Reaction Rate of Ti<sub>0.18</sub>Zr<sub>0.84</sub>Cr<sub>1.0</sub>Fe<sub>0.7</sub>Mn<sub>0.3</sub>Cu<sub>0.057</sub> to Use for the Heat Driven Type Compact Metal Hydride Refrigerator
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- BAE Sang-chul
- Institute of Ocean Energy, Saga University
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- KATSUTA Masafumi
- Department of Mechanical Engineering, Waseda University
Bibliographic Information
- Other Title
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- Reaction Rate of Ti0.18Zr0.84Cr1.0Fe0.7Mn0.3Cu0.057 to Use for the Heat Driven Type Compact Metal Hydride Refrigerator
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Description
Our final goal of this study is to develop the heat driven type compact metal hydride (MH) refrigeration system for the vending machine and the show case, and to attain a refrigeration temperature of 243 K by using a heat source of about 423K. The reaction rate of the MH to use for the heat source, MH used for heat source is studied firstly because the MH refrigeration system consists of two MHs, one is used for the heat source and the other is used for the cooling load extracting. As for the reaction rate in the hydriding process, initially, a rapid surface reaction, governed by the relation 1-(1-F )1/3=kht . After the MH surface has been covered by hydride, the reaction becomes diffusion controlled with the relation 1-3(1-F ' )2/3+2(1-F ' )=k'ht . The reaction rates, kh and k'h , are exponentially proportional to the pressure difference and increase with temperature. And, as for the dehydriding process, it is found out that the rate-controlling step is uniquely diffusion reaction. The dehydriding reaction rate is exponentially proportional to the pressure difference and the initial reacted fraction, and increases with temperature. Finally, on the basis of these experimental results, the brand new rate correlations are reasonably derived. The predicted results for this correlation are in successfully agreement with the experimental ones.
Journal
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- Thermal Science and Engineering
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Thermal Science and Engineering 14 (1), 1-8, 2006
The Heat Transfer Society of Japan
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Details 詳細情報について
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- CRID
- 1390001204413937408
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- NII Article ID
- 10017276144
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- NII Book ID
- AA11358679
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- ISSN
- 18822592
- 09189963
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- NDL BIB ID
- 7888966
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed