| Project/Area Number |
06650266
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Keio University |
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Principal Investigator |
NAGASAKA Yuji Keio University, Mechanical Eng., Associate Professor, 理工学部, 助教授 (40129573)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Molten Carbonate Fuel Cell / Thermophysical Properties / Molten Carbonates / Thermal Diffusivity / Forced Rayleigh Scattering Method / High Temperature Melts |
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| Research Abstract |
The results obtained from the present research are summarized as follows.
(1) In order to develop a practical forced Rayleigh scattering apparatus applicable to a wide range of substances and conditions, we have invented a free-surface feating technique using CO_2 laser which does not require any cell windows.
(2) By measuring water at room temperature and molten caronates, it has been found the effect of two-dimensional heat conduction. We have analyzed the error factors, and attempted to apply new analysis to correct the errors.
(3) The thermal diffusivity of molten carbonates mixtures (Li_2CO_3-Na_2CO_3-K_2co_3 : 45.3-31.5-25.0mol% and Li_2CO_3-Na_2CO_3 : 53.3-46.7mol%) at temperatures up to 1030K.
(4) The thermal diffusivity of molten Li_2CO_3 (1130 to 1170K), Na_2CO_3 (1160 to 1260K) and K_2CO_3 (1170 to 1300K) has been measured by using sapphire glass as a sample cell. The accuracy of the present measurement is estimated to be <plus-minus> 25%. We found that the previous date by Egorov are larger than ours with a macximum deviation of about 170%.
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