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- Journal Article:
Zhou et al.
Wave energy and ocean current energy are considered stable, reliable, and highly predictable renewable energy sources. The development of ocean current energy conversion technology is crucial in addressing power shortages. However, the low velocity of most ocean currents worldwide, typically less than 1.5 m/s, poses a challenge for traditional ocean current energy capture devices. Current…
- Journal Article:
Lee et al.
The present paper deals with the investigation of the flow distribution in the ocean current power park in order to optimize the arrangement of the turbine generators in the sea and the lake sides. To produce more reliable results, the detailed geometry of the ocean current generators is included in the computational domain with frozen rotor method to consider rotating effect. The numerical…
- Journal Article:
VanZwieten et al.
The development of a numeric simulation for predicting ocean current turbine performance is presented in this paper along with performance predictions. This numeric model uses an unsteady blade element momentum (BEM) rotor model to calculate the rotor forces and seven degree-of-freedom (DOF) equations of motion to calculate the coupled effects between the rotor and the main body. For the…
- Conference Paper:
Driscoll et al.
Florida is faced with an energy crisis with respect to capacity, supply, cost, emissions, and stability. The untapped energetic waters of the Florida Current could provide a clean, reliable, base-load local renewable energy source for Florida. To facilitate the successful commercial harvesting of this hydrokinetic resource, Florida Atlantic University's Center for Ocean Energy Technology is…
- Conference Paper:
Mahfuz and Akram
Design, analysis and life prediction of a composite ocean current turbine (OCT) blade has been investigated. Loading on a turbine blade under Gulf Stream in South Florida location (26° 4.3N 79° 55W) at 50 meter depth is considered. Ocean current is random in nature and it varies with respect to time. This variation further intensifies if turbulence is added. In addition, change in velocity…
- Conference Paper:
Zhou et al.
Design, analysis and lifetime prediction of a horizontal axis ocean current turbine (OCT) composite blade has been investigated. Loading on a turbine blade under the Gulf Stream in South Florida location (26° 4.3N 79° 55W) at 25 meter depth is calculated and evaluated by using AeroDyn. Static analysis is performed by using NuMAD and ANSYS. Accumulated fatigue damage modeling is employed as a…
- Journal Article:
Xiros and Kaise
This paper presents a generally applicable approach to numerical thermal design. A novel thermal design procedure for the prediction of heat transfer inside a pressure vessel of an ocean current turbine using integrated procedure by finite element method of heat transfer analysis, artificial neural network and genetic algorithms is presented. Numerical heat transfer analysis was done using…
- Journal Article:
Kirinus et al.
The continuous growth of the world population increases the demand and competition for energy, requiring an immense effort for nonrenewable energy sources availability. Application of marine currents for electricity generation could offer a distinct advantage over other renewable energy sources due to the regular and predictable nature of the resource. Therefore, in addition to promoting the…
- Journal Article:
Tsao et al.
This is the second of three papers that propose and study a new concept of mooring turbine generators with the aim of resolving key difficulties in realizing ocean current power generation. The concept of Cross-stream Active Mooring (CSAM) features a hydro sail system that allows deployment of generator turbines, from anchoring points on shore or on shallow seafloors, across current stream to…
- Journal Article:
Baheri et al.
In this paper, we present an online approach for optimizing the 3D layout of a reconfigurable ocean current turbine (OCT) array. Unlike towered turbines, most OCT concepts for Gulf Stream energy harvesting involve tethered systems. The replacement of towers with tethers provides the opportunity for OCTs to adjust their locations within some domain by paying out/in tether to adjust depth and…
- Journal Article:
Hassanzadeh et al.
The numerous benefits of Savonius turbine including simplicity in structure, appropriateness of its self-start ability, operating in relatively low velocity, independency from flow direction and its low environmental burdening have caused the Savonious to gain momentum in recent Marine Current Turbine research. However, the turbine suffers from low efficiency as compared with other water…
- Thesis:
Pusapati
Hydrokinetic energy, a relatively new kind of renewable energy, can be generated from flowing water in rivers or oceans. Hydrokinetic turbines (HKTs) are a major system for hydrokinetic energy, and the reliability of the HKTs is critical for both their lifecycle cost and safety. The objective of this work is to apply advanced methodologies of reliability analysis and reliability-based design…
- Book Chapter:
Meyer et al.
The potential for energy extraction from the fast-flowing Agulhas Current along South Africa’s East Coast is examined. Potentially suitable regions are evaluated using state-of-the-art satellite remote-sensing, predictive modelling, and in situ observation technologies. A mid-shelf location (91 m depth) and an offshore location (255 m depth) at approximately 32.51°S and 28.83°E are evaluated…
- Book Chapter:
Haas et al.
Ocean basin scale wind-driven currents provide a possible source of renewable energy using ocean turbine technology to convert kinetic energy of the flow to electricity. The Gulf Stream System in the North Atlantic Ocean is part of one of the largest subtropical gyres in the world. Within these gyres, the western intensification due to the Coriolis force produces some of the largest and most…
- Book Chapter:
Lowcher et al.
There has been global interest in renewable energy for meeting energy demands, and as these demands increase, it will become of greater importance to utilize low-carbon energy sources to mitigate anthropogenic impact on the environment. Onshore hydropower is responsible for half of the electricity generated by a renewable source in the USA. In the ocean, marine hydrokinetic (MHK) energy in…
- Journal Article:
VanZwieten et al.
This paper investigates the possibility of using active individual blade pitch control for positioning moored ocean current turbines within an array. Using a numerical simulation of a representative ocean current turbine it is shown that harmonic blade oscillations with amplitudes of 1.5° can be used to displace an ocean current turbine laterally by a distance equal to one rotor diameter, when…
- Journal Article:
Kolekar and Banerjee
An optimization methodology for a stall regulated, fixed pitch, horizontal axis hydrokinetic turbine is presented using a combination of a coupled hydro-structural analysis and Genetic Algorithm (GA) based optimization method. Design and analysis is presented for two different designs: a constant chord, zero twist blade, and a variable chord, twisted blade. A hybrid approach is presented…
- Journal Article:
Ben Elghali et al.
This paper deals with the development of a Matlab - Simulink model of a marine current turbine system through the modeling of the resource and the rotor. The simulation model has two purposes: performances and dynamic loads evaluation in different operating conditions and control system development for turbine operation based on pitch and speed control. In this case, it is necessary to find a…
- Conference Paper:
Polagye et al.
The predictability of tidal currents in the context of hydrokinetic power generation are assessed using current data from a series of surveys in Admiralty Inlet, Puget Sound, Washington, USA. Both current speed and kinetic power density are shown to be well-described by harmonic analysis. Three challenges to predictability are identified. First, non-sinusoidal fluctuations over time scales on…
- Journal Article:
Pyakurel et al.
This paper forms, optimizes, and evaluates three numerical approaches for characterizing mean velocities in far wake region behind ocean current turbines. These approaches are derived from wake models originally developed for wind turbines and are referred here as the Larsen/Larsen, Larsen/Ainslie, and Jensen/Ainslie approaches based on the researchers originally credited with developing the…
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