Heat transfer by radiation
wl 460
Function
Experiments on heat radiation are demanding. In order to achieve sufficient radiant power, the radiating surfaces have to reach very high temperatures.
The main component of the experimental device is a thin, disc-shaped metal sample. One of different metallic samples is placed on a thermocouple and heated contact-free via a highly concentrated beam of light. The thermal radiation emitted by the sample is measured by a thermopile. In order to be able to measure the radiation at different distances, the thermopile is mounted on a movable sled.
Good measuring results
minimisation of heat conduction at the samples
insensitive to thermal disturbances from the environment
Quick experiments
rapid heating of the samples by intensive heat radiation and small sample dimensions
rapid cooling of the sample
Specification
investigation of heat radiation on different surfaces heated by a concentrated beam of light
generation of the concentrated beam of light with a continuously adjustable halogen lamp and a parabolic reflector
6 different metallic samples
thermopile on a movable carriage for measuring the heat radiation
display of temperature and radiation intensity in the software
due to integrated microprocessor-based instrumentation no additional devices with error-prone wiring are required
functions of the GUNT software: system operation, data acquisition, educational software
network capability: LAN/WLAN connection of any number of external workstations with GUNT software for observation and evaluation of the experiments
E-Learning: multi-media didactic materials accessible online
Learning objectives/ experiments
verify Lambert’s inverse-square law
verify Stefan-Boltzmann law
verify Kirchhoff’s law
study transient behaviour
create power balances
produce logarithmic diagrams for evaluations
GUNT-E-Learning
multi-media online course, which enables learning independent of time and place
access via Internet browser
educational software including different learning modules
course in the fundamentals
detailed thematic courses
check through targeted review of the learning objectives
authoring system with editor that enables you to integrate your own, local content into the educational software
Features
effect of different surfaces on heat transfer by radiation
network capability: network access to ongoing experiments by any number of external workstations
GUNT software: operation and control of the experimental unit, data acquisition and educational software
E-Learning: multi-media didactic materials accessible online
Technical Data
Halogen lamp
electrical power 150W
max. temperature: approx. 460°C
Aluminium samples, Ø 20mm
1x matt anodized on both sides
1x painted on both sides (high-temperature paint)
1x matt anodized with one painted side
Copper samples, Ø 20mm
1x nickel-plated
1x bright, oxidizes over time
Stainless steel sample, Ø 20mm
1x bright, oxidizes over time
Measuring ranges
temperature: 0…780°C
radiation intensity: 0…1250W/m2
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
UL/CSA optional
Dimensions and weight
LxWxH: 670x350x370mm
Weight: approx. 18kg
Required for operation
PC with Windows