporator, electric defrost heater and condensate drip tray
• Refrigeration chamber, condensing unit and power supply equipped with shock-proof lab jacks
• Refrigerant R134a, CFC-free

Technical Specifications

Air-cooled condensing unit
    -     Power consumption: 367W at -10/32°C
    -     Refrigeration capacity: 731W at -10/32°C
    -     Max. volumetric air flow rate: 850m³/h
    -     Receiver: 1,4L
Evaporator with fan
    -     Capacity: 190W at t=2°C, ΔT=8K
    -     Cooling surface: 1,81m²
    -     Max. volumetric air flow rate: 140m³/h
    -     Electric defrost heater: 50W/m

Experiments

• Design of compression refrigeration circuit
• Draining and filling of refrigeration systems
• Operation of refrigeration components
• Cyclic process of cold production
• Fault finding
• Different operating modes of the receiver
  • With and without receiver
  • Pump-down
  • Filling the refrigeration circuit
• compare different expansion elements

Requirements
220 – 240V, 50Hz, AC Power Supply