Entransy Dissipation Theory and Its Application in Heat Transfer

Xu, Mingtian

doi:10.5772/19573

Cited by 7 publications

(9 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and explained as "the quantity which represents the heat transfer ability of a system" [10][11][12]. In fact, the larger the amount of heat Q 1 and the temperature difference between the hot and cold reservoirs, the greater the entransy obtained by the heat engine in the Carnot cycle.…”

Section: Entransy Definitionsmentioning

confidence: 99%

“…Starting from the relation (1), by using an algebraic approach, the following relation was obtained [10][11][12]:…”

Section: Entransy Definitionsmentioning

confidence: 99%

“…To do so, Section 2 will summarize the entransy approach [10][11][12][13][14][15][16][17][18][19][20][21][22][23], and Section 3 will develop the discussion of entransy, pointing out the crucial thermodynamic difficulties related to its definition and use.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Entropy versus entransy

Grazzini

Borchiellini

Lucia

2013

Journal of Non-Equilibrium Thermodynamics

View full text Add to dashboard Cite

Entransy is a function recently introduced in thermodynamics. This function is analyzed critically in relation to the classical thermodynamic approach in order to understand its physical fundamentals. The crucial problem is that thermodynamic analysis shows that entransy does not contain any new information in comparison with a classical thermodynamic analysis of systems. Furthermore, entransy dissipation analysis is a duplicate of entropy generation analysis.

show abstract

Section: Entransy Definitionsmentioning

confidence: 99%

“…Starting from the relation (1), by using an algebraic approach, the following relation was obtained [10][11][12]:…”

Section: Entransy Definitionsmentioning

confidence: 99%

See 1 more Smart Citation

Entropy versus entransy

Grazzini

Borchiellini

Lucia

2013

Journal of Non-Equilibrium Thermodynamics

View full text Add to dashboard Cite

show abstract

“…They claim that an important quantity within this concept is missing, something they call "entransy," see Ref. [2] as an example of many of their publications [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Recently, this entransy has been deeply analysed in Refs.…”

Section: Introductionmentioning

confidence: 94%

Do We Really Need “Entransy”? A Critical Assessment of a New Quantity in Heat Transfer Analysis

Herwig

2014

Journal of Heat Transfer

View full text Add to dashboard Cite

Recently, a group of scientists introduced a new quantity for the analysis of heat transfer problems. They called it entransy since according to their understanding it is both, an indication of the nature of energy as well as that of the heat transfer ability. This concept is critically assessed on the background of two questions: Is entransy as an extension of the well established theory of heat transfer consistent with this classical approach? And: Is there a real need for the extension of the classical theory by introducing entransy as a quantity that was missing in the past?

show abstract

“…A series of in-depth researches have been carried out in various directions, such as heat conduction, heat convection and heat exchanger, mass transfer, complex transfer process, phase change and radiative heat transfer. According to a incomplete statistics, more than 100 related literatures had been published until August 2011, including monographs and corpuses [1,8], review articles [9][10][11] and doctoral dissertations [12][13][14][15][16][17][18][19][20][21][22].…”

mentioning

confidence: 99%

Progress in entransy theory and its applications

Chen

2012

Chin. Sci. Bull.

115

View full text Add to dashboard Cite

The entransy and entransy dissipation extremum principle proposed have opened up a new direction for the heat transfer optimization. The emergence and development of entransy theory are reviewed. Entransy theory and its applications are summarized from several aspects, such as heat conduction, heat convective, heat radiation, heat exchanger design and mass transfer, etc. The emphases are focused on four aspects, i.e., the comparison between entropy generation rate and entransy dissipation rate, the combination of entransy dissipation extreme principle with finite time thermodynamics, the combination of entransy dissipation extreme principle with the heat conduction constructal theory, and the combination of entransy dissipation extreme principle with the heat convective constructal theory. The scientific features of entransy theory are emphasized. Influenced by oil crisis in the 1970's directly, the heat transfer enhancement was world-widely paid attention by the scientific community, and was quickly developed into one of very important branches in thermal science and technology fields. With the progress of social development ideas, such as sustainable development, low-carbon technology and low-carbon economy, the concept of heat transfer enhancement has developed into a broader scope concept of heat transfer optimization [1]. In the past 30 years, the basic theory of heat transfer optimization has been made considerable progresses, and finite-time thermodynamics, field synergy principle, constructal theory as well as entransy theory are the representative achievements. The emergences of these theories promoted the developments of thermodynamics and heat transfer. Finite-time thermodynamics, which combined thermodynamics, heat transfer and fluid mechanics, provided a theoretical fundament for performance optimizations of practical processes and devices with the constraints of a finite size and finite time. Field synergy principle unified the essential physical understandings of convective heat transfer and heat transfer enhancement phenomena, and provided a theoretical fundament for the development of heat transfer enhancement technology to achieve better energy saving effects. Constructal theory, which was called the thermodynamics of non-equilibrium system with configuration in the field of thermal science, provided a theoretical fundament for the unified descriptions of the generation of flow structures in natural organization and the designs of various flow structures. Fourier's law of heat conduction, Newton's law of cooling and Stephen-Boltzmann law of blackbody radiation only gave the concept of heat transfer rate, while the concepts of entransy and entransy dissipation lay the foundation of defining the concept of heat transfer efficiency which did not appear in the heat transfer theory before. Entransy theory provided a new theoretical fundament for heat transfer optimization, which is different from that of the entropy generation minimization.

show abstract

Entransy Dissipation Theory and Its Application in Heat Transfer

Cited by 7 publications

References 35 publications

Entropy versus entransy

Entropy versus entransy

Do We Really Need “Entransy”? A Critical Assessment of a New Quantity in Heat Transfer Analysis

Progress in entransy theory and its applications

Contact Info

Product

Resources

About