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Cathode exhaus Gas Recirculation for Polymer Electrolyte Fuel Cell Stack

Becker, Florian and Pillath, Florian and Kallo, Josef (2018) Cathode exhaus Gas Recirculation for Polymer Electrolyte Fuel Cell Stack. In: Fuel Cells - From Fundamentals to Systems Fuel Cells - From Fundamentals to Systems, 18 (4). WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. doi: 10.1002/fuce.201700219. ISSN 1615-6854.

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Official URL: https://doi.org/10.1002/fuce.201700219


To ensure the required reliability and efficiency of a Polymer Electrolyte Fuel Cell (PEFC) system, an emergency situation in which the supply of ambient air has to be sealed off, is considered. In this case oxygen from a separate gas tank is fed to the fuel cell system. To prevent the loss of oxygen by the exhaust, the cathode gas can be fed back by cathode gas recirculation while oxygen is injected. Thereby the opportunity to feed back the humidity of the exhaust air for additional fuel cell humidification becomes available. The humidification of a PEFC is essential to ensure high protonic conductivity and reduce voltage losses. However, the water content of the inlet gas has to be regulated to prevent the electrodes from flooding. To control the humidity of the system the gas flow rate, the temperature of the fuel cell and the cathode gas can be adjusted. In addition, the enhanced water content in the system allows increasing the operating temperatures. This work focuses on an experimental study of a 12 kW PEFC-System with cathode gas recirculation and a phenomenological model to optimize the fuel cell humidification depending on the operating parameters.

Item URL in elib:https://elib.dlr.de/121443/
Document Type:Contribution to a Collection
Title:Cathode exhaus Gas Recirculation for Polymer Electrolyte Fuel Cell Stack
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Becker, FlorianFlorian.Becker (at) dlr.deUNSPECIFIED
Pillath, FlorianFlorian.Pillath (at) dlr.deUNSPECIFIED
Kallo, JosefJosef.Kallo (at) dlr.deUNSPECIFIED
Date:10 August 2018
Journal or Publication Title:Fuel Cells - From Fundamentals to Systems
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1002/fuce.201700219
EditorsEmailEditor's ORCID iD
Publisher:WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Series Name:Fuel Cells - From Fundamentals to Systems
Keywords:olymer Electrolyte Fuel Cell, (PEFC), Cathode Gas Rrecirculation, Humidification, Membrane Resistance, Fuel Cell Oxygen Supply, Phenomenological Model
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells) (old), V - Energie und Verkehr
Location: Hamburg
Institutes and Institutions:Institute of Engineering Thermodynamics > Energy System Integration
Deposited By: Becker, Florian
Deposited On:19 Nov 2018 16:30
Last Modified:01 Jan 2021 03:00

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