The device is a circular pipe that loses heat by forcing air through it by forced convection. A heater powered by electricity that has input control adds heat flux to the pipe continuously. At several locations along the pipe's length, the surface temperature is measured. Air temperature is monitored at the test section's inlet and outflow. The ability to calculate local and global forced convection heat transfer coefficients at different airflow rates and different heat flux values is therefore provided to the students.

Experimental Objectives

• To determine average surface heat transfer coefficient for a pipe by forced convection.
• Comparison of heat transfer coefficient for different airflow rates and heat flow rates.
• To plot surface temperature distribution along the length of pipe.

Specifications

• Test pipe 32mm NB GI pipe 500 mm. long, heated by band heater outside.
• Centrifugal blower to force air through test pipe with How control valve.
• Varianc 2A, capacity to force air through test pipe with flow control valve.
• An orifice meter with differential water manometer.
• Voltmeter and Ammeter to measure heater input.
• Multichannel digital temperature indicator to measures various temperatures.
  

Required Other Items but not Included with above supply

• Bench area of about 1m. x 0.75 m. at working height.
• 239v, 15A, AC, supply with earthing connection.