Entransy analysis of reversible thermodynamic cycles based on the conservation of entransy equation and its application

Guo, Zeng-Yuan; Zhao, Tian; Xue, Ti-Wei

doi:10.1360/n972018-00865

Cited by 7 publications

(2 citation statements)

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“…Thus, the equilibrium concept existing in thermodynamics does not imply the possibility of reversible processes in nonequilibrium systems. At the same time, in thermodynamics, there are cases of reversible processes, for example, reversible heat transfer with a finite temperature difference between bodies using an ideal heat engine, gas flow in an ideal turbine or compressor with a final pressure drop in a stream, etc (Nili-Ahmadabadi et al, 2018; Guo et al, 2019) In connection with the difficulties noted above, which arise in presenting the second law on the basis of the existing concepts of equilibrium and reversibility, the postulate "on the existence and change of nonequilibrium" is introduced into thermodynamics.…”

Section: Resultsmentioning

confidence: 99%

Statement of the Second Law of Thermodynamics on the Basis of the Postulate of Nonequilibrium

Ryndin¹

2019

PTQ

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Most physical laws are quantitative expressions of the philosophical laws of the conservation of matter and its properties of motion. The first law of thermodynamics (FLT) is an analytical expression of the law of conservation of motion when its shape changes. As for the second law of thermodynamics (SLT), it has not yet been clarified which property of matter does not change during the course of reversible processes and changes during the course of irreversible processes in an isolated system (IS). Hence, a large number of the SLT statements and an abundance of material to clarify these formulations. The author of the SLT is based on the “postulate of nonequilibrium”, according to which there is an objective property of matter - “nonequilibrium”, which characterizes the unequal distribution of matter and movement in space. All processes (reversible and irreversible) can proceed only in nonequilibrium systems. This leads to the only formulation of the second law of thermodynamics: when the reversible (ideal) processes occur in an isolated system, the nonequilibrium is preserved, and with the occurrence of irreversible (real) processes – decreases. When the system reaches an equilibrium state, the nonequilibrium disappears, and all processes cease. As a quantitative measure of the nonequilibrium of the system, we consider the maximum work that can be done when a nonequilibrium system transitions to an equilibrium state. The following quantities are used to calculate this work: “potential difference”, “entropy difference”, change in exergy. All these values decrease in the course of real (irreversible) processes in the isolated system and do not change in the course of reversible processes. As a result, a generalized expression of the SLT through the quantitative characteristics of the nonequilibrium of the system in the form of an inequality, which includes R. Claudius’s inequality for changing the entropy of an isolated system, is obtained.

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Section: Resultsmentioning

confidence: 99%

Statement of the Second Law of Thermodynamics on the Basis of the Postulate of Nonequilibrium

Ryndin¹

2019

PTQ

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“…不需要外功输入, 将相同数量的热量从低温热源转移到高温热源的过程可以通过联合循环来实现 [14,15] . Maxwell's demon challenged the second law of thermodynamics, thereby attracting much research attention for over a century.…”

Section: 热质能--一种新的能量mentioning

confidence: 99%

Maxwell’s demon and information energy

Nie¹,

Guo²

2020

Chin. Sci. Bull.

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Entransy-Based Depletion Index and Its Application for Assessing Efficiency and Sustainability

Rodríguez

Rodríguez²,

Fontes³

2022

Arab J Sci Eng

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Entransy analysis of reversible thermodynamic cycles based on the conservation of entransy equation and its application

Cited by 7 publications

References 3 publications

Statement of the Second Law of Thermodynamics on the Basis of the Postulate of Nonequilibrium

Statement of the Second Law of Thermodynamics on the Basis of the Postulate of Nonequilibrium

Maxwell’s demon and information energy

Entransy-Based Depletion Index and Its Application for Assessing Efficiency and Sustainability

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Entransy analysis of reversible thermodynamic cycles based on the conservation of entransy equation and its application

Cited by 7 publications

References 3 publications

Statement of the Second Law of Thermodynamics on the Basis of the Postulate of Nonequilibrium

Statement of the Second Law of Thermodynamics on the Basis of the Postulate of Nonequilibrium

Maxwell&rsquo;s demon and information energy

Entransy-Based Depletion Index and Its Application for Assessing Efficiency and Sustainability

Contact Info

Product

Resources

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Maxwell’s demon and information energy