A symbiotic approach to the design of offshore wind turbines with other energy harvesting systems

Haji, Maha N.; Kluger, Jocelyn Maxine; Sapsis, Themistoklis P.; Slocum, Alexander H.

doi:10.1016/j.oceaneng.2018.07.026

Cited by 30 publications

(20 citation statements)

References 44 publications

(55 reference statements)

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“…A. Blanchard, D. Sapsis predicted transient instability and extreme events in arrogant systems [3]. M. Hadji, J. Kluger, D. Sapsis, A. Slocum substantiated that all this is related to the amount of energy expended and noted that one of the advantages of wave energy is higher predictability and the minimum number of changes [13]. However, modeling does not always reflect the essence of such complex abstractions as "space-time", "reality", "artificial intelligence" in their philosophical meanings.…”

Section: Methodsmentioning

confidence: 97%

Features of functional dependence of random phenomena and values in social being in conditions of its unstability (the environmental position)

Drotyanko

Kharchenko

et al. 2021

E3S Web Conf.

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The analysis of the phenomenon of “random” and the principle of the relationship of random phenomena in social reality in the conditions of its instability has been conducted. On this basis, the key task was the conceptualization of the random phenomena in the scales of typology of fundamental and social interactions. It has been confirmed that the concept of “random” in terms of instability is more effectively described through ontological, phenomenological, transcendental and functional approaches and in the context of environmental position. A probability principle was applied when describing the randomness of abstract values. It has been proved that even minor aberrations at one or another point of space at different systemic levels of the material world can profoundly change the metric properties of systems, cause their instability. The results of the research confirmed that the unstable social system does not return to the state of equilibrium from which it has came out for different reasons, but continuously it moves away from it or makes unacceptably large fluctuations around it. And functional dependence between random phenomena and quantities under conditions of social instability is possible as stability of a different kind.

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Section: Methodsmentioning

confidence: 97%

Features of functional dependence of random phenomena and values in social being in conditions of its unstability (the environmental position)

Drotyanko

Kharchenko

et al. 2021

E3S Web Conf.

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“…Objectives of the control strategy are to smooth the power production whilst balancing the absorbed energy and stabilisation of floating platform to keep it operationally functional and under safe conditions. The BGF energy production control for the combined system exploits the R&D already developed ( [12], [13], [14], [15], [16]), and it is optimised by modelling different control strategies acting on both wind turbine and WECs. Outcomes are then compared in terms of power output smoothness and platform displacements, on the basis of site resources wind turbine & WEC devices characteristics.…”

Section: Figure 8 the Blue Growth Farm Data Analytics Processmentioning

confidence: 99%

New Engineering Approach for the Development and Demonstration of a Multi-Purpose Platform for the Blue Growth Economy

Lagasco

Collu

Mariotti

et al. 2019

Volume 6: Ocean Space Utilization

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Aquaculture is currently the fastest growing food sector in the world and the open oceans are seen as one of the most likely areas for large-scale expansion [1], [2], [3]. The global demand for seafood is continuing to rise sharply, driven by both population growth and increased per capita consumption, whilst wild-capture fisheries are constrained in their potential to produce more seafood. A recently funded EC project, the Blue Growth Farm – BGF (GA n. 774426, 1st June 2018 – 30th September 2021) aims at contributing to this world need with an original solution. The Blue Growth Farm proposes an efficient, cost-competitive and environmentally friendly multi-purpose offshore farm concept. It is based on a modular floating structure, moored to the seabed, meeting requirements of efficiency, cost-competitiveness and environmental friendless, where automated aquaculture and renewable energy production systems are integrated and engineered for profitable applications in the open sea. In the present paper, the overall engineering approach developed to carry out the research work is presented, described and justified. Different technical and scientific challenges are addressed through an integrated industrial engineering design approach, where all disciplines are tuned to achieve the Blue Growth Farm main targets. These are represented by: i) guaranteeing expected nominal fish production thanks to advanced automation and remote control capabilities; ii) minimizing the pollution introduced at marine ecosystem level when exploiting the marine natural resources, whilst increasing the social acceptance and users community agreement; iii) maximizing the electricity production in the Blue Growth Farm potential installation area ecosystem to provide energy supply to the on-board electrical equipment and to dispatch the extra produced electric energy to the land network. Preliminary engineering design results are promising to demonstrate effective increase of safety and efficiency by reducing on-board human effort and consequently risks at offshore, thus to make commercial-scale open ocean farming a reality. The present paper introduces overall concepts and design methodology whilst other companion works submitted at OMAE2019 [4], [5], [6] provide insight of specific aspects of the Blue Growth Farm project elaborated during the first six months activity.

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“…Such undesired motions reduce the aerodynamic efficiency , shorten the fatigue life of tower and increase stresses on blades, rotor shaft, yaw bearing and tower base [11]. Therefore, it is important to restrain the FOWT's platform motions within an adequate range [12].…”

Section: Introductionmentioning

confidence: 99%

Switching Control Strategy for Oscillating Water Columns Based on Response Amplitude Operators for Floating Offshore Wind Turbines Stabilization

et al. 2021

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In this article, a new strategy for switching control has been proposed with the aim of reducing oscillations in floating offshore wind turbines. Such oscillations lead to a shortage in the system’s efficiency, lifespan and harvesting capability of wind and wave energies. In order to study the decreasing of undesired oscillations in the system, particularly in pitch and top tower fore-aft movements, a square-shaped platform barge equipped with four symmetric oscillating water columns has been considered. The oscillating water columns’ air flux valves allow to operate the air columns so that to control the barge movements caused by oscillatory motion of the waves. In order to design the control scheme, response amplitude operators have been used to evaluate the performance of the system for a range of wave frequency profiles. These response amplitude operators analysis makes it possible to implement a switching control strategy to adequately regulate the valves opening/closing transition. The obtained results show that the proposed controlled oscillating water column-based barge present a better performance compared to the traditional barge one. In the case study with the period of 10 s, the results indicate the significant oscillation reduction for the controlled oscillating water column-based system compared to the standard barge system by 30.8% in pitch angle and 25% in fore-aft displacement.

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A symbiotic approach to the design of offshore wind turbines with other energy harvesting systems

Cited by 30 publications

References 44 publications

Features of functional dependence of random phenomena and values in social being in conditions of its unstability (the environmental position)

Features of functional dependence of random phenomena and values in social being in conditions of its unstability (the environmental position)

New Engineering Approach for the Development and Demonstration of a Multi-Purpose Platform for the Blue Growth Economy

Switching Control Strategy for Oscillating Water Columns Based on Response Amplitude Operators for Floating Offshore Wind Turbines Stabilization

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