Modeling of a Membrane Based Humidifier for Fuel Cell Applications Subject to End-Of-Life Conditions

Mads Pagh Nielsen, Anders Christian Olesen, Alan Menard

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Proton Exchange Membrane (PEM) Fuel Cell Stacks efficiently convert the chemical energy in hydrogen to electricity through electrochemical reactions occurring on either side of a proton conducting electrolyte. This is a promising and very robust energy conversion process which can be used in many applications. For instance for automotive applications and various backup power systems substituting batteries. Humidification of the inlet air of PEM fuel cell stacks is essential to obtain optimum proton conductivity. Operational humidities of the anode and cathode streams having dew points close to the fuel cell operating temperature are required. These conditions must be met at the Beginning-Of-Life (BOL) as well as at the End-Of-Life (EOL) of the fuel cell system. This paper presents results of a numerical 1D model of the heat- and mass transport phenomena in a membrane humidifier with a Nafion-based water permeable membrane. Results are presented at nominal BOL-conditions and extreme EOL-conditions. A detailed sub-model incorporating the water absorption/desorption kinetics of Nafion and a novel and accurate representation of the diffusion coefficient of water in Nafion was implemented. The modeling explains why Nafion fails as a water permeable membrane at typical EOL-conditions.
Original languageEnglish
Title of host publicationProceedings of the 55th International Conference on Simulation and Modelling (SIMS 2014)
Number of pages10
PublisherLinköping University Electronic Press
Publication date9 Dec 2014
Edition108
ISBN (Electronic)978-91-7519-376-2
Publication statusPublished - 9 Dec 2014
Event55th International Conference on Simulation and Modelling (SIMS 2014) - Aalborg, Denmark
Duration: 21 Oct 201422 Oct 2014

Conference

Conference55th International Conference on Simulation and Modelling (SIMS 2014)
CountryDenmark
CityAalborg
Period21/10/201422/10/2014
SeriesLinköping Electronic Conference Proceedings
Number108
ISSN1650-3686

Keywords

  • PEM fuel cell systems
  • Membrane Humidifiers
  • Nafion water diffusion
  • Numerical modeling

Fingerprint Dive into the research topics of 'Modeling of a Membrane Based Humidifier for Fuel Cell Applications Subject to End-Of-Life Conditions'. Together they form a unique fingerprint.

Cite this