AFT081 Evaporation Process Trainer Educational Equipment Thermal Laboratory Equipment
1 Description During the generation of vapour, the medium that is to evaporate runs through different flow forms dependent on the heat transfer area. The medium flows into a tube evaporator as a fluid and exits the tube evaporator as superheated vapour. In practice, the water vapour generated in big systems is used e.g. for heating plants or machine drives. To design steam generators, it is important to have knowledge of the evaporation process with the boiling crises in order to ensure reliable operation. Boiling crises are caused by a sudden deterioration of the heat transfer, whereby the high heat flux density leads to a dangerous increase in the wall temperature. The experimental unit can be used to examine and visualise the evaporation process in its various flow forms. This is done by heating evaporating liquid, R1233zd, in a tube evaporator made of glass. Compared with water, this liquid has the advantage that its boiling point is at approx. 18°C (1013hPa), whereby the entire evaporation process takes place at much lower temperatures and a lower heating power. The pressure can be varied via the cooling circuit. A water jet pump evacuates the evaporation circuit. 2 Specification visualisation of evaporation in a tube evaporator heating and cooling medium: water water supply via the lab network or via Water chiller to ensure a maximum water temperature of 16°C tube evaporator made of double-wall glass heating circuit with heater, pump and expansion vessel safety valve protects against overpressure in the system water jet pump to evacuate the evaporation circuit refrigerant R1233zd, GWP: 1 3 Technical data Heater power rating: 2kW temperature range: 5…80°C Heating and cooling medium: water Pump 3 stages max. flow rate: 1,9m3/h max. head: 1,5m power consumption: 58W Tube evaporator length: 1050mm inner diameter: 16mm outer diameter: 24mm Condenser: coiled tube made of copper Refrigerant R1233zd GWP: 1 filling volume: 1,2kg CO2-equivalent: 0t Measuring ranges pressure: -1…1,5bar rel. temperature: 0…100°C 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase 120V, 60Hz, 1 phase UL/CSA optional
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