Heat conduct in Metals

WL 420

Function

  • The upper region of metallic samples is heated by an electrical heater and the lower section is cooled by a Peltier element. This results in a heat flux from the hot side to the cold.

  • A certain temperature difference is required to maintain the heat flux, depending on the thermal conductivity and length of the sample. The temperature difference is measured and is an indicator for the thermal conductivity. The various metallic materials make it possible to determine different thermal conductivities. Materials consisting of several layers can also be investigated. To do this, two different samples are arranged in series.

Accurate measurement

  • thermal disturbance variables are minimised

Quick experiments

  • the required temperature difference is quickly reached thanks to active cooling

  • no cooling water is required

Specifications

  • investigation of the thermal conductivity of different metals

  • continuously adjustable heater

  • Peltier element as cooler

  • 11 samples made of 5 metals, different lengths

  • display of temperatures and power consumption 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

  • time dependency until the steady state is reached

  • calculate the thermal conductivity λ of different metals

  • calculate the thermal resistance of the sample

  • heat transfer with different samples connected in series

  • 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 different metals on heat conduction

  • 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

Peltier element

  • cooling capacity 56,6W

Heater

  • heating power 30W

  • temperature limitation: 150°C

Samples Ø 20mm

Length between measuring points

  • 5x 20mm (copper, steel, stainless steel, brass, aluminium)

  • 5x 40mm (copper, steel, stainless steel, brass, aluminium)

  • 1x 40mm with turned groove (aluminium)

Measuring ranges

  • temperature: 5x -25…325°C

  • heating power: 0…50W

230V, 50Hz, 1 phase

230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase

UL/CSA optional

Dimensions and weight

  • LxWxH: 670x350x480mm

  • Weight: approx. 18kg

Required for operation

  • PC with Windows