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Linear Heat Conducton Module Heat Transfer Training Equipment Teaching Equipment

Item No.: MR024
Linear Heat Conducton Module Heat Transfer Training Equipment Teaching Equipment
Description
MR024 Linear Heat Conducton Module Heat Transfer Training Equipment Teaching Equipment

Features
One of four optional experiments for the Heat Transfer Experiments Base Unit
Fits quickly and easily onto the Heat Transfer Experiments Base Unit and water connections have self-sealing
quick connectors needing no tools
Shows the principles of linear heat conduction along a rod of uniform diameter
Clear schematic printed on the baseplate aids student understanding
Allows the thermal conductivity of various materials to be measured
Safe, low-voltage heater with over-temperature cut-out
Description
This experiment has a solid brass bar of circular crosssection, made in two sections with an interchangeable middle section. It mounts on a base plate with a clear schematic of the experiment layout. The fi rst brass section includes two thermocouples and the electric heater (heat source). The second brass section includes a small water cooled chamber (heat sink) and two more thermocouples.

The interchangeable middle sections (supplied) are of different metals:
Brass, so the bar becomes one length of brass
Aluminium
Stainless steel
Copper
Each middle section has three thermocouples to enable the calculation of thermal conductivity of specimens using two diff erent methods:
The absolute method
The comparative cut-bar method
The electric heater and thermocouples connect to sockets on the Heat Transfer Experiments Base Unit, which also supplies the cold water feed and drain for the heat sink. Students turn on the cooling water fl ow and adjust the heater power until the experiment reaches equilibrium they then record the temperatures as the heat conducts along the bar. Insulation around the bar reduces heat loss by convection and radiation, so that the results should be close to the theory for simple linear conduction only. (Heat loss can also be simply estimated using a pre-determined TecQuipment chart and table)

Learning Outcomes
Demonstration and calculations of linear heat conduction
Calculation of the thermal conductivity (k value)
Demonstration of the eff ectiveness of thermal paste
Demonstration and calculations of thermal resistances (R value) in series
Demonstration of 'thermal lag'
Essential Base Unit
Heat Transfer Experiments Base Unit
Operating Conditions
Operating environment:
Laboratory
Storage temperature range:
25°C to +55°C (when packed for transport)
Operating temperature range:
+5°C to +40°C
Operating relative humidity range:
80% at temperatures < 31°C decreasing linearly to 50% at 40°C
- Heated Section. Material: Brass, Ø 25mm.
- Cooled Section. Material: Brass, Ø 25mm.
- Brass Intermediate Specimen: Ø 25mm x 30mm long.
- Stainless Steel Intermediate Specimen: Ø 25mm x 30mm long.
- Aluminium Intermediate Specimen:Ø 25mm x 30mm long.
- Reduced Ø Brass Intermediate Specimen: Ø 13mm x 30mm long