Cycle analysis of micro gas turbine-molten carbonate fuel cell hybrid system

Shinji Kimijima, Nobuhide Kasagi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A hybrid system based on a micro gas turbine (μGT) and a high-temperature fuel cell, i.e., molten carbonate fuel cell (MCFC) or solid oxide fuel cell (SOFC), is expected to achieve a much higher efficiency than conventional distributed power generation systems. In this study, a cycle analysis method and the performance evaluation of a μGT-MCFC hybrid system, of which the power output is 30 kW, are investigated to clarify its feasibility. We developed a general design strategy in which a low fuel input to a combustor and higher MCFC operating temperature result in a high power generation efficiency. A high recuperator temperature effectiveness and a moderate steam-carbon ratio are the requirements for obtaining a high material strength in a turbine. In addition, by employing a combustor for complete oxidation of MCFC effluents without additional fuel input, i.e., a catalytic combustor, the power generation efficiency of a μGT-MCFC is achieved at over 60% (LHV).

Original languageEnglish
Pages (from-to)65-74
Number of pages10
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Volume48
Issue number1
DOIs
Publication statusPublished - 2005 Feb 1

Keywords

  • Cycle analysis
  • Energy saving
  • Exergy
  • Fuel cell
  • Gas turbine
  • Hybrid system
  • Thermal efficiency

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

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