Abstract
This work condenses various modeling techniques for different Point Absorber configurations. An alternating frequency - time domain model is implemented in MatlabFORTRAN in order to compute the displacement, velocities and the power absorbed in the heave mode for both single and multiple body configurations. Coupling of different degrees of freedom are merely contemplated with regard to a single buoy motion. NEMOH and BEMIO solvers are applied in the solution of Newtons second law according to the Boundary Element Methodology. Initially, this Wave-to-Wire model is validated through comparison with previous experimental results for a floating cone cylinder shape (Buldra-FO3). A single, generic, vertical floating cylinder is contemplated then, that responds to the action of the passing regular waves excitation. Later, two equally sized vertical floating cylinders aligned with the incident wave direction are modeled for a variable distance between the bodies. In deep water, we approximate the convolutive radiation force function term through the Prony method. Using for instance triangular or diamond shaped arrays of three and four bodies respectively, the study delves into the interaction effects for regular waves. The results highlight the most efficient layout for maximizing the energy production whilst providing important insights into their performance, revealing displacement amplification-, capture width-ratios and the commonly known park effect.
Highlights
ISSN: 2454-1907 Impact Factor: 1.745 (I2OR)Among the large list of patented Ocean Wave Energy Converter (WEC) types, the Point Absorber (PA) technology has become predominant in the field according to
Another possibility is to deploy lines or “matrices” of single PA’s in order to cover a larger area, while absorbing more energy. These so-called Arrays might become the future of Ocean Wave Energy, since they produce more energy in theory, but they can be adapted to existing floating structures, such as Floating Production Storage and Offloading vessels (FPSO) [De Rouck(2006)] or offshore wind energy foundations
Following the past introduced theory, the section will introduce different case scenarios. These are presented in advance in the following Figure [fig:2]: Figure 2: Sectional view (a)-(b) and Isometric mesh view (c)-(d) of the Point Absorber types
Summary
ISSN: 2454-1907 Impact Factor: 1.745 (I2OR)Among the large list of patented Ocean Wave Energy Converter (WEC) types, the Point Absorber (PA) technology has become predominant in the field according to. By positioning and connecting several units close to each other, the system is addressed as a multipoint absorber [Marquis et al(2010)Marquis, Kramer, and Frigaard] Another possibility is to deploy lines or “matrices” of single PA’s in order to cover a larger area, while absorbing more energy. These so-called Arrays might become the future of Ocean Wave Energy, since they produce more energy in theory, but they can be adapted to existing floating structures, such as Floating Production Storage and Offloading vessels (FPSO) [De Rouck(2006)] or offshore wind energy foundations. The choice of the devices has been determined due to location-based proximity: either european or outer borders functionality: analogy to present study conditions proven concept: based on prototype technical reports
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