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

Hideyuki Uechi, Shinji Kimijima, Nobuhide Kasagi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

Small distributed generation systems are currently attracting much attention because of their high energy utilization efficiency. Among them, a hybrid system based on micro gas turbine (μGT) and solid oxide fuel cell (SOFC) is expected to achieve much higher efficiency than a traditional μGT. In this paper, we investigate the effects of cycle design parameters on the performance and feasibility of a μGT-SOFC hybrid system for small apartments and businesses. As a result, a general design strategy is found that less direct fuel input to combustor as well as higher recuperator effectiveness leads to higher generation efficiency, while higher steam-carbon ratio moderates requirements for the material strength. It is also confirmed that the hybrid system is much superior to the recuperated gas turbine in terms of its power efficiency and aptitude for small distributed generation. A conceptual design of a 30kW μGT-SOFC hybrid system, of which diameter and height are 750mm and 1500mm, respectively, is shown to give power efficiency over 65% (LHV) in the best possible case.

Original languageEnglish
Title of host publicationProceedings of the 2001 International Joint Power Generation Conference, Volume 2
Subtitle of host publicationNuclear Engineering Power
Pages521-530
Number of pages10
Publication statusPublished - 2001 Dec 1
Event2001 International Joint Power Generation Conference - New Orleans, LA, United States
Duration: 2001 Jun 42001 Jun 7

Publication series

NameProceedings of the International Joint Power Generation Conference
Volume2

Conference

Conference2001 International Joint Power Generation Conference
CountryUnited States
CityNew Orleans, LA
Period01/6/401/6/7

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ASJC Scopus subject areas

  • Energy(all)

Cite this

Uechi, H., Kimijima, S., & Kasagi, N. (2001). Cycle analysis of gas turbine-fuel cell hybrid micro generation system. In Proceedings of the 2001 International Joint Power Generation Conference, Volume 2: Nuclear Engineering Power (pp. 521-530). (Proceedings of the International Joint Power Generation Conference; Vol. 2).