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Significance of radiative heat transfer in modeling a tubular micro-solid oxide fuel cell
International Journal of Thermal Sciences ( IF 4.5 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.ijthermalsci.2020.106499
Saeid Amiri , R.E. Hayes , Partha Sarkar

Abstract 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.

中文翻译:

辐射传热在管状微固体氧化物燃料电池建模中的意义

摘要 开发了一个详细的数学模型,用于研究热辐射对电池性能的影响。虽然传输方程在 2D 轴对称域中求解,但辐射在 3D 中建模。发现辐射在热传递中起着重要作用,没有它就无法获得具有物理意义的模拟。执行灵敏度分析以研究涉及辐射传热的各种表面的发射率的影响。电池表面的发射率对其温度分布的影响最大,通常较大的发射率值会导致较低的温度梯度。在较高发射率下,沿电池有效长度的 25 °C 温度梯度变小。
更新日期:2020-10-01
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