نتایج جستجو برای: proton exchange membrane fuel cell pemfc
تعداد نتایج: 2184049 فیلتر نتایج به سال:
This paper proposes a novel degradation prognosis of Proton Exchange Membrane Fuel Cell (PEMFC) based on Wavelet Neural Network (WNN) and Cuckoo Search Algorithm (CSA). The proposed method considering the main operating conditions PEMFC can be applied to health state prognostic under different conditions. First, data are reconstructed by locally weighted scatterplot smoothing filter noise. Then...
Current Density Distribution Mapping in PEM Fuel Cells as An Instrument for Operational Measurements
A newly developed measurement system for current density distribution mapping has enabled a new approach for operational measurements in proton exchange membrane fuel cells (PEMFC). Taking into account previously constructed measurement systems, a method based on a multi layer printed circuit board was chosen for the development of the new system. This type of system consists of a sensor, a spe...
Proton Exchange Membrane Fuel Cell (PEMFC) has unique thermal characteristics. The change in PEMFC temperature directly effects the performance. voltage and of at different loading/ambient conditions is not easy to predict. In this work a newly developed semi-empirical model used parameters are optimized for single cell (base-case) by using atom search optimization. was tested stack system but ...
Sulfonated polyether ether ketone (SPEEK) is categorized in a nonfluorinated aromatic hydrocarbon proton exchange membrane (PEM) group and considered as a suitable substitute for common per-fluorinated membranes, such as Nafion, due to wider operating temperature, less feed gas crossover, and lower cost. Since modeling results in a better understanding of a phenomenon, in this study a dynamic o...
output characteristics of fuel cells are affected by a large number of parameters such as geometry, dimensions, construction materials and conditions of supplying fluids. in this paper a mathematical model followed by a two-dimensional numerical approach has been presented to study the fuel cell parametrically. effect of oxygen concentration at gas diffusion layer entrance, temperature and pres...
In this paper, a three-dimensional, single-phase proton-exchange membrane fuel cell (PEMFC) is studied numerically. Finite volume method was used for solving the governing equations and, consequently, the numerical results were validated by comparing them with experimental data, which showed good agreement. The main objective of this work is to investigate the effect of a novel gas channel shap...
Fuel cells are electrochemical devices that convert chemical energy into electrical energy. Among various fuel proton exchange membrane cell (PEMFC) is considered one of the most promising candidates for next generation power sources because its high-power densities, zero-emission, and low operation temperature. In recent years, modeling has received enormous attention interest in understanding...
The degradation seriously affects the durability and cost of proton exchange membrane fuel cell (PEMFC). This article presents a novel model-driven method based on frequency-domain Kalman filter (FDKF) voltage model to predict PEMFC in frequency domain. advantage proposed FDKF is that it can process data groups; thus, computation time be greatly reduced with high accuracy. Two experiments under...
In this work, the influence of geometric and mechanical properties constitutive layers a Proton Exchange Membrane Fuel Cell (PEMFC) on system performance was investigated. More specifically, study focused internal electrical resistances due to interlayer contacts. Indeed, contact are one main sources ohmic losses in PEMFC therefore require special attention improve efficiency. To end, Design Ex...
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