Cycle analysis of gas turbine-fuel cell cycle hybrid micro generation system

Hideyuki Uechi, Shinji Kimijima, Nobuhide Kasagi

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Hybrid systems, which are based on a micro gas turbine (μGT) and a solid oxide fuel cell (SOFC), are expected to achieve much higher efficiency than traditional μGT's. In this paper, the effects of cycle design parameters on the performance and feasibility of a μGT-SOFC hybrid system of 30 kW power output are investigated. It is confirmed that the hybrid system is much superior to a recuperated gas turbine in terms of its power generation efficiency and aptitude for small distributed generation. General design strategy is found that less direct fuel input to a combustor as well as higher recuperator effectiveness leads to higher generation efficiency, while higher steam-carbon ratio moderates requirements for the material strength. The best possible conceptual design of a 30-kW μGT-SOFC hybrid system is shown to give power generation efficiency over 65% (lower heating value).

Original languageEnglish
Pages (from-to)755-762
Number of pages8
JournalJournal of Engineering for Gas Turbines and Power
Volume126
Issue number4
DOIs
Publication statusPublished - 2004 Oct 1

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Fuel Technology
  • Aerospace Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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