Modeling and experimental validation of water mass balance in a PEM fuel cell stack
| Autor: | Søren Knudsen Kær, Samuel Simon Araya, Anders Christian Olesen, Mads Nielsen, Vincenzo Liso |
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| Rok vydání: | 2016 |
| Předmět: |
Water mass
Chromatography Water transport Renewable Energy Sustainability and the Environment Chemistry 020209 energy Energy Engineering and Power Technology Proton exchange membrane fuel cell Thermodynamics 02 engineering and technology Electrolyte Conductivity Condensed Matter Physics PEM fuel cell Water balance Fuel Technology Membrane hydration 0202 electrical engineering electronic engineering information engineering Water content Polymer electrolyte membrane electrolysis |
| Zdroj: | Liso, V, Araya, S S, Olesen, A C, Nielsen, M P & Kær, S K 2016, ' Modeling and experimental validation of water mass balance in a PEM fuel cell stack ', International Journal of Hydrogen Energy, vol. 41, no. 4, pp. 3079-3092 . https://doi.org/10.1016/j.ijhydene.2015.10.095 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2015.10.095 |
| Popis: | Polymer electrolyte membrane (PEM) fuel cells require good hydration in order to deliver high performance and ensure long life operation. Water is essential for proton conductivity in the membrane which increases by nearly six orders of magnitude from dry to fully hydrated. Adequate water management in PEM fuel cell is crucial in order to avoid an imbalance between water production and water removal from the fuel cell. In the present study, a novel mathematical zero-dimensional model has been formulated for the water mass balance and hydration of a polymer electrolyte membrane. This model incorporates all the essential fundamental physical and electrochemical processes occurring in the membrane electrolyte and considers the water adsorption/desorption phenomena in the membrane. The effect of diffusivity model, surface roughness and water content driving force is considered. The model is validated against experimental data. In the results it is shown that the fuel cell water balance calculated by this model shows better fit with experimental data-points compared with model where only steady state operation were considered. We conclude that this discrepancy is due a different rate of water transport when membrane absorption/desorption is considered in the model. The model becomes useful in system modeling when studying fuel cells in dynamic conditions. |
| Databáze: | OpenAIRE |
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