2016 Fiscal Year Annual Research Report
海洋メタンハイドレートを用いたＣＯ２低排出発電における複雑流動現象に関する研究
| Project/Area Number |
16F16068
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| Research Institution | Tohoku University |
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Principal Investigator |
圓山 重直 東北大学, 流体科学研究所, 教授 (80173962)
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| Co-Investigator(Kenkyū-buntansha) |
CHEN LIN 東北大学, 流体科学研究所, 外国人特別研究員
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| Project Period (FY) |
2016-04-22 – 2018-03-31
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| Keywords | メタンハイドレート / 混相流 / 多孔質体 / 伝熱 / 低二酸化炭素排出システム |
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| Outline of Annual Research Achievements |
This study is focused on the fundamental physics and system analysis of the utilization of methane hydrate in low CO2 emission system. The purpose of this study is to obtain the fundamental physics and mechanisms of complex methane hydrate dissociation flows in reservoir. In this fiscal year, numerical simulation code for core-scale methane hydrate dissociation under laboratory conditions was developed. Good agreements achieved with lab experiment during pure methane hydrate dissociation processes as well as porous experiment. The numerical simulation results indicated that ice was generated in methane hydrate core due to endothermic reaction. Various behaviors in the process have been discussed, which contributed to design of large-scale real production system. Now the core-scale analysis with different initial and boundary conditions is under study. After the validation with experimental data, developed numerical simulation code was applied to the large-scale real production system. We found that initial temperature of methane hydrate reservoir had the impact to enhance the production rate. 8 international journal papers, 10 conference papers/abstracts (including 1 keynote) have been published.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The current model has successfully shown agreement with core scale experimental results, which then has been utilized quickly into large-scale analysis for system production analysis. Basic laws of production strategy in large scale production process has been investigated. Thermal efficiency analysis show a results around 40% while the CCS process is well operated in the simulation system.
3 papers on core scale analysis have been published in international journals. The large-scale strategic production model has also been proposed. 1 patent has been submitted, based on this study.
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| Strategy for Future Research Activity |
(1)To obtain the fundamental physical mechanisms of complex methane hydrate-water flows in the methane hydrate concentration zone, core-scale simulation and experiments will be continued. (2) large-scale analysis will be conducted using the open data of Nankai Trough production test in Japan. (3) Economic analysis and low emission design for a technologically robust utilization system. (4) Active publication in international journals and conferences and promotion of the low emission methane hydrate utilization studies.
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