| Summary: | 碩士 === 國立交通大學 === 機械工程學系 === 100 === Fuel cells have demonstrated very high efficiency and are also much less harmful impact to the environment in general. Among these, solid oxide fuel cell (SOFC) has been considered as one of the promising energy technologies due to its high efficiency (up to 90%) that can be achieved by hybridizing with combined heat and power (CHP) system because of its operation at high temperature (500-1000 ?aC)
In this thesis, we are interested in exploring the effect on efficiency and fuel utilization by changing flow channel design of the planar solid oxide fuel cell stack. Through numerical investigation for improving the design, we can obtain several important operating parameters which can not be obtained through experiments. Therefore, we employ a commercial Computational Fluid Dynamics (CFD) code, named Ansys Fluent, by using its SOFC module in the current study. These studies include flow analysis, thermal analysis, and electrochemical analysis.
The results show that a new design, named Type C, in which the gas flow is directly across the interconnects diagonally, 12% and 14.6% of power density and fuel consumption, respectively, are found as compared to the counter flow design presented in Sembler et al. [1].
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