Exploració per autor "Husar, Attila Peter"
Ara es mostren els items 9-28 de 51
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Desarrollo y calibración experimental de un modelo de un sistema de generación de energía basado en una pila de tipo PEM
Lira Ramírez, Salvador de; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Husar, Attila Peter (2010)
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Accés restringit per política de l'editorialEn este trabajo se presenta un modelo dinámico de una pila de combustible tipo PEM comercial (Ballard Nexa 1.2 kW) así como la calibración experimental de sus parámetros a partir de dados reales de laboratorio. La ... -
Description of gasket failure in a 7 cell PEMFC stack
Husar, Attila Peter; Serra, Maria; Kunusch, Cristian (Elsevier S.A., 2007)
Article
Accés obertThis article presents the data and the description of a fuel cell stack that failed due to gasket degradation. The fuel cell under study is a 7 cell stack. The unexpected change in several variables such as temperature, ... -
Development and experimental validation of a dynamic thermal and water distribution model of an open cathode proton exchange membrane fuel cell
Strahl, Stephan; Husar, Attila Peter; Serra, Maria (2011)
Article
Accés obertWater concentration in proton exchange membrane (PEM) fuel cells strongly influences performance and durability which demands for fundamental understanding of water transport mechanisms. The system efficiency can be ... -
Distributed parameter nonlinear state observer with unmatched disturbance estimation for PEMFC systems
Luna Pacho, Julio Alberto; Usai, Elio; Husar, Attila Peter; Serra, Maria (2015)
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Accés obertIn this paper a nonlinear state observer based on a distributed parameter model is proposed for a proton exchange membrane fuel cell (PEMFC). The estimation technique is implemented using a model-based nonlinear observer ... -
Dynamic water management test station for open-cathode PEMFC systems
Husar, Attila Peter; Allué Fantova, Miguel; Cañada Gracia, Marta; Riera, Jordi (Riera Colomer) (2009)
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Effect of metal hydride properties in hydrogen absorption through 2D-axisymmetric modeling and experimental testing in storage canisters
Busqué Somacarrera, Raquel; Torres Cámara, Ricardo; Grau Barceló, Joan; Roda Serrat, Vicente; Husar, Attila Peter (2017-07-27)
Article
Accés obertA two-dimensional axisymmetric model is developed to study the hydrogen absorption reaction and resultant mass and heat transport phenomena inside a metal hydride canister. The model is compared against published literature ... -
Electrode structure effects on the performance of open-cathode proton exchange membrane fuel cells: A multiscale modeling approach
Strahl, Stephan; Husar, Attila Peter; Franco, Alejandro A. (2014-06-15)
Article
Accés restringit per política de l'editorialIn this paper we present a new dynamic multiscale model of an open-cathode Polymer Electrolyte Membrane Fuel Cell (PEMFC). The model describes two-phase water transport, electrochemistry and thermal management within a ... -
Enhancing the efficiency and lifetime of a proton exchange membrane fuel cell using nonlinear model-predictive control with nonlinear observation
Luna Pacho, Julio Alberto; Usai, Elio; Husar, Attila Peter; Serra, Maria (Institute of Electrical and Electronics Engineers (IEEE), 2017-08-01)
Article
Accés obertThe aim of this research is to develop and test in a simulation environment an advanced model-based control solution for a proton exchange membrane fuel cell (PEMFC) system. A nonlinear model-predictive control (NMPC) ... -
Experimental analysis of a degraded open-cathode PEM fuel cell stack
Strahl, Stephan; Gasamans Rodríguez, Noemí; Llorca Piqué, Jordi; Husar, Attila Peter (2013)
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Accés obertThe well-known challenges to be overcome in PEM fuel cell research are their relatively low durability and high costs for the platinum catalysts. Thus, this work focuses on factors that impact durability and the links to ... -
Experimental analysis of a degraded open-cathode PEM fuel cell stack
Strahl, Stephan; Gasamans Rodríguez, Noemí; Llorca Piqué, Jordi; Husar, Attila Peter (2014)
Article
Accés obertThe well-known challenges to overcome in PEM fuel cell research are their relatively low durability and the high costs for the platinum catalysts. This work focuses on degradation mechanisms that are present in open-cathode ... -
Experimental characterization and identification of the voltage losses in an open cathode PEM fuel cell stack
Husar, Attila Peter; Strahl, Stephan; Riera, Jordi (Riera Colomer) (2011)
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Accés obertFor the past 20 years remarkable progress has been made in PEM fuel cell materials, component design, production, and system power density im-provements. However, there is still a lot to be done in the field of fuel cell ... -
Experimental characterization methodology for the identification of voltage losses of PEMFC: applied to an open cathode stack
Husar, Attila Peter; Strahl, Stephan; Riera, Jordi (Riera Colomer) (2012)
Article
Accés obertThe objective of this study is to describe the methodology used to isolate the main voltage loss indicators through a simple and effective treatment of a current interrupt and current sweep. The voltage loss indicators are ... -
Experimental decoupling of single cell polarization losses
Husar, Attila Peter; D'Elia, Gaia; Roda Serrat, Vicente (2015)
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Accés obertThe decoupling of the current sweep with the Ohmic resistance is a very powerful tool to determine the magnitude of the voltage losses inside of a fuel cell. In a time frame of seconds, the fuel cell can be diagnosed and ... -
Experimental methodology for modeling water diffusion transport in a PEMFC stack with respect to membrane temperature and resistance
Husar, Attila Peter; Serra, Maria; Riera, Jordi (Riera Colomer) (Elsevier, 2008)
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Accés obertThis work proposes an experimental methodology for modeling water diffusion transport in a PEMFC, which is applied to a commercially available fuel cell stack. The effective water vapor diffusion coefficient and its dynamical ... -
Experimental study of hydrogen purge effects on performance and efficiency of an open-cathode proton exchange membrane fuel cell system
Strahl, Stephan; Husar, Attila Peter; Riera, Jordi (Riera Colomer) (2013)
Article
Accés obertThe performance and efficiency of an open-cathode PEM fuel cell system in dead-ended anode (DEA) configuration and hydrogen purges is analyzed in this work. Excess water and crossed-over nitrogen in the anode decrease the ... -
Linear identification and model adjustment of a PEM fuel cell stack
Husar, Attila Peter; Kunusch, Cristian; Puleston, Paul; Mayosky, Miguel Á.; Moré, J.J. (Elsevier, 2008)
Article
Accés obertIn the context of fuel cell stack control a mayor challenge is modeling the interdependence of various complex subsystem dynamics. In many cases, the states interaction is usually modeled through several look-up tables, ... -
Load profile effect on durability of proton exchange membrane fuel cells
Aguilar Plazaola, José Agustín; Husar, Attila Peter (2019)
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Accés obertProton Exchange Membrane Fuel Cells (PEMFC) are a promising technology for substitution of hydrocarbon powerdrives and battery based electrical supply systems. However, below-required durability is still an important factor ... -
LPV model-based fault diagnosis using relative fault sensitivity signature approach in a PEM fuel cell
Lira Ramírez, Salvador de; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Husar, Attila Peter (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
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Accés restringit per política de l'editorialIn this paper, a model-based fault diagnosis methodology for PEM fuel cell systems is presented. The methodology is based on computing residuals using a LPV observer. Fault detection is based on using adaptive threshold ... -
LPV Observer design for PEM fuel cell system: Application to fault detection
Lira Ramírez, Salvador de; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Husar, Attila Peter (2011-02-01)
Article
Accés restringit per política de l'editorialIn this paper, the modelling of an energy generation system based on polymer electrolyte membrane fuel cell (PEMFC) system through a parameter varying approach (LPV model), that takes in to account model parameter variation ... -
Mathematical modeling, numerical simulation and experimental comparison of the desorption process in a metal hydride hydrogen storage system
Busqué Somacarrera, Raquel; Torres Cámara, Ricardo; Grau Barceló, Joan; Roda Serrat, Vicente; Husar, Attila Peter (2018-01-01)
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