نتایج جستجو برای: proton exchange membrane fuel cell pemfc
تعداد نتایج: 2184049 فیلتر نتایج به سال:
A one dimensional isothermal mathematical modeling of cathode side of a Proton Exchange Membrane (PEM) fuel cell is developed for the water management problem. Water transport is investigated in both cathode Gas Diffusion Layer (GDL) and membrane through solving appropriate equations for fluid flow and mass transport in GDL and water transport within the membrane. The gaseous mixture flowing in...
Because of high cost and low availability of platinum, which yet remains unavoidable as catalyst in proton exchange membrane fuel cells for achieving acceptable electric performances, numerous synthesis methods of Pt nanoparticles were developed. The decrease of the particle size in a certain extent leads to a decrease of the noble metal content in the fuel cell electrodes and also to an increa...
The artificial rabbits optimization (ARO) algorithm is proposed in this article to find the optimum values for uncertain parameters proton exchange membrane fuel cell (PEMFC) model. voltage–current polarization curve of PEMFC nonlinear, and model used paper describe it Mann’s model, which has seven parameters. sum square errors (SSE) between ARO-based estimated voltages measured defines objecti...
The proton exchange membrane fuel cell (PEMFC) stack is a key component in the cell/battery hybrid vehicle. Thermal management and optimized control of PEMFC under real driving cycle remains challenging issue. This paper presents new vehicle model, including simulations diver behavior, dynamic, unit, energy stack, cooling system, battery, DC/DC converter, motor. model had been validated against...
A three dimensional, compressible, steady, one phase flow of reactant-product mixture in the air side electrode of proton exchange membrane fuel cell (PEMFC) is numerically studied in this paper. The mixture is composed of three species: oxygen, nitrogen and water vapor. The performance of the cell is enhanced by partial blockage of the flow field channels. Various types of these blocks also ca...
Proton exchange membrane fuel cells are a new energy technology with great potential due to advantages such as high efficiency and no pollution. The structure of the gas flow channels has profound impact on overall performance cell. Different channel geometries have their own disadvantages, good understanding influence these structures can provide reference for design improvement in various app...
An improved PEMFC model is developed. The improvement of the model includes modification for electrochemical reaction and mass transfer limitation at cathode and anode side. Global sensitivity analysis is used for evaluating the sensitivity of the model in parameter estimation. The simulation results reveal that estimated mass transfer coefficients depend on current density. The comparison show...
One of the most important Fuel cells (FCs) is Proton Exchange Membrane Fuel Cells (PEMFCs). The outputvoltage of this FC depends on current loads. This paper tries to introduce, implement and control the voltage ofPEMFC, during load variations. The output voltage of fuel cell should be constant during load variation. Toachieve this goal, a controller should be designed. Here, the Lead-Lag contr...
Prognostics and health management of proton exchange membrane fuel cell (PEMFC) systems have driven increasing research attention in recent years as the durability PEMFC stack remains a technical barrier for its large-scale commercialization. To monitor state during operation, digital twin (DT), smart manufacturing technique, is applied this paper to establish an ensemble remaining useful life ...
Regenerative Fuel Cell (RFC) systems are used for the enhancement of sustainable energy aspect in conventional fuel cells. In this study, a photovoltaic-electrolyzer-fuel cell integrated cycle has been presented. The proposed system has been designed as a novel approach for alleviating the restrictions on energy streams in the RFC systems. Modeling of the system has been performed from the mas...
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