Thermal optimization of shell and tube heat exchanger using porous baffles

Mohammadi, Mohammad; Abbasi, Hamid Reza; Yavarinasab, Adel; Pourrahmani, Hossein

doi:10.1016/j.applthermaleng.2020.115005

Cited by 86 publications

(16 citation statements)

References 47 publications

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“…Like jet impingement, ribs, and other heat transfer enhancement techniques, insertion of baffles in heat transfer devices is popular to promote better mixing of the coolant and increase cooling performance [2]. Applications of the inclined baffles may be in the large land based modern gas turbines, in which it has become a growing trend to increase the temperature of the combustion product to increase the specific thrust and to reduce the specific fuel consumption.…”

Section: Fig 1 Schematic Diagrams Of the Main Flow Manner[9]mentioning

confidence: 99%

Review on the Performance Evaluation of Thermal Exchangers using Different Baffle Designs

Mishra¹,

Daniel²,

Asthana³

2021

IJOSCIENCE

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The thermal performance of a heat exchanger depends upon various parameters like inlet temperature of hot fluid, type of hot fluid, type of cold fluid, the shape of baffles, the material of baffles, baffles angle, and property of ribs. Basically fluid flow and heat transfer characteristics largely depend upon the Reynolds number (Re). Reynolds number is basically the ratio of inertia force to viscous force. Re is only the factor by which we can decide whether the fluid is laminar or turbulent in shell and tube type of heat exchanger. The heat exchanger is an adiabatic device in which heat is transferred from one fluid to another fluid across a plate surface. In this paper, we have introduced some special types of triangular baffles with rectangular channels. The purpose of this apparatus is to enhance the performance of the heat exchanger. Heat exchangers, nowadays, are one of the most important heat & mass transfer apparatuses in industries like oil refining; heat treatment plants, electric power generation, etc. are long service life.

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Section: Fig 1 Schematic Diagrams Of the Main Flow Manner[9]mentioning

confidence: 99%

Review on the Performance Evaluation of Thermal Exchangers using Different Baffle Designs

Mishra¹,

Daniel²,

Asthana³

2021

IJOSCIENCE

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“…Until recently, industrial heat exchangers have been designed with the assistance of computer-aided design (CAD) based geometry optimization software [18,14], which are compatible with all the stages of the design workflow from physical simulations relying on commercial codes to the automated manufacturing process. Unfortunately, these methods heavily rely on the choice of a parameterization for the geometry of the optimized shape, so that they usually yield very small modifications of the initially proposed geometry [49,23,38,36,69]. These already allow for substantial gains in performance in most industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Body-fitted topology optimization of 2D and 3D fluid-to-fluid heat exchangers

Feppon

Allaire

Dapogny

et al. 2021

Computer Methods in Applied Mechanics and Engineering

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We present a topology optimization approach for the design of fluid-to-fluid heat exchangers which rests on an explicit meshed discretization of the phases at stake, at every iteration of the optimization process. The considered physical situations involve a weak coupling between the Navier-Stokes equations for the velocity and the pressure in the fluid, and the convection-diffusion equation for the temperature field. The proposed framework combines several recent techniques from the field of shape and topology optimization, and notably a level-set based mesh evolution algorithm for tracking shapes and their deformations, an efficient optimization algorithm for constrained shape optimization problems, and a numerical method to handle a wide variety of geometric constraints such as thickness constraints and non-penetration constraints. Our strategy is applied to the optimization of various types of heat exchangers. At first, we consider a simplified 2D cross-flow model where the optimized boundary is the section of the hot fluid phase flowing in the transverse direction, which is naturally composed of multiple holes. A minimum thickness constraint is imposed on the cross-section so as to account for manufacturing and maximum pressure drop constraints. In a second part, we optimize the design of 2D and 3D heat exchangers composed of two types of fluid channels (hot and cold), which are separated by a solid body. A non-mixing constraint between the fluid components containing the hot and cold phases is enforced by prescribing a minimum distance between them. Numerical results are presented on a variety of test cases, demonstrating the efficiency of our approach in generating new, realistic, and unconventional heat exchanger designs.

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“…One of the main conclusions drawn from their work is that the effect of a hybrid baffle configuration on U, ε, NTU and η is more pronounced than the other three types, This also includes that the flow side flow resistance for the hybrid baffle configuration is higher than the other configurations and that the hybrid baffle configuration is the best among other configurations, regardless of whether it has a negative impact on the pressure drop. Mohammadi et al [10] studied six porous baffles with the same area in their studies to investigate the performance of the shell and tube heat exchanger. In this regard, they considered three values for permeability (10 -9 m 2 , 10 -12 m 2 and 10-15 m 2 ), three values for porosity (0.2, 0.5 and 0.8) and three values for baffle cutting (25%, 35%, 50%).…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Effects of Baffles in a Shell and Tube Heat Exchanger

Pamuk¹

2021

World Congress on Mechanical, Chemical, and Material Engineering

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This numerical study examines the effects of the baffles added to the fluid (oil) flow path to be cooled in a shell and tube heat exchanger. The heat transfer rate in the case without baffles is compared to the cases where the baffles are added in the oil flow path. The comparison shows a remarkable increase in heat transfer, but on the other hand leads to higher pumping costs due to a higher pressure loss. CFD simulation can optimize the design of shell and tube heat exchangers by changing the number, size and position of the baffles. The CFD simulation package used here is the commercial software ANSYS Fluent © . The CFD model contains all details of the geometric and material properties, so that the solution reflects all physical phenomena such as rate of heat transfer, temperature, velocity and pressure distributions within the computational domain. The approach used here provides heat exchanger manufacturers with valuable design information without having to produce prototypes that are based not only on expensive, but also on time-consuming trial and error methods.

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Thermal optimization of shell and tube heat exchanger using porous baffles

Cited by 86 publications

References 47 publications

Review on the Performance Evaluation of Thermal Exchangers using Different Baffle Designs

Review on the Performance Evaluation of Thermal Exchangers using Different Baffle Designs

Body-fitted topology optimization of 2D and 3D fluid-to-fluid heat exchangers

Numerical Investigation of the Effects of Baffles in a Shell and Tube Heat Exchanger

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