The field synergy (coordination) principle and its applications in enhancing single phase convective heat transfer

Zhang, Guo; Tao, Wen‐Quan; Shah, R. K.

doi:10.1016/j.ijheatmasstransfer.2004.11.007

Cited by 477 publications

(141 citation statements)

References 12 publications

Supporting

Mentioning

138

Contrasting

Order By: Relevance

“…The field synergy principle of boundary-layer flow has been systematically expounded by Guo and Tao et al [14,15]. It shows that the convective heat transfer not only depends on the thermal physics properties, the temperature difference and the fluid flow velocity, but also depends on the angle between the velocity vector and the temperature gradient.…”

Section: Field Synergy Analysismentioning

confidence: 99%

Field synergy analysis of six starts spiral corrugated tube under high Reynolds number

Jin

Liu

Qian

et al. 2016

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract. Coaxial heat exchanger is widely used in air conditioning, refrigeration etc., due to its highly efficient heat transfer performance. Spiral corrugated tube plays an important role in coaxial heat exchanger. In this paper, the numerical model of a six starts spiral corrugated tube and a smooth tube with the same size are developed. The temperature field and the velocity field of their streamline and longitudinal vortex are investigated respectively. Then, their heat transfer and pressure drop performance inside the spiral corrugated tube under different high Reynolds number is investigated by compared their Nusselt number and friction coefficient. Meanwhile, their field synergy performances with their field synergy angles are presented. The result shows that the Nusselt number and friction coefficient of spiral corrugated tube are always larger than the smooth tube, and with the increasing of Reynolds number, the heat transfer performance of SCT becomes better than smooth tube, however, the friction coefficient ratio also increases synchronously. And in spiral corrugated tube, the field synergy angel is smaller than in the smooth tube. This work can be referred by some who are also dealing with spiral corrugated tube and its heat performance research.

show abstract

Section: Field Synergy Analysismentioning

confidence: 99%

Field synergy analysis of six starts spiral corrugated tube under high Reynolds number

Jin

Liu

Qian

et al. 2016

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…The existence of FFAVDs can be scientifically explained by the principle of field synergy [14][15][16]. In [16], Guo introduced a unified principle, the so-called field synergy (coordination) principle.…”

Section: Identification Of a Favorable Face-air Velocity Distributionmentioning

confidence: 99%

“…In [16], Guo introduced a unified principle, the so-called field synergy (coordination) principle. It may be employed to generally describe the performance of different types of convection heat transfer and consequently guide the enhancement of convection heat transfer.…”

Section: Identification Of a Favorable Face-air Velocity Distributionmentioning

confidence: 99%

The Effect of Face-Air Velocity Distribution on Heat Transfer Performance of Air-Cooled Condensers

Zhang¹,

Yang²

2015

IJHT

View full text Add to dashboard Cite

The purpose of this study is to determine the influence of face-air velocity distribution of finned tube bundles on the thermal-performance of power plant Air-Cooled Condensers (ACCs) by experimental method and to explore Favorable Face-Air Velocity Distributions (FFAVDs) of the ambient cooling air inside the air-cooled cells by Computational Fluid Dynamics (CFD) method. FFAVD is a face-air velocity distribution favorable for thermo-performance of power plant ACCs. Based on experiments on a specially-constructed wind tunnel test-bed located on-site of a 1000-MW ultra-supercritical direct air-cooled power plant, it was found that face-air velocity distribution of ambient cooling air of finned tube bundles used in ACCs notably affects their thermo-performance, and FFAVDs can be determined. One type of FFAVD tended to increase in the retrograde direction of tube-side turbine-exhaust-condensate flow. The face-air velocity distributions of ambient cooling air that increase in the direction of tube-side turbine-exhaust-condensate flow have an adverse effect on the thermo-performance of power plant ACCs. The existence of FFAVDs can be scientifically explained by the principle of field synergy. Experiments on an A-frame cell on the ACC employed in the 1000 MW ultra-supercritical direct air-cooled power plant showed that the face-air velocity distribution in an A-frame ACC cell has the opposite trend of an FFAVD. Therefore, one type of distributing net with the characteristics of an FFAVD is introduced. The favorable characteristics of the wind distributing net have been verified based on modelling and numerical calculation.

show abstract

“…Nowadays, the heat transfer optimization theory involves constructal theory [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], entropy generation minimization theory [11,14,17,18] and the field synergy principle [19][20][21][22][23][24][25][26]. Since Bejan studied the development of the street network [1], put forward the constructal theory and applied it to optimization problems involving heat conduction [3], constructal theory has been developing rapidly in simply flow systems [27][28][29][30][31][32][33][34][35][36][37].…”

mentioning

confidence: 99%

Constructal entransy dissipation rate minimization for a heat generating volume cooled by forced convection

2011

View full text Add to dashboard Cite

The geometry of a heat generating volume cooled by forced convection is optimized by applying the entransy dissipation extremum principle and constructal theory, while the optimal spacing between the adjacent tubes and the optimal diameter of each tube are obtained based on entransy dissipation rate minimization. The results of this work show that the optimal constructs based on entransy dissipation rate minimization and maximum temperature difference minimization, respectively, are clearly different. For the former, the porosity of the volume of channels allocated to the heat generating volume is 1/2; while for the latter, the larger the porosity is, the better the performance will be. The optimal construct of the former greatly decreases the mean thermal resistance and improves the global heat transfer performance of the system compared with the optimal construct of the latter. This is identical to the essential requirement of the entransy dissipation extremum principle that the required heat transfer temperature difference is minimal with the same heat transfer rate (the given amount of heat generated in the heat generating volume) based on the entransy dissipation extremum principle. entransy dissipation extremum principle, constructal theory, forced convection, entransy dissipation rate, generalized thermodynamic optimization

show abstract

The field synergy (coordination) principle and its applications in enhancing single phase convective heat transfer

Cited by 477 publications

References 12 publications

Field synergy analysis of six starts spiral corrugated tube under high Reynolds number

Field synergy analysis of six starts spiral corrugated tube under high Reynolds number

The Effect of Face-Air Velocity Distribution on Heat Transfer Performance of Air-Cooled Condensers

Constructal entransy dissipation rate minimization for a heat generating volume cooled by forced convection

Contact Info

Product

Resources

About