Experimental investigation of in-line and staggered blockages in parallel flowfield channels of PEM fuel cells

Heidary, H.; Kermani, M.J.; Advani, Suresh G.; Prasad, Ajay K.

doi:10.1016/j.ijhydene.2016.03.028

Cited by 101 publications

(29 citation statements)

References 24 publications

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“…In order to better validate the modeling results for the channel with baffle plate, the experimental results from Heidary et al 26 are employed for comparison. All the parameters used in the model are set to be consistent with the experimental conditions in Heidary et al 26 It is…”

Section: Numerical Methods and Model Validationmentioning

confidence: 99%

“…Actually, a comparison for the channel without baffle plate is given in Yin et al, which shows excellent agreement between the modeling and experimental results. In order to better validate the modeling results for the channel with baffle plate, the experimental results from Heidary et al are employed for comparison. All the parameters used in the model are set to be consistent with the experimental conditions in Heidary et al It is seen from Figure that the numerical results agree well with the experimental data.…”

Section: Model Formulationmentioning

confidence: 99%

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Influence of sloping baffle plates on the mass transport and performance of PEMFC

et al. 2018

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Summary Sloping baffle plates are installed numerically in the flow channel of proton exchange membrane fuel cell (PEMFC) to promote the mass transport in the porous electrode and the fuel cell performance. The sloping angle of baffle plate on the mass transport and performance of PEMFC are investigated and optimized. The numerical results show that the sloping angle of baffle plate influences the velocity distribution, flow resistance in the flow channel, and the intensity of mass transport between the channel and porous electrode. Larger sloping angle increases the velocity in the vertical direction which brings stronger squeeze effect between the channel and porous electrode, but it also reduces the squeeze area and increases the flow resistance. An optimization for the sloping angle of baffle plate is carried out. The baffle plate with the sloping angle of 45° shows the best performance in PEMFC net power considering the pumping power caused by the pressure loss. The effect of the baffle plate number is also investigated and optimized. The fuel cell current density increases with the baffle plate number, but the increment rate is decreased. The pumping power increases almost linearly with the baffle plate number. The PEMFC with six sloping baffle plates installed in the channel is found to be optimal in terms of the net power.

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Section: Numerical Methods and Model Validationmentioning

confidence: 99%

Section: Model Formulationmentioning

confidence: 99%

Influence of sloping baffle plates on the mass transport and performance of PEMFC

et al. 2018

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“…Heidary et al. [23] has used blockage in the flow field channel to increase the efficiency of fuel cell. They have used two types of in-line and non-linear or zigzag blockage.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of dimensions and arrangement of obstacle on the performance of PEM fuel cell

Ebrahimzadeh

Khazaee

Fasihfar

2018

Heliyon

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The fuel cell is an electrochemical energy converter which converts the chemical energy from a fuel into electricity and heat and has been able to introduce itself as a source of clean power in the world over the past few decades. One of the major technical challenges in the development of PEM fuel cell technology is to achieve high and stable efficiency. One of the key parameters in designing this type of fuel cell is the shape and dimensions of reactors flow field channels on the bipolar plates. In this research, the obstacle is simulated by selecting the obstacle geometry in the channel path, and after choosing the best range (height), the best obstacle width is analyzed to have better performance. The simulation is done for the non-obstacle case and obstacles with 0.5, 1, 1.5 and 2 mm heights and 0.9, 1.8, 2.7 and 3.6 mm widths, respectively. The obtained results for PEMFC show that the height of 1.5 mm and the width of 3.6 mm have the highest impact on the fuel cell efficiency regarding species consumption, pressure drop and current density. Once the proper dimensions of the obstacle have been determined, different arrangements of the obstacle and their effect on the fuel cell efficiency are investigated, and the best arrangement is selected.

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“…There are attempts to improve the parallel flow field design by introducing a spacious manifold or triangular shape manifold . Also techniques like baffle block presence in the parallel channels were claimed to improve the cell performance . The flow distribution and cell power were improved with a network based optimized parallel series, as investigated by Guo et al.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Convergent and Divergent Parallel Flow Fields for PEMFCs

Timurkutluk

Chowdhury

2018

Fuel Cells

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In this study, the classical parallel flow field pattern is modified by a convergent and divergent design concept for proton exchange membrane fuel cells (PEMFCs). The modification is achieved by varying the channel depth with different constant inclination gradients from the inlet to the outlet, along with the bipolar plate width which creates either a convergent or divergent flow field depending on the position of the inlet and outlet selected. The numerical model is solved to predict the cell performance including the mass transport, water vapor concentration and, pressure and current density distribution for the flow fields. The numerical results reveal that the modified convergent parallel flow fields have a better mass transport and water removal characteristics than those in the conventional one, whereas mal‐distribution of species and excessive water concentration occur in the conventional and divergent parallel flow fields. Introducing convergent parallel flow field design concept not only minimizes these issues but the cell power density is also improved by a maximum of 16%, which can show a new window in PEMFC flow field design concept.

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Experimental investigation of in-line and staggered blockages in parallel flowfield channels of PEM fuel cells

Cited by 101 publications

References 24 publications

Influence of sloping baffle plates on the mass transport and performance of PEMFC

Influence of sloping baffle plates on the mass transport and performance of PEMFC

Numerical investigation of dimensions and arrangement of obstacle on the performance of PEM fuel cell

Numerical Investigation of Convergent and Divergent Parallel Flow Fields for PEMFCs

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