| Project/Area Number |
04452328
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SAITO Masaki Tokyo Institute of Technology, Associate Professor, 原子炉工学研究所, 助教授 (30215561)
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| Co-Investigator(Kenkyū-buntansha) |
FUJII-E Yoichi Tokyo Institute of Technology, Professor, 原子炉工学研究所, 教授 (10028996)
森田 毅 東京工業大学, 原子炉工学研究所, 助手 (30200421)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥4,700,000 (Direct Cost: ¥4,700,000)
Fiscal Year 1993: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1992: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Keywords | high density liquid-metal / two-phase natural circulation / MHD power generation / void fraction / gas-liquid slip ratio / cycle efficiency / two-phase flow pattern / エリクソンサイクル / 鉛・ビスマス系低融点合金 / 低融点合金 |
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| Research Abstract |
Fundamental characteristics of an advanced energy conversion system using high density two-phase natural circulation combined with liquid-metal MHD power generation were investigated theoretically and experimentally.
The cycle analysis performed to examine the sensitivities of the performance characteristics to the system parameters such as system temperatures, void fraction and gas-liquid slip ratio at the two-phase flow section, efficiencies of the components for the various combinations of the working fluids, shows that the cycle efficiency of the present system is competitive with those of the conventional steam-turbine and gas-turbine cycles. More than 50 - 60 % of cycle efficiency may be expected for the heat source with 1000 C.It is, however, found that the cycle efficiency depends strongly on the gas-liquid slip ratio at the two-phase flow section and also on generator efficiency.
In the basic experiments on the heavy metal two-phase natural circulation performed by woods-metal and nitrogen gas, the effect of the MHD power load on the gas-liquid slip ratio or the void fraction at the two-phase flow section were investigated. It is found from the present experiment that the void fraction at the two-phase flow is mainly determined by the force balance between the pressure drop at the generator and the buoyancy of the two-phase section.
The results of the present study are encouraging for future studies in the application of the present system to high temperature nuclear power plants.
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