Open AccessOn some inconsistences between two accepted approaches to treat reversible thermal cycles
Author(s) -
A. Ocampo-García,
M. A. BarrancoJiménez,
F. AnguloBrown
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1221/1/012045
Subject(s) - thermodynamics , ideal gas , thermal , imperfect , formalism (music) , work (physics) , thermal engineering , thermal physics , theoretical physics , statistical physics , physics , mathematics , non equilibrium thermodynamics , philosophy , art , musical , linguistics , visual arts
In many engineering thermodynamics textbooks, for solving reversible thermal cycles such as Otto and Joule-Bryton ones, commonly a kind of hybrid approach is used. On one hand an ideal gas is used as working fluid, but on the other hand, some thermal properties as heat capacities and their ratio are taken from data tables corresponding to imperfect gases. This approach leads to contradictions with the true reversible formalism. In this work, we analyse two examples treated in some thermodynamics textbooks where we show some inconsistences in the solutions of the problems.