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

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskning

716 Downloads (Pure)

Abstrakt

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.
OriginalsprogEngelsk
TitelProceedings of the Hydrogen and Fuel Cells Conference (HFC) in Vancouver
Antal sider12
ForlagCanadian Hydrogen and Fuel Cell Association
Publikationsdato2009
StatusUdgivet - 2009
BegivenhedHFC 2009 - Vancouver, Canada
Varighed: 31 maj 20093 jun. 2009

Konference

KonferenceHFC 2009
LandCanada
ByVancouver
Periode31/05/200903/06/2009

Fingeraftryk Dyk ned i forskningsemnerne om 'Experimental study and modeling of degradation phenomena in HTPEM fuel cell stacks for use in CHP systems'. Sammen danner de et unikt fingeraftryk.

Citationsformater