The Condensation process experimental unit can be used to demonstrate the different condensation processes using two tubular shaped water-cooled condensers made of different materials. Dropwise condensation can be by by means of the condenser with a polished gold-plated surface. Film condensation forms on the Matt copper surface of the second condenser, thus making it possible to examine film condensation.

Condensation forms when steam meets a medium with a lower temperature than the saturation temperature for the existing partial pressure of the steam. Factors such as the material and surface roughness of the medium influence the heat transfer and thus the type of condensation. Is usually film condensation. Dropwise condensation only forms when the cooling surface is very smooth and poorly wettable, eg Teflon. KnoSLedge of condensation processes is applied eg steam power plants or at distillation processes.

The tank can be evacuated via a water jet pump. The boiling point and the pressure in the system are varied by cooling and heating power. Sensors record the temperature, pressure and flow rate at all relevant points.

Technical details

Specification:

Two water-cooled tubes as condensers with different surfaces to realise film condensation and

Pressure switch and safety valve for safe operation

Controlled heater to adjust the boiling temperature

Visualisation of the condensation process of water in a transparent tank

Water jet pump to evacuate the tank

Sensors for temperature, pressure and flow rate with digital display

Technical data

Condenser

1x tube with matt copper surface

1x tube with a polished gold-plated surface

Heater

Output: 3kW, freely adjustable

Water jet pump

Flow rate: 4…12L/min

Pressure: 16mbar

Safety valve: 2200 mbar absolute

Measuring ranges

Pressure: 0…10bar abs.

Flow rate: 0,2…6L/min

Temperature: 4x 0…100°C, 3x 0…200°C.