Abstract
Using a 30year (1976-2005) daily high-resolution reanalysis wind field dataset assimilated from several meteorological data sources, the wind speed and power characteristics of the South China Sea (SCS) were investigated using the Weibull shape and scale parameters. The region in general showed good wind characteristics. This is shown by high annual mean wind speed and power density values which are 5.93 m/s and 273.84 W/m2 respectively. The calculated annual mean wind power resource attributes the region to a relatively high potential site for large- scale grid connected wind turbine applications. The wind power ranged between 96.27 W/m2 in May and 527.03 W/m2 in December. Furthermore, spatio-temporal variations showed that strong trends in wind power exist in Luzon strait in the northern SCS and Xisha, Zhongsha, Luzon, Liyue bank in the central SCS which are evaluated as high wind potential regions and may be rated as locations excellent for installation of large wind turbines for electrical energy generation. Non-significant and negative trends dominate the southern SCS and may therefore, be suitable for small wind applications. The wind power density exhibited a significant increasing trend of 1.4 W/m2 yr-1 in the SCS as a whole throughout the study period. The trend is strongest (2.8 W/m2 yr-1) in winter.
Highlights
Energy is a key factor of life sustainability on earth in terms of human and economic development
The monthly to annual ratio of wind speed and wind power density presented in figure 9 shows that peak ratios of wind speed and wind power density occurred in December with ratios of 1.36 and 1.92 respectively
Over a 30year period (1976-2005), this study used a 6hourly, daily high-resolution reanalysis wind field dataset derived from some meteorological data sources to assess the spatio-temporal variation of the wind power potential using Weibull shape and scale parameters over the South China Sea (SCS)
Summary
Energy is a key factor of life sustainability on earth in terms of human and economic development. Offshore wind energy is the energy generated by wind turbine set up in the sea. Before a wind farm can be built, a thorough assessment of the wind energy potential in the SCS must be conducted. This can be followed with detailed assessment in promising locations (Xydis et al, 2009). Using a 30 year, reanalysis wind fields from various wind observations that were assimilated and provided every 6hour, this study aims at adopting the methodologies for wind energy assessment over land locations in previous studies to the Sea using the SCS as a case study.
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