Wave energy conversion energizing offshore aquaculture: Prospects along the Portuguese coastline

Clemente, Daniel; Rosa-Santos, Paulo; Ferradosa, T.; Taveira-Pinto, Francisco

doi:10.1016/j.renene.2023.01.009

Cited by 24 publications

(2 citation statements)

References 37 publications

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“…Wave energy, one of the typical ocean energy resources, has advantages such as better availability, greater predictability, and higher energy density [7]. Wave energy can provide electricity support for island communities, ocean observation instruments, aquaculture activities [8,9], and hydrogen production and desalination [10], exhibiting vast application potential.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism

Qin,

Zhang,

Song

et al. 2024

JMSE

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In order to enhance the power generation efficiency and reliability of wave energy converters (WECs), an enclosed inertial WEC with a magnetic nonlinear stiffness mechanism (nonlinear EIWEC) is proposed in this paper. A mathematical model of the nonlinear EIWEC was established based on the Cummins equation and the equivalent magnetic charge method, and the joint simulations were carried out using MATLAB/Simulink 2020 and AMESim 2020 softwares. The effect of the magnetic nonlinear stiffness mechanism (NSM) on the performance of the EIWEC system was investigated. The results show that the nonlinear negative stiffness property of NSM can significantly improve the motion response and output power of EIWEC under low-frequency waves. Compared to EIWEC without NSM (linear EIWEC), nonlinear EIWEC has a higher generation efficiency and wider frequency bandwidth. Additionally, the effects of linear spring, internal mass body, and hydraulic power take-off (PTO) system parameters on the energy conversion capability of the system were analyzed to provide a reference for the design of nonlinear EIWECs. In general, the proposed nonlinear EIWEC could provide good development potential for the scale utilization of wave energy resources.

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Section: Introductionmentioning

confidence: 99%

Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism

Qin,

Zhang,

Song

et al. 2024

JMSE

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“…(19) N EW roles for wave energy converters are emerging with the development of the blue economy, namely off-grid battery chargers or generation units in dc microgrids [1] . Upcoming applications include sensor platforms for scientific or surveillance purposes [2], charging stations for unmanned underwater vehicles [3], and real-time monitoring and automation of offshore aquaculture farms [4]. Additionally, small-scale off-grid power generation can be used as a preliminary stage for utility-scale production.…”

mentioning

confidence: 99%

Permanent Magnet Generator Testing for Low-Power Off-Grid Oscillating Water Column Wave Energy Converters

Ferreira,

Gato,

Henriques

2024

IEEE Trans. Energy Convers.

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This work concerns the development of an offgrid oscillating-water-column wave energy converter (WEC) equipped with internal batteries designed for powering sensors and autonomous vehicles. Calculating the generator counter torque from electrical measurements is advantageous due to mechanical constraints with torque meters in sea-faring prototypes. Mapping generator performance concerning load and speed enables advanced wave-to-wire modeling for controller and battery charger design. Experimental testing involved the WEC's permanent magnet generator, diode rectifier, and capacitive filter across combinations of rotational speeds and resistive loads, yielding the generator-rectifier electromechanical input-output relationship. This relationship yielded a steady-state efficiency with differences below 1% to measured values for representative loads, and it reproduces time series of the modeled variables in speed-varying conditions with good accuracy. Some drawbacks of passive rectification, compared to active, were assessed. The power factor ranged from 0.92 to 0.95, and generator-rectifier efficiency ranged from 0.83 to 0.93 over the range of 20 to 100% of the generator's continuous duty torque. Additionally, the maximum observed direct-axis current reached 8% of the demagnetization limit. Finally, the highest observed generatorrectifier efficiency of 91% occurred at the maximum tested speed of 3000 r/min.

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AquaBreak Project: A Nature-Based Solution Towards Food Demand and Coastal Protection

Miranda,

Proença,

Fonseca

et al. 2024

Structural Integrity

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Wave energy conversion energizing offshore aquaculture: Prospects along the Portuguese coastline

Cited by 24 publications

References 37 publications

Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism

Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism

Permanent Magnet Generator Testing for Low-Power Off-Grid Oscillating Water Column Wave Energy Converters

AquaBreak Project: A Nature-Based Solution Towards Food Demand and Coastal Protection

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