The experimental unit can be used to demonstrate boiling and evaporation processes in a straightforward manner. The processes take place in a transparent tank. A condenser in the form of a water-cooled tube coil ensures a closed circuit within the tank.

Heating a liquid over a heating surface produces different modes of boiling dependent on the heat flux density. They can accelerate the evaporation process (nucleate boiling) or impair it (film boiling). In practice, a limitation of the heat flux density must be assured in order to prevent damage to the heating surface.

The measured values can be read on digital displays. At the same time, the measured values can also be transmitted directly to a PC via USB. Sensors record the flow rate of the cooling water, the heating power, pressure and temperatures at all relevant points. 

Specification

Evaporation with heating element

Condensation with tube coil

Sensors for pressure, flow rate and temperature with digital display

Safety valve protects against overpressure in the system

Visualisation of boiling and evaporation in a transparent pressure vessel

Pressure switch for additional protection of the pressure vessel, adjustable.

Technical Data:

Heater

Pressure vessel: 2850mL

Condenser: coiled tube made of copper

Filling volume: 1,2kg

Power: 250W, continuously adjustable

Safety valve: 2bar rel.

CO2-equivalent: 0t

Measuring ranges

Power: 0…300W (heater)

Pressure: 0…4bar abs. (tank)

Flow rate: 0,05…1,8L/min (cooling water)

Temperature: 4x 0…100°C

230V, 50Hz, 1 phase

230V, 60Hz, 1 phase

120V, 60Hz, 1 phase.