.... This is expected to improve proton conductivity of the membrane. For large area cells this method can create hot spots due to high current and non-uniform temperature distribution. Hence, an alternative approach for activating PEMFC stack at low current for vehicular applications has been investigated...

... that considers non isothermal and two-phase effects. Optimized state feedback controllers with integrator and observers are used to improve control performances and results are presented. PEMFC Controls Air supply system Humidity and thermal management Fuel delivery management 1 Copyright © 2011...

... at multiple step currents and FUDS. As a result of the proposed thermal management system, the size of radiator and the capacity of the pumps for proposed design become 10% smaller than those for the typical one. In addition, the overall net power of the fuel cell system increases to 5%. PEMFC Controls...

... of the results make the model suitable for applications such as control and optimization strategies development to enhance PEMFC performance. Additionally, the model can be exploited to implement monitoring and diagnostic algorithm. water droplet oscillation and detachment lumped modeling PEMFC...

... of distribution of the physical quantities are used to extend the cells to a 100 cell. Included are analyses of the dynamic performances of the 20-cell stack and the proposed 110-cell stack models. PEMFC Dynamic Modeling Temperature Two-phase water 1 Copyright © 2010 by ASME DYNAMIC MODELING OF A 110...

... the thermal conductivity decreases with increasing PTFE content and increases with residual water. These effects are explained by the behaviour of air, water and PTFE in between the PTL fibres. Thermal conductivity PTL GDL Fuel Cell PEMFC THROUGH-PLANE THERMAL CONDUCTIVITY OF PEMFC POROUS...

... approach followed, the model is suitable for fuel cell design and optimization as well as diagnosis and control strategies development studies. 23 02 2010 PEMFC Liquid water transport Water droplets formation growth coalescence and detachment PEMFC design control and diagnosis...

... A 3-D computational model for PEMFC simulations has been developed and implemented in FLUENT, a general purpose commercial software package with multi-physics capabilities. In this modeling approach, transport equations for flow, energy, species and electro-potentials (both solid and membrane...

... In proton exchange membrane fuel cells (PEMFC), gas diffusion layers (GDL) play a critical role of supplying the oxidant and the fuel to the cathode and anode besides facilitating transfer of the electrons generated to the current collectors. In the present paper, a new low cost activated carbon...

... Air-breathing polymer electrolyte membrane fuel cells (PEMFC) are highly promising particularly for small-power applications up to tens watts class. A distinctive feature of the air-breathing PEMFC is its simple system configuration in which axial fans operate for dual purposes, supplying both...

... A 3-dimensional, two-phase Computational Fluid Dynamics (CFD) model for PEMFC simulations has been developed and implemented in FLUENT, a general-purpose commercial software package with multi-physics capabilities. The model formulation was given in details in the previous ASME fuel cell...

... This Paper focuses on modeling and simulation to analyze the characteristic of PEMFC/solar panel hybrid vehicle and to evaluate algorithms for producing hydrogen by using PEMFC and solar panel. The system includes solar panel, water electrolysis, vehicle property, induction motor etc...

... in future energy conversion systems. Fuel cell systems Exergy analysis Thermodynamic analysis System modelling Cycle Tempo PEMFC MCFC SOFC Applications Ene losses. A during c energy efficienc (exergy limit fu Electroc with mi investiga past twe helpful thermod the loss systems optimisa...

... The investigation studies improving PEMFC carbon monoxide by a periodic air dosing. The carbon monoxide in the fuel gas leads to a significant loss in power density due to CO poisoning in the anode. The method involves bleeding air into the anode fuel stream (H 2 -CO), which contains CO...

... and electro-osmotic forces in the membrane. Simulations have been conducted to analyze the effects of load currents and anode/cathode inlet pressure as well as flow rates on the dynamic variation of water content in the membrane and derive impacts on the behavior of the whole PEM fuel cell system. PEMFC...

... designs and optimize the assembly method. A fast design and convenient manufacture tool, i.e. , rapid prototyping, has been first successfully applied to the fabrication of the complicated flow channels of both DMFC and PEMFC in this paper. The honeycomb shape methanol reservoir and honeycomb cathode...

... A thermal model of the Proton Exchange Membrane Fuel Cell (PEMFC) was developed to investigate the performance of a large active area fuel cell with the water cooling thermal management system. The model includes three sub-models: water transport model, electrochemical reaction model and heat...