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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…
- Thesis:
Gwenter
Marine renewable energy is a continually growing topic of both commercial and academic research sectors. While not as developed as other renewable technologies such as those deployed within the wind sector, there is substantial technological crossover coupled with the inherent high energy density of water, that has helped push marine renewables into the wider renewable agenda. Thus, an ever…
- Thesis:
Diab
Energy conversion systems for renewable energy rely on mechanical gearboxes to transmit mechanical power to the electrical machine at higher speeds and to avoid having very large generators. The main issue with mechanical gears is their low reliability and requirement for regular lubrication and maintenance. Magnetic gears perform power transmission between two ports through the frictionless…
- Journal Article:
Rowell et al.
For marine hydrokinetic energy to become viable, it is essential to develop energy conversion devices that are able to extract energy with high efficiency from a wide range of flow conditions and to field test them in an environment similar to the one they are designed to eventually operate in. FloDesign Inc. developed and built a mixer-ejector hydrokinetic turbine (MEHT) that encloses the…
- Journal Article:
Dewhurst et al.
A two-dimensional mathematical model was developed to predict the dynamic response of a moored, floating platform mounting a tidal turbine in current and waves. The model calculates heave, pitch, and surge response to collinear waves and current. Waves may be single frequency or a random sea with a specified spectrum. The mooring consists of a fixed anchor, heavy chain (forming a catenary), a…
- Journal Article:
Tay
When waves pass through a channel, wave elevation is observed to increase, a phenomenon known as wave runup. Attempts are made to utilize the wave runup along a channel supported on a floating platform to enhance the energy generation from the array of point absorber wave energy converters (PA-WECs). Such floating platforms could be integrated into the floating breakwater, floating pier, or…
- Conference Paper:
Junianto et al.
A floating tidal current power plant may be used to extract near-surface tidal current velocity into electricity. To capture energy from the tidal current which changes direction, a vertical axis tidal current turbine is needed. And, to increase capacity, tidal current turbines are arranged in multi-system. This power plant consists of multi-turbines, electrical systems, and a floating…
- Presentation:
Jamaleddin et al.
Marine renewable energy is poised to advance the Blue Economy through providing power to several industries and specialized markets. With the Biden administration vision of 30 GW by 2030 from offshore wind, the deployment of marine hydrokinetic (MHK) energy devices and offshore wind turbines (OWT) on a shared anchoring configuration provides several advantages. The Department of Energy…
- Conference Paper:
Roach et al.
The ocean is both a precious resource for coastal communities and a vast source of largely untapped renewable energy that can help combat climate change. This presents a unique opportunity for wave energy converters (WEC) to provide both utility-scale and small-scale electricity for resilient, energy-efficient communities that can better withstand the effects of climate change. Designing a WEC…
- Journal Article:
Tan et al.
The transportation of seawater on a grand scale via an ultra-large cold-water pipe situated within the context of ocean thermal energy conversion (OTEC) floating installations inherently presents challenges associated with instability and potential malfunction in the face of demanding operational circumstances. This study endeavors to augment the stability and security of cold-water pipe (CWP…
- Conference Paper:
Dhanak et al.
A prototype low-flow (~0.5 m/s) marine current turbine for deployment from a small unmanned mobile floating platform has been developed at Florida Atlantic University for autonomously seeking and harnessing tidal/coastal currents. The support platform is an unmanned surface vehicle (USV) in the form of a catamaran with two electric outboard motors and with capabilities for autonomous…
- Journal Article:
Wang et al.
The successful operation of a large-diameter cold water pipeline installation is crucial for harnessing the potential of ocean thermal energy conversion. However, there is a shortage of research focused on mechanical performance analysis during installation. This study establishes a pipeline response analysis model based on a nonlinear beam theory to elucidate the underlying mechanical…
- Journal Article:
Habib et al.
In this study, a Finite Element Model (FEM) was developed to analyse the stability of an Ocean Thermal Energy Conversion (OTEC) Cold Water Pipe (CWP). The general equation describing the pipe dynamics was adapted from a previous study and modified to consider the non-linear drag force. The flow field and change in the flow direction were imposed by varying the coefficient of…
- Conference Paper:
Guachamin-Acero and Portilla-Yandun
A Wave Energy Converter (WEC) cannot operate efficiently if left alone floating to the mercy of the random sea surface. Moreover, high waves may impose destructive forces while contributing nil energy production in return. For a WEC to be efficient, its natural frequency should be close to the peak frequency of a wave spectrum. At the resonance or another lower natural frequency, dynamic…
- Conference Paper:
Arredondo-Galeana et al.
In this work, we compare the motion and structural response of a rigid and hinged floating structure subject to regular waves. We do this to understand better whether what is the best option for floating marine renewable installations. The hinged structure has two hinges and three pontoons, whilst the rigid structure is made by replacing the hinges with rigid steel bars. We instrument the…
- Conference Paper:
Kennedy et al.
The SEASNAKE project - an OceanERA-NET project – is aiming for developing fully dynamic cables for ocean energy. Through new design and application of novel coatings the project is designing a dynamic cable that better suits the conditions and user requirements. In order to fully understand the benefits, the Wave Venture TEMPEST™ techno-economic analysis software will be used to simulate the…
- Journal Article:
Domino and Horne
An unstructured, low-Mach, balanced-force, volume of fluid methodology is coupled to an implicit, six-DOF overset formulation for the simulation of wave-based renewable energy devices. We propose an overlapping unstructured mesh construct that affords a wave energy converter (WEC) geometry to move freely about a background domain. A control volume finite element (CVFEM) numerical…
- Journal Article:
Shoukat et al.
While the world continues to grapple with the increasingly prominent impact on the planet of climate change, a shift towards greater reliance on renewable energy sources is observed. Wind, hydro and solar have seen a rise in uptake, however, tidal energy represents massive untapped potential. For tidal energy to become economically viable, focus must shift towards designing efficient yet…
- Journal Article:
Nasab et al.
This paper aims to design an integrated offshore structure capable of supporting a hybrid assembly of one wind plus two tidal turbines. The monopile has been found to be a suitable foundation type as the most inexpensive solution in water depths of less than 30 m. The Cook Strait in New Zealand is an ideal location for wind and tidal renewable energy sources due to its strong winds and tidal…
- Journal Article:
Chen and Lam
Marine energy sources are able to make significant contributions to future energy demands. Marine current has huge potential to supply renewable energy as compared to the other energy sources. Marine environment is harsh for the installation and operation of marine current turbine (MCT). Seabed scour around marine current turbine is induced when the flow suppression occurs at the seabed.…
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