Optimization study of purge cycle in proton exchange membrane fuel cell system

Kaj Nikiforow (Corresponding Author), Henri Karimäki, Tommi Keränen, Jari Ihonen

Research output: Contribution to journalArticleScientificpeer-review

48 Citations (Scopus)

Abstract

In PEMFC (proton exchange membrane fuel cell) systems operating in dead-end mode, hydrogen purges are needed to remove accumulated inert gases and liquid water from the anode side of the fuel cell stack. Hydrogen purges were studied using different humidity levels, purge times, and purge triggering criteria. The purged gas volume and composition were accurately measured with fast data acquisition and an advanced experimental set-up. The experiments were done with constant current density with aim of keeping the anode gas recirculation rate constant. Fuel utilization per pass varied as the hydrogen content on the anode side changed. This study demonstrates how the optimized purge strategy changes with a changing humidity level. It also shows that high fuel efficiency (>99%) is easily reached and that with optimized purge strategy a very high fuel efficiency (99.9%) can be reached. It was also shown that concentration polarization due to accumulation of inert gases on the anode side is two times higher than values obtained by theoretical calculations. This result is significant for purge strategy and system design.
Original languageEnglish
Pages (from-to)336-344
Number of pages9
JournalJournal of Power Sources
Volume238
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Proton exchange membrane fuel cells (PEMFC)
fuel cells
Anodes
anodes
membranes
Noble Gases
Hydrogen
cycles
optimization
protons
Inert gases
humidity
rare gases
Atmospheric humidity
hydrogen
Gases
gases
systems engineering
data acquisition
Fuel cells

Keywords

  • PEMFC system
  • Purge cycle
  • inert build-up
  • hydrogen quality

Cite this

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title = "Optimization study of purge cycle in proton exchange membrane fuel cell system",
abstract = "In PEMFC (proton exchange membrane fuel cell) systems operating in dead-end mode, hydrogen purges are needed to remove accumulated inert gases and liquid water from the anode side of the fuel cell stack. Hydrogen purges were studied using different humidity levels, purge times, and purge triggering criteria. The purged gas volume and composition were accurately measured with fast data acquisition and an advanced experimental set-up. The experiments were done with constant current density with aim of keeping the anode gas recirculation rate constant. Fuel utilization per pass varied as the hydrogen content on the anode side changed. This study demonstrates how the optimized purge strategy changes with a changing humidity level. It also shows that high fuel efficiency (>99{\%}) is easily reached and that with optimized purge strategy a very high fuel efficiency (99.9{\%}) can be reached. It was also shown that concentration polarization due to accumulation of inert gases on the anode side is two times higher than values obtained by theoretical calculations. This result is significant for purge strategy and system design.",
keywords = "PEMFC system, Purge cycle, inert build-up, hydrogen quality",
author = "Kaj Nikiforow and Henri Karim{\"a}ki and Tommi Ker{\"a}nen and Jari Ihonen",
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pages = "336--344",
journal = "Journal of Power Sources",
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Optimization study of purge cycle in proton exchange membrane fuel cell system. / Nikiforow, Kaj (Corresponding Author); Karimäki, Henri; Keränen, Tommi; Ihonen, Jari.

In: Journal of Power Sources, Vol. 238, 2013, p. 336-344.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Optimization study of purge cycle in proton exchange membrane fuel cell system

AU - Nikiforow, Kaj

AU - Karimäki, Henri

AU - Keränen, Tommi

AU - Ihonen, Jari

PY - 2013

Y1 - 2013

N2 - In PEMFC (proton exchange membrane fuel cell) systems operating in dead-end mode, hydrogen purges are needed to remove accumulated inert gases and liquid water from the anode side of the fuel cell stack. Hydrogen purges were studied using different humidity levels, purge times, and purge triggering criteria. The purged gas volume and composition were accurately measured with fast data acquisition and an advanced experimental set-up. The experiments were done with constant current density with aim of keeping the anode gas recirculation rate constant. Fuel utilization per pass varied as the hydrogen content on the anode side changed. This study demonstrates how the optimized purge strategy changes with a changing humidity level. It also shows that high fuel efficiency (>99%) is easily reached and that with optimized purge strategy a very high fuel efficiency (99.9%) can be reached. It was also shown that concentration polarization due to accumulation of inert gases on the anode side is two times higher than values obtained by theoretical calculations. This result is significant for purge strategy and system design.

AB - In PEMFC (proton exchange membrane fuel cell) systems operating in dead-end mode, hydrogen purges are needed to remove accumulated inert gases and liquid water from the anode side of the fuel cell stack. Hydrogen purges were studied using different humidity levels, purge times, and purge triggering criteria. The purged gas volume and composition were accurately measured with fast data acquisition and an advanced experimental set-up. The experiments were done with constant current density with aim of keeping the anode gas recirculation rate constant. Fuel utilization per pass varied as the hydrogen content on the anode side changed. This study demonstrates how the optimized purge strategy changes with a changing humidity level. It also shows that high fuel efficiency (>99%) is easily reached and that with optimized purge strategy a very high fuel efficiency (99.9%) can be reached. It was also shown that concentration polarization due to accumulation of inert gases on the anode side is two times higher than values obtained by theoretical calculations. This result is significant for purge strategy and system design.

KW - PEMFC system

KW - Purge cycle

KW - inert build-up

KW - hydrogen quality

U2 - 10.1016/j.jpowsour.2012.11.153

DO - 10.1016/j.jpowsour.2012.11.153

M3 - Article

VL - 238

SP - 336

EP - 344

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

ER -