Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems

Mads Pagh Nielsen, Søren Juhl Andreasen, Peder Lund Rasmussen, Søren Knudsen Kær

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch

705 Downloads (Pure)

Abstract

Degradation phenomena in HTPEM fuel cells for use in CHP systems were investigated experimentally and by modeling. It was found that the two main degradation mechanisms in HTPEM fuel cells are carbon corrosion and Pt agglomeration. On basis of this conclusion a mechanistic model, describing the degradation caused by these phenomena, is suggested. Using the proposed model, information about optimum operational temperatures is derived. To investigate how the degradation propagates on stack level, a simplified stack model is developed. The model is 1-dimensional, non-isothermal, and semi-transient (considering degradation with time). The model shows that the degradation in a stack will not progress uniformly, but occurs faster in the hot end of the stack. Furthermore, the model shows that the degradation is very dependent on stack temperature control scheme. Two experiments were conducted; a 500 hours single cell experiment and a long term stack experiment (around 800 hours so far). In the stack experiment two 1kW stacks were operated at temperatures of 150°C and 170°C. Individual stack parameters were monitored during experiments.
Original languageEnglish
Title of host publicationProceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver
Number of pages12
PublisherCanadian Hydrogen and Fuel Cell Association
Publication date2009
Publication statusPublished - 2009
EventHFC 2009 - Vancouver, Canada
Duration: 31 May 20093 Jun 2009

Conference

ConferenceHFC 2009
CountryCanada
CityVancouver
Period31/05/200903/06/2009

Fingerprint

Fuel cells
Degradation
Experiments
Temperature control
Agglomeration
Corrosion
Temperature
Carbon

Cite this

Nielsen, M. P., Andreasen, S. J., Rasmussen, P. L., & Kær, S. K. (2009). Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems. In Proceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver Canadian Hydrogen and Fuel Cell Association.
Nielsen, Mads Pagh ; Andreasen, Søren Juhl ; Rasmussen, Peder Lund ; Kær, Søren Knudsen. / Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems. Proceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver. Canadian Hydrogen and Fuel Cell Association, 2009.
@inproceedings{57a88760647411deb46f000ea68e967b,
title = "Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems",
abstract = "Degradation phenomena in HTPEM fuel cells for use in CHP systems were investigated experimentally and by modeling. It was found that the two main degradation mechanisms in HTPEM fuel cells are carbon corrosion and Pt agglomeration. On basis of this conclusion a mechanistic model, describing the degradation caused by these phenomena, is suggested. Using the proposed model, information about optimum operational temperatures is derived. To investigate how the degradation propagates on stack level, a simplified stack model is developed. The model is 1-dimensional, non-isothermal, and semi-transient (considering degradation with time). The model shows that the degradation in a stack will not progress uniformly, but occurs faster in the hot end of the stack. Furthermore, the model shows that the degradation is very dependent on stack temperature control scheme. Two experiments were conducted; a 500 hours single cell experiment and a long term stack experiment (around 800 hours so far). In the stack experiment two 1kW stacks were operated at temperatures of 150°C and 170°C. Individual stack parameters were monitored during experiments.",
author = "Nielsen, {Mads Pagh} and Andreasen, {S{\o}ren Juhl} and Rasmussen, {Peder Lund} and K{\ae}r, {S{\o}ren Knudsen}",
year = "2009",
language = "English",
booktitle = "Proceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver",
publisher = "Canadian Hydrogen and Fuel Cell Association",

}

Nielsen, MP, Andreasen, SJ, Rasmussen, PL & Kær, SK 2009, Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems. in Proceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver. Canadian Hydrogen and Fuel Cell Association, HFC 2009, Vancouver, Canada, 31/05/2009.

Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems. / Nielsen, Mads Pagh; Andreasen, Søren Juhl; Rasmussen, Peder Lund; Kær, Søren Knudsen.

Proceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver. Canadian Hydrogen and Fuel Cell Association, 2009.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch

TY - GEN

T1 - Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems

AU - Nielsen, Mads Pagh

AU - Andreasen, Søren Juhl

AU - Rasmussen, Peder Lund

AU - Kær, Søren Knudsen

PY - 2009

Y1 - 2009

N2 - Degradation phenomena in HTPEM fuel cells for use in CHP systems were investigated experimentally and by modeling. It was found that the two main degradation mechanisms in HTPEM fuel cells are carbon corrosion and Pt agglomeration. On basis of this conclusion a mechanistic model, describing the degradation caused by these phenomena, is suggested. Using the proposed model, information about optimum operational temperatures is derived. To investigate how the degradation propagates on stack level, a simplified stack model is developed. The model is 1-dimensional, non-isothermal, and semi-transient (considering degradation with time). The model shows that the degradation in a stack will not progress uniformly, but occurs faster in the hot end of the stack. Furthermore, the model shows that the degradation is very dependent on stack temperature control scheme. Two experiments were conducted; a 500 hours single cell experiment and a long term stack experiment (around 800 hours so far). In the stack experiment two 1kW stacks were operated at temperatures of 150°C and 170°C. Individual stack parameters were monitored during experiments.

AB - Degradation phenomena in HTPEM fuel cells for use in CHP systems were investigated experimentally and by modeling. It was found that the two main degradation mechanisms in HTPEM fuel cells are carbon corrosion and Pt agglomeration. On basis of this conclusion a mechanistic model, describing the degradation caused by these phenomena, is suggested. Using the proposed model, information about optimum operational temperatures is derived. To investigate how the degradation propagates on stack level, a simplified stack model is developed. The model is 1-dimensional, non-isothermal, and semi-transient (considering degradation with time). The model shows that the degradation in a stack will not progress uniformly, but occurs faster in the hot end of the stack. Furthermore, the model shows that the degradation is very dependent on stack temperature control scheme. Two experiments were conducted; a 500 hours single cell experiment and a long term stack experiment (around 800 hours so far). In the stack experiment two 1kW stacks were operated at temperatures of 150°C and 170°C. Individual stack parameters were monitored during experiments.

M3 - Article in proceeding

BT - Proceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver

PB - Canadian Hydrogen and Fuel Cell Association

ER -

Nielsen MP, Andreasen SJ, Rasmussen PL, Kær SK. Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems. In Proceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver. Canadian Hydrogen and Fuel Cell Association. 2009