Wave-to-Wire Model of an Ocean Wave Energy Converter
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A complete dynamic modelling of ocean wave energy converter with a set of methodology, energy storage and performance analysis
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This document discusses the Pelamis wave energy converter. It describes the construction of the Pelamis, which consists of articulated tube segments linked by hinged joints that move with ocean waves. The power conversion module contains hydraulic rams, accumulators, and a motor/generator that convert wave motion into electricity. The Pelamis operates by using wave motion to drive hydraulic rams, which pump high-pressure oil to power the generator. Key features include survivability in rough seas and a rapid maintenance system. The Pelamis has been installed in wave farms off the coasts of Portugal and Scotland.
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define the wave energy
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2) Portugal has pursued wave energy research focused on oscillating water columns and has developed the first grid-connected wave power plant in 1999.
3) Currently, there are over 50 wave energy projects globally utilizing various technologies, but the field is still in an early prototype stage with high costs compared to wind energy. Further cost reductions are needed for wave energy to compete commercially.
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The document summarizes information about ocean wave energy, including:
1) It outlines different wave energy conversion systems such as oscillating water columns (OWCs) and overtopping, discussing their components and efficiencies.
2) OWCs can be improved by optimizing damping to reduce power losses and larger, deeper installations can lower costs by increasing available energy and reducing capital expenditures.
3) Costs for various renewable technologies like wave, solar, wind and biomass are compared, showing wave energy's high density but current higher costs than other options.
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Wave energy originates from the sun heating the earth's surface and creating winds that transfer energy to ocean waters, generating waves. As waves travel vast distances across oceans, the longer and stronger the wind blows, the higher, longer, faster, and more powerful the waves become. Three main types of wave energy conversion devices interact with ocean waves to harness the kinetic energy for electricity: offshore devices dealing with swell, near shore devices capturing maximum wave amplitude, and embedded devices receiving breaking waves along shorelines. Examples of technologies include Pelamis machines that generate power from wave rolling motions and oscillating water columns that use wave pumping of air to drive turbines. Significant wave energy resources exist off coasts between 30-60 degree latitudes, and
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Tidal power, sometimes called tidal energy, is a form of hydropower that exploits the rise and fall in sea levels due to the tides, or the movement of water caused by the tidal flow. Because the tidal forces are caused by interaction between the gravity of the Earth, Moon and Sun, tidal power is essentially inexhaustible and classified as a renewable energy source.
Tidal power can be classified into two types. Tidal stream systems make use of the kinetic energy from the moving water currents to power turbines, in a similar way to underwater wind turbines. This method is gaining in popularity because of the lower ecological impact compared to the second type of system, the barrage. Barrages make use of the potential energy from the difference in height (or head) between high and low tides, and their use is better established.
NCES Wave Plant
Ocean wave machine is rotated by wave energy. Wave machine drives the generator rotor, pump to store the water at high level, compressor to store the air in compressed air storage plant. Here it is presented the different method to harness wave energy.
General objective
discuss the various ocean energy sources
interpret the energy transformation in wave energy conversion
discuss the working of various type wave energy plant
Specific objectives
define the wave energy
write benefits and application of wave energy system
explain the types of wave energy plant
sea snakes to create electricity
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Ocean waves are a huge, large untapped energy source, which is a considerable renewable energy source that can generate the useable energy forms. This review introduce the general status of wave energy and evaluate the device types that represent current wave energy converter (WEC) technology which defer according to the location, type and the modes of operation, power take off (PTO) methods Benefits and the challenges that have to face during the ocean wave power generation. Ocean wave energy power can contribute to the Sri Lanka power crisis. Wave climate and geographical construction around the country and best places to establish the wave energy power plant in the Sri Lanka and available technologies. Social and environmental impact of wave power plant.
Tidal and wave energy
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This document discusses ocean wave energy and methods for converting it to electrical energy. It describes how ocean waves are formed by wind interacting with the water's surface. There are three main types of wave energy converters: float-type converters that use rising and falling buoys, dolphin-type converters that use rolling and heaving motions, and oscillating water column converters where water rises and falls inside a chamber to drive air through a turbine. While wave energy is a renewable resource, challenges include designing durable equipment to withstand ocean conditions and transporting the energy to shore.
Root locus
A root locus plot is simply a plot of the s zero values and the s poles on a graph with real and imaginary coordinates.
This method is very powerful graphical technique for investigating the effects of the variation of a system parameter on the locations of the closed loop poles.
Wave energy
The Pelamis Wave Energy Converter is a technology that uses the motion of ocean waves to generate electricity. It consists of cylindrical sections linked by hinged joints that capture the energy from waves moving the joints. As the joints move with the waves, hydraulic rams and motors drive electrical generators to produce electricity. Several Pelamis devices can be connected together via subsea power cables to transmit electricity to shore. The technology is proposed for use in India to help meet growing electricity demand.
pelamis wave energy convertor ppt
Pelamis Wave Power is the world's first commercial-scale machine to generate electricity from offshore wave energy. It consists of cylindrical sections linked by hinged joints that resist waves to pump high pressure oil and drive electrical generators. Each 120m long Pelamis machine is rated to produce 750KW and provides enough power for 500 UK homes annually. While it has advantages of proven technology and low maintenance, concerns include potential disturbance of marine life and high replacement costs if damaged. Overall, wave energy has potential to combat climate change by displacing fossil fuels and protecting the environment for future generations.
Ocean Energy ( wave enrgy, tidal energy, OTEC
There are three basic ways to tap the ocean for its energy. We can use
The ocean's waves.
The ocean's high and low tides .
Temperature differences in the water.
1-Wave Energy
Kinetic energy (movement) exists in the moving waves of the ocean. That energy can be used to power a turbine. The wave rises into a chamber. The rising water forces the air out of the chamber. The moving air spins a turbine which can turn a generator.
When the wave goes down, air flows through the turbine and back into the chamber through doors that are normally closed.
2-Tidal Energy
Two types of tidal plant facilities.
Tidal barrages
Tidal stream generator
Ocean Energy
Ocean energy harnesses energy from waves, tides, salinity gradients, and ocean thermal differences and has the potential to be a large renewable energy source. It accounts for around 0.1% of global energy production currently but could be developed further. There are two main categories - thermal energy from the sun's heat in surface waters and mechanical energy from tides and waves. Examples of technologies under development include wave farms using turbines on shorelines or floating devices offshore, as well as tidal barrages and tidal stream generators. While ocean energy has advantages of predictability, it also faces challenges of high costs and environmental impacts that need addressing for fuller commercial development.
Chapter 8 Root Locus Techniques
The document discusses root locus techniques for analyzing control systems. It begins with an overview and objectives of root locus analysis. It then defines the root locus and describes how to sketch a root locus by determining the starting and ending points, branches, symmetry, behavior at infinity, and real axis segments. The document provides examples of using properties of root loci to find breakaway and break-in points, asymptotes, and the frequency and gain at imaginary axis crossings.
Wave Power
Sea waves have high energy densities, the highest among renewable energy sources with the natural seasonal variability of wave energy following the electricity demand in temperate climates securing energy supplies in remote regions.
Build Features, Not Apps
Presented at Tokyo iOS Meetup https://www.meetup.com/TokyoiOSMeetup/events/234405194/
Video here: https://www.youtube.com/watch?v=lJlyR8chDwo
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reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
ACEP Magazine edition 4th launched on 05.06.2024
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
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Wave-to-Wire Model of an Ocean Wave Energy Converter
- 1. Wave-to-Wire Model and Energy Storage Analysis of an Ocean Wave Energy Hyperbaric Converter AUTHORS Edson H. Watanable; Senior Member, IEEE Jose Paulo Vilela Chunha; Member, IEEE Presented By: Md. Jakir Hossain Course No: EE 4130 Roll No: 1003033 Electrical and Electronic Engineering; KUET
- 2. OUTLINES Title and Content Layout with List Dynamic Modeling of WEC • Mathematical Modelling of the Accumulator • Proposed Model for Generating Unit Energy Storage Analysis Simulation of Proposed Wave-to-Wire Model • Illustration of the Performances Evaluation of the Dynamic Behavior of the System
- 3. Schematic of the WEC Title and Content Layout with List Fig1: Schematic of the wave energy converter PTO : Power Take-Off WEC : Wave Energy Converter INPH : National Institute of Waterways Research
- 4. INPH Sea-state Occurrence Data Title and Content Layout with List Fig2: Sea-state occurrence at Port of Pecem, Brazil Wave Height (Hs) Between 1 and 1.75m; 90% Higher than 2m; 20% Peak Wave Period (tp) Range of 5-7s; 90% Range of 12-20s; 20%
- 5. Wave-to-Wire Model Title and Content Layout with List Fig3: Basic block diagram of the wave-to-wire model Pw = kwHw 2tw kW kw = (ρg2/32π) × 10-3 kg/m/s4 Pw = Power of the incident wave train Hw = wave height tw = wave period
- 6. Accumulator Model Title and Content Layout with List Fig4: Small-scale pumping modules at LabOceano Fig5: Schematic representation of the hydropneumatic accumulator Ṗc = ϒmgRgTg[ (Qi - Qo) / (VT - Va)ϒ+1 ]
- 7. Generating Unit Model Title and Content Layout with List Fig6: Equivalent electric circuit of the synchronous generator (a) d-axis and (b) q-axis Fig7: synchronous generator circuit (a) rotor and stator in the dq frame and (b) stator connected to a three-phase load
- 8. Fluctuations of Simulation Parameters Title and Content Layout with List
- 9. Simulation Results Title and Content Layout with List Fig8: Simulation results: Pumping unit variables and variables and mechanical power for the islanded system and connected system
- 10. Simulation Results Title and Content Layout with List Fig9: Simulation results: Generating unit variables for the islanded system Fig10: Simulation results: Generating unit variables for connected system
- 11. Conclusions A complete mathematical wave-to-wire model is presented The main subsystems of the converter were described The dynamic models were integrated to evaluate storage of the system A model for the generating unit was proposed Simulation of the proposed model (1:10) were presented Smoothing of system output using energy storage devices The output electrical power was found to be 14 ± 0.0022% kW The output terminal voltage is found to be 380 ± 0.001% Volt
- 12. Title and Content Layout with List Thank You