| Budget Amount *help |
¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2013: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
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| Outline of Final Research Achievements |
For the study of the bio-fouling effects on the tidal turbine performance, a bio-fouling observation by using test plates was conducted at the breakwater of Tabira port in Hirado Strait, Nagasaki Prefecture, where the maximum tidal speed is around 1.9 m/s. Test plates consist of 5 painted plates and 5 without paint were used. The observation was made to find the kind of bio-lives and the weight increase of the each plate every month and they were considered with the relation of water temperature and the chlorophyll-a. Acrylic paint lost the effect after 18 months but the normal bio-fouling paints were found to continue the bio-fouling effects.
For the evaluation of the effects on the performance of tidal turbine by the attaching of the red-barnacles, model experiments were conducted to obtain the relationship between the number of barnacles and the power coefficient of the turbine.
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