Ara es mostren els items 24-43 de 51

    • 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 obert
      In 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)
      Text en actes de congrés
      Accés obert
      Proton 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In 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'editorial
      In 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)
      Comunicació de congrés
      Accés obert
    • Modelado dinámico y validación experimental de una pila de combustible PEM 

      Husar, Attila Peter; Kunusch, Cristian; Puleston, Paul; Mayosky, Miguel Á. (2008)
      Text en actes de congrés
      Accés obert
      Resumen: En el presente trabajo se desarrolla un modelo dinámico apto para el diseño de control de un sistema de celdas de combustible experimental tipo PEM (Polymer Electrolyte Membrane). El sistema bajo análisis está ...
    • Modelización y gestión térmica de una pila de combustible SOFC 

      Delgado Ferrer, Eloi; Serra, Maria; Husar, Attila Peter (2017)
      Text en actes de congrés
      Accés obert
      Realitzat a/amb:   Balart Enginyers
      In the present work, a dynamic lumped parameter model of the electrochemical and thermal behavior of a Solid Oxide Fuel Cell (SOFC) has been developed. The model is implemented in the MATLAB-Simulink visual programming ...
    • Modelling liquid water effect on proton-exchange membrane fuel cells 

      Aguilar Plazaola, José Agustín; Husar, Attila Peter (2019)
      Text en actes de congrés
      Accés obert
      This work introduces our ongoing research in developing accurate models for predicting and analyzing Proton-Exchange Membrane Fuel Cells performance. An initial model, whose response is compared with experimental data is ...
    • Modelling of solid oxide electrolizer and hydrogen leak estimation 

      Cifuentes López, Alejandro; Husar, Attila Peter; Roda Serrat, Vicente; Morales Comas, Miguel; Bernadet, Lucile; Torrell Faro, Marc; Serra, Maria (2019)
      Text en actes de congrés
      Accés obert
      Solid Oxide Elecyrolizers (SOEC) are electrochemical devises that produce hydrogen from water using the energy of an electric power source. SOEC operate at high temperatures (around 800ºC) and have efficiencies around 53% ...
    • Nonlinear distributed parameter observer design for fuel cell systems 

      Luna Pacho, Julio Alberto; Husar, Attila Peter; Serra, Maria (2015-09-14)
      Article
      Accés obert
      This paper presents the development of a nonlinear state observer to estimate the different gas species concentration profiles in a Proton Exchange Membrane Fuel Cell energy system. The selection of the estimated states ...
    • Nonlinear model predictive control methodology for efficiency and durability improvement in a fuel cell power system 

      Luna Pacho, Julio Alberto; Jemei, Samir; Yousfi-Steiner, Nadia; Husar, Attila Peter; Serra, Maria (2016)
      Text en actes de congrés
      Accés obert
      The main contribution of this work is the improvement of the efficiency of a PEMFC power system while guaranteeing conditions that also improve its durability. Adopting the NMPC scheme with the distributed parameter model ...
    • Nonlinear observation in fuel cell systems: a comparison between disturbance estimation and High-Order Sliding-Mode techniques 

      Luna Pacho, Julio Alberto; Usai, Elio; Husar, Attila Peter; Serra, Maria (2016-11-16)
      Article
      Accés obert
      This paper compares two Nonlinear Distributed Parameter Observers (NDPO) for the observation of a Proton Exchange Membrane Fuel Cell (PEMFC). Both NDPOs are based on the discretisation of distributed parameters models and ...
    • Nonlinear predictive control for durability enhancement and efficiency improvement in a fuel cell power system 

      Luna Pacho, Julio Alberto; Jemei, Samir; Yousfi-Steiner, Nadia; Husar, Attila Peter; Serra, Maria; Hissel, Daniel (2016)
      Article
      Accés obert
      In this work, a nonlinear model predictive control (NMPC) strategy is proposed to improve the efficiency and enhance the durability of a proton exchange membrane fuel cell (PEMFC) power system. The PEMFC controller is based ...
    • Numerical Model for Polymer Electrolyte Membrane Fuel Cells with Experimental Application and Validation 

      Alonso Mora, Javier; Husar, Attila Peter; Serra, Maria; Riera, Jordi (Riera Colomer) (2009)
      Article
      Accés obert
      The aim of this paper is to present a simple 3D computational model of a Polymer Electrolyte Membrane Fuel Cell (PEMFC) that simulates over time the heat distribution, energy and mass balance of the reactant gas flows in ...
    • Observador de estado de un sistema de generación de energía de tipo celda de combustible PEM mediante un modelo lineal variante 

      Lira Ramírez, Salvador de; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Husar, Attila Peter (2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      En este trabajo se presenta el modelado de un sistema generador de energía basado en pilas de combustible PEM mediante un modelo variante con el punto de operación (modelo LPV). Dicho modelo ha sido obtenido mediante la ...
    • Observation of the electrochemically active surface area in a proton exchange membrane fuel cell 

      Luna Pacho, Julio Alberto; Usai, Elio; Husar, Attila Peter; Serra, Maria (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      In this paper a methodology for the estimation of the Electrochemically active Surface Area (ECSA) of a Proton Exchange Membrane Fuel Cell (PEMFC) is developed. Specifically, the ECSA in the Cathode Catalyst Layer (CCL) ...
    • PEM automotive stack model with experimental validation 

      Gómez Pomar, Juan Carlos; Dombrovski, Johanna Katharina; Serra, Maria; Husar, Attila Peter (2019)
      Text en actes de congrés
      Accés obert
      Dynamic models of PEM stacks are the basis to design controllers for appropriate performance, maximum efficiency and minimum degradation. Fluid dynamic models of different dimensions can be found in the literature; however, ...
    • Performance improvement by temperature control of an open-cathode PEM fuel cell system 

      Strahl, Stephan; Perrier, Michel; Husar, Attila Peter; Riera, Jordi (Riera Colomer); Serra, Maria (2013)
      Text en actes de congrés
      Accés obert
      The work presented in this article combines experimental analysis and theoretical studies of temperature effects on the performance of an open-cathode, self-humidified PEM fuel cell system for the design of optimization ...
    • Performance improvement by temperature control of an open-cathode PEM fuel cell system 

      Strahl, Stephan; Husar, Attila Peter; Puleston, Paul Federico; Riera, Jordi (Riera Colomer) (2014-06-01)
      Article
      Accés restringit per política de l'editorial
      The work presented in this article combines experimental analysis and theoretical studies of temperature effects on the performance of an open-cathode, self-humidified PEM fuel cell system for the design of optimal control ...
    • Performance indicators for the dynamics modeling and control of PEMFC systems 

      Husar, Attila Peter (Universitat Politècnica de Catalunya, 2012-03-07)
      Tesi
      Accés obert
      Society is gradually becoming aware that the current energy industry, based on the use of fossil fuels, is inefficient, highly polluting and has a finite supply. Within the scientific community, there are indications ...