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Heat Transfer PowerPoint PPT Presentation


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Heat Transfer. Heat is transferred in three basic ways: CCR. Conduction : heat transfer within materials and between objects in contact. Vibrating loose atoms transferring energy to neighbors Conductors – conduct heat well (e.g. metals: silver, copper, iron)

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Heat Transfer

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Heat Transfer

Heat is transferred in three basic ways: CCR


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Conduction: heat transfer within materials and between objects in contact

  • Vibrating loose atoms transferring energy to neighbors

  • Conductors– conduct heat well (e.g. metals: silver, copper, iron)

  • Insulators – poor conductor, delay transfer of heat (e.g. wood, wool, air)

  • (Kinesthetic simulation – pass the ball)


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Convection: heat transferred by flowing currents in a fluid (liquid or gas)

  • Hot air rises (becomes less dense) and cools as it rises

  • Ex. Hot water heating in a home, air currents by lake


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Examples

Weather

Insulation

Cooking


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Radiation: heat transfer by electromagnetic waves, heat rays

  • Needs no material medium (goes through a vacuum)

  • e.g Sun, fire, lamp filament


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Radiation


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Summary


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