Technical Guidelines for Site Investigation and Design of Offshore Wind Turbines
In 2014, the “Global 23-Year Average Wind Speed Observation” report published by international engineering consultancy company 4C Offshore revealed that there are 16 out of the world’s 20 most wind sites are located in the Taiwan Strait, with the average wind speed of 11.94~12.02 m/s (ranking 2nd in the world).
The valley effect due to particular terrain of the Taiwan Strait subjects the Strait to strong northeast monsoon during winter and moderate southwest monsoon during summer, thereby providing an ideal environment for offshore wind power. Given the Taiwan Strait is situated in an earthquake and typhoon hotspot, earthquake- and typhoon-resistant design as well as other specific concerns regarding soil liquefaction, corrosive conditions, and marine growth must be taken into account for offshore wind farm planning and development. However, current foreign offshore wind technical specifications cannot fully reflect these region-specific site conditions and thus may not be suitable for sub-structure designs of offshore wind turbines in the Taiwan Strait region.
The NTUT offshore wind power project office is engaged in gathering existing knowledge and database from domestic studies on metocean and geotechnical surveys (e.g., typhoon, earthquake, marine growth, soil liquefaction, etc.). The collected offshore data is deliberately imported into the BSMI offshore wind power database to serve as reference or support materials for BSMI project verification for offshore wind farms.
Meanwhile, the project office integrates the technical and academic energy of domestic industry, governmental authorities, academia, and research institutes to set up the technical guidelines framework for Site Investigation and Design of Offshore Wind Turbines. The framework incorporates the characteristics of local wind farm sites as well as Taiwan’s extensive experience and top-notch expertise in earthquake and typhoon-resistant engineering. It is undoubted that the offshore wind power database and technical specifications will contribute to the stability and sustainability of Taiwan’s offshore wind power.
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