Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2007.05b
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- Pages.3191-3196
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- 2007
A Computational Study of the Fuel-Cell Ejector System
연료전지 이젝터 시스템에 관한 수치해석적 연구
- Published : 2007.05.30
Abstract
The present study addresses a method to operate a fuel-cell system effectively using a recirculation ejector which recycles wasted hydrogen gas. Configuration of a recirculation ejector is changed to investigate the flow behavior through it under varying operating conditions, and how such conditions affect the fuel-cell hydrogen cycle. The numerical simulations are based on a fully implicit finite volume scheme of the axisymmetric, compressible, Reynolds-Averaged, Navier-Stokes equations for hydrogen gas, and are compared with available experimental data for validation. The results show that a hydrogen recirculation ratio is effectively controlled by a configurational alteration within the operational region in which the recirculation passage doesn't plugged by a sonic line.
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