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Dynamic characteristics and fast load following of 5‐kW class tubular solid oxide fuel cell/micro‐gas turbine hybrid systems
Author(s) -
Soryeok Oh,
Jing Sun,
Herb Dobbs,
Joel King
Publication year - 2013
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3031
Subject(s) - solid oxide fuel cell , transient (computer programming) , load following power plant , turbine , transient response , power (physics) , coupling (piping) , engineering , automotive engineering , computer science , mechanical engineering , distributed generation , electrical engineering , base load power plant , renewable energy , chemistry , physics , quantum mechanics , operating system , electrode , anode
SUMMARY Combining solid oxide fuel cell and gas turbine (SOFC/GT) system is a promising concept for future clean and efficient power generation. An SOFC/GT system exploits the complementary features of the two power plants, where the GT recuperates the energy in the SOFC exhaust stream and thereby boosts the overall system efficiency. Through model‐based transient analysis, however, it is shown that the intricate coupling dynamics make the transient load following very challenging. The purpose of this study is to examine the load‐following capability of 5‐kW class SOFC/micro‐GT hybrid systems in two different configurations: single‐shaft and dual‐shaft GT designs. An optimal load‐following operation scheme, aimed at achieving a proper trade‐off between high steady‐state efficiency and fast transient response is developed through model‐based dynamic analysis and optimization. Simulation results are reported to illustrate the effectiveness of the proposed optimal scheme. Copyright © 2013 John Wiley & Sons, Ltd.