A novel method for estimating the entropy generation rate in a human body

Mohammad Azizur Rahman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

The main objective of this study is to show a method for calculating entropy generation (Sgen) in a human body under various environmental and physiological conditions. The Sgen in a human body is a measure of activeness of motions, reactions, and irreversibility of processes occurring in a body and is a kind of holistic and thermodynamic index, which characterizes a human body as a whole. Human body at healthier and normal condition generates the least amount of Sgen. Heat transfer over a human body, activity (at rest, Sgen = 0.21 JIsK or exercise, Sgen. = 2.19 J/sK or at death, Sgen = 0 J/sK), ambient, body and mean radiant temperatures, enussivily and absorbily of human skin, internal heat elimination, body weight and height, and air speed effect much more on the Sgen, in a human body compared to the effects of mass exchange into andoutofthe body, internal heatproduction, cross-sectional area of human body, clothing, altitude, and relative humidity of the surrounding air. Among thesefactors entropy production due to heat tranfer over a human bodyplays a significant role in the total entropy generation rate.

Original languageEnglish
Pages (from-to)75-92
Number of pages18
JournalThermal Science
Volume11
Issue number1
DOIs
Publication statusPublished - 2007
Externally publishedYes

Keywords

  • Age
  • Entropy generation
  • Heat transfer
  • Human body surface area
  • Metabolism

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