Page 164 - Industrial Ventilation Design Guidebook

i 26 CHAPTER 4 PHYSICAL FUNDAMENTALS

FIGURE 4.33 Heat transfer factor representing blackbody radiation for various mean temperature;
and temperature differences.

is e a = 0.05. Calculate by how much the radiation heat transfer is reduced due
to the aluminum sheet; surface temperatures remain constant, and the surfaces
are assumed to be gray.
Without the aluminum sheet,

With the aluminum,