Secondary controllers in refrigeration systems

So-called secondary controllers are used to ensure the optimum operation of large, complex refrigeration systems. They control the evaporation pressure (KVP), the intake pressure of the compressor (KVL), the delivery capacity of the compressor (KVC), the condensation pressure (WVFX, KVR) and the receiver pressure (KVD, NRD).

• trainer from the practical series for the training of mechatronics engineers for refrigeration
• refrigeration system with different secondary controllers: evaporation pressure controller KVP, capacity controller KVC, condensation pressure controller KVR, pressure-controlled water valve WVFX as condensation pressure controller, receiver pressure controller KVD, start-up controller KVL
• 2 refrigeration chambers: refrigeration and freezing stage
• evaporator selectable via solenoid valves
• adjustable electric heater in the refrigeration chambers as cooling load
• water-cooled coaxial condenser
• pressure measurement at all relevant points in the system
• refrigerant R513A, GWP: 631