A chaotic heat-exchanger for PEMFC cooling applications

Lasbet, Yahia; Auvity, Bruno; Castelain, Cathy; Peerhossaini, Hassan

doi:10.1016/j.jpowsour.2005.08.030

Cited by 89 publications

(33 citation statements)

References 6 publications

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“…Such design tested in this study, S-3D geometry, has already showed important thermal performances in heat exchanger PEMFC cooling [17][18][19]. It improved greatly current heat exchanger performances for PEMFC cooling applications.…”

Section: Introductionmentioning

confidence: 81%

Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Boukhalkhal¹,

Lasbet²,

Makhlouf³

et al. 2017

IJHT

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In this study, we investigate the chaotic behavior of fluid particles in three-dimensional open geometries and their effects on the amelioration of miscible fluids mixing, thermal homogenization and thermal performances by using a computational fluid dynamics (CFD) method. Three geometry configurations (straight channel, serpentine-2D channel and chaotic geometry channel serpentine-3D) are considered. The dispersion phenomena are characterized through the presentation of the Poincaré sections and the mixing quality is quantified by calculating the mixing degree in cross section for several Reynolds numbers ranging from 5 to 200. This study reveals that height capacities in terms of mixing and heat performances are obtained by the chaotic geometry where the level mixing is superior to 0.95 for Reynolds equal to 200. In addition, the heat transfer in the S-3D is highly improved where the mean Nusselt number is 13 times bigger than that calculated in the straight channel.

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Section: Introductionmentioning

confidence: 81%

Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Boukhalkhal¹,

Lasbet²,

Makhlouf³

et al. 2017

IJHT

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“…A previous sensitivity mesh study performed by [14] shown that for each cubic cell with dimensions (a,a,a) corresponding to the three directions (x,y,z), the spatial resolution (40.40.40) is the appropriate grid to detect the velocity and temperature gradients in the fluid flow.…”

Section: Description Of the Geometry And Numerical Methodsmentioning

confidence: 99%

“…Lasbet et al [14][15] presented the evolution of the trajectory of two particles, which were initially close to each other and injected at the inlet of a C-shaped geometry. The geometry cross section was rectangular with an aspect ratio of 2 and a hydraulic diameter of 1.33mm.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Geometry Scale on the Behaviour of the Local Physical Process of the Velocity Field in the Laminar Flow

Lasbet¹,

Aidaoui²,

Loubar³

2016

IJHT

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It is well known that the convective terms in the equation of fluid motion play an outstanding role on the local proprieties of flows and they affect the local behaviour of physical processes such as deformation, rotation, stretching and folding. Large values of these processes in the flow have pronounced and lasting effects on the improvement of heat transfer and fluid mixing in ducts. The modification of the geometric scale presents an easy and adequate solution to increase these parameters. For this purpose, three dimensional zigzag channels with hydraulic diameters equal to 5 mm, 10 mm and 20 mm were examined in this study. Evolutions of the deformation rate, rotation rate and the stretching/compression coefficients of the vortices were examined for different values of the Reynolds number in three dimensional laminar open flow, using a CFD code. The results illustrate that the geometry with the smallest hydraulic diameter is the more favourable to increase the considered parameters.

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“…The average value of the Nusselt number in the C-shaped geometry is higher than those for the two other geometries. This improvement in the thermal transfer is attributed to the presence of chaotic zones in the flow [10]. Figure 6 shows the evolution of the Poiseuille number with the curvilinear coordinate in the three geometries for Reynolds number 200.…”

Section: Heat Transfer Pressure Lossesmentioning

confidence: 99%

“…An earlier paper [10] proposed a new type of geometry composed of a chaotic channel (see Figure 2c, C-shaped) that can greatly improve current heat exchanger performance for PEMFC cooling applications. Such 3D channel geometries are realized by machining judiciously both parts of the cooling bipolar plate.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Hydrodynamic Performances of Chaotic Mini-Channel: Application to the Fuel Cell Cooling

Lasbet

Auvity

Castelain

et al. 2007

Heat Transfer Engineering

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A chaotic heat-exchanger for PEMFC cooling applications

Cited by 89 publications

References 6 publications

Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Effects of the Geometry Scale on the Behaviour of the Local Physical Process of the Velocity Field in the Laminar Flow

Thermal and Hydrodynamic Performances of Chaotic Mini-Channel: Application to the Fuel Cell Cooling

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