DE-FE0031180 Final Report - LGFCS Prototype System Testing - R0

DeBellis, Crispin L.

doi:10.2172/1493425

Cited by 2 publications

(1 citation statement)

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“…Anode off-gas recirculation is a common method of off-gas utilization, which aims to recycle a portion of the stack's anode off-gas by mixing it with fresh fuel and reintroducing it into the stack for power generation. SOFC systems that are either being prepared for commercialization or have already been commercialized generally use anode off-gas recirculation to improve system electrical efficiency (1)(2)(3)(4)(5), but the specific configurations vary. In the system of Osaka Gas (1), the anode off-gas is condensed, and the water is separated.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the SOFC System by Anode Recirculation

Liu¹,

Han²,

Sun³

et al. 2023

ECS Trans.

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Solid Oxide Fuel Cells (SOFCs) provides an efficient and clean pathway to generate electricity. In this study, two system configurations with anode off-gas recirculation are introduced, and corresponding process models are developed using MATLAB. The study examines the effects of two key parameters, namely system methane utilization and recirculation ratio, on system characteristics, based on the typical performance of a 30-cell stack. Suitable operating parameter ranges are selected for both system configurations, and their respective characteristics are compared. The results demonstrate that D#1 system configuration improves system fuel utilization from 76.6% to 83.0% without altering the operating conditions of the stack. D#2 system configuration achieves a fuel utilization of 88.6%. The results indicate the potential for further enhancing the electrical efficiency while maintaining the output power and operation stability. This study provides valuable insights for the design and parameter selection of practical systems in future research.

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