Pakrashi V, Murphy J, O’Sullivan K, Long C and O’ Kelly-Lynch P. (2013). “Structural Design Implications when a Combined Wind and Wave Energy Platform is Applied in Different Site Scenarios”, Proceedings of the Hydro 2013 International, Chennai, India (original) (raw)
Marine renewable technologies (wind, wave and tidal) have undergone significant research and development in recent years. Offshore wind is now an established industry, tidal energy is on the verge of becoming commercial whilst wave energy is still an emerging industry. The combination of wind and wave devices on single platforms may have the potential to make these renewable energy solutions more economically competitive. However, the structural design implications of such combinations have not to date been investigated in detail. This paper considers a combination of an offshore wind turbine with a monopole foundation and a point absorber wave energy device. Two site locations, on the east and the south west coast of Ireland, with widely varying resource levels and extreme conditions are used in the analysis. Ten years of simulated data from the two sites enabled the accurate assessment of site conditions. The effects of site choice on the design are investigated by comparing the steel tonnages for east coast and west coast solutions. The analysis emphasizes the importance of site choice for combined wind and wave device solutions. It also forms the basis of understanding the economic implications for combined wind-wave farms and the related impact on the cost of energy. The comparisons are also helpful in assessing the feasibility of concepts from a structural point of view before considering detailed testing or site deployment.
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