CFD applications in various heat exchangers design: A review

Bhutta, Muhammad Mahmood Aslam; Hayat, Nasir; Bashir, Muhammad Hassan; Khan, Ahmer Rais; Ahmad, Kanwar Naveed; Khan, Sarfaraz

doi:10.1016/j.applthermaleng.2011.09.001

Cited by 404 publications

(65 citation statements)

References 63 publications

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“…The number of total elements was about 6.0 million and the mesh should be well designed to resolve the important flow features which are dependent upon flow condition parameters. In numerical calculations, mesh generation is very crucial for getting accurate predicted results and reducing the computation time [9,12,14,18,19]. The mesh structure of the surfaces of the computational domain and the section view of this domain are shown in Figure 6.…”

Section: Cad Model Of the Heat Exchangermentioning

confidence: 99%

“…For shell side Reynolds number we used Equation (20) where do is the outer diameter of a one tube and As is the crossflow bundle area described in Equation (14). The Reynolds number is computed to be about 2773, thus the shell side flow is assumed as turbulent:…”

Section: Shell Side Heat Transfer Coefficient and Pressure Drop Usingmentioning

confidence: 99%

“…The CFD method with these common correlations can be utilized to get the appropriate flow and heat transfer characteristics taking into account the desired heat transfer rate and pressure drop. The CFD method can be used both in the rating and iteratively in the sizing of heat exchangers [14]. On the other hand, to get a successful CFD simulation for a detailed heat exchanger model, in the numerical computations, we chose a small shell and tube heat exchanger to evaluate the effect of variable baffle spacing on the heat transfer coefficient and also pressure drop that can be compared with the correlation-based ones.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of the Effect of Variable Baffle Spacing on the Thermal Performance of a Shell and Tube Heat Exchanger

Bayram

Sevilgen

2017

Energies

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Abstract:In this present study, numerical and theoretical analysis were both used to investigate the effect of the variable baffle spacing on the thermal characteristics of a small shell and tube heat exchanger. The numerical study was performed by using a three dimensional computational fluid dynamics (CFD) method and the computations were performed under steady-state conditions. We employed five different cases where the first had equal baffle spacing and the others had variable ones considering different configurations for balancing the pressure drop on the shell side. Theoretical calculations were run using the Bell-Delaware and Kern methods which are the most commonly used methods in the available literature. We show that the thermal performance of a shell and tube heat exchanger can be improved by evaluating together the results of the CFD and Bell-Delaware methods. From the numerical results, we can say that variable spacing with centered baffle spacing scheme can be proposed as an alternative shell side construction layout compared to an equal baffle spacing scheme. The numerical results were in good agreement with the theoretical data in the available literature.

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Section: Cad Model Of the Heat Exchangermentioning

confidence: 99%

Section: Shell Side Heat Transfer Coefficient and Pressure Drop Usingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of the Effect of Variable Baffle Spacing on the Thermal Performance of a Shell and Tube Heat Exchanger

Bayram

Sevilgen

2017

Energies

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“…El avance en los equipos de cómputo actuales hace que sea posible la simulación numérica de un intercambiador de calor en su totalidad (Bhutta et al, 2012). Apoyándose en ello, diversos autores han realizado estimaciones del coeficiente de transferencia de calor en intercambiadores con bafles verticales y sistemas con bafles helicoidales a través de simulaciones (Zhang, et al, 2009;You et al, 2012;Xiao et al, 2013;Chen et al, 2013;Yang, et al, 2014).…”

Section: Introductionunclassified

Determinación Computacional del Coeficiente de Transferencia de Calor en Calentadores Eléctricos de Flujo Continuo, mediante Dinámica de Fluidos Computacional

Márquez-Baños

Valencia-López²,

García-Aranda

et al. 2016

Inf. tecnol.

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ResumenSe realizó la estimación del coeficiente de transferencia de calor mediante herramientas de Dinámica de Fluidos Computacional (CFD) para cuatro configuraciones de calentadores eléctricos de 5,08 cm de diámetro: a) tubo simple, b) bafles verticales, c) bafle helicoidal, y d) bafle helicoidal, con variación de torsión. El modelo computacional se planteó empleando el modelo κ-ε para representar los fenómenos de turbulencia acoplado con la ecuación del balance de calor. Los coeficientes de transferencia de calor obtenidos mostraron similitud entre las configuraciones a, c y d. La configuración b presentó un aumento significativo debido a la turbulencia generada dentro de la sección interna en los bafles, y mostró también una elevada caída de presión. Palabras clave: calentador eléctrico; coeficiente de transferencia de calor; dinámica de fluidos computacional; elemento finito Computational Determination of Heat Transfer Coefficient in Continuous Flow Electrical Heaters, using Computational Fluid Dynamics AbstractThe estimation of the heat transfer coefficient using tools of Computational Fluid Dynamics (CFD) for four configurations of electric heaters of 5.08 cm in diameter has been done: a) single pipe, b) vertical baffles, c) helical baffle, d) helical baffle with torsion variation. The computational model is established using the κ-ε model to represent the phenomena of turbulence coupled with the heat balance equation. The heat transfer coefficients obtained by this method showed similarity between configurations a, c and d. The configuration b presented a significant increase due to the turbulence generated within the internal section in the enclosures, and showed a high pressure drop.

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“…The reason is that the effect of LHC is ignored in both original LMTD method and NTU method at the beginning. The computational fluid dynamics (CFD) simulation of heat exchanger is helpful for studying thermal-hydraulic performance [2]. LHC in the wall is usually neglected in the CFD simulations even though its effect is significant.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of Small-Scale Longitudinal Heat Conduction in Plate Heat Exchangers

Borjigin

Zeng

et al. 2018

Energies

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Abstract:Longitudinal heat conduction has a significant effect on the heat transfer performance of plate heat exchangers, but longitudinal heat conduction is usually neglected in numerical studies and the thermal design of a heat exchanger. In this paper, heat transfer models with and without longitudinal heat conduction are proposed to analyze the effect of small-scale longitudinal heat conduction in a plate heat exchanger. The performance of small-scale longitudinal heat conduction is illustrated by temperature and heat flux contours in the heat transfer models with and without longitudinal heat conduction. The results show that small-scale longitudinal heat conduction occurs in the plate and a more uniform temperature profile of the plate is obtained due to small-scale longitudinal heat conduction. In balanced flow, the contributions of longitudinal heat conduction for counter-flow, cross-flow and parallel-flow plate heat exchangers are −3.15%, −0.09% and 0, respectively, whereas, for the respective unbalanced flows they are evaluated to be −1.73%, 0.53% and 0.05%, respectively. Moreover, it is observed that small-scale longitudinal heat conduction in plates is influenced by the thermal conductivity of the plate. The higher the thermal conductivity, the larger is the reduction of thermal performance. The contribution of longitudinal heat conduction varies from −0.54% to −4.01%.

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CFD applications in various heat exchangers design: A review

Cited by 404 publications

References 63 publications

Numerical Investigation of the Effect of Variable Baffle Spacing on the Thermal Performance of a Shell and Tube Heat Exchanger

Numerical Investigation of the Effect of Variable Baffle Spacing on the Thermal Performance of a Shell and Tube Heat Exchanger

Determinación Computacional del Coeficiente de Transferencia de Calor en Calentadores Eléctricos de Flujo Continuo, mediante Dinámica de Fluidos Computacional

A Numerical Study of Small-Scale Longitudinal Heat Conduction in Plate Heat Exchangers

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