NDLI: Recent progress in thermodynamics of radiation—exergy of radiation, effective temperature of photon and entropy constant of photon

Content Provider	Springer Nature Link
Author	Chen, ZeShao Mo, SongPing Hu, Peng
Copyright Year	2008
Abstract	The recent progress on thermodynamic properties of spectral radiant energy in the field of thermodynamics of radiation is reviewed. The effective temperature of photon T $_{ λ }$ representing the energy quality of photon is introduced. The relation between T $_{ λ }$ and the wavelength λ is given as λT $_{ λ }$ =c $_{3}$=5.33016×10$^{−3}$ m·K. The entropy constant of photon is given as s $_{ λ }$=3.72680×10$^{−23}$ J/K. The exergy, entropy and enthalpy of the spectral blackbody radiation, the equilibrium cavity radiation, the radiation flux in open system are discussed by using T $_{ λ }$ and s $_{ λ }$, as well as the entropy change in the process of the state transformation of photon gas. By analyzing the exergy of spectral radiation, the exergy efficiency of spectral radiant energy available for photosynthesis is proved to be higher than that of light energy. The method for the irreversible loss of exergy calculation in radiant energy converters is also discussed.
Starting Page	1096
Ending Page	1109
Page Count	14
File Format	PDF
ISSN	10069321
Journal	Science in China Series E: Technological Sciences
Volume Number	51
Issue Number	8
e-ISSN	1862281X
Language	English
Publisher	SP Science in China Press
Publisher Date	2008-07-06
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	thermodynamics of radiation photon gas exergy photon entropy non-equilibrium thermodynamics Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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