Flow maldistribution in the anode of a polymer electrolyte membrane electrolysis cell employing interdigitated channels

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

Abstract

In this work a macroscopic, steady-state, three-dimensional, computational fluid dynamics model of the anode of a high-pressure polymer electrolyte membrane electrolysis cell (PEMEC) is presented. The developed model is used for studying the effect of employing an interdigitated, planar-circular cell design on the distribution of water in the anode. In the electrolysis of water using PEMEC the anode is fed by demineralized water. Throughout the anode, oxygen is produced and a two-phase flow develops. Interdigitated channels assist in avoiding that gaseous oxygen obstructs the transport of liquid water towards the catalytic layer of the electrode. As opposed to the more common serpentine and parallel channels, interdigitated channels force liquid water through the porous gas diffusion layer (GDL) of the electrode. This improves the supply of water, however it increases pressure losses. While interdigitated channels have been examined for planar-square cells in detail, less is known for planar-circular cells. To examine the extent of flow maldistribution, a base case is defined and a parameter variation is conducted relative to it. In the study, the following parameters are examined: water stoichiometry, temperature, GDL permeability and thickness. In conclusion, it is found that the interdigitated flow field results in an uneven distribution across the cell and that the extent depends strongly on the permeability and weaker on the remaining parameters.
Original languageEnglish
Title of host publicationProceedings of the 55th International Conference on Simulation and Modelling (SIMS 2014)
Number of pages9
PublisherLinköping University Electronic Press
Publication date9 Dec 2014
Edition108
Pages241-249
Article number23
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
ISSN1650-3686

Fingerprint

Electrolysis
Anodes
Electrolytes
Membranes
Polymers
Water
Diffusion in gases
Electrodes
Oxygen
Liquids
Two phase flow
Stoichiometry
Dynamic models
Flow fields
Computational fluid dynamics

Keywords

  • Flow maldistribution
  • PEMEC
  • Electrolysis
  • Modeling

Cite this

Olesen, A. C., & Kær, S. K. (2014). Flow maldistribution in the anode of a polymer electrolyte membrane electrolysis cell employing interdigitated channels. In Proceedings of the 55th International Conference on Simulation and Modelling (SIMS 2014) (108 ed., pp. 241-249). [23] Linköping University Electronic Press. Linköping Electronic Conference Proceedings
Olesen, Anders Christian ; Kær, Søren Knudsen. / Flow maldistribution in the anode of a polymer electrolyte membrane electrolysis cell employing interdigitated channels. Proceedings of the 55th International Conference on Simulation and Modelling (SIMS 2014). 108. ed. Linköping University Electronic Press, 2014. pp. 241-249 (Linköping Electronic Conference Proceedings).
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abstract = "In this work a macroscopic, steady-state, three-dimensional, computational fluid dynamics model of the anode of a high-pressure polymer electrolyte membrane electrolysis cell (PEMEC) is presented. The developed model is used for studying the effect of employing an interdigitated, planar-circular cell design on the distribution of water in the anode. In the electrolysis of water using PEMEC the anode is fed by demineralized water. Throughout the anode, oxygen is produced and a two-phase flow develops. Interdigitated channels assist in avoiding that gaseous oxygen obstructs the transport of liquid water towards the catalytic layer of the electrode. As opposed to the more common serpentine and parallel channels, interdigitated channels force liquid water through the porous gas diffusion layer (GDL) of the electrode. This improves the supply of water, however it increases pressure losses. While interdigitated channels have been examined for planar-square cells in detail, less is known for planar-circular cells. To examine the extent of flow maldistribution, a base case is defined and a parameter variation is conducted relative to it. In the study, the following parameters are examined: water stoichiometry, temperature, GDL permeability and thickness. In conclusion, it is found that the interdigitated flow field results in an uneven distribution across the cell and that the extent depends strongly on the permeability and weaker on the remaining parameters.",
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Olesen, AC & Kær, SK 2014, Flow maldistribution in the anode of a polymer electrolyte membrane electrolysis cell employing interdigitated channels. in Proceedings of the 55th International Conference on Simulation and Modelling (SIMS 2014). 108 edn, 23, Linköping University Electronic Press, Linköping Electronic Conference Proceedings, pp. 241-249, 55th International Conference on Simulation and Modelling (SIMS 2014), Aalborg, Denmark, 21/10/2014.

Flow maldistribution in the anode of a polymer electrolyte membrane electrolysis cell employing interdigitated channels. / Olesen, Anders Christian; Kær, Søren Knudsen.

Proceedings of the 55th International Conference on Simulation and Modelling (SIMS 2014). 108. ed. Linköping University Electronic Press, 2014. p. 241-249 23 (Linköping Electronic Conference Proceedings).

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

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N2 - In this work a macroscopic, steady-state, three-dimensional, computational fluid dynamics model of the anode of a high-pressure polymer electrolyte membrane electrolysis cell (PEMEC) is presented. The developed model is used for studying the effect of employing an interdigitated, planar-circular cell design on the distribution of water in the anode. In the electrolysis of water using PEMEC the anode is fed by demineralized water. Throughout the anode, oxygen is produced and a two-phase flow develops. Interdigitated channels assist in avoiding that gaseous oxygen obstructs the transport of liquid water towards the catalytic layer of the electrode. As opposed to the more common serpentine and parallel channels, interdigitated channels force liquid water through the porous gas diffusion layer (GDL) of the electrode. This improves the supply of water, however it increases pressure losses. While interdigitated channels have been examined for planar-square cells in detail, less is known for planar-circular cells. To examine the extent of flow maldistribution, a base case is defined and a parameter variation is conducted relative to it. In the study, the following parameters are examined: water stoichiometry, temperature, GDL permeability and thickness. In conclusion, it is found that the interdigitated flow field results in an uneven distribution across the cell and that the extent depends strongly on the permeability and weaker on the remaining parameters.

AB - In this work a macroscopic, steady-state, three-dimensional, computational fluid dynamics model of the anode of a high-pressure polymer electrolyte membrane electrolysis cell (PEMEC) is presented. The developed model is used for studying the effect of employing an interdigitated, planar-circular cell design on the distribution of water in the anode. In the electrolysis of water using PEMEC the anode is fed by demineralized water. Throughout the anode, oxygen is produced and a two-phase flow develops. Interdigitated channels assist in avoiding that gaseous oxygen obstructs the transport of liquid water towards the catalytic layer of the electrode. As opposed to the more common serpentine and parallel channels, interdigitated channels force liquid water through the porous gas diffusion layer (GDL) of the electrode. This improves the supply of water, however it increases pressure losses. While interdigitated channels have been examined for planar-square cells in detail, less is known for planar-circular cells. To examine the extent of flow maldistribution, a base case is defined and a parameter variation is conducted relative to it. In the study, the following parameters are examined: water stoichiometry, temperature, GDL permeability and thickness. In conclusion, it is found that the interdigitated flow field results in an uneven distribution across the cell and that the extent depends strongly on the permeability and weaker on the remaining parameters.

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Olesen AC, Kær SK. Flow maldistribution in the anode of a polymer electrolyte membrane electrolysis cell employing interdigitated channels. In Proceedings of the 55th International Conference on Simulation and Modelling (SIMS 2014). 108 ed. Linköping University Electronic Press. 2014. p. 241-249. 23. (Linköping Electronic Conference Proceedings).