Abstract
Floating offshore wind turbine foundations are based on platforms operated by the oil and gas industry. However, they are designed and optimized to meet the wind turbines’ operating criteria. Although Malaysia is considered a low-wind-speed country, there are some locations facing the South China Sea that are found to be feasible for wind energy harnessing. The average daily wind speed may reach up to 15 m/s. Therefore, designing a cost-effective platform that can operate in Malaysian waters which has less severe environmental conditions compared to the North Sea would be a prudent undertaking. In this study, a new design of a multi-purpose floating offshore wind turbine platform (Mocha-TLP) is presented. In addition, the dynamic response of the platform to wave loads was investigated using the Navier–Stokes code STAR CCM+ developed by CD-adapco. Moreover, free-oscillation tests were performed to determine the natural periods of the platform. Three approaching wave cases and two wave conditions (WC) were considered. The results show that the natural periods of the platforms were within the recommended range for pitch, roll, yaw, heave, sway and surge motions. The platform was stable in rotational motion within the three cases. However, it experienced a noticeable surge motion which was more critical with wave condition one (WC1) since the wavelength equalled the length of the structure. The dynamic response of the platform to wave loads wase minimal and within the operational requirements for wind turbines.
Highlights
The power stations sector is one of the main sources of greenhouse gas emissions; it contributes 21.3% of the total gas emissions [1]
Wind energy is a promising source for clean energy due to the improvement in the efficiency of wind turbines and the rising development of floating structures, which allow for large offshore wind farms to be built without disturbing the ecosystems [5,6]
Several floating offshore wind turbine concepts have been proposed, and various of scaled-model experiments have been conducted in order to investigate the dynamic response of the structures to wave and wind loads
Summary
The power stations sector is one of the main sources of greenhouse gas emissions; it contributes 21.3% of the total gas emissions [1]. Several floating offshore wind turbine concepts have been proposed, and various of scaled-model experiments have been conducted in order to investigate the dynamic response of the structures to wave and wind loads. Jonkman and Matha conducted a numerical study to investigate the dynamic response of three offshore structural concepts, spar buoy, tension leg platform and barges, to support 5 MW wind turbines. Tracy conducted a parametric study to design a floating offshore wind turbine structure (MIT-TLP) based on concepts from oil and gas industries. This structure maintained good stability in calm seas without moorings when the wind turbine was not operating [27]. Eng. 2022, 10, x FOR PEERRReRegEgiViooInEnWAAiiss tthhee bbaacckkggrroouunndd,, RReeggiioonn BB iiss tthheerreefifinneemmeennttooffththeewwaatetrersusurfrafcaeceanadndRRege7igooinof nC14 Cisitshteheovoevresrestemt mesehshrerfienfienmemenetn. t
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