Showing posts with label lecture note. Show all posts
Showing posts with label lecture note. Show all posts

Wednesday, March 4, 2009

Heat Transfer

Heat transfer is the transition of thermal energy from a heated item to a cooler item.

Type of heat transfer;

  • Conduction

  • Convection

  • Radiation



Conduction is the transfer of heat between object that are in direct contact with each other.












Convection is the transfer of heat by movement of a heated fluid and occurs into a fluid or within a fluid, and cannot happen in solids.


Radiation is the transfer of heat energy through empty space. No medium is necessary; radiation works even in and through a perfect vacuum.