Study on the operating pressure effect on the performance of a proton exchange membrane fuel cell power system

Qin, Yanzhou; Du, Qing; Fan, Mingzhe; Chang, Yafei; Yin, Yan

doi:10.1016/j.enconman.2017.03.035

Cited by 95 publications

(30 citation statements)

References 25 publications

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“…The best performance was obtained at the maximum temperature and maximum back pressure which were 80°C and 5 psi, respectively. These conclusions are consistent with the results of other studies . The main reason of performance improvement is due to enhanced electrode kinetics, membrane conductivity, and mass transfer of reactants at higher temperatures and pressures.…”

Section: Resultssupporting

confidence: 92%

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Optimization of the PEMFC operating parameters for cathode in the presence of PtCo/CVD graphene using factorial design

2019

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Summary Chemical vapor deposition (CVD) grown graphene‐supported PtCo catalyst was developed as a polymer electrolyte membrane fuel cell (PEMFC) cathode. The effects of cell temperature, back pressure, relative humidity, anode, and cathode flow rates on the fuel cell performance were investigated utilizing Design Expert software for statistical analysis. Cell temperature, back pressure, and relative humidity were shown to be the most critical factors to improve fuel cell performance in the presence of PtCo on CVD grown graphene. The maximum current density of 1779.5 mAcm−2 and power density of 785.38 mWcm−2 are obtained at cell temperature of 79.99°C, back pressure of 4.99 psi, relative humidity of 50%, anode flow rate of 0.156 dm3min−1, and cathode flow rate of 0.199 dm3min−1.

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Section: Resultssupporting

confidence: 92%

“…These conclusions are consistent with the results of other studies. 34,[49][50][51][52][53] The main reason of performance improvement is due to enhanced electrode kinetics, membrane conductivity, and mass transfer of reactants at higher temperatures and pressures.…”

Section: Effect Of Operating Conditions On Current and Power Densitmentioning

confidence: 99%

Optimization of the PEMFC operating parameters for cathode in the presence of PtCo/CVD graphene using factorial design

2019

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“…As for scenario 2, area covered by P – V lines is much bigger than that of scenario 1, which means higher energy consumption in scenario 2, as shown in Figures 13 and 14 . It was demonstrated by the work 36 that power output of fuel cell systems increased with the compressor pressure ratio, but it led to high energy consumption of air compressors. Theoretically, maximum energy utilization efficiency happens when n -cylinder pressure in the discharge process is the same as outlet pressure.…”

Section: Results and Discussionmentioning

confidence: 99%

Preliminary Investigations of an Opposed Rotary Piston Compressor for the Air Feeding of a Polymer Electrolyte Membrane Fuel Cell System

et al. 2020

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Automotive polymer electrolyte membrane fuel cell systems are attracting much attention, driven by the requirements of low automotive exhaust emissions and energy consumption. A polymer electrolyte membrane fuel cell system provides opportunities for the developments in different types of air compressors. This paper proposed an opposed rotary piston compressor, which had the merits of more compact structures, less movement components, and a high pressure ratio, meeting the requirements of polymer electrolyte membrane fuel cell systems. Preliminary performance evaluations of the opposed rotary piston compressor were conducted under various scenarios. This will make a foundation for optimizations of outlet pipe layouts of the compressor. A three-dimensional numerical simulation approach was used; further, in-cylinder pressure evolutions, fluid mass flow rates, and P – V diagrams were analyzed. It indicated that the cyclic period of the opposed rotary piston compressor was half of reciprocating piston compressors. The specific mass flow rate of the compressor is in the range of 0.094–0.113 kg·(s·L) −1 for the given scenarios. Outlet ports 1 and 2 dominated the mass flow in the discharge process under scenarios 1, 3, and 4. In-cylinder pressure profiles show multipeaks for all of these scenarios. In-cylinder pressure increased rapidly in the compression process and part of the discharge process, which led to high energy consumption and low adiabatic efficiency. The maximum adiabatic efficiency is approximately 43.96% among the given scenarios.

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“…The transfer coefficient is closely related to the materials of the components in the FCs 48 . Studying the impact of the transfer coefficient on the catalytic reaction contributes to guiding the material selection and performance improvement of the components in the FCs 49 .…”

Section: Resultsmentioning

confidence: 99%

A novel predicting method on degree of catalytic reaction in fuel cells

Pan

et al. 2020

Int J Energy Res

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Summary An accurate assessment of the utilization of a catalyst for fuel cells is beneficial for guiding the optimization of working conditions and adjustment of parameters. In this study, a composite model containing the numerical model of catalyst layers and improved support vector machine (SVM) is proposed to predict the catalyst utilization. The effectiveness factor of the field of catalytic reaction engineering is introduced into the numerical model. The adaptive learning factor and the differential evolution strategy are introduced to improve the ability of generalization and robustness of the distinguishing method in the SVM. The results indicate that the radial basis function is well‐suited as the kernel function of the SVM, and the accuracy of the prediction in the anode and cathode can be increased up to 99.31% and 99.65%, respectively. The increasing transfer coefficient leads to an enhancement of the catalytic reaction, and the particle size of the catalyst impacts the catalytic reaction mainly by changing the pattern of internal diffusion. Pressure has little impact on the Knudsen diffusion.

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Study on the operating pressure effect on the performance of a proton exchange membrane fuel cell power system

Cited by 95 publications

References 25 publications

Optimization of the PEMFC operating parameters for cathode in the presence of PtCo/CVD graphene using factorial design

Optimization of the PEMFC operating parameters for cathode in the presence of PtCo/CVD graphene using factorial design

Preliminary Investigations of an Opposed Rotary Piston Compressor for the Air Feeding of a Polymer Electrolyte Membrane Fuel Cell System

A novel predicting method on degree of catalytic reaction in fuel cells

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