Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7721288 | International Journal of Hydrogen Energy | 2013 | 7 Pages |
Abstract
Gas leakage often occurs in planar solid oxide fuel cell (SOFC) stacks due to small pressure differentials (2-3Â psi) between the process flows and external pressure. This gas leakage can initiate localized burning and degradation mechanisms, which result in lower stack efficiency, reduced stack lifetime, and higher overall cost. A more durable planar SOFC design that can accommodate higher operating pressure would contribute to higher efficiency and more versatile SOFC system integrations. This manuscript examines the performance of a 60-cell, planar SOFC stack up to 45Â psia. SOFC stacks can be successfully operated at elevated pressure by containment in a pressure vessel and equalization of the vessel pressure to the process pressure (i.e. anode and cathode gas flows). SOFC stacks display pressure-dependent voltage in accordance with theory, suggesting that an absolute efficiency gain of 2-3% by operating at 45Â psia versus ambient pressure (15Â psia) is achievable.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
A. Alan Burke, Louis G. Carreiro, John R. Jr.,