Cycle analysis of micro gas turbine-solid oxide fuel cell hybrid system

Hideyuki Uechi, Shinji Kimijima, Nobuhide Kasagi

Research output: Contribution to journalArticle

4 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 (μ GT) and solid oxide fuel cell (SOFC) is expected to achieve a much higher efficiency than traditional μ GT. In this paper, we investigate the effects of cycle design parameters on the performance and feasibility of a μ GT-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 efficiency lead to higher generation efficiency, while higher steam-carbon ratio moderates requirements for the material strength. If 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. The conceptual design of a 30 kW μ GT-SOFC hybrid system, of which diameter and height are 750 mm and 1500 mm, respectively, is shown to give a power efficiency over 65% (LHV) in the best possible case.

Original languageEnglish
Pages (from-to)626-635
Number of pages10
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume68
Issue number666
Publication statusPublished - 2002 Feb
Externally publishedYes

Fingerprint

gas turbines
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Hybrid systems
Gas turbines
cycles
power efficiency
Distributed power generation
aptitude
regenerators
Recuperators
combustion chambers
steam
Conceptual design
Combustors
mechanical properties
Steam
Energy utilization
requirements
carbon

Keywords

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

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Cycle analysis of micro gas turbine-solid oxide fuel cell hybrid system. / Uechi, Hideyuki; Kimijima, Shinji; Kasagi, Nobuhide.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 68, No. 666, 02.2002, p. 626-635.

Research output: Contribution to journalArticle

@article{8ccb9fe7c9b74791a4bed6e30a43773b,
title = "Cycle analysis of micro gas turbine-solid oxide fuel cell hybrid system",
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 (μ GT) and solid oxide fuel cell (SOFC) is expected to achieve a much higher efficiency than traditional μ GT. In this paper, we investigate the effects of cycle design parameters on the performance and feasibility of a μ GT-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 efficiency lead to higher generation efficiency, while higher steam-carbon ratio moderates requirements for the material strength. If 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. The conceptual design of a 30 kW μ GT-SOFC hybrid system, of which diameter and height are 750 mm and 1500 mm, respectively, is shown to give a power efficiency over 65{\%} (LHV) in the best possible case.",
keywords = "Cycle analysis, Energy, Energy saving, Fuel cell, Gas turbine, Hybrid system, Thermal efficiency",
author = "Hideyuki Uechi and Shinji Kimijima and Nobuhide Kasagi",
year = "2002",
month = "2",
language = "English",
volume = "68",
pages = "626--635",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "666",

}

TY - JOUR

T1 - Cycle analysis of micro gas turbine-solid oxide fuel cell hybrid system

AU - Uechi, Hideyuki

AU - Kimijima, Shinji

AU - Kasagi, Nobuhide

PY - 2002/2

Y1 - 2002/2

N2 - 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 (μ GT) and solid oxide fuel cell (SOFC) is expected to achieve a much higher efficiency than traditional μ GT. In this paper, we investigate the effects of cycle design parameters on the performance and feasibility of a μ GT-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 efficiency lead to higher generation efficiency, while higher steam-carbon ratio moderates requirements for the material strength. If 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. The conceptual design of a 30 kW μ GT-SOFC hybrid system, of which diameter and height are 750 mm and 1500 mm, respectively, is shown to give a power efficiency over 65% (LHV) in the best possible case.

AB - 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 (μ GT) and solid oxide fuel cell (SOFC) is expected to achieve a much higher efficiency than traditional μ GT. In this paper, we investigate the effects of cycle design parameters on the performance and feasibility of a μ GT-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 efficiency lead to higher generation efficiency, while higher steam-carbon ratio moderates requirements for the material strength. If 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. The conceptual design of a 30 kW μ GT-SOFC hybrid system, of which diameter and height are 750 mm and 1500 mm, respectively, is shown to give a power efficiency over 65% (LHV) in the best possible case.

KW - Cycle analysis

KW - Energy

KW - Energy saving

KW - Fuel cell

KW - Gas turbine

KW - Hybrid system

KW - Thermal efficiency

UR - http://www.scopus.com/inward/record.url?scp=0036487946&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036487946&partnerID=8YFLogxK

M3 - Article

VL - 68

SP - 626

EP - 635

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 666

ER -