... ) 02 10 2009 16 10 2009 03 11 2010 03 11 2010 electrochemical electrodes finite element analysis finite volume methods freezing proton exchange membrane fuel cells thermal analysis thermal insulation Quick startup of a proton exchange membrane fuel cell (PEMFC...

... 09 04 2010 coal gasification finite volume methods fuel cell power plants sensitivity analysis solid oxide fuel cells SOFC planar coal gasification IGFC finite volume model Solid oxide fuel cells (SOFCs) operating at elevated temperatures (873–1273 K) hold the promise...

... element analysis finite volume methods iterative methods two-phase flow Direct methanol fuel cells (DMFCs) promise to power future micro- and portable electronic devices owing to their high energy density and inherent simplicity of operation with methanol as the liquid fuel. Basically, a DMFC...

..., the bypass of cathode air, and the fuel utilization, achieving very high part-load efficiency and respecting constraints on the admitted operating range for the plant components. 07 04 2009 30 09 2009 17 03 2010 17 03 2010 compressors finite volume methods gas turbines heat...

... degrees. The periodic boundary conditions can also be seen. 17 06 2007 08 01 2008 02 09 2009 anodes differentiation electrolytes finite difference methods finite volume methods mesh generation Newton method optimisation porosity sensitivity analysis solid oxide fuel...

... analysis finite volume methods heat transfer solid oxide fuel cells temperature distribution Mathematical modeling is an essential tool for the analysis and design of fuel cells, where R&D efforts are constantly aiming to develop more efficient, economic, and durable products...

...). A cross area of the current path ( m 2 ) C s molar concentration of species s ( mol ∕ m 3 ) I electrical current load (A) J number of discretization units in the finite volume method T temperature (K) ∇ T PEN...

... ). For symmetry reasons, it is sufficient to model 1 ∕ 8 sector of the entire device. The toolbox pdelib contains a module, which provides a programming interface for the implementation of the finite volume method described above for a rather general class of coupled nonlinear diffusion...

... transport in the membrane is described in the solid and liquid phases. Both heat conduction and heat convection are included in the model. catalysts convection drag electrochemistry electrophoresis finite element analysis finite volume methods Galerkin method heat conduction osmosis Poisson...

... with a finite volume method. The planar fuel cell is divided into parallelepiped-type volumes whose number and dimensions depend on the air and fuel channels number and dimensions, which are defined by the user. Figure 1 shows the planar cell and an elementary cross-flow finite volume, which includes nine...

... distribution hydrodynamics humidity finite volume methods computational fluid dynamics fuel cell numerical modeling thermal polarization curve The performance and efficiency of the proton exchange membrane fuel cell (PEMFC) must be improved, and the issues of cost, reliability, and safety...

..., are simulated using the finite volume method. The gas flow in the porous electrodes is governed by the isotropic linear resistance model with constant porosity and permeability. The diffusions of reactant species in the porous electrodes are described by the Stefan-Maxwell relation. Effective diffusivities...

... electro-osmotic drag and diffusion and is solved using a finite volume method for a one-dimensional isothermal system. Transport properties including the water drag and diffusion coefficients and membrane ionic conductivity are expressed as functions of water content and temperature. An analytical...