A nonlinear generalized predictive control scheme for the oscillating water column plants

Article Engineering, Marine

Experimental investigation of a novel OWC wave energy converter

Tongshun Yu et al.

Summary: This study presents the feasibility of a recently patented wave energy converter (WEC) through a series of experiments. The results indicate that increasing the front wall draught in the high-frequency zone greatly reduces the overall efficiency of the system, and the opening ratios of the individual chambers significantly affect the overall hydrodynamic performance. The optimal efficiency was achieved at an opening ratio of 1%.

OCEAN ENGINEERING (2022)

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Article Engineering, Marine

Potential of performance improvement of a modified Wells turbine using passive control for wave energy conversion

Ahmed T. M. Kotb et al.

Summary: The study focuses on the impact of Gurney flap geometry and Reynolds number on Wells turbine performance to increase power output. Results show that a circular cavity in a rectangular Gurney flap achieves the highest increase in torque coefficient, making it the best option studied. Additionally, increasing Reynolds number delays stall inception, enhances torque coefficient, total pressure loss coefficient, and efficiency of Wells turbine with conventional and flapped blades.

OCEAN ENGINEERING (2021)

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Article Mathematics

Performance Analysis on the Use of Oscillating Water Column in Barge-Based Floating Offshore Wind Turbines

Payam Aboutalebi et al.

Summary: This article proposes a new barge platform structure for Floating Offshore Wind Turbines (FOWT) to reduce undesired platform motions by installing Oscillating Water Columns (OWC) to counteract wave oscillations; Response Amplitude Operator (RAO) is used to predict system motions under different wave frequencies, with simulations showing the positive impact of added OWCs on system stability.

MATHEMATICS (2021)

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Article Engineering, Marine

Optimization of Wells turbine performance using a hybrid artificial neural fuzzy inference system (ANFIS) - Genetic algorithm (GA)

Ali Mahrooghi et al.

Summary: The study found that adding guide vanes, endplates, or end rings significantly improved the performance of Wells turbines. Using ANFIS-GA-CFD for optimization of design variables further enhanced efficiency, torque coefficient, and reduced pressure drop coefficient. The optimal blade increased efficiency by up to 18%, torque coefficient by up to 8%, and reduced pressure drop coefficient by almost 3.45% compared to previous models.

OCEAN ENGINEERING (2021)

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Article Chemistry, Multidisciplinary

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

Payam Aboutalebi et al.

Summary: A new switching control strategy is proposed in this article to reduce oscillations in floating offshore wind turbines by controlling barge movements through oscillating water columns, resulting in improved performance in reducing pitch angle and fore-aft displacement for the controlled oscillating water column-based system compared to the standard barge system.

APPLIED SCIENCES-BASEL (2021)

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Article Engineering, Marine