Heat Transfer in Natural Convection
The setup consists of a brass tube fitted in a rectangular duct in a vertical position. The duct is open at the top and bottom, and forms an enclosure that serves the purpose of undisturbed surrounding.
One side of the duct is fitted with a transparent acrylic window for visualization. An electric heating element is kept in the vertical tube that in turns heats the tube surface. The heat is lost from the tube to the surrounding air by natural convection. The temperature of the vertical tube is measure by temperature sensors and displayed by a Digital Temperature Indicator with multi-channel switch. A PID Controller is provided for controlling the heat input. Electronic energy meter will be provided to measure the heat input. The tube surface is polished to minimize the radiation losses.
To determine average heat transfer coefficient under natural convection.