Results 31 to 40 of about 147,233 (294)

Performance Evaluation of Wide-Angle Ultrathin Microwave Metamaterial Absorber with Polarization Independence

open access: yesAdvanced Electromagnetics, 2018
A novel dual-band wide-angle ultra-thin absorber composed of dual closed-concentric ten-point stars with polarization independence is presented in this article. The ten-point stars formed resonators are engraved on low cost FR4 substrate. The EM absorber
K. P. Kaur, T. Upadhyaya
doaj   +1 more source

Dynamics of Heaving Buoy Wave Energy Converters with a Stiffness Reactive Controller

open access: yesEnergies, 2020
Heaving buoy wave energy converters (WEC) are floating oscillators, commonly modeled as single-degree-of-freedom vibrating systems. As the wave frequencies change according to the sea state, these devices must be controlled to maximize energy absorption.
Ahmed H. Sakr   +2 more
doaj   +1 more source

Exploring the Potential for Increased Production from the Wave Energy Converter Lifesaver by Reactive Control

open access: yesEnergies, 2013
Fred Olsen is currently testing their latest wave energy converter (WEC), Lifesaver, outside of Falmouth Bay in England, preparing it for commercial operation at the Wavehub test site.
Marta Molinas   +3 more
doaj   +1 more source

Investigation of Vertical Slamming on Point Absorbers [PDF]

open access: yesVolume 6: Nick Newman Symposium on Marine Hydrodynamics; Yoshida and Maeda Special Symposium on Ocean Space Utilization; Special Symposium on Offshore Renewable Energy, 2008
This paper focuses on the impact of vertical slamming on floating point absorber systems and the associated pressures that might be expected when these phenomena occur. In a first part it will be shown how the occurrence probability of slamming can be reduced by implementing a slamming restriction, i.e.
Griet De Backer   +4 more
openaire   +1 more source

Model Predictive Control of a Wave Energy Converter with Discrete Fluid Power Power Take-Off System

open access: yesEnergies, 2018
Wave power extraction algorithms for wave energy converters are normally designed without taking system losses into account leading to suboptimal power extraction.
Anders Hedegaard Hansen   +2 more
doaj   +1 more source

Surface wave control for large arrays of microwave kinetic inductance detectors [PDF]

open access: yes, 2017
Large ultra-sensitive detector arrays are needed for present and future observatories for far infra-red, submillimeter wave (THz), and millimeter wave astronomy.
Baryshev, Andrey M.   +10 more
core   +2 more sources

A Flexible Chain Proposal for Winch-Based Point Absorbers

open access: yesJournal of Mechanical Design, 2018
Ocean wave power is a promising renewable energy source. It has, however, been difficult to find a cost-effective solution to convert wave energy into electricity. The harsh marine environment and the fact that wave power is delivered with large forces at low speed make design of durable mechanical structures and efficient energy conversion challenging.
Andersson, Kjell   +2 more
openaire   +3 more sources

Random walks with absorbing points

open access: yesDiscrete Applied Mathematics, 1992
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Design and Optimization of a Point Absorber for the Mediterranean Sea

open access: yesVolume 8: Ocean Renewable Energy, 2022
Abstract In the last few years, a wide range of Wave Energy Converter (WEC) have been designed. Among the most interesting technologies for multiple applications, there is the point absorber: if on one hand, these devices guarantee a limited energy production, on the other hand, they ensure good performances, do not require complex ...
Ghigo, Alberto   +3 more
openaire   +1 more source

Cost-Based Design and Selection of Point Absorber Devices for the Mediterranean Sea

open access: yesEnergies, 2018
Sea wave energy is one of the most promising renewable sources, even if relevant technology is not mature enough for the global energy market and is not yet competitive if compared with solar, wind and tidal current devices.
Vincenzo Piscopo   +3 more
doaj   +1 more source

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