UNSTEADY STATE HEAT TRANSFER

A sturdy, bench mounting frame contains a hot water vessel and instrumentation.

A controller switches the power to an electric heater to keep a constant ‘bulk’ water temperature inside the vessel. A temperature controller maintains a constant water temperature for the test shape. Precision instruments measure the temperatures at key points, shown on clear multi-line displays.

The test shapes are of different dimensions and material to give different heat transfer areas and thermal conductivities. This gives multiple experiments in heat transfer.

The student immerses the test shape and measures the transient temperature changes caused by the sudden immersion. They then immerse the other test shapes and compare the results to find how their different surface area, shape and thermal properties affect the heat transfer. 

The vessel has a large volume of water compared to the test shapes, so their immersion has a negligible affect on the bulk temperature.

Students can do tests with or without a computer connected. However, for quicker tests with easier recording of results, TD1009V comes with VDAS® Onboard a USB cable (supplied) connects from the unit to a suitable PC (not supplied running TecQuipment’s VDAS® software that captures, records and displays data. 

The software is intuitive and easy to use, with clear and convenient data display options. It looks similar and works in a similar way for each TecQuipment VDAS® compliant product. This saves time as students do not have to learn to use new software when changing experiments.

VDAS® software features include:

• Recording data manually or automatically
• Data capture set by time or intervals
• Display of real-time data, in digital form or as an analogue meter
• Real-time traces of analogue signals
• Logging data for printing and later analysis
• Exporting data for use by other software
• Performing real-time calculations to generate userdefined data
• Creating and printing charts and data tables
• Customisable layouts

Key Features:

• Includes TecQuipment’s Versatile Data Acquisition System VDAS® Onboard, for data acquisition via USB
• VDAS® software includes Heisler charts
• A benchtop module designed for education
• Includes a set of different solid shapes of different materials for multiple experiments
• Simple to use, needs no tools
• Water temperature controller for consistent results
• Clear digital displays of all readings (a computer is not essential to operate it or take readings)