Description

The arrangement, using a solid metal disk with temperature measurements at different radii and heat flow radially outward from the centre to the periphery, enables the temperature distribution and flow of heat by radial conduction to be investigated.

On the HT12X the heater power and the cooling water flow rate are regulated by PID controlled via the HT10X via the computer software.

The accessory comprises a solid disk of material, which is heated at the centre and cooled at the periphery to create a radial temperature difference with corresponding radial flow of heat by conduction

• Six K-type thermocouples are positioned at different radii in the heated disk to indicate the temperature gradient from the central heated core to the periphery of the disk
• The radial distance between each thermocouple in the disk is 10mm
• Quick-release connections facilitate rapid connection of the cooling tube to a cold water supply
• Heater can be voltage or PID controlled allowing for the temperature set-point to be achieved rapidly and maintained within 0.1°C
• The HT10X service unit provides the accessory with the cooling water system:

–            A pressure regulator is incorporated to minimise the effect of fluctuations in the supply pressure

–            The cooling water flow rate is measured by a turbine type flow sensor

–            A control valve on the HT10X service unit allows the flow of cooling water to be varied, if required, over the operating range of 0-1.5 l/min. Valve can be PID controlled for improved supply pressure disturbance reduction.

Experiemental Capabilities

• Understanding the use of the Fourier rate equation in determining rate of heat flow through solid materials
• Measuring the temperature distribution for steady-state conduction of energy through the wall of a cylinder (radial energy flow)
• Determining the constant of proportionality (thermal conductivity k) of the disk material