Changes of state in the refrigeration circuit Energetic analyses of the refrigeration cycle; transparent components offer insights into the changes of state Features - visualisation of the refrigeration circuit components: transparent components, augmented reality interface - real time log p-h diagram - Game-Based Learning: learn complex theory easily and playfully Learning objectives/experiments - design and operation of a compression refrigeration system - observe the evaporation and condensation of the refrigerant - representation of the thermodynamic cycle in the log p-h diagram - energy balances - determination of important characteristic variables -- coefficient of performance -- refrigeration capacity -- compressor work - GUNT Science Media Center, develop digital skills -- retrieve information from digital networks -- use digital learning media, e. g. Web Based Training (WBT) -- augmented reality for the visualisation of the components in the refrigeration circuit Specification [1] demonstration of the processes in a refrigeration circuit [2] augmented reality: visualisation of the refrigeration circuit components [3] for better process monitoring the evaporator and condenser are of transparent design [4] evaporator and condenser with pipe coil [5] expansion valve in the shape of a float valve [6] pressure switch to protect the condenser [7] temperature sensor, power meter, manometer in refrigeration circuit, flow meter for hot and cold water [8] safety valves at the evaporator and condenser [9] refrigerant R1233zd, GWP: 1 [10] WL 110.20 and ET 350.01 provide the cold and hot water supply for optimum experiment conditions [11] data acquisition via PLC on internal USB memory, access to stored measured values via WLAN/LAN with integrated router/LAN connection to customer's own network or direct LAN connection without customer network [12] digital multimedia teaching material online in the GUNT Science Media Center: E‑Learning course, worksheets, videos Technical data PLC: Weintek cMT3162X Hermetic piston compressor, capacity: 18,3cm3 Evaporator capacity: approx. 2450mL Condenser capacity: approx. 2450mL Refrigerant: R1233zd, GWP: 1, filling volume: 2kg, CO2-equivalent: 0t Measuring ranges - temperature: 8x -20...200°C - pressure: 2x -1...1,5bar - flow rate: 2x 0...1620cm3/min (water) - power: 0...1200W 230V, 50Hz, 1 phase; 230V, 60Hz, 1 phase 120V, 60Hz, 1 phase; UL/CSA optional LxWxH: 1100x470x670mm Weight: approx. 50kg