Introduction to Radiation Heat Transfer

10 INTRODUCTION TO RADIATION HEAT TRANSFER 4.10A Introduction and Basic Equation for Radiation 

4 Principles of Steady-State Heat Transfer 

In an elementary sense the mechanism of radiant heat transfer is composed of three distinct steps or phases  

The thermal energy of a hot source, such as the wall of a furnace at T, is converted into the energy of electromagnetic radiation waves. 

These waves travel through the intervening space in straight lines and strike a cold object at Tj such as a furnace tube containing water to be heated. 

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