OCEAN WAVE ENERGY CONVERTERS: OVERVIEW, LEGAL AND ECONOMIC ASPECTS, AND DIRECT-DRIVE POWER TAKE-OFF (original) (raw)
Related papers
Ocean wave converters: State of the art and current status
2010 IEEE International Energy Conference, 2010
Solutions to today energy challenges need to be explored through alternative, renewable and clean energy sources to enable a diverse energy resource plan. An extremely abundant and promising source of energy exists in oceans. Ocean energy exists in many forms. Among these forms, significant opportunities and benefits have been identified in the area of ocean wave energy extraction, i.e., harnessing the wave motions and converting them into electrical energy.
A review of wave energy converter technology
Ocean waves are a huge, largely untapped energy resource, and the potential for extracting energy from waves is considerable. Research in this area is driven by the need to meet renewable energy targets, but is relatively immature compared to other renewable energy technologies. This review introduces the general status of wave energy and evaluates the device types that represent current wave energy converter (WEC) technology, particularly focusing on work being undertaken within the United Kingdom. The possible power takeoff systems are identified, followed by a consideration of some of the control strategies to enhance the efficiency of point absorber-type WECs. There is a lack of convergence on the best method of extracting energy from the waves and, although previous innovation has generally focused on the concept and design of the primary interface, questions arise concerning how best to optimize the powertrain. This article concludes with some suggestions of future developments.
Evaluation of Methods to Enhance the Ocean Wave Energy Convertor Performance
Ocean energy represented by waves is considered as a one of the renewable energy sources. This study aims to evaluate the methods that enhancing the ocean wave energy convertor performance. The mechanism of wave energy convertor is by converting mechanical energy to an electricity energy using DC generator and running by the pulling of wire due to ocean wave movement. Moreover, the test and analyze of converting the wave energy to electricity are conducted. Firstly, the role of numerical modelling lies in fabricating the tested rig in addition to study and analyze the buoyancy and stability in fluid mechanics as results of converting the kinetic energy derived from sea waves into rotational energy. The experimental tests were achieved locally at the Arabic gulf-South of Iraq/Basra (Khor Alzubayr). the tests were performed in two cases named: after happening the tidal (tested in one direction) and at the increasing of the sea water (tested in bidirectional). The results of local tests (at the sea) show that the maximum power of test was recorded value about 68 W in case of happening the tidal with an increase percentage of 92.6% over the case of bidirectional. These findings encouraging for more investigation in the methods that could increase energy harvesting from ocean waves since it is an enormous amount of energy.
Ocean Wave Energy Converters: Analysis, Modeling, and Simulation. Some case studies
Renewable energy & power quality journal, 2022
Wave energy has much more potential and benefits than other forms of renewable energy. It is more predictable, consistent, and controllable than wind or solar energy. In this way, an adequate infrastructure can be an alternative and also sustainable system for power supply. In this paper, different wave energy conversion mechanisms (buoys, Pelamis, and oysters) have been described. These models are implemented and simulated using the Design Modeller, ANSYS-AQWA, and WEC-SIM applications. The purpose has been to develop a complete simulation of the wave energy converter and discuss its operation. The analysis has been developed in Matlab-Simulink and both regular and irregular waves have been considered. For this, an approximation to the linear waves theory has been used. The results obtained indicate the energy absorbed from the sea waves and also the energy supplied to the power grid. The simulation results estimated with the different WEC models are comparable to the results shown by other research papers.
Planning and Development of Ocean Wave Energy Conversion
At the beginning of the 21st century, global environmental problems, including global warming, were attracting attention worldwide. In these circumstances, momentum is building across the world for the effective utilization of clean and renewable natural energy sources. The ocean is the world's largest collector and storage medium for solar energy. At the same time, it produces various forms of energy while interacting with the atmosphere. Wave energy is an indirect and condensed form of solar energy. Wave gathers their energy from the wind. Wave gather, store and transmit this energy thousands of kilometers with little loss. As long as sun shines, wave energy will never be depleted. It varies in intensity, but it is available throughout the day and year.
A U T H O R Economic and Social Benefits from Wave Energy Conversion Marine Technology
This paper summarizes the energy resource, the energy conversion technology, and the economic and social benefits of using wave energy technology. The Electric Power Research Institute (EPRI) estimates that the U.S. wave resource potential that could credibly be harnessed is about 6.5% of the 2004 U.S. national electricity energy demand (the total 2004 demand was about 4,000 TWh). Wave energy conversion (WEC) is an emerging technology; ten WEC devices have been tested to date in natural waters worldwide over the past 10 years. The economic opportunities are significant. A relatively minor investment by government in the public good today could stimulate a worldwide industry generating billions of dollars of economic output and employing thousands of people, while using an abundant and clean natural resource to meet our energy needs. Wave energy is potentially more easily assimilated into the grid (compared to wind and solar) because it may be more accurately predictable two to three days ahead and sold as firm power. Given proper care in siting, deployment, operations, maintenance and decommissioning, wave power promises to be one of the most environmentally benign electrical generation technologies. The primary barrier to the development and use of these technologies in the U.S. is the cumbersome regulatory process. We recommend and encourage the development of an effective regulatory system that fosters the application of this environmentally friendly electricity generation technology for our society.
With the increase in the demand of electrical and the oncoming predicted energy crises due the shortage of thermal driven plant fuels, it is inevitable to choose for a sustainability approach in order to provide for the shortcomings in the given scenario. Ocean Wave Energy is one of the proposed approaches, which of course can utilize the immense Wave motion of oceans and convert it into electrical energy for other purposes . Ocean Wave energy Power Take off systems vary greatly from one another, Power take of Systems are in development and many design has been proposed , not a universally acceptable design has yet been chosen. This paper provides an up-to-date review of the status of ocean wave energy technology and identifies some of the key barriers challenging the development of ocean wave energy. The current devices in use a feasibility study , A study the effects of coastline on wave power absorption, a full scale model , describing here a linearized theory of an oscillating water column (OWC) installed on a straight coast will be taken in account and The future development of ocean wave energy devices is discussed as well as examining the importance of a supportive policy to assist development.
Wave energy converters and their impact on power systems
2005 International Conference on Future Power Systems, 2005
The objective of this paper is to give an introduction into ocean wave energy converters and their impact on power systems. The potential of wave energy is very large. There are a lot of different methods and systems for converting this power into electrical power, such as oscillating water columns, hinged contour devices as the Pelamis, overtopping devices as the Wave Dragon and the Archimedes Wave Swing. The main characteristics of these wave energy converters are discussed. A lot of research, development and engineering work is necessary to develop the experimental systems into reliable and cost-effective power stations. The wide variety of systems makes it difficult to say general things about power quality. However, the large variations of output power are a common problem. Whether this can be solved by using wave farms has to be investigated further.
Economic and Legal Aspects of Ocean Wave Energy Conversion
2006
With the recent advent of commercial ocean wave energy projects, there is no clear economic model or legal process for developers to follow. This report focuses on wave energy business and legal jurisdiction issues. These issues are addressed with regards to siting license dilemmas, which government agencies may assert jurisdiction, economic / business incentives for renewables, and wave energy economic factors. This report also investigates regulatory actions and incentive programs needed to promote wave energy conversion technology. All topics are discussed from the view point of an engineer on the subject of making emerging technologies such as wave energy converters successful.