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The Three Types of Heat Transfer
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The Three Types of Heat Transfer
By Jordan Mitchell, Leona DeRango,
and Simon Dungan-Seaver
Radiation
Conduction
Bibliography
The transfer of heat through solids or stationary fluids by physical interaction of partials, vibration of solids and collision of fluids.
An example of conduction would be burning your skin on a hot pan, boiling a pot of water, or warming a penny in your hand.
Radiation is the third type of heat transfer. It is the only type that dosen't require a medium to travel. It transfers heat by emitting electromagnetic waves through any matter above 0 degrees Kelvin.
Examples of this kind of heat transfer include: the sun's rays traveling through space to keep us from freezing to death, a fire warming your hands, or micowaves warming our food.
"Examples of Heat Conduction." YourDictionary. N.p., n.d. Web. 08 Apr. 2015
"Difference Between Three Modes of Heat Transfer (JH14A)." YouTube. YouTube, n.d. Web. 08 Apr. 2015.
"EN43ME Lecture Notes." EN43ME Lecture Notes. N.p., n.d. Web. 09 Apr. 2015.
"Heat Transfer." Heat Transfer. N.p., n.d. Web. 10 Apr. 2015.
Airframe and Powerplant Mechanics: General Handbook. Washington: Dept. of Transportation, Federal Aviation Administration, Flight Standards Service, 1976. Print.
Convection
Similarities and Differences:
Similarites:
-All transfer heat in some way.
-Convection and conduction need a medium.
-They all effect the absorbtion of heat.
-Convection and conduction is a slower process of heat transfer
-There is not always a specific paths in convection and conduction
Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it.
An example of convection is air leakage. Air leakage is when warm air in a home flows outside through small holes to equalize the temperatures between the outside and inside of the house.
Differences:
-Radiation does not require a medium.
-Convection can only use fluids.
-Conduction happens via physical contact.
-Radiation can exist in a vacuum.
-Radiation is a fast form of heat transfer and can travel at the speed of light.
-Radiation travels in a straight line
Natural convection- When fluid movement is created by the warm fluid itself. This is shown in the image below in choice A.
Forced convection- Produces fluid movement by an external source. This corresponds to B in the image below.