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Simplified mathematical model of proton exchange membrane fuel cell based on horizon fuel cell stack

Journal of Modern Power Systems and Clean Energy 2016年第4期4卷 668-679页

作者： Ibrahim M.M.SALEH Rashid ALI Hongwei ZHANG Materials and Engineering Research Institute Sheffield Hallam UniversitySheffieldUK

This paper presents a simplified zero-dimensional mathematical model for a self-humidifying proton exchange membrane(PEM)fuel cell stack of 1 k *** model incorporates major electric and thermodynamic variables and parameters involved in the operation of the PEM fuel cell under different operational *** of each of these parameters and variables upon the operation and the performance of the PEM fuel cell are *** mathematical equations are modeled by using Matlab-Simulink tools in order to simulate the operation of the developed model with a commercial available 1kW horizon PEM fuel cell stack(H-1000),which is used for the purposes of model validation and tuning of the developed *** model can be extrapolated to higher wattage fuel cells of similar *** equation is presented to determine the impact of using air to supply the PEM fuel cell instead of pure oxygen upon the concentration losses and the output voltage when useful current is drawn from it.

关键词： Proton exchange membrane(PEM)fuel cell Activation losses ohmic losses Concentration losses Cathode-anode model Membrane hydration model

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Phenomena in Polarized Disperse Systems Caused by Exchange-Correlation Interaction between Particles

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Journal of Applied Mathematics and Physics 2020年第7期8卷 1304-1317页

作者： Vladimir F. Kharlamov Oryol State University Oryol Russia

We have studied the self-consistent states of nano- and micro-particle polarized powders and structures consisting of parallel particle chains and have determined conditions under which the static dielectric permittivity of a disperse system is negative. It has been shown that in such system an electric current runs without ohmic losses. We present the arguments for the physics of spontaneous emergence of the electric field in disperse systems made up of electrically neutral particles. It has been determined the influence the phase boundaries of a disperse system has on the origin of spontaneous polarization state. The structures consisting of parallel chains of dielectric particles can exhibit spontaneous polarization. In this case the properties of the spherical structure are similar to those of the ball lightning. It has been established correspondence of the obtained theoretical results with the experimental data available in the literature.

关键词： Nanostructures Negative Static Dielectric Permittivity ohmic losses Spontaneous Polarization Aerosols

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