Performance improvement of a PEMFC system controlling the cathode outlet air flow
Rights accessOpen Access
This 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. At a given load current, the cathode input and output flowrate determine the cathode pressure and stoichiometry, and consequently determine the oxygen partial pressure, the generated voltage and the compressor power consumption. In order to maintain a high efficiency during operation, the cathode output regulating valve has to be adjusted to the operating conditions, specially marked by the current drawn from the stack. Besides, the appropriate valve manipulation produces an improvement in the transient response of the system. The influence of this input variable is exploited by implementing a predictive control strategy based on dynamic matrix control (DMC), using the compressor voltage and the cathode output regulating valve as manipulated variables. The objectives of this control strategy are to regulate both the fuel cell voltage and oxygen excess ratio in the cathode, and thus, to improve the system performance. All the simulation results have been obtained using the MATLAB-Simulink environment.
CitationFeroldi, Diego; Serra, Maria; Riera, Jordi. "Performance improvement of a PEMFC system controlling the cathode outlet air flow". Journal of power sources, 2007, vol. 169, núm. 1, p. 205-212.
Showing items related by title, author, creator and subject.
The effect of the choice of the control variables of the water level control of open channels: comparison of control schemes using the ASCE Test canal 2 Horvath, Klaudia; Gómez Valentín, Manuel; Rodellar Benedé, José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
Restricted access - publisher's policyThe effect of the choice of the control action variables on centralized water level controllers for open channels is analyzed. Three models are compared. In the first model the control action variable is the discharge and ...
Minimizing control cost in resource-constrained control systems: from Feedback scheduling to event-driven control Lozoya, Camilo; Martí Colom, Pau; Velasco García, Manel (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
Open AccessThis paper evaluates approaches aimed at minimizing aggregated control cost of a set of controllers that concurrently execute sharing limited computing resources. The evaluation focuses on feedback scheduling and event-driven ...
Development of a CC-ACC control model for a RC28 controller by means of Classical Control techniques Benito Ferrer, Jaume (Universitat Politècnica de Catalunya, 2014-06-24)
Restricted access - author's decisionAquesta tesi és el resultat d’una estància de pràctiques a Fontys Automotive Lectoraat, en el grup de Recerca situat en el High Tech Automotive Campus (Helmond). L’objectiu principal del projecte es el redisseny y la ...