ISWEC design tool

Sirigu, Sergej Antonello; Vissio, Giacomo; Bracco, Giovanni; Giorcelli, Ermanno; Passione, Biagio; Raffero, Mattia; Mattiazzo, Giuliana

doi:10.1016/j.ijome.2016.04.011

Cited by 18 publications

(7 citation statements)

References 4 publications

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“…The complete system is developed through a comprehensive full-scale design process that utilizes an appropriate optimization algorithm [24], [30]. To ensure that the prototype accurately represents the characteristics of a fully optimized full-scale device, Froude's law is applied, which establishes a proportional relationship between the physical characteristics of the prototype, and the corresponding features of the full-scale system.…”

Section: E Prototype and Mooring Systemmentioning

confidence: 99%

Experimental and Numerical Investigation on the Performance of a Moored Pitching Wave Energy Conversion System

Paduano,

Carapellese,

Pasta

et al. 2024

IEEE J. Oceanic Eng.

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This study delves into the question of whether the mooring system influences the dynamics of the device by conducting a comprehensive analysis of the inertial sea wave energy converter (ISWEC). Recognizing that wave energy converters exhibit complex behaviors that often push numerical models beyond their range of validity, this study highlights the importance of developing a representative model that accurately captures the intricate dynamics involved. To address this challenge, an experimental investigation of the ISWEC is conducted, aiming to establish a benchmark model that serves as a reference for validating and refining numerical models. Following the experimental investigation, this study proceeds with a numerical investigation to further explore the influence of the mooring system on the pitching device. The response of the device is analyzed both with and without the mooring system, allowing for a direct comparison of its effects on device dynamics and the associated harvested energy. By conducting numerical simulations under various operating conditions, this study provides an insight into the definition of representative mathematical modeling, analyzing and motivating the strong influence of the mooring system on the performances of a moored pitching wave energy conversion system.

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Section: E Prototype and Mooring Systemmentioning

confidence: 99%

Experimental and Numerical Investigation on the Performance of a Moored Pitching Wave Energy Conversion System

Paduano,

Carapellese,

Pasta

et al. 2024

IEEE J. Oceanic Eng.

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“…Finally, a linearised model is also built, as explained in [9], which is used for the initialisation of the HB algorithm.…”

Section: Dynamical Equationsmentioning

confidence: 99%

“…The starting pointx (0) of the root-finding algorithm is important for the computational performance of the HB method. In this paper, the ISWEC linearised model is used (see [9]), andx (0) is found by solving A x =ê, where A , similarly to A, expresses the terms of the linearised model in the frequency domain.…”

Section: Harmonic Balance Implementation Of the Iswec Modelmentioning

confidence: 99%

“…Numerical examples are shown, based on a 2-DoF model of the ISWEC, a wave energy device developed at Politecnico di Torino [9,10]. The applicability of the method is investigated in both regular and irregular waves, and a comparison with a 2 nd -order Runge-Kutta (RK2) integration is provided to better understand the advantages and limitations of the HB approach.…”

Section: Introductionmentioning

confidence: 99%

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Non Linear Simulation of a Wave Energy Converter With Multiple Degrees of Freedom Using a Harmonic Balance Method

Novo

Bracco

Sirigu

et al. 2018

Volume 10: Ocean Renewable Energy

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Computationally efficient simulation methods for wave energy converters (WECs) are useful in a variety of applications. The simulation task is particularly challenging when non-linearities are present in the WEC model. Using a Fourier projection of the system inputs and variables, harmonic balance (HB) is a computationally-efficient method to solve for the steady-state motion of a non-linear system, preserving an accurate representation of the non-linear effects. In previous work, HB has been used for the simulation of WECs with one degree of freedom (DoF). Here, HB is presented for WEC systems with an arbitrary number of DoFs. A non-linear, 2-DoF model of the ISWEC wave energy device is used as an example of application. The HB implementation of the ISWEC model is described in detail. Through numerical applications, chosen in both regular and irregular waves, general features of the HB method are exemplified, in particular the exponential convergence rate to the actual mathematical solution, and the sensitivity, in some cases, to the starting point of the HB algoritm.

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“…Therefore, the device needs to drain a small amount of the produced power to keep the gyroscope in rotation [Sirigu et al, 2016].…”

Section: Introductionmentioning

confidence: 99%

Wave Tank Testing of a Pendulum Wave Energy Converter 1:12 Scale Model

Pozzi

Bracco

Passione

et al. 2017

Int. J. Appl. Mechanics

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Wave Energy is a widespread, reliable renewable energy source. The early study on Wave Energy dates back in the 70's, with a particular effort in the last and present decade to make Wave Energy Converters (WECs) more profitable and predictable. The PeWEC (Pendulum Wave Energy Converter) is a pendulum-based WEC. The research activities described in the present work aim to develop a pendulum converter for the Mediterranean Sea, where waves are shorter, thus with a higher frequency compared to the ocean waves, a characteristic well agreeing with the PeWEC frequency response. The mechanical equations of the device are developed and coupled with the hydrodynamic Cummins equation. The work deals with the design and experimental tank test of a 1:12 scale prototype. The experimental data recorded during the testing campaign are used to validate the numerical model previously described. The numerical model proved to be in good agreement with the experiments.

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ISWEC design tool

Cited by 18 publications

References 4 publications

Experimental and Numerical Investigation on the Performance of a Moored Pitching Wave Energy Conversion System

Experimental and Numerical Investigation on the Performance of a Moored Pitching Wave Energy Conversion System

Non Linear Simulation of a Wave Energy Converter With Multiple Degrees of Freedom Using a Harmonic Balance Method

Wave Tank Testing of a Pendulum Wave Energy Converter 1:12 Scale Model

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