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WL 230 Condensation Unit
Education / GUNT Hamburg / Thermal Engineering and HVAC / Fundamentals of Thermodynamics /

The experimental unit provides clear demonstrations of condensation processes in a glass cylinder. WL 230 has one condensation pipe with a polished gold-plated surface for dropwise condensation, and one condensation pipe with a matt surface for film condensation. The condensers are water-cooled. The cooling capacity can be determined. Sensors provide all relevant data which is indicated on digital displays. The measured values can be read on digital displays. The measured values are also transmitted directly to a PC via USB for further evaluation. The data acquisition software is included.

  The experimental unit WL 230 gives the student the opportunity to plot the vapour pressure curve for water during an experiment. Therefore the onset of the boiling of water is observed at different pressures in the reactor. The corresponding temperatures are noted. This experiment simplifies the understanding of the complex relationships in thermodynamics.

Learning Objectives / Experiments

- Dropwise and film condensation
- Determination of the heat transfer coefficient during condensation
- Effect of non-condensable gases (air) on the condensation process
- Effect of pressure and temperature on the condensation process


[1] Demonstrates the process of water condensation
[2] Heater adjustable
[3] Process tank made of glass

[4] 2 condensation pipes with different surfaces to realise film condensation (copper, sand blasted) and dropwise condensation (copper, gold plated)
[5] Copper piping 
[6] Pressure switch and safety valve for protection

[7] Display of measured data on digital displays
[8] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista

Technical Data

Heater: power: 3kW, adjustable

Condenser pipes

- 1x copper, sand blasted

- 1x copper, gold plated 

- surface area: 36.18cm²
Water jet pump

- required water pressure: 0.5bar

- flow rate: 4...12L/min

- final pressure: 16mbar

Process tank: pressure: 2bar absolute

Measuring ranges

- pressure: 0...4bar absolute

- flow rate: 2x 0,2...6L/min

- temperature: 3x 0...200°C (thermocouple),

  4x 0...100°C


Dimensions and Weight
l x w x h: 900 x 450 x 820 mm
Weight: approx. 70 kg
Required for Operation
230V, 50/60Hz, 1 phase or 230V, 60Hz/CSA, 3 phases
Cooling water: rqd. pressure 1bar, max. 1200L/h
Scope of Delivery

1 experimental unit

Destilled water, 5L

2 hoses

1 LabVIEW software CD + USB cable

1 manual

Order Details
060.23000  WL 230  Condensation Unit