Heat Transfer- Summary

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  • Created by: Sally
  • Created on: 21-04-13 09:45
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  • Heat Transfer
    • Heat energy tends to flow away from a hotter object to its cooler surroundings.
    • Heat is transferred by conduction, convection or radiation.
      • Infrared radiation or thermal radiation is the transfer of heat energy by electromagnetic waves.
        • Emission of thermal radiation occurs in solids, liquids and gases. Any object can both absorb and emit heat radiation, whether or not conduction or convection are also taking place.
      • Conduction and convection involve the transfer of heat energy by particles.
        • Conduction is the main form of heat transfer in metals.
        • Convection is the main form of heat transfer in fluids (liquids and gases).
    • The bigger the temperature difference, the faster heat is transferred between a body and its surroundings.

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