Significance of radiative heat transfer in modeling a tubular micro-solid oxide fuel cell
A detailed mathematical model is developed and is used to study the significance of thermal radiation on cell performance. While transport equations are solved in a 2D-axisymmetric domain, radiation is modeled in 3D. It is found that radiation plays a significant role in heat transfer to a degree that without it no physically meaningful simulation can be obtained. A sensitivity analysis is performed to study the effect of the emissivity of various surfaces involved in radiation heat transfer. The emissivity of the cell surface has the highest impact on its temperature distribution, and in general larger emissivity values result in lower temperature gradients. The 25 °C temperature gradient along the cell's active length became less at higher emmisvities.
Publisher URL: https://www.sciencedirect.com/science/article/pii/S1290072920300892
DOI: 10.1016/j.ijthermalsci.2020.106499
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