The device consists of a vertical brass pipe that is internally heated by a cartridge heater. The pipe loses heat to the atmosphere through natural convection, and it is enclosed in a way that allows convection currents to flow freely. Thermocouples are attached to the pipe to measure temperatures at various points along its surface. Voltmeters and ammeters are used to monitor the heater's input. This setup allows students to calculate both the global and local heat transfer coefficients of natural convection at different heat transfer rates.

·        Demonstrate the superior thermal conductivity of the heat pipe compared to the best conductor.

·        Plot the temperature versus time response of the three pipes.

·        Graph the temperature distribution along the length of each pipe.

Specifications

·        Brass pipe, 38 mm outer diameter, 500 mm length, fitted with an internal cartridge heater.

·        Seven thermocouples positioned along the pipe length for temperature measurement.

·        Enclosure dimensions: 20 cm × 20 cm × 80 cm, with one side made of Perspex sheet.

·        Dimmer stat for precise heater input control.

·        Voltmeter and ammeter to monitor heater power input.

·       Multichannel digital temperature indicator for accurate temperature readings.

Utilities required other than above supply 

Bench size 1.5 meters x 0.75 meters, at working height.

230V, 5A AC electric supply with earthing connection.