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Heat Transfer In Natural Convection

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Heat Transfer In Natural Convection

Heat Transfer In Natural Convection

Technical Description:

  • 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.
  • The heat input to the heater is measured by a Digital Ammeter and a Digital Voltmeter and is varied by a variac. The tube surface is polished to minimize the radiation losses.

Control Panel:

  • Digital Voltmeter: 0-300 Volt
  • Digital Ammeter: 0-2 Amp
  • Variac: 0-230 V, 2 Amp
  • Digital Temp.Indicator: 0-300°C, with multi-channel switch


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Learning Objectives/Experiments:

  • To determine average heat transfer coefficient under natural convection

Required for Operation:

  • Table for set-up support