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Solution for Engineering Heat Transfer 2nd Edition Chapter 1, Problem 1

by William S. Janna
196 Solutions 12 Chapters 15997 Studied ISBN: 9780849321269 Physics 5 (1)

Chapter 1, Problem Example 1 : Example 1.1 A fire wall separates...

Example 1.1

A fire wall separates two rooms. In one room, a fire has started. The fire wall is made of stainless steel that is 1/2 in thick. Heat in the room is sufficient to raise the outside surface temperature of one aide of the wall to 350OF. If the thermal conductivity of the metal wall is 9.4 BTU/hr.ft."R, and the heat flux is 6.3 BTU/s.ft'. determine the surface temperature of the other side of the fire wall.

 

Step-By-Step Solution

Example 1.1

Solution

Before making any calculations, let us determine

what is physically occurring. The fire is at a very

high temperature, so radiation heat transfer from the

chemical reaction to the wall is significant. As the

air ncar the wall is warmed, convection to the wall

may be important. On the other hand, depending on

the wall and the air temperatures, the air may be

receiving heat from the wall. Figure 1.3 illustrates

the system, shown with the expected temperature profile.

 

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