Ara es mostren els items 33-51 de 51

    • 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 ...
    • 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 machine-based architecture to control system processes in a hybrid fuel cell electric vehicle 

      Molavi, Ali; Husar, Attila Peter; Hjortberg, Hampus; Nilsson, Niclas; Kogler, Markus; Monreal, Juan Sanchez; Eldigair, Yousif; Serra, Maria (Elsevier, 2023-07-20)
      Article
      Accés obert
      This paper presents the development and implementation of a system supervisory controller in a hydrogen-based fuel cell electric vehicle. The controller's primary function is to ensure the safe control of the fuel cell ...
    • 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 ...
    • Water transport study in high temperature proton exchange membrane fuel cell stack 

      Bezmalinovic, Dario; Strahl, Stephan; Roda Serrat, Vicente; Husar, Attila Peter (2014)
      Article
      Accés obert
      A study of water transport in a high temperature phosphoric acid doped polybenzimidazole (PBI) membrane fuel cell stack is reported. Tests with different stoichiometries of dry cathode and different humidity levels of anode ...