APPARATUS   

The unit consists of a vertical brass pipe heated by a cartridge heater inside it. The pipe

looses heat to atmosphere by natural convection. It is fitted in an enclosure to provide

undisturbed  natural convection currents. Thermocouples are  attached  on the pipe to

measure local temperatures. Heater input is measured on voltmeter and ammeter. Thus

students can determine overall heat transfer coefficient and local transfer coefficients in

natural convection at various heat transfer rates.

SPECIFICATIONS:

1.  Pipe - Brass pipe, 38mm.Dia (od) 500mm. long, fitted with cartridge heater inside.

2.  Thermocouples are fitted along with the length of pipe  7 nos.

3.  Enclosure 200mm. x 200mm. x 800mm. size, with one side of Perspex sheet. 

4.  a)  Dimmerstat       b) Voltmeter and Ammeter     

                    c)  Multichannel digital temperature indicator