0
TECHNICAL BRIEFS

On the Entropy Generation Formula of Radiation Heat Transfer Processes

[+] Author and Article Information
L. H. Liu1

School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, People’s Republic of Chinalhliu@hit.edu.cn

S. X. Chu

School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, People’s Republic of China

1

Corresponding author.

J. Heat Transfer 128(5), 504-506 (Oct 21, 2005) (3 pages) doi:10.1115/1.2190695 History: Received July 30, 2005; Revised October 21, 2005

Because thermal radiation is a long-range phenomenon, the local radiative heat flux is dependent on the temperature distribution of the entire enclosure under consideration and is not determined by the local temperature gradient. In the community of heat transfer, traditionally, the conduction-type formula of entropy generation rate is used to calculate the entropy generation rate of radiation heat transfer. In the present study, three counterexamples are considered. The discrete ordinates method is employed to solve the radiative transfer equation and then solve the radiative entropy generation rate. The results show that the traditional formulas of entropy generation rate for heat transfer generally cannot be used to calculate the local entropy generation rate of radiation heat transfer. Only in optically extremely thick situations, the traditional formula of entropy generation rate for heat transfer can be approximately used to calculate the local entropy generation rate of radiation heat transfer.

FIGURES IN THIS ARTICLE
<>
Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

One-dimensional semitransparent slab system

Grahic Jump Location
Figure 2

Radiative heat flux for Example 1

Grahic Jump Location
Figure 3

Radiative heat flux for Example 2

Grahic Jump Location
Figure 4

Radiative entropy generation rate computed using Eq. 2 for Example 2

Grahic Jump Location
Figure 5

Radiative heat flux for Example 3

Grahic Jump Location
Figure 6

Comparison of radiative entropy generation rates for Example 3

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In