Multi-objective optimization of shell and tube heat exchangers

Sanaye, Sepehr; Hajabdollahi, Hassan

doi:10.1016/j.applthermaleng.2010.04.018

Cited by 169 publications

(59 citation statements)

References 18 publications

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“…The total operating cost is dependent on the pumping power to overcome the pressure drop from both shell and tube side flow [12,18]:…”

Section: Objective Functionsmentioning

confidence: 99%

“…Their Pareto curve indicates the contradictory nature of the two objective functions clearly. Sanaye and Haj Abdollahi [12] used a two-objective optimization genetic algorithm to obtain minimum total cost and maximum heat transfer rate. They introduce a suitable limit on the Pareto curve from cost and efficiency points of view, to assist in the heat exchanger design.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of a Finned Shell and Tube Heat Exchanger Using a Multi-Objective Optimization Genetic Algorithm

2015

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Abstract:Heat transfer rate and cost significantly affect designs of shell and tube heat exchangers. From the viewpoint of engineering, an optimum design is obtained via maximum heat transfer rate and minimum cost. Here, an analysis of a radial, finned, shell and tube heat exchanger is carried out, considering nine design parameters: tube arrangement, tube diameter, tube pitch, tube length, number of tubes, fin height, fin thickness, baffle spacing ratio and number of fins per unit length of tube. The "Delaware modified" technique is used to determine heat transfer coefficients and the shell-side pressure drop. In this technique, the baffle cut is 20 percent and the baffle ratio limits range from 0.2 to 0.4. The optimization of the objective functions (maximum heat transfer rate and minimum total cost) is performed using a non-dominated sorting genetic algorithm (NSGA-II), and compared against a one-objective algorithm, to find the best solutions. The results are depicted as a set of solutions on a Pareto front, and show that the heat transfer rate ranges from 3517 to 7075 kW. Also, the minimum and maximum objective functions are specified, allowing the designer to select the best points among these solutions based on requirements. Additionally, variations of shell-side pressure drop with total cost are depicted, and indicate that the pressure drop ranges from 3.8 to 46.7 kPa. OPEN ACCESSSustainability 2015, 7 11680

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“…The total operating cost is dependent on the pumping power to overcome the pressure drop from both shell and tube side flow [12,18]:…”

Section: Objective Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of a Finned Shell and Tube Heat Exchanger Using a Multi-Objective Optimization Genetic Algorithm

2015

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“…While a smaller refractory inner diameter or greater tube diameter causes greater heat transfer from the helium gas (and thus increased methane conversion) when varied independently, shrinking the refractory inner diameter or increasing the tube diameter requires squeezing the tubes closer together, which quickly becomes impractical without removing some of the tubes. There is a lower bound on tube pitch ratio (C/D) of 1.25 for the triangular and square tube arrangements [32,33] to allow mechanical cleaning of the tubes, and for a clear line-of-sight between the hot helium gas (for radiative heat transfer) and the tube surface, and for adequate space for gas to flow between the tubes without causing a significant pressure drop. The general conclusion here from an optimal design perspective is somewhat obvious in that the shell size and tube spacing should not be bigger than it needs to be.…”

Section: Sensitivity Analysismentioning

confidence: 99%

Modeling and simulation of an integrated steam reforming and nuclear heat system

Hoseinzade

Adams

2017

International Journal of Hydrogen Energy

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The following article is a "pre-print" of an article accepted for publication in an Elsevier journal.Hoseinzade L, Adams TA II. Modeling and simulation of an integrated steam reforming and nuclear heat system. International Journal of Hydrogen Energy 42 (2017) pp. 25048-25062The pre-print is not the final version of the article. It is the unformatted version which was submitted for peer review, but does not contain any changes made as the result of reviewer feedback or any editorial changes. Therefore, there may be differences in substance between this version and the final version of record.The final, official version of the article can be downloaded from the journal's website via this DOI link when it becomes available (subscription or purchase may be required): AbstractIn this study, a dynamic and two-dimensional model for a steam methane reforming process integrated with nuclear heat production is developed. The model is based on first principles and considers the conservation of mass, momentum and energy within the system. The model is multiscale, considering both bulk gas effects as well as spatial differences within the catalyst particles. Very few model parameters need to be fit based on the design specifications reported in the literature. The resulting model fits the reported design conditions of two separate pilot-scale studies (ranging from 0.4 to 10 MW heat transfer duty). A sensitivity analysis indicated that disturbances in the helium feed conditions significantly affect the system, but the overall system performance only changes slightly even for the large changes in the value of the most uncertain parameters.

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“…Pressure losses increased by 44.6-48.8 % with the solar installation. Sanaye and Hajabdollahi [10] used a first thermal model which is the eeNTU method which is applicable for optimal design of a shell and tube heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Study of the fouling deposit in the heat exchangers of Algiers refinery

2014

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The calculation of the calender-and-tube heat exchanger is based on empirical models validated on the laboratory scale. However, when doing an extrapolation at industrial scale, errors become significant because of the non-linearities of the thermophysical properties and the transfer coefficients along the heat exchanger. For that, a follow-up on the fouling resistance in heat exchangers of tube-calender type in Algiers' refinery is presented in this study. These exchangers are used to preheat the crude oil before its passage to the atmospheric column. The results obtained from the two cells of exchangers, which were studied, showed that the resistance and the deposit fouling increases with time following an exponential curve with the existence of the fluctuations caused by the instability of the flow. Bad cleaning of the exchangers involved the absence of an induction time, and consequently, caused high values of the resistance and the deposit fouling during a relatively short time.

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Multi-objective optimization of shell and tube heat exchangers

Cited by 169 publications

References 18 publications

Optimization of a Finned Shell and Tube Heat Exchanger Using a Multi-Objective Optimization Genetic Algorithm

Optimization of a Finned Shell and Tube Heat Exchanger Using a Multi-Objective Optimization Genetic Algorithm

Modeling and simulation of an integrated steam reforming and nuclear heat system

Study of the fouling deposit in the heat exchangers of Algiers refinery

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