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 language | English |
|---|---|
| Pages (from-to) | 626-635 |
| Number of pages | 10 |
| Journal | Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
| Volume | 68 |
| Issue number | 666 |
| Publication status | Published - 2002 Feb |
| Externally published | Yes |
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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 journal › Article
}
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
AN - SCOPUS:0036487946
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 -