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- Journal Article:
Murray et al.
The National Renewable Energy Laboratory manufactured, instrumented, and deployed thermoplastic composite blades and a data acquisition system (NDAQ) on one of Verdant Power’s Gen5d 5 m diameter tidal turbines in New York’s East River. The thermoplastic blades had internal strain gages, and the NDAQ was a stand-alone system for monitoring and recording the strain…
- Conference Paper:
Henry et al.
This paper describes a series of experiments undertaken to investigate the slamming of an Oscillating Wave Surge Converter in extreme sea states. These two-dimensional experiments were undertaken in the Wave Flume at Ecole Centrale Marseille. Images from a high speed camera are used to identify the physics of the slamming process. A single pressure sensor is used to record the characteristic…
- Journal Article:
Cai et al.
Ocean energy is an underutilized renewable energy source compared with hydropower and wind power. Therefore, the development of economical and efficient wave energy converters (WECs) is important and crucial for offshore power generation. The mooring tensioner is a critical device that can be used in point-absorber-type WECs, semisubmersible floats for oil and gas drilling, and floating wind…
- Conference Paper:
Kelly and Alam
The ocean is full of untapped energy, however it is a wild place where harsh conditions can occur that can damage wave energy converters (WEC’s). During high load conditions, many WEC’s must go into survival mode to prevent damage or are overdesigned to continue operating in high sea states, which can increase capital costs. The authors propose a different approach, where geometry control is…
- Thesis:
Brown
Ocean wave energy is a new and developing field of renewable energy with great potential. The energy contained in one meter of an average wave off the coast of Newport Oregon could supply dozens of homes with electricity. However, ocean waves are usually quite irregular which leads to large bursts and lulls in the power available for extraction. These bursts and lulls generate large cyclic…
- Conference Paper:
Mundon and Rosenberg
This paper details the development of a survival strategy for the Oscilla Power Triton Wave Energy Converter. This work was completed as part of a DoE project to reduce the costs of wave energy. We investigated a number of different approaches to managing the extreme loads in the Triton system which are described herein. A primarily numerical approach was taken to evaluate the relative…
- Report:
de Andres et al.
The Anaconda technology is based on the propagation of internal bulge-waves through a flexible, water-filled tube. The tube is intended to sit just below the water surface and is aligned perpendicular to the oncoming wave front (Figure 1). Dynamic pressure variations applied to the flexible tube by incident ocean waves change the cross-section of the tube at frequencies which initiate an…
- Report:
Lingwall et al.
Polycrystalline diamond (PCD) bearings were designed, fabricated and tested for marine-hydro-kinetic (MHK) application. Bearing efficiency and life were evaluated using the US Synthetic bearing test facility. Three iterations of design, build and test were conducted to arrive at the best bearing design. In addition life testing that simulated the starting and stopping and the loading of real…
- Journal Article:
Sjökvist and Göteman
The focus of this paper is the survivability of wave energy converters (WECs) in extreme waves and tsunamis, using realistic WEC parameters. The impact of a generator damping factor has been studied, and the peak forces plotted as a function of wave height. The paper shows that an increased damping decreases the force in the endstop hit, which is in agreement with earlier studies. However,…
- Thesis:
Xie
The traditional failure modes and effects analysis (FMEA) is a conceptual design methodology for dealing with potential failures. FMEA uses the risk priority number (RPN), which is the product of three ranked factors to prioritize risks of different failure modes. The three factors are occurrence, severity, and detection. However, the RPN may not be able to provide consistent evaluation of…
- Journal Article:
Glennon et al.
Tidal energy has seen a surge of interest in recent years with several companies developing technology to harness the power of the world’s oceans where the operational capacity in Europe was over 11 MW in 2020. One such developer is the partnership of SCHOTTEL Hydro (Germany) and Sustainable Marine (UK) who have developed a scalable multi-turbine device equipped with 70 kW turbines and capable…
- Report:
Quoceant Ltd
The PELs suite of simulation programs was continuously developed by PWP over the 17 year lifetime of the project. The programs use a variety of formulations adaptable to the task at hand, with respect to the computational effort and levels of detail required for modelling rigid bodies connected by a controlled joint
This report discusses the following topics:
- Significant and…
- Report:
AWS Ocean Energy
The purpose of this report is to provide a description of the current design for the Electric Eel and to provide a TRL assessment of the major sub-systems, together with an assessment of AWS Ocean Energy’s confidence of achieving TRL 9 for that system. The report also provides an assessment of the overall TPL of the system.
This information is intended to provide a snap-shot of the…
- Report:
AWS Ocean Energy
The report was produced in August 2015 and reviews the experience of AWS Ocean Energy Ltd from May 2004 to the time of writing. It also references the earlier experiences gained from the work by Teamwork Technology (Netherlands) in the initial development of the Archimedes Waveswing™ in the period from 1994 to 2004.
The report is intended to give an overview of the development…
- Report:
Wave Energy Scotland
This overview report has been prepared by Wave Energy Scotland (WES), and is intended as a brief guide to the contents of the reports produced for WES by AWS Ocean Energy as part of Project Know-How.
Project Know-How is part of the on-going knowledge capture work within WES and was commissioned to capture lessons, knowledge and key operational experiences from the wave energy sector in…
- Journal Article:
Sjökvist and Göteman
Although a tsunami wave in deep sea can be simulated using linear shallow water theory, the wave dynamics of a tsunami running up a continental shelf is very complex, and different phenomena may occur, depending on the width and profile of the shelf, the topography of the coast, incident angle of the tsunami and other factors. How to simulate tsunami waves at an intermediate depth is studied…
- Presentation:
Abdellatef et al.
As rotary power take-offs (PTO) are showing promising advantages for commercial wave energy converters (WECs), especially as rope elements are replaced with composite polyurethane-steel tension belts, the service life predictions of the PTO are becoming a major concern in design. Using belts instead of ropes for winching elements is shown to improve Cyclic Bend Over Sheave (CBOS) performance…
- Presentation:
Duvoy et al.
We introduce a methodology for a comprehensive characterization of river flows from transects surveyed at different times over near coincident transects from acoustic Doppler current profiler (ADCP) data acquired from a moving vessel.
The ADCP measurements are first rotated from East and North velocities into primary and secondary flows that are projected onto a grid of points on an…
- Presentation:
Murdy
The Marine Energy Advanced Materials project addresses the barriers and uncertainties facing marine renewable energy developers in using composite materials for load-bearing structures. Sponsored by the U.S. Department of Energy’s Water Power Technologies Office, the multiyear project comprises of collaborators from the National Renewable Energy Laboratory (NREL), Sandia National Laboratories…
- Report:
Cerebreon Technologies
In 2015, Aquamarine Power Limited (APL), developer of the Oyster 1 and Oyster 800 wave energy converters, went into administration and their intellectual property (IP) was acquired by Wave Energy Scotland Limited (WES).
The IP contained a significant body of information from exploratory, small-scale tank tests completed during the company’s trading history. This information exists…
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