ET 350 Changes Of State In The Refrigeration Circuit Vocational Training Equipment Air Conditioner Training Equipment
Description In a compression refrigeration system a refrigerant flows through the refrigeration circuit and is subject to different changes of state. Here, the physical effect is used that during the transition of the refrigerant from a liquid to a gaseous state energy is required which is removed from the environment (evaporation enthalpy). The experimental unit ET 350 represents a typical refrigeration circuit consisting of a hermetic piston compressor, condenser, expansion valve and evaporator. The evaporator and condenser are transparent to provide good monitoring of the phase transition process during evaporation and condensation. The operation of the float valve as expansion valve is also easy to observe. Before the entry into the evaporator the aggregate state of the refrigerant can be monitored at a sight glass. A water circuit cools the condenser or supplies the cooling load for the evaporator. Cold and hot water and refrigerant flows are adjustable. The low pressure level of the refrigerant used permits the use of an evaporator and condenser out of glass. Temperatures and pressures are recorded and displayed. The key points of the cyclic process can be read and entered into a log p-h diagram. The power of the compressor and flow rates of the water flows and the refrigerant are also indicated. Specification demonstration of the processes in a refrigeration circuit for better process monitoring the evaporator and condenser are of transparent design evaporator and condenser with pipe coil expansion valve in the shape of a float valve pressure switch to protect the compressor temperature sensor, power meter, manometer in the refrigeration circuit, flow meter for hot and cold water and refrigerant water supply via the lab network or via WL 110.20 Water chiller to ensure a maximum water temperature of 16°C safety valves at the evaporator and condenser refrigerant R1233zd, GWP: 1 Technical data Hermetic piston compressor capacity: 18,3cm3 Evaporator capacity: approx. 2800mL Condenser capacity: approx. 2800mL Refrigerant R1233zd GWP: 1 filling volume: 1,2kg CO2-equivalent: 0t Measuring ranges temperature: 8x -20…200°C pressure: 2x -1…1,5bar flow rate: 2x 0…48L/h (water) 0…700L/h (refrigerant) power: 0…1200W 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase 120V, 60Hz, 1 phase UL/CSA optional
