Methods to Calculate Entropy Generation

Entropy generation, formulated by combining the first and second laws of thermodynamics with an appropriate thermodynamic potential, emerges as the difference between a phenomenological entropy function and a reversible entropy function. The phenomenological entropy function is evaluated over an irr...

Full description

Saved in:
Bibliographic Details
Published in:Entropy (Basel, Switzerland) Switzerland), 2024-03, Vol.26 (3), p.237
Main Authors: Osara, Jude A, Bryant, Michael D
Format: Article
Language:English
Subjects:
Batteries
Battery chargers
Energy conservation
Energy dissipation
Entropy
entropy generation
Equilibrium
Fatigue
Force and energy
Frictional wear
Heat
Laws, regulations and rules
Metal fatigue
Metals
Methods
non-equilibrium thermodynamics
Open systems
phenomenology
second law
thermodynamic potentials
Thermodynamics
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Entropy generation, formulated by combining the first and second laws of thermodynamics with an appropriate thermodynamic potential, emerges as the difference between a phenomenological entropy function and a reversible entropy function. The phenomenological entropy function is evaluated over an irreversible path through thermodynamic state space via real-time measurements of thermodynamic states. The reversible entropy function is calculated along an ideal reversible path through the same state space. Entropy generation models for various classes of systems-thermal, externally loaded, internally reactive, open and closed-are developed via selection of suitable thermodynamic potentials. Here we simplify thermodynamic principles to specify convenient and consistently accurate system governing equations and characterization models. The formulations introduce a new and universal Phenomenological Entropy Generation (PEG) theorem. The systems and methods presented-and demonstrated on frictional wear, grease degradation, battery charging and discharging, metal fatigue and pump flow-can be used for design, analysis, and support of diagnostic monitoring and optimization.
ISSN:1099-4300
1099-4300
DOI:10.3390/e26030237