| Project/Area Number |
08558057
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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 | 展開研究 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KAYANNE Hajime Department of Geography, the University of Tokyo, Associate Professor, 大学院・理学系研究科, 助教授 (60192548)
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| Co-Investigator(Kenkyū-buntansha) |
SAITO Hiroshi National Research laboratory of Metrology, 計量研究所, 主任研究官
斎藤 紘史 工業技術院, 計量研究所, 主任研究官
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| Project Period (FY) |
1996 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1998: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥5,700,000 (Direct Cost: ¥5,700,000)
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| Keywords | CO_2 / coastal zone / monitoring |
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| Research Abstract |
We have tested the system in the field : Ishigaki Island, the southwest Ryukyus. The system introduces a gas permeable membrane tube as the equilibrator with NDIR for measurement. It has been succeeded in reducing size, weight and power consumption : 30kg, 50x50x50cm and 300W.The stability of the system is less than *5 ppm within a range of 0 to 1000 ppm, which is enough for coastal zone monitoring where a large change in CO_2 occurrs. We compared the system with a static mixer/bubble type equilibrator. The measured CO_2 values differed with each other as much as 20 ppm. This discrepancy resulted from the changes in pressure inside the equilibrator of static mixer/bubble type by swing of the boat. Our system with a membrane equilibrator is more stable. Through the 3-year research, the development of a compact CO_2, monitoring system has been succeeded for its basic designation and practical test. We continue to brush up this system to be more widely used one.
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