The device comprises of a vertical brass pipe that is internally heated by a cartridge heater. Natural convection causes the pipe to lose heat to the atmosphere. It is enclosed so that natural convection currents can flow freely. To gauge the temperatures in the area, thermocouples are fastened to the pipe. Voltmeters and ammeters are used to measure heater input. Students can calculate the global and local heat transfer coefficients of natural convection at various heat transfer rates in this way.

SPECIFICATIONS

• Pipe – Brass pipe, 38mm. dia. (OD) 500mm. long, fitted with cartridge heater inside.
• Thermocouples are fitted along with the length of pipe for Temperature measurement – 7 nos.
• Enclosure 200mm. x 200mm. x 800mm. size, with one side of Perspex sheet.
• Measurements & Controls

  a) A Dimmerstat for heater input control.

  b) Voltmeter and Ammeter for heater input measurement.

  c) Multichannel digital temperature indicator.

 A technical manual accompanies the unit.

SERVICES REQUIRED:-

• Bench area of 1.5m x 0,75m. at working height.
• 230v, 5A, AC, electric supply with earthing connection.