Exploració per autor "Serra, Maria"
Ara es mostren els items 55-73 de 73
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Observation of the electrochemically active surface area in a proton exchange membrane fuel cell
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés obertIn 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) ... -
Observation of the internal states of a PEMFC anode gas channel
(2013)
Text en actes de congrés
Accés obertIn this work a non-linear, model-based state observer is developed. Dynamics of the system described by a distributed parameter, partial differential equations model. Forward and backward discretization of the model to ... -
Order reduction of a distributed parameter PEM fuel cell anode gas channel model
(2014)
Comunicació de congrés
Accés obertDistributed parameter modeling is required to accurately consider space variations, which are important regarding the performance and durability of the Proton Exchange Membrane Fuel Cells (PEMFC) [1-3]. However, the number ... -
Parameter fitting of a reversible solid oxide stack model
(2022)
Text en actes de congrés
Accés obertIn this work, the fitting of five parameters of a Reversible Solid Oxide (RSO) stack model is done based on data obtained at different conditions of operation. Two types of experimental curves are used: polarization curves ... -
PEM automotive stack model with experimental validation
(2019)
Text en actes de congrés
Accés obertDynamic 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, ... -
PEMFC state and parameter estimation through a high-gain based adaptive observer
(2020)
Comunicació de congrés
Accés obertThis work presents the design of an adaptive observer to estimate the cathode catalytic layer's water content of a polymer electrolyte membrane fuel cell and some of the parameters related to its water dynamics. However, ... -
PEMFC state and parameter estimation through a high-gain based adaptive observer
(2020)
Article
Accés obertThis work presents the design of an adaptive observer to estimate the cathode catalytic layer's water content of a polymer electrolyte membrane fuel cell and some of the parameters related to its water dynamics. However, ... -
Performance and degradation of proton exchange membrane fuel cells: State of the art in modeling from atomistic to system scale
(2016)
Article
Accés obertProton Exchange Membrane Fuel Cells (PEMFC) are energy efficient and environmentally friendly alternatives to conventional energy conversion systems in many yet emerging applications. In order to enable prediction of their ... -
Performance improvement by temperature control of an open-cathode PEM fuel cell system
(2013)
Text en actes de congrés
Accés obertThe 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 of a PEMFC system controlling the cathode outlet air flow
(Elsevier S.A., 2007)
Article
Accés obertThis paper presents a stationary and dynamic study of the advantages of using a regulating valve for the cathode outlet flow in combination with the compressor motor voltage as manipulated variables in a fuel cell system. ... -
Real-time parameter estimation of polymer electrolyte membrane fuel cell in absence of excitation
(Elsevier, 2024-01-02)
Article
Accés obertParameter estimation is crucial for polymer electrolyte membrane fuel cell monitoring and control. Nonetheless, most parameter estimation algorithms rely on a persistence of excitation condition, which is rarely satisfied ... -
Redox flow battery time-varying parameter estimation based on high-order sliding mode differentiators
(Wiley, 2022-07-05)
Article
Accés obertA new insight into vanadium redox flow batteries (VRFB) parameter estima-tion is presented. Driven by the electric vehicles proliferation, a hybrid fast-charging station with grid and a renewable energy connection is ... -
State estimation in fuel cell systems : a sliding mode approach
(2015)
Text en actes de congrés
Accés obertIn 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
(Elsevier, 2023-07-20)
Article
Accés obertThis 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
(2014)
Text en actes de congrés
Accés restringit per política de l'editorialThis 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 ... -
Test de interrupción de la humidificación para la diagnosis en pilas PEM
(APPICE, 2008)
Text en actes de congrés
Accés obertOne of the most demanding research topics related to the Polymer Electrolyte Membrane Fuel Cell concerns its reliability. Apart from the security aspects, it is basic to have a diagnosis of the internal state of the fuel ... -
Test de interrupción de la humidificación para la diagnosis en pilas PEM
(2008)
Text en actes de congrés
Accés restringit per política de l'editorialUno de los principales temas de investigación relacionados con las pilas de combustible del tipo de membrana de electrolito polimérico es su fiabilidad. Además de los aspectos de seguridad, es básico hacer una diagnosis ... -
Vanadium redox flow batteries real-time State of Charge and State of Health estimation under electrolyte imbalance condition
(Elsevier, 2023-09-15)
Article
Accés obertThis paper presents a novel observer architecture capable to estimate online the concentrations of the four vanadium species present in a vanadium redox flow battery (VRFB). The proposed architecture comprises three main ... -
Vanadium redox flow battery capacity loss mitigation strategy based on a comprehensive analysis of electrolyte imbalance effects
(2024-02)
Article
Accés obertElectrolyte imbalance is the main cause of capacity loss in vanadium redox flow batteries. It has been widely reported that imbalance caused by vanadium crossover can be readily recovered by remixing the electrolytes, while ...
