Optimization of flue gas turbulent heat transfer with condensation in a tube

Song, Weiming; Jiang, Meng; Li, Zhixin

doi:10.1007/s11434-011-4533-9

Cited by 7 publications

(3 citation statements)

References 20 publications

(23 reference statements)

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“…(49) and (50) show that the maximum thermal resistance and entransy dissipation rate approach the minimum values as n 1 , n 1 a → ∞, that is, when n 1 , n 1 a → ∞…”

Section: Second Order Constructmentioning

confidence: 99%

“…To denote the global heat transfer ability, a new physical quantity "entransy" was firstly defined by Guo et al [37], and based on this quantity, the entransy dissipation extremum principle [37][38][39] was proposed, which can be used for guiding heat transfer optimization. Since it was proposed, scholars have shown great interests in it, and it has been applied to the optimization of heat conduction [40][41][42][43][44][45][46], heat convection [47][48][49][50], radiative heat transfer [51,52], heat exchanger [53][54][55][56] and even the optimization of mass transfer process [57,58]. Wei et al [41][42][43][44] firstly introduced the entransy dissipation extremum principle to constructal tree-like network design, and obtained a different configuration whose mean temperature is lower.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of constructal tree-like network for “volume-point” heat conduction with variable cross-section conducting path and without the premise of optimal last-order construct

Chen

Xie

et al. 2015

International Communications in Heat and Mass Transfer

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“…(49) and (50) show that the maximum thermal resistance and entransy dissipation rate approach the minimum values as n 1 , n 1 a → ∞, that is, when n 1 , n 1 a → ∞…”

Section: Second Order Constructmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of constructal tree-like network for “volume-point” heat conduction with variable cross-section conducting path and without the premise of optimal last-order construct

Chen

Xie

et al. 2015

International Communications in Heat and Mass Transfer

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“…Xu et al [46] discussed the problem of entransy dissipation rate in convective heat transfer. Song et al [47,48] discussed the optimization problems of convective heat transfer with flue gas condensation in rectangular passage and pipe.…”

Section: Heat Convectionmentioning

confidence: 99%

Progress in entransy theory and its applications

Chen

2012

Chin. Sci. Bull.

115

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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.

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