Climate change impact on sustainability of wave energy resources in NE Asia and Japan
| Project/Area Number |
20K04705
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 22040:Hydroengineering-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Project Status |
Granted (Fiscal Year 2020)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | Wave Energy / Climate Change / Northeast Asia / Wave energy / climate change / Japan |
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| Outline of Research at the Start |
Among the renewable energies and ocean resources, wave energy has been less investigated due to high Levelized Cost of Energy (LCOE) associated with uncertainties in energy production estimations. However, development in the extraction technology is fast and the efficiency and suitability of wave energy exploitation depend on the areas where the technology is deployed, and it affects the estimated LCOE. Recent achievements in wave energy studies show that considering factors such as short-term variations and long-term changes are important in locating suitable sites with higher efficiency.
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| Outline of Annual Research Achievements |
55 years of wave modeling was performed in Northeast Asia and intra-annual variation and long-term change were assessed. The results showed that in general, the nearshore areas of the eastern Pacific side of Japan have the highest annual mean wave power and the wave energy hotspots vary, seasonally mainly from the east of Japan during the spring to Ryukyu Islands and Taiwan during the autumn. The results indicate that the intra-annual stability of wave energy resources is the lowest in the western coasts of Japan, whereas this area has contained the least change of wave energy during five decades.
Moreover, a new climate-dependent sustainability index was proposed taking into account the amount of mean wave power, intra-annual variability in monthly scale, and long-term changes in terms of rate of change. Based on the proposed sustainability index, the eastern Pacific side of Japan is the most suitable area to supply a stable energy resource from the ocean waves. However, the depth limitation for the installation of WECs should also be considered.
Considering the potential of detected areas based on the proposed sustainability index and their depth limitations, they are the priority for further assessment of wave energy potential in local scale using higher resolution dataset as well as depth limitations and the environmental conditions.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The progress has been according to the research plan.
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| Strategy for Future Research Activity |
The detected areas as the potential places for wave energy extraction based on the proposed sustainability index and their depth limitations, are the priority for further assessment of wave energy potential in local scale. For this purpose, high resolution wave dataset are required. Hence, wave downscaling will be done in the potential areas in order to evaluate the exploitable wave energy and suggest suitable technologies for wave energy extraction in line with sustainable development.
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Report
(1 results)
Research Products
(16 results)
