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Performance improvement of a PEMFC system controlling the cathode outlet air flow

Abstract

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 flow rate 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. (author)
Authors:
Feroldi, Diego; Serra, Maria; Riera, Jordi [1] 
  1. Institut de Robotica i Informatica Industrial, Universitat Politecnica de Catalunya-Consejo Superior de Investigaciones Cientificas, C. Llorens i Artigas 4, 08028 Barcelona (Spain)
Publication Date:
Jun 10, 2007
Product Type:
Journal Article
Resource Relation:
Journal Name: Journal of Power Sources; Journal Volume: 169; Journal Issue: 1; Conference: 2. National congress on fuel cells (CONAPPICE 2006), Madrid (Spain), 18-20 Oct 2006; Other Information: Elsevier Ltd. All rights reserved
Subject:
30 DIRECT ENERGY CONVERSION; PROTON EXCHANGE MEMBRANE FUEL CELLS; PERFORMANCE; CATHODES; GAS FLOW; VALVES; FLOW RATE; SIMULATION; CONTROL
OSTI ID:
20929976
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0378-7753; JPSODZ; TRN: NL07V3923
Availability:
Available from: http://dx.doi.org/10.1016/j.jpowsour.2007.01.053
Submitting Site:
ECN
Size:
page(s) 205-212
Announcement Date:
Sep 29, 2007

Citation Formats

Feroldi, Diego, Serra, Maria, and Riera, Jordi. Performance improvement of a PEMFC system controlling the cathode outlet air flow. Netherlands: N. p., 2007. Web. doi:10.1016/J.JPOWSOUR.2007.01.053.
Feroldi, Diego, Serra, Maria, & Riera, Jordi. Performance improvement of a PEMFC system controlling the cathode outlet air flow. Netherlands. doi:10.1016/J.JPOWSOUR.2007.01.053.
Feroldi, Diego, Serra, Maria, and Riera, Jordi. 2007. "Performance improvement of a PEMFC system controlling the cathode outlet air flow." Netherlands. doi:10.1016/J.JPOWSOUR.2007.01.053. https://www.osti.gov/servlets/purl/10.1016/J.JPOWSOUR.2007.01.053.
@misc{etde_20929976,
title = {Performance improvement of a PEMFC system controlling the cathode outlet air flow}
author = {Feroldi, Diego, Serra, Maria, and Riera, Jordi}
abstractNote = {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 flow rate 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. (author)}
doi = {10.1016/J.JPOWSOUR.2007.01.053}
journal = {Journal of Power Sources}
issue = {1}
volume = {169}
place = {Netherlands}
year = {2007}
month = {Jun}
}