Heat conduction and convection
WL 430
Function
The experimental unit demonstrates the combination of heat conduction and convection using the example of a cooling fin. The typical temperature profile along a cooling fin is shown.
A metal round rod heated on one side serves as a model for the cooling fin. The heat is conducted through the round rod and dissipated to the ambient air.
In addition to performing the experiment with still air (free convection), experiments can be performed with flowing air (forced convection) by using a fan.
Different materials and dimensions of the round rods as well as freely selectable flow velocities allow for a wide variation of the essential parameters.
Accurate temperature measurements
active thermal insulation of the heater reduces unwanted heat fluxes
minimum interference of the flow and temperature field thanks to components matched to each other
Optimum experiment conditions
position of the sample in an open environment allows for optimum realisation of free convection in still air
Specification
investigate heat conduction and convection using the example of a cooling fin
cooling fin: sample heated at one end, metal
6 samples made of different materials and with different lengths
6 fans for experiments with forced convection
continuously adjustable heating and fan power
display of temperatures, heating power and air velocity 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 ext. workstations with GUNT software for observation and evaluation of the experiments
E-Learning: multi-media didactic materials accessible online
learning objectives/ experiments
effect of heat conduction and convection on heat transfer
effect of free and forced convection on heat transfer
calculate convective heat transfers
effect of different materials on heat conduction
effect of sample length on heat transfer
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 heat conduction and convection on heat transfer
experiments with still air on free convection
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
Heater
heating power: 30W
temperature limitation: 160°C
6x fan
max. flow rate: 40m3/h
nominal speed: 14400min-1
power consumption: 7,9W
4x samples, short
length dissipating heat: 104mm
heat transfer area: 32,6cm2
copper, aluminium, brass, steel
2x samples, longlength dissipating heat: 154mm
heat transfer area: 48,4cm2
copper, steel
Measuring ranges
flow velocity: 0…10m/s
temperature: 8x 0…325°C
heating power: 0…30W
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
UL/CSA optional
Dimensions and weight
LxWxH: 670x350x280mm
Weight: approx. 17kg
Required for operation
PC with Windows