Abstract
This chapter explains the differences and potential issues between micro and macro fuel cell stacks and introduces microfluidics for modeling the micro-electro mechanical systems (MEMS) fuel cell bipolar plates. Scaling is the change in magnitude of proportion when fuel cells go from large to small. It can be examined in terms of systems of forces rather than a single force and covers micro fuel cells in the literature, microfluidics, flow rates and pressures, bubbles and particles, capillary effects, and single- and two-phase pressure drop. When designing and modeling MEMS fuel cells, various properties need to be considered, which can differ greatly. The system must take into account the necessary parameters. Important micro fuel cell properties are surface effects, dead volumes, bubbles, and the consideration of both gas and liquid phases. In order to progress in the area of micro fuel cells, mathematical modeling needs to be an integral part of the design process since most of the system variables cannot be measured. The lack of measurements is due to the small scale of the system and the inability to measure internal variables while the system is operating.
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