The device consists of a circular pipe through which air is forced, promoting heat loss by forced convection. An electrically powered heater with input control continuously adds heat flux to the pipe. Surface temperatures are measured at various points along the length of the pipe, while air temperature is monitored at both the inlet and outlet of the test section. This setup allows students to calculate both local and global forced convection heat transfer coefficients at different airflow rates and heat flux values.

Experimental Objective

·        Determine the average surface heat transfer coefficient for a pipe under forced convection.

·        Compare heat transfer coefficients at various airflow and heat flow rates.

·        Plot the surface temperature distribution along the pipe length.

Specifications 

·        Test pipe: 32 mm NB GI pipe, 500 mm length, externally heated by a band heater.

·        Centrifugal blower with a 2 A capacity and flow control valve to regulate airflow through the test pipe.

·        Orifice meter with differential water manometer for airflow measurement.

·        Voltmeter and ammeter to monitor heater power input.

·        Multichannel digital temperature indicator to measure temperatures at multiple points along the pipe.

·        Comprehensive technical manual included.

Bench size approximately 1meter x 0.75meters at working height.

239V, 15A AC supply with earthing connection.