The process of evaporation in heated pipes that occurs in water-tube boilers can be demonstrated. The different phases that appear during evaporation in the pipe can be clearly seen. The double-wall glass evaporation pipe allows the evaporation process to be observed closely. Hot water flows through the outer pipe and evaporates the medium in the inner pipe. The non-toxic liquid used starts to evaporate at 40 to 50°C. Low system pressures can be generated with the built-in water jet pump. The pipe systems are clearly laid out on a metal panel. The hot water circuit consists of an expansion vessel, a circulating pump and heater. An evaporation pipe, vapour collector, water-cooled condenser and return pipe form the evaporation circuit.
Experiments
- Observation of typical forms of evaporation
- Single phase liquid flow
- Bubbly flow
- Slug flow
- Annular flow
- Film boiling
- Drop flow (mist)
- Single phase vapour flow
- Effect on the evaporation process by
- Flow rate
- Temperature
- Pressure
Specifications
- Evaporation in a water pipe evaporator
- Laboratory trolley with strong HDF sheet
- Evaporation pipe made of double-wall glass, heated with hot water
- Evaporation in inner pipe, heating in the outer sheath
- Circulating pump
- Water jet pump for generating partial vacuum
- CFC free evaporation liquid
