Optimization of catalyst distribution along PEMFC channel through a numerical two-phase model and genetic algorithm

Ebrahimi, Sasan; Ghorbani, Babak; Vijayaraghavan, Krishna

doi:10.1016/j.renene.2017.06.067

Cited by 47 publications

(14 citation statements)

References 33 publications

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“…The results illustrated that in same operating condition, the humidification of anode side has more impact in the enhancement of current density. Ebrahimi et al [19] optimized the catalyst distribution along the PEMFC by presenting the two-phase model and using of the genetic algorithm. The geometrical parameters of PEMFC are studied by using an innovative method, which is named grey wolf optimizer.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the performance of polymer electrolyte membrane fuel cell by optimizing the operating parameter

Ahmadi

Rostami

2019

J Braz. Soc. Mech. Sci. Eng.

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In present paper it is tried to concentrate to the configurations of gas channels and gas diffusion layers influences on the performance of polymer electrolyte membrane fuel cell. At first, increasing the number of channels is considered and observed such that the best results are gained with the case of three channels. Afterward, effect of prominent GDLs is studied. The prominences size is one of the main parameters which affect the performance. For this purpose, radius (R) of prominences is grown gradually. The optimal performance is obtained in the case of R = 0.45. In addition, the inlet velocity of gas flow is surveyed. The results indicate that when the inlet velocity of gases is set about 0.2 m s −1 , the species diffusion is optimized. Also, the height of channels is investigated to find out the optimal channel height. It is found that the highest performance is achieved in channel height about h = 1 mm and R = 0.45 mm.

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Section: Introductionmentioning

confidence: 99%

Enhancing the performance of polymer electrolyte membrane fuel cell by optimizing the operating parameter

Ahmadi

Rostami

2019

J Braz. Soc. Mech. Sci. Eng.

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“…A typical PEMFC comprises 3 main parts: the anode, the membrane, and the cathode. The anode and cathode sides include bipolar plate, gas channel, gas diffusion layer, and catalyst layer . The humidified air and the hydrogen gas enter the cathode and anode channels, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…To the best of authors' knowledge, the analytical solutions in the field of fuel cells are very scarce . Most of these analytical works have focused mainly on solving the electrochemical equation using the conventional mathematical methods .…”

Section: Introductionmentioning

confidence: 99%

“…The anode and cathode sides include bipolar plate, gas channel, gas diffusion layer, and catalyst layer. [5][6][7][8][9] The humidified air and the hydrogen gas enter the cathode and anode channels, respectively. A hydrogen molecule diffuses through the anode diffusion layer towards the catalyst layer where it divides into H + and electrons:…”

mentioning

confidence: 99%

“…To the best of authors' knowledge, the analytical solutions in the field of fuel cells are very scarce. 7,8,[17][18][19][20][21][22][23][24][25] Most of these analytical works have focused mainly on solving the electrochemical equation using the conventional mathematical methods. 26 Weber et al 27 presented a critical review of modeling the transport phenomena in the PEMFCs.…”

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confidence: 99%

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Modeling of polymer electrolyte membrane fuel cell with circular and elliptical cross-section gas channels: A novel procedure

et al. 2018

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Summary The main objective of this paper is to develop an analytical solution based on the perturbation method to solve the continuity and momentum equations governing the flow in gas channels of a PEMFC having circular and elliptical cross sections. The equations are solved in both the anode and cathode gas channels with appropriately defined perturbation parameters to obtain the velocity profile in these channels. It was observed that by changing the circular cross section to an elliptical one (ie, increasing the value of perturbation parameter), the axial velocity increases. As a result, the penetration of species into the reaction areas decreases. Then, the effect of species penetration speed on the performance of PEMFC is discussed. Increasing the penetration speed (ie, radial velocity) of the reactant gases causes the maximum value of the gas velocity in the channel to decrease. This would imply that the diffusion rate of the reactant species to the reaction areas, and thereby the cell performance would be optimized. Apart from the analytical solution, 3‐D numerical solution of the governing equations using collocated finite volume method along with the SIMPLE algorithm is also performed. The results are validated against the available published data. The numerical results confirm that by converting the circular cross section to the elliptical one, while other conditions are fixed, the PEMFC produces less current density.

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Energy analysis of the absorption cooling cycle from the waste heat of the hospital sterilization unit

Şahin,

Elbir

2023

Env Prog and Sustain Energy

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Autoclave devices are used to perform high‐temperature sterilization processes under pressure. Autoclaves can be integrated with an absorption refrigeration cycle to utilize the waste heat generated at high temperature during the process. Today, many studies are carried out on the evaluation of energy resources. In this study, it is designed to obtain a cooling load by adding an integrated sub‐cycle to the waste steam heat of the autoclave device in a sterilization unit. In the lower cycle, the ammonia/water absorption refrigeration cycle is used. According to the energy analysis; With the condition that the cooling temperature is 7°C, the generator temperature of 95°C and a cooling load of 130.9 W occurred with 531.7 W of waste heat received by the absorption cooling system. Accordingly, an efficiency of COP 0.246 was obtained. The energy analysis of the absorption refrigeration cycle can improve the energy efficiency of the autoclave and save energy. In addition, the obtained cooling load will be preserved in medical supplies that need to be kept cold.

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Optimization of catalyst distribution along PEMFC channel through a numerical two-phase model and genetic algorithm

Cited by 47 publications

References 33 publications

Enhancing the performance of polymer electrolyte membrane fuel cell by optimizing the operating parameter

Enhancing the performance of polymer electrolyte membrane fuel cell by optimizing the operating parameter

Modeling of polymer electrolyte membrane fuel cell with circular and elliptical cross-section gas channels: A novel procedure

Energy analysis of the absorption cooling cycle from the waste heat of the hospital sterilization unit

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