The application of field synergy number in shell-and-tube heat exchanger optimization design

Guo, Jiangfeng; Xu, Mingtian; Cheng, Lin

doi:10.1016/j.apenergy.2009.01.013

Cited by 119 publications

(25 citation statements)

References 19 publications

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“…This issue has been demonstrated by numerical results [11]. From the analysis in [11] one can see that a little improvement in heat exchanger performance can lead to large gains in terms of energy saving and environmental protection. Hence, in heat exchanger design, reduction in total cost and improvement in heat exchanger performance should be treated equally.…”

Section: Discussionmentioning

confidence: 76%

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Entransy dissipation minimization for optimization of heat exchanger design

Guo

et al. 2011

Chin. Sci. Bull.

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In this paper, by taking the water-water balanced counterflow heat exchanger as an example, the entransy dissipation theory is applied to optimizing the design of heat exchangers. Under certain conditions, the optimal duct aspect ratio is determined analytically. When the heat transfer area or the duct volume is fixed, analytical expressions of the optimal mass velocity and the minimal entransy dissipation rate are obtained. These results show that to reduce the irreversible dissipation in heat exchangers, the heat exchange area should be enlarged as much as possible, while the mass velocity should be reduced as low as possible. entransy, heat exchanger, optimization design Citation:Li X F, Guo J F, Xu M T, et al. Entransy dissipation minimization for optimization of heat exchanger design.

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Section: Discussionmentioning

confidence: 76%

“…The first approach can reduce costs, but possibly at the expense of sacrificing heat exchanger performance [11]. As representative of the second approach, entropy generation minimization suffers from so-called "entropy generation paradox" [8,12].…”

mentioning

confidence: 99%

Entransy dissipation minimization for optimization of heat exchanger design

Guo

et al. 2011

Chin. Sci. Bull.

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“…where N is the number of the channels [28,31]. The Reynolds number (Re) is a dimensionless quantity that is used to predict similar flow patterns in different fluid flow situations, which can be obtained by Equation (24) [5]:…”

Section: Heat Exchanger Modelmentioning

confidence: 99%

“…where L, b are the channel width and channel spacing, respectively [28,31]. C is the wetted perimeter of the cross-section.…”

Section: Heat Exchanger Modelmentioning

confidence: 99%

Thermo-Economic Comparison and Parametric Optimizations among Two Compressed Air Energy Storage System Based on Kalina Cycle and ORC

Wang

Yao

et al. 2016

Energies

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Abstract:The compressed air energy storage (CAES) system, considered as one method for peaking shaving and load-levelling of the electricity system, has excellent characteristics of energy storage and utilization. However, due to the waste heat existing in compressed air during the charge stage and exhaust gas during the discharge stage, the efficient operation of the conventional CAES system has been greatly restricted. The Kalina cycle (KC) and organic Rankine cycle (ORC) have been proven to be two worthwhile technologies to fulfill the different residual heat recovery for energy systems. To capture and reuse the waste heat from the CAES system, two systems (the CAES system combined with KC and ORC, respectively) are proposed in this paper. The sensitivity analysis shows the effect of the compression ratio and the temperature of the exhaust on the system performance: the KC-CAES system can achieve more efficient operation than the ORC-CAES system under the same temperature of exhaust gas; meanwhile, the larger compression ratio can lead to the higher efficiency for the KC-CAES system than that of ORC-CAES with the constant temperature of the exhaust gas. In addition, the evolutionary multi-objective algorithm is conducted between the thermodynamic and economic performances to find the optimal parameters of the two systems. The optimum results indicate that the solutions with an exergy efficiency of around 59.74% and 53.56% are promising for KC-CAES and ORC-CAES system practical designs, respectively.

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“…They compared the HSA results with those obtained using GA, and revealed that the HSA can converge to an optimum solution with higher accuracy. Guo et al [16] applied the field synergy principle to the optimization design of an STHX with segmental baffles by using the GA to solve the heat exchanger optimization problems by using multiple design variables. The comparison with the conventional heat exchanger optimization design approach, with the total cost as the objective function, shows that the field synergy number maximization approach is more advantageous.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Shell and Helically-Coiled Tube Heat Exchangers with Various Dimple Arrangements in Condensers for Odor Control in a Pyrolysis System

Kim

Lee

et al. 2016

Energies

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Abstract:This study performed evaluations of the shell and helically-coiled tube heat exchangers with various dimple arrangements, that is, flat, inline, staggered, and bulged, at different Dean numbers (De) and inlet temperatures of a hot channel. Conjugated heat transfer was analyzed to evaluate the heat transfer performance of the exchangers through temperature difference between the inlet and outlet, Nusselt number inside the coiled tube, and pressure drop of the coiled tube by using 3-D Reynolds-averaged Navier-Stokes (RANS) equations with shear stress transport turbulence closure. A grid dependency test was performed to determine the optimal number of the grid system. The numerical results were validated using the experimental data, and showed good agreement. The inline and staggered arrangements show the highest temperature differences through all De. The staggered arrangement shows the best heat transfer performance, whereas the inline arrangement shows the second highest performance with all ranges of De and the hot channel's inlet temperature. The inline and staggered arrangements show the highest pressure drop among all inlet temperatures of the hot channel.

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The application of field synergy number in shell-and-tube heat exchanger optimization design

Cited by 119 publications

References 19 publications

Entransy dissipation minimization for optimization of heat exchanger design

Entransy dissipation minimization for optimization of heat exchanger design

Thermo-Economic Comparison and Parametric Optimizations among Two Compressed Air Energy Storage System Based on Kalina Cycle and ORC

Comparative Study of Shell and Helically-Coiled Tube Heat Exchangers with Various Dimple Arrangements in Condensers for Odor Control in a Pyrolysis System

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