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, long

    • length 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