Features
Visualisation of boiling and evaporation
Software for data acquisition
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. This knowledge is applied in practice e.g. when designing steam boilers for steam-powered drives.

Tesca Boiling Process 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. Compared with water, this liquid has the advantage that its boiling point is at 36,7°C (1013hPa), whereby the evaporation process takes place at much lower temperatures and a lower heating power.

Sensors record the flow rate of the cooling water, the heating power, pressure and temperatures at all relevant points. 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. The data acquisition software is included.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Specifications
Visualization  of  boiling  and  evaporation  in  a transparent pressure vessel
Evaporation with heating element
Condensation with tube coil
Safety valve protects against overpressure in the system
Pressure switch for additional protection of the heating circuit, adjustable
Sensors for pressure, flow rate and temperature with digital display
Software  for  data  acquisition  via  USB  under Windows Vista or Windows 7
CFC-free evaporating liquid

Technical Specifications
Heater: power: 250W, continuously adjustable
Safety valve: 2bar rel.
Pressure vessel: 2850mL
Condenser: coiled tube made of copper

Measuring ranges
Tank pressure: 0...4bar abs.
Power of heater: 0...300W
Flow rate (cooling water): 0,05...1,8L/min
Temperature: 4x 0...100°C

Experiments
Visualization of different forms of evaporation
Heat transfer
Effect  of  temperature  and  pressure  on  the evaporation process

Requirement in Laboratory
Ÿ 230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Water connection, drain