| Project/Area Number |
12305017
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
YAMASAKI Hiroyuki Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering, Professor, 大学院・総合理工学研究科, 教授 (50016531)
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| Co-Investigator(Kenkyū-buntansha) |
MURAKAMI Tomoyuki Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering, Research Associate, 大学院・総合理工学研究科, 助手 (20323818)
OKAMURA Tetsuji Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering, Professor, 大学院・総合理工学研究科, 教授 (10194391)
OKUNO Yoshihiro Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering, Professor, 大学院・総合理工学研究科, 教授 (10194507)
OHGAKI Kumiko Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering, Technical Staff, 大学院・総合理工学研究科, 教務職員 (00169898)
デバシス ビスワス 東京工業大学, 大学院・総合理工学研究科, 客員助教授
BISWAS Debasis Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering, Guest Associate Professor
ビスワス デバシス 東京工業大学, 大学院・総合理工学研究科, 客員助教授
デハシス ビスワス 東京工業大学, 大学院・総合理工学研究科, 客員助教授
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥26,580,000 (Direct Cost: ¥22,500,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2002: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2001: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2000: ¥8,900,000 (Direct Cost: ¥8,900,000)
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| Keywords | plasma MHD generator / enthalpy extraction / isentropic efficiency / Helium / swirl / highest performance / MHD発電 / 高性能化 / 最高性能樹立 / ノズル負荷 |
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| Research Abstract |
The objective of present study is to improve the isentropic efficiency of the plasma MHD generator which is expected to provide very high thermal efficiency.
In the fiscal year 2000, the plasma formation in the supersonic nozzle was investigated experimentally. The experimental results indicated that the plasma formation is difficult at low seed fractions and depends on nozzle load resistance. Furthermore, it is suggested that the shock wave appears and as a result, the flow velocity is reduced significantly at high seed fractions, although the plasma formation becomes easy. As a result, the enthalpy extraction remained small and it was only 9 %.
The nozzle load resistance was optimized in the fiscal year 2001 and the enthalpy extraction increased from 9 % to 14 %. At the same time, the power output increased up to 650 kW and the advantage of high flow velocity in helium was confirmed. The isentropic efficiency was also improved significantly and the measured voltage-current curve showed higher voltage compared with that for argon.
In the fiscal year 2002, the operating condition was optimized further and an introduction of an inlet swirl was adopted. Therefore, the enthalpy extraction increased up to 30.3 % and the isentropic efficiency was remarkably improved (=63 %). The large power output of 1200 kW was also obtained. These results are the highest among all experimental data in the world.
These results have encouraged us to proceed to the next step. In the next step, we have a plan to investigate performances of plasma MHD generator under long operation time using the supersonic closed loop experimental facility.
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