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The four horsemen of heat transfer Contents:

Published byScarlett Blake Modified over 8 years ago

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Presentation on theme: "The four horsemen of heat transfer Contents:"— Presentation transcript:

1 The four horsemen of heat transfer Contents:
Conduction Convection Evaporation Radiation

2 Conduction Heat transfer by contact Random wiggling Hot to cold
Flow rate  T, A, material, 1/thickness Simulation Insulation prevents conduction Down/Synthetics Thickness Demo – Ice Melter blocks. Start the radiation demo. TOC

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4 Convection Heat carried away by moving fluid
Much faster than conduction Surface layers Examples: Sauna/cold lake Car radiator Cooling fans on computers Wind chill Firestorms Windbreakers slow down convection Demo – Heat Sinks and smoke box with candle TOC

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6 Evaporation Heat transfer by phase change Cooling process Whee!
Examples Cooling PSU Sweat Poly layers keep skin dry Cotton = death If you always lose the fastest… TOC

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8 Radiation Hot objects radiate photons (black body radiation)
Heating up a poker Bonfire/barn fire/stoves The sun Frost Silver lined blankets/bags reflect radiation back to you Demo – check temperatures on radiation demo TOC

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