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Dynamic investigation of PEFC stacks in interaction with the air supply system

Philipps, Franz and Schiefer, Knut and Simons, Gerd (2005) Dynamic investigation of PEFC stacks in interaction with the air supply system. Journal of Power Sources (154 (2006)), pp. 412-419. Elsevier.

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Abstract

This paper explores the behaviour of a dynamically operated fuel cell system regarding to an automotive application, examining the air supply and their interaction with fuel cell stacks. The dynamic limits of stack operation are also discussed . Finally, the paper provides a description of the test facility used in these investigations. The research of dynamically operated fuel cell stacks shows that in order to achieve high energy efficiency, a power-dependent modulation of the pressure and flow rate of the air is necessary. A test faciliity designed for energy management and power train research (up to 42 kW) was used for the experiment. A number of 11.5 kW fuel cell stacks was examined experimentally with respect to performance in interaction with the air supply in stationary and dynamic operation. The stacks were tested individually and in parallel. All of them were operated "dead-end" on the hydrogen side. Experimental results varying the parameters and load curves applied to the air supply system are given in the paper. The results show different dynamic behaviours between the stacks and an substentialdiference in efficiency and dynamic response of the fuel cell system operated with different strategies. The results of different operating strategies for fuel cell systems, with respect to the interaction between the fuel cell stack and the air supply and in their dependency on air mass flow and pressure level are presented. The examinations were done with the test facility using real current demand profile of the experimental car HyLite from zero to full load and the New European Drive Cycle (NEDC).

Document Type:Article
Title:Dynamic investigation of PEFC stacks in interaction with the air supply system
Authors:
AuthorsInstitution or Email of Authors
Philipps, FranzUNSPECIFIED
Schiefer, KnutUNSPECIFIED
Simons, GerdUNSPECIFIED
Date:1 December 2005
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 412-419
Publisher:Elsevier
Status:Published
Keywords:PEFC, PEMFC, Fuel Cell, Power train, Dynamic operation, Air supply
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Transport
HGF - Program Themes:V UR - Schonung von Umwelt und Ressourcen (old)
DLR - Research area:Transport
DLR - Program:V UR - Schonung von Umwelt und Ressourcen
DLR - Research theme (Project):V -- no assignement
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts
Deposited By: Andrea Dignisz
Deposited On:07 Jul 2006
Last Modified:27 Apr 2009 12:58

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