| Summary: | 碩士 === 國立高雄海洋科技大學 === 海事資訊科技研究所 === 105 === This study used computational fluid dynamics (CFD) to analyze the performances of an air-blower wave power generation device with the shape optimization of buoy wave energy converter, and simulated the process of waves acting on the double buoys to produce vertical kinetic energy and subsequently applying the energy to a wave power generator set to generate electricity. Notably, we can compute the average power based on the movement and output force of buoy over a period of time. The shape of buoys without smoothing and with optimal are used to compare the hydrodynamic performance of wave energy converter. The parameters of buoys are the same with a volume 21.2 m3 and 10.6 tonne for both cases considered in this study. Here the wave height is 0.6, 0.8 and 1 m, the wave period is 3 to 6 sec, and the range of gaps between the buoys is about 0.5 to 3 m. The power output of two-buoy was calculated when various conditions of waves act on the buoys, and the numerical analysis of the front and back buoys was performed. The numerical analysis of buoys effects on the wave power generation is significant because the shape optimization of two-buoy can enhance the generation of electrical power. The movement of buoy motion in the vertical direction can produce a stable output of power into the cylinder. Thus, the pressurizer will be used for implementing successfully performance of the output power more stable and smooth. The action of waves of various heights and periods on the buoys was estimated, and the displacement, force and power of the buoys were analyzed. The adopted smoothing shape design of double buoys contributed to efficient and stable ocean wave electricity generation.
Keywords：Computational fluid dynamics (CFD), an air-blower wave power generation device, shape optimization, hydrodynamic performance of wave energy converter
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