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Products  |  Thermal Engineering and HVAC  |  Fundamentals of Thermodynamics  |  WL 373
WL 373 Heat Conduction in Gases and Liquids Show data sheet (pdf file) Print page
Technical Description

  This experimental unit enables experiments to be performed on steady-state thermal conduction in liquid and gaseous materials. It comprises a cylindrical heat exchanger with a heated inner cylinder made of aluminium and a water-cooled jacket.

  The medium for the experiment is fed through a gap. The gap between the two elements was selected so that the transfer of heat due to convection can be ignored. Due to the low temperatures and the polished surfaces, the radiation portion of the heat transfer is also negligible. Temperature sensors measure the temperature difference.

Learning Objectives / Experiments

- Steady-state heat conduction in gases and liquids
- Determination coefficients of thermal conductivity
  (e.g. water, oil, air, O2, CO2, steam) at different



* Simple experimental set-up to investigate the

  thermal conduction of liquids and gases


[1] study of the heat conduction of gases and liquids
[2] experiments in annular gap formed by 2 concentric cylinders
[3] experimental media water, oil, air
[4] radiation portion of heat transfer negligible due to low temperatures and polished surfaces
[5] adjustable electric heater
[6] manual valves for flow rate adjustment (cooling water, medium to be investigated)
[7] measuring amplifier with digital displays for temperature difference and heater power and control elements

Technical Data

Heat exchanger
- effective heat transfer area: 0,15m
- mean effective diameter: 39,6mm
- gap width: 0,4mm

- max. power consumption 160W

- switch-off: at 95C

Measuring ranges
- temperature: 0...100C
- power: 0...600W


Dimensions and Weight
LxWxH: 250x400x150mm (experimental unit)
LxWxH: 415x395x165mm (measuring amplifier)
Weight: approx. 15kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase
Cold water supply required
Scope of Delivery

1 experimental unit

1 measuring amplifier

1 syringe 

1 manual

Order Details
060.37300  WL 373  Heat Conduction in Gases
                     and Liquids
© 2005 G.U.N.T. Gerätebau GmbH