Stall/surge dynamics of a multi-stage air compressor in response to a load transient of a hybrid solid oxide fuel cell-gas turbine system

JOURNAL OF POWER SOURCES

卷:365

Article

Azizi, Mohammad Ali¹  Brouwer, Jacob¹ 

[1] Univ Calif Irvine, Adv Power & Energy Program, Irvine, CA 92697 USA

关键词: Solid oxide fuel cell;    Hybrid fuel cell gas turbine;    Dynamic simulation;    Computational fluid dynamics;    Surge/stall dynamics;   

DOI  :  10.1016/j.jpowsour.2017.09.010

来源: Elsevier

【 摘 要 】

A better understanding of turbulent unsteady flows in gas turbine systems is necessary to design and control compressors for hybrid fuel cell-gas turbine systems. Compressor stall/surge analysis for a 4 MW hybrid solid oxide fuel cell-gas turbine system for locomotive applications is performed based upon a 1.7 MW multi-stage air compressor. Control strategies are applied to prevent operation of the hybrid SOFC-GT beyond the stall/surge lines of the compressor. Computational fluid dynamics tools are used to simulate the flow distribution and instabilities near the stall/surge line. The results show that a 1.7 MW system compressor like that of a Kawasaki gas turbine is an appropriate choice among the industrial compressors to be used in a 4 MW locomotive SOFC-GT with topping cycle design. The multi-stage radial design of the compressor enhances the ability of the compressor to maintain air flow rate during transient step-load changes. These transient step-load changes are exhibited in many potential applications for SOFC/GT systems. The compressor provides sustained air flow rate during the mild stall/surge event that occurs due to the transient step-load change that is applied, indicating that this type of compressor is well-suited for this hybrid application. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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