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
temperatures
Features
* Simple experimental set-up to investigate the
thermal conduction of liquids and gases
Specification
[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: 0,15m² - mean effective diameter: 39,6mm - gap width: 0,4mm Heater
