Home           Products           Company           Contact us     
> Fundamentals of Thermodynamics
> Applied Thermodynamics
> Renewable Energies
> Power Engines and Machines
> Internal Combustion Engines
> Refrigeration and Air Conditioning Technology
> Heating and Ventilation in Buildings
> Sanitary Systems
Products  |  Thermal Engineering and HVAC  |  Fundamentals of Thermodynamics  |  WL 220
WL 220 Boiling Heat Transfer Unit Show data sheet (pdf file) Print page
Technical Description

  The transparent process tank makes it possible to clearly observe the evaporation process at the heated cylinder. The cylinder is used as a model to demonstrate a fire tube heated from the inside.

  An integrated water-cooled condenser allows for a continuous boiling process. The special liquid used evaporates at low temperatures. Relevant 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. 

Learning Objectives / Experiments

- observing different forms of evaporation (nucleate,

  film boiling)
- calculation of heat transfer coefficient
- effect of temperature and pressure on the
  evaporation process


* Experimental unit to demonstrate evaporation

  in a steam boiler fire tube1

* Processing of measured values on a PC1
* Operation with environmentally-friendly, special low-
  boiling liquid1

Alternative products
WL 210 -- Flow Boiling Demonstration
WL 230 -- Condensation Unit

[1] evaporation on a fire tube
[2] evaporation with heating element
[3] transparent process tank
[4] copper piping
[5] CFC free evaporation liquid Solkatherm SES36
[6] safety valve

[7] pressure switch for additional protection of heating circuit, adjustable
[8] digital displays for measured values
[9] GUNT software for data acquisition via USB under Windows Vista or Windows 7


Technical Data


- power: 250W, continuously adjustable

- surface area: 0,001875m
Cooler, copper coil

- diameter: 80mm

- surface area: 0,0578m
Safety valve opens at 2,2bar

Tank: 2,85L


Measuring ranges
- pressure: 0...4bar absolute
- power: 0...300W
- flow rate: 0,05...1,8L/min
- temperature thermocouple: 0...200C
- 1x temperature: -5...105C

- 3x temperature: 0...130C

Dimensions and Weight
LxWxH: 900x450x820mm
Weight: approx. 60kg
Required for Operation

230V, 50/60Hz, 1 phase, 120V, 60Hz/CSA, 1 phase

Water supply and drain

Scope of Delivery

1 experimental unit

2x refrigerant SES36

1 GUNT software CD + USB cable

1 set of hoses

1 manual

Order Details
060.22000  WL 220  Boiling Heat Transfer Unit
© 2005 G.U.N.T. Gerätebau GmbH