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Cold Start Improvement of a Polymer Electrolyte Fuel Cell System by Oxygen Enrichment

Montaner Rios, Gema and Becker, Florian and Bleeck, Stefan and Gentner, Christoph and Sokolov, Igor and Schirmer, Johannes and Kallo, Josef (2019) Cold Start Improvement of a Polymer Electrolyte Fuel Cell System by Oxygen Enrichment. EFCF 2019, 03.-05. Juli. 2019, Luzern, Schweiz.

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The startup ability of a polymer electrolyte fuel cell System from subzero temperatures is essential, especially for transportation applications in winter scenarios. Extensive research has been carried out on fuel cell cold start for automotive applications with cathode air supply. In this study oxygen enriched cathode gas is used during fuel cell cold start. The aim of this experimental work is to study the influence of the cathode gas oxygen content on the cold start behaviour of a PEFC stack. Numerous tests with a 4 kW commercial fuel cell system were conducted starting from -10 °C to lower temperatures like -20 °C varying the oxygen content and other operational parameters, like the oxygen excess ratio or the starting voltage of the fuel cell stack. It was found that increasing the oxygen content shortens the cold start duration. As it can be seen in the figure this improvement is nonlinear. Increasing the content of O2 up to 30-35% can significantly reduce the startup time. The cold start processes as well as the optimal parameter combination at very low temperatures for following cathode gas: pure oxygen, synthetic air (20.9% O2) and synthetic oxygen-enriched air (optimal % O2 for the system) are to be presented. Finally, some fuel cell system concepts to improve the fuel cell cold start capability including oxygen enrichment will be discussed.

Item URL in elib:https://elib.dlr.de/128431/
Document Type:Conference or Workshop Item (Poster)
Title:Cold Start Improvement of a Polymer Electrolyte Fuel Cell System by Oxygen Enrichment
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Montaner Rios, GemaGema.MontanerRios (at) dlr.deUNSPECIFIED
Becker, FlorianFlorian.Becker (at) dlr.deUNSPECIFIED
Bleeck, StefanStefan.Bleck (at) dlr.deUNSPECIFIED
Gentner, ChristophChristoph.Gentner (at) dlr.deUNSPECIFIED
Sokolov, IgorIgor.Sokolov (at) dlr.deUNSPECIFIED
Schirmer, JohannesJohannes.Schirmer (at) dlr.deUNSPECIFIED
Kallo, JosefJosef.Kallo (at) dlr.deUNSPECIFIED
Date:3 July 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:PEM fuel cell, cold start, oxygen enrichment
Event Title:EFCF 2019
Event Location:Luzern, Schweiz
Event Type:international Conference
Event Dates:03.-05. Juli. 2019
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)
Location: Hamburg
Institutes and Institutions:Institute of Engineering Thermodynamics > Energy System Integration
Deposited By: Montaner Rios, Gema
Deposited On:22 Aug 2019 15:36
Last Modified:22 Aug 2019 15:36

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