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- Book Chapter:
Majumdar et al.
India being a tropical country, has a large ocean thermal gradient available throughout the year that can be utilized to extract energy. This energy can be used to power a Low-temperature thermal desalination (LTTD) plant using the Ocean Thermal Energy Conversion (OTEC) method. OTEC works at a very low pressure, and developing a low-pressure turbine for OTEC is very challenging. The turbine…
- Book Chapter:
Tavakoli et al.
Hydrokinetic energy contains the major uncontrolled source of renewable marine energy. The highest level of converter technology readiness offered in the last three decades is TRL8–9, which is related to the first-generation horizontal axis converters. In low-depth calm waters, one of the best options to harvest tidal energy is vertical axis turbines. About 16% of the…
- Book Chapter:
Boccotti
The chapter starts with the flow equations inside a U-oscillating water column. These equations are integrated numerically with the wave pressure β Δp(t) on the outer opening of the plant (Δp(t) is the wave pressure at a vertical breakwater, and β is a factor whose value is obtained with the solution of Chapter 15). The chapter resorts to design sea state and quasi-determinism theory for the…
- Book Chapter:
Kara
The current development pace of wave energy converters indicates the possibility of the deployment of these converters as arrays at commercial scale. The accurate predictions of wave loads, motion characteristics, and power requirements are critically important for the design of these devices which are in sufficiently close proximity to experience significant hydrodynamic interactions. The…
- Book Chapter:
Ettema et al.
Floating tidal turbine systems have seen increasing popularity in recent years with floating devices designed to reduce installation and maintenance costs. This paper investigates whether the necessary buoyancy aids can also be used as a tidal fence sidewall to improve the hydrodynamic performance of the turbines. Following a numerical design process, an experimental investigation was…
- Book Chapter:
Zheng et al.
A submerged elastic plate can work as a plate–wave energy converter (WEC) to capture wave power provided that piezoelectric layers are bonded to both faces of the flexible substrate. In this paper, the performance of a piezoelectric plate is investigated. The plate–WEC is simulated by a submerged elastic disk, which can be either simply supported or clamped at the edge. A theoretical model…
- Book Chapter:
Orekan and Zhang
This chapter presents theoretical analysis of the Smart-WEC at different wave conditions (regular and irregular waves). The Smart-WEC is a new type of point absorber wave energy converter that stores energy from the waves and form a completely self-contained, persistent, energy source platform suitable for powering distributed ocean systems (e.g., AUV). Power generated is then transferred…
- Book Chapter:
Vijayasankar and Samad
In this article, we present the numerical analysis performed on a compact mechanical-based direct drive wave energy converter (WEC), in order to improve its performance on longer wave periods. For this work, the numerical modeling of the point absorber is done with the help of an open-source code written in MATLAB, WEC-Sim and the hydrodynamic parameters of the WEC are determined using the BEM…
- Book Chapter:
Jaksic et al.
The structural design of marine tidal turbine blades is governed by the hydrodynamic shape of the aerofoil, extreme loadings and composite material mechanical properties. The design of the aerofoil, chord and twist distribution along the blade is generated to optimise turbine performance over its life time. Structural design gives the optimal layout of composite laminae such that ultimate…
- Book Chapter:
bin Mat Saad and bin Azman
Oscillating water column (OWC) is one of optional renewable energy device that been used for converting kinetic energy from waves energy into electrical energy. Suitable structural design must be measured and determine to make sure structure is capable to resist wave load. The scope of the research is to design of closed structure of OWC. A model has been set up in Ansys AQWA and Ansys Static…
- Book Chapter:
Xiros and Dhanak
The purpose of this chapter is to present the basic concepts of ocean wave energy conversion as an extension to the supporting subjects presented earlier in this handbook so that they can be useful to scientists, engineers and inventors. Although new research regarding all wave energy conversion aspects has been unveiling continuously over the past few decades and is expected to remain so in…
- Book Chapter:
Karimirad
In the previous chapters, the loads and load cases important for offshore energy structures are discussed. To assess the functionality and structural integrity of a design, it is needed to predict the motion and structural responses. A reliable and robust design should be based on accurate calculation of loads and responses. Offshore energy structures are complicated, respect to the dependency…
- Book Chapter:
Ravindran and Abraham
Ocean thermal energy conversion (OTEC ) utilizes the thermal gradient available in the ocean to operate a heat engine to produce work output. Even though the concept is simple and old for almost one century, during last three decades, it has gained momentum due to worldwide search for a clean, continuous energy source to replace the fossil fuels. There are technological hurdles to overcome to…
- Book Chapter:
Bernitsas
Marine hydrokinetic (MHK ) energy is clean, renewable, and available worldwide. It comes in two forms: vertical in waves and horizontal in currents, tides, and rivers. Apart from a few major ocean currents, most of the ocean currents have flow speeds less than 3 kn and most rivers have speeds less than 2 kn, making harvesting of their MHK energy by steady-lift technologies (turbines)…
- Book Chapter:
Liu et al.
This chapter mainly introduces the development and prospect of turbines utilized in ocean thermal energy conversion (OTEC), including brief introduction, aerodynamic design, mechanical and electric control system, problems, and prospect of the turbine in OTEC. At the beginning, the first section mainly introduces compositions and types of turbine in OTEC systems, different working fluids in…
- Book Chapter:
Rony et al.
A submerged tension-leg-platform for offshore wind turbine combined with a heaving type point absorber wave energy converter is analysed considering different configurations of array of wave energy converters. A time domain simulation is performed for the combined platform using fully coupled aero-hydro-servo-elastic simulation. The analysis is performed to study the effect of different…
- Book Chapter:
Kamarlouei et al.
The objective of this paper is to present the experimental methodologies and challenges of testing a wave energy converter array, concentrically attached to a semisubmersible platform, and in presence of wind thrust forces and moments. The tower of a wind turbine has been placed in the center of the platform and connected to a mass-pulley system through a light weight cable to simulate the…
- Book Chapter:
Etter
This chapter describes the utilization of underwater acoustic models for the evaluation of marine-system noise impacts associated with the installation and operation of marine-hydrokinetic energy (MHK) devices, particularly in coastal oceans. Coastal environments are generally characterized by high spatial and temporal variabilities, which make them very complex acoustic environments.…
- Book Chapter:
Roshanmanesh et al.
Tidal energy is still a developing renewable energy source with only a few commercial projects having been commissioned to date. Although there are several different device designs that have been proposed and investigated for harvesting tidal energy, most of them have only been tested either at model or small scale. A handful of designs have managed to gather sufficient financial support to be…
- Book Chapter:
Polagye
The acoustic characteristics of marine energy converters are of interest to those attempting to quantify their environmental effects at larger scale. Such efforts are complicated by the time variation in marine energy converter sound caused by changes in the environmental forcing and converter operation, the difficulty of identifying marine energy converter sound amidst background noise from a…
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