The Application of the Spectral Domain Modeling to the Techno-Economic Analysis of the Adjustable Draft Point Absorbers

Conference paper (2022)

Authors

J. Tan Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
A. Jarquin Laguna Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
H. Polinder Transport Engineering and Logistics - Mechanical, Maritime and Materials Engineering
S.A. Miedema Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
Research Group
Offshore and Dredging Engineering (Mechanical, Maritime and Materials Engineering) (TU Delft)
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Published Date

2022

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Offshore and Dredging Engineering

Abstract

A spectral domain model is established to analyze the performance of a recently proposed wave energy concept, namely the adjustable draft point absorber. The non-linear hydrostatic force is incorporated in the spectral domain model. To improve the accuracy of the proposed model, the incident wave elevation is considered in the statistic linearization of the non-linear term. The proposed model is verified by the results obtained by the non-linear time domain simulations. The results suggest that the proposed spectral domain model could include the non-linear hydrostatic force while maintaining a higher computational efficiency than the non-linear time domain model. Based on the proposed model, the power performance of the adjustable draft WEC is identified. Furthermore, a techno-economic analysis is performed to reveal the benefits of the adjustable draft WEC for a given European sea site. The results show that the adjustable draft WEC is associated with higher power absorption in powerful sea states compared with the conventional fixed draft WEC. In addition, the adjustable draft system could contribute to the improvement of the annual energy production as well as the reduction of the levelized cost of energy of WECs.