Global sensitivity study on the semisubmersible substructure of a floating wind turbine: Manufacturing cost, structural properties and hydrodynamics

Zhou, Shengtao; Müller, Kolja; Li, Chao; Xiao, Yiqing; Cheng, Po Wen

doi:10.1016/j.oceaneng.2021.108585

Cited by 18 publications

(12 citation statements)

References 16 publications

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“…Cost models have been used repeatedly within optimization frameworks with one of the main objectives being to minimise cost. However, the cost models utilised are more often than not a poor representation of cost, generally based on a £/kg value [22]- [30]. Another method used to consider the cost is reducing the mass of the structure, which is related to cost, however, this is, again, relatively poor [31]- [36].…”

Section: Related Workmentioning

confidence: 99%

“…In this work a higher steel density is considered in-order to account for welding and flanges which would otherwise be neglected. Zhou et al [30] constrains semi-submersibles geometry variables in order to optimize the structure with the hope to reduce the cost. The cost model used for the semi-submersible in their research includes the manufacturing costs: Material cost, labour costs, welding and painting.…”

Section: Related Workmentioning

confidence: 99%

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A Flexible, Multi-fidelity Levelised Cost of Energy Model for Floating Offshore Wind Turbines Multidisciplinary Design, Analysis and Optimisation Approaches

Sykes

Collu

Coraddu

2022

J. Phys.: Conf. Ser.

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As the UK takes a step towards a greener, cleaner future aiming to be net zero by 2050, continuous development of the power network is required. A clear solution is offshore wind, having already proved its feasibility and success in nearshore sites. However, a large majority of near shore sites in the UK are already being utilised. The next step is to move into deeper waters and utilise the stronger, more consistent wind resources. A solution could be floating offshore wind which is still in its infancy, with only a few operational floating wind farms installed. Building upon the multidisciplinary design, analysis, and optimisation framework (MDAO) for floating offshore wind turbines (FOWT) being developed at the University of Strathclyde, called FEDORA, the aim of this work is to refine the LCoE model adopted by FEDORA, and applying it to perform the optimisation of the floating offshore OC3 SPAR. There is limited data on cost, therefore Hywind Scotland Pilot Park will be used as a basis for the LCoE model, allowing the results to be validated. This model is not restricted to SPARs, as it establishes a general methodology to calculate the life cycle cost of floating offshore wind farms. Utilising the improved cost model this work finds four optimised SPAR structures for four different maximum angles of inclination which can be experienced in the wind turbines operation. The improved cost model has a much higher accuracy, highlighting the initial cost model underestimates the cost of the SPAR structure by around half.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

A Flexible, Multi-fidelity Levelised Cost of Energy Model for Floating Offshore Wind Turbines Multidisciplinary Design, Analysis and Optimisation Approaches

Sykes

Collu

Coraddu

2022

J. Phys.: Conf. Ser.

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show abstract

“…Such studies are outside the scope of this review but are worth mentioning due to the application of GSA to offshore wind. Zhou et al [172] conducted GSA on the semisubmersible substructure of a WT of a FOFFWF.…”

Section: Offshore Vs Onshorementioning

confidence: 99%

A review of sensitivity analysis practices in wind resource assessment

Tsvetkova

Ouarda

2021

Energy Conversion and Management

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“…Several topics can be addressed in the platform design. Zhou et al [13] reported the manufacturing cost, structural characteristics (stiffness and natural frequency), and hydrodynamics varied according to ten shape design variables for a semi-submersible platform having a simple shape with four columns (the concept presented by NAUTLUS); AAT sensitivity analysis was used to conduct the platform optimization work.…”

Section: Introductionmentioning

confidence: 99%

FOWT Stability Study According to Number of Columns Considering Amount of Materials Used

et al. 2022

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Considering stability and fabrication cost, 3–4 columns are usually adopted for semi-submersible platform designs. Although increasing the number of columns provides more stability for both floating platform and system as a whole, it is generally not economically viable. In this respect, the present work provides a high-fidelity analysis of semi-submersible platform stability and hydrodynamic response for different design concepts. The number of columns was considered as the main design parameter and was varied from 3–6 columns. The semi-submersible weight was kept constant during the simulation period by changing the column diameter and amount of ballast water. The investigation was carried out using the potential code Orcawave, the results of which were input directly to the engineering tool OrcaFlex. Four different types of semi-submersible platforms with a varying number of columns were tested and compared under extreme environmental conditions in order to ensure their stability and hydrodynamic response. The simulation findings revealed that platform stability was more affected by the geometrical features of the floater than by the number of columns. Furthermore, the number of columns did not have a significant impact on hydrodynamic behavior for the same platform geometry.

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Global sensitivity study on the semisubmersible substructure of a floating wind turbine: Manufacturing cost, structural properties and hydrodynamics

Cited by 18 publications

References 16 publications

A Flexible, Multi-fidelity Levelised Cost of Energy Model for Floating Offshore Wind Turbines Multidisciplinary Design, Analysis and Optimisation Approaches

A Flexible, Multi-fidelity Levelised Cost of Energy Model for Floating Offshore Wind Turbines Multidisciplinary Design, Analysis and Optimisation Approaches

A review of sensitivity analysis practices in wind resource assessment

FOWT Stability Study According to Number of Columns Considering Amount of Materials Used

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