Thesis Mathematical Modeling Fuel Cell Dynamic

Thesis Mathematical Modeling Fuel Cell Dynamic-69
Nevertheless, significant computational reductions can be achieved with pseudo 2-D models, where the channel concentrations are found and used to serve as spatially varying boundary conditions for the through-the-membrane sandwich model.

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These studies suggest that fast dynamics of gas transport in the fuel cell can be neglected with relatively small errors when time scales of larger than 10 milliseconds are of interest.

In terms of reaction kinetics, the Butler-Volmer (BV) equation is traditionally used to describe activation overpotentials on both anode and cathode electrodes.

As mentioned earlier, including all these effects results in increased computational costs, whereas lower costs are desired for real-time applications.

To this end, many computationally efficient models have been proposed in the literature. developed a 0-D isothermal and dynamic model for system-level control tasks.

However, including such phenomena comes at the cost of higher computational requirements, resulting in a trade-off between model accuracy and computational speed, which must be carefully balanced based on the desired application.

As a result of these competing requirements, developing mathematical models that achieve a balance between the needs for high fidelity and low computational demand remains an active area of research.

To address this issue, many models have been proposed, where the aspect ratio of cell layers are taken into account to decouple one dimension from the other(s).

The so-called pseudo 2-D conducted numerical experiments, where they showed a pseudo 3-D model achieves the best balance between computational efficiency and model fidelity.

The results are shown to be in qualitative agreement with published experimental data, thereby providing a preliminary validation of the modeling approach.

Finally, using the modeling results, an equivalent electrical circuit model is proposed to help elucidate water transport inside various cell layers.


Comments Thesis Mathematical Modeling Fuel Cell Dynamic

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