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Heat Transfer
 

Heat Transfer

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Brief presentation on Heat Transfer

Brief presentation on Heat Transfer

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    Heat Transfer Heat Transfer Presentation Transcript

    • Heat Transfer Conduction, Convection and Radiation
      Instructor: Kristen Adams
      Course: Physics 202
      LFCC
    • Facts About Heat Transfer
      Heat is always transferred from HOT to COLD
      Heat is never transferred from COLD to HOT
      There are three different ways that heat is transferred:
      conduction, convection and radiation
    • Conduction
      Metals are good conductors of heat
      Non-metals are good insulators
    • ConductionHeat is transferred through collisions between molecules
    • Convection
      Occurs primarily in liquids and gases (fluids)
      Heat is transferred by movement of material
    • RadiationHeat is transferred by electromagnetic waves
    • QuestionIn the picture below are three hands, I’ll call them left, top and right.Which hand is experiencing heat transfer through-conduction ?-convection ?-radiation ?
    • Sources
      Illustration: “heat conduction in a crystal”; attributed to Cdang; some rights reserved under the CC license Attribution ShareAlike 3.0 http://commons.wikimedia.org/wiki/User:Cdang/Gallerie_d%27images/Thermodynamics_and_chemistry
      Illustration: “convection_cells”; attributed to theresaknott (original), Joanjoc version without text; some rights reserved under the CC license Attribution ShareAlike 3.0; commons.wikimedia.org/wiki/File:Convection_ce...
      Photo: the sun with prominence; public domain; http://nasaimages.org
      Photo: “radiation, convection, conduction”; attributed to Waifer X, some rights reserved under the CC license Attribution 2.0 Generic; http://www.flickr.com/photos/waiferx/2721036539/