Pin Fin Apparatus

a pin type fin heated by a band heater at one end. A centrifugal blower draws air over the fin. Thermocouples are attached along the length of fin to note down the longitudinal temperature gradient. Heat input to the fin is measured from electrical input to the fin. An orifice and water manometer measures airflow. Thus the students can conduct the experiments in natural convection and at various airflow rates, various heat inputs and with fins of different materials. Fins- 12mm. OD. 100mm long, with 5 thermocouples Along the length. Heater- Band heater to heat one end of fin. Airflow duct- 100mm. X 150mm. And ½ mtr. Long, connected at suction of blower and is provided with bell mouth entry. Centrifugal blower of variable speed of suitable capacity provided with orifice and water manometer.