Ara es mostren els items 18-37 de 38

  • 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, ...
  • 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 ...
  • 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 ...
  • 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) ...
  • 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 ...
  • Propulsión del Segway RMP 200 mediante pilas de combustible tipo PEM 

    Asunción Escorsa, Enric; Castañeda Mañe, Eduard; Husar, Attila Peter (2011)
    Text en actes de congrés
    Accés obert
    Utilizando las últimas innovaciones en las tecno-logias de pilas de combustible y en el de almace-namiento de hidrogeno disponibles en el mercado, en este trabajo se pretende equiparar las presta-ciones de un prototipo a ...
  • Robust LPV model-based sensor fault diagnosis using relative fault sensitivity signature and residual directions approaches in a PEM fuel cell 

    Lira Ramírez, Salvador de; Puig Cayuela, Vicenç; Quevedo Casín, Joseba Jokin; Husar, Attila Peter (2010)
    Text en actes de congrés
    Accés obert
    In this paper, a model-based fault diagnosis methodology for PEM fuel cell systems is presented. The methodology is based on computing residuals using an LPV observer. Sensor fault detection faces the problem of robustness ...
  • State estimation in fuel cell systems : a sliding mode approach 

    Luna Pacho, Julio Alberto; Usai, Elio; Husar, Attila Peter; Serra, Maria (2015)
    Text en actes de congrés
    Accés obert
    In this paper, a nonlinear distributed parameter observer (NDOP) is developed for the estimation of the internal condi-tions of a proton exchange membrane fuel cell (PEMFC). In particular, the estimation of the internal ...
  • State observers design for PEMFC systems 

    Luna Pacho, Julio Alberto; Husar, Attila Peter; Serra, Maria (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This work presents the development of a nonlinear state observer to estimate the values of the different gas species concentration profiles in a Proton Exchange Membrane Fuel Cell (PEMFC) energy system. The selection of ...
  • Study of hydrogen purge effects on performance and efficiency of a PEM fuel cell system 

    Strahl, Stephan; Husar, Attila Peter; Riera, Jordi (Riera Colomer) (2012)
    Text en actes de congrés
    Accés obert
    Experimental analysis and CFD modeling is used in this work to analyze system efficiency related to hydrogen purge based water management in an open-cathode PEM fuel cell system. Excess water in a deadended anode decreases ...
  • Water transport study in high temperature fuel cell stack 

    Bezmalinovic, Dario; Husar, Attila Peter (2012)
    Text en actes de congrés
    Accés obert
    This work presents analysis of water transport phenomena in the 120 Wel high temperature PEM fuel cell stack. Phosphoric acid doped PBI membranes are known for their abilities to work with dry gases; however water in the ...