Journal
JOURNAL OF POWER SOURCES
Volume 183, Issue 1, Pages 205-213Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2008.04.059
Keywords
planar SOFC; flow uniformity; peak power density; fuel utilization rate; temperature gradient
Funding
- National Science Council [94-2212-E-008-021, 95-2218-E-008-018]
- Institute of Nuclear Energy Research in Taiwan [932001-INER-015, 942001-ER-011, 952001-INER-042]
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This paper investigates flow uniformity in various interconnects and its influence to cell performance of a planar SOFC. A transparent hydraulic platform was used to measure flow uniformity in different rib-channel modules of interconnects. Several 3D numerical models implemented by CFD-RC packages were established to first simulate these hydraulic experiments and then used to evaluate the cell performance of a single-cell stack using different designs of interconnects with different How uniformity over a wide range of a hydraulic Reynolds number (Re) based on a hydraulic diameter of rib-channels. Numerical flow data are found in good agreement with experimental results. it is proposed that a new design, using simple small guide varies equally spaced around the feed header of the double-inlet/single-outlet module, can effectively improve the degree of flow uniformity in interconnects resulting in 11% increase of the peak power density (PPD) which can be further increased when applying a Ni-mesh on anode. Numerical analyses demonstrate a strong influence of Re on cell performance, of which appropriate ranges of Re in both anode and cathode sides are identified for achieving a reasonably good PPD while remaining an economic fuel utilization Fate and having less temperature variations in the single-cell stack. (C) 2008 Elsevier B.V. All rights reserved.
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