BY: M.Sri Pavan And Sabarish.Y

Department of Electronics and Communication

NON-CONVENCTIONAL ENERGY SOURCE

“WAVE ENERGY”

WHY OCEAN ENERGY ??

Waves

Waves are a concentrated form of solar energy

Technology to convert wave energy to electrical energy is in its beginning phase

> 1000 Patents

< 2 MW Install

Introduction to Wave Energy

New forms of Energy are required !

•1799: First patent of a device designed to use ocean waves to generate power.• 1910: First oscillating water column was built by Bochaux-Praceique to power his house•1940s: Yoshio Masuda experimented with many concepts of wave power•2004: Wave power was delivered to an electrical grid for the first timeIt is estimated that if 0.2% of the ocean’s untapped energy could be sufficient for the entire world.harnessed, it could provide power •Compared to Other Renewables, Wave Energy Advantages:•Higher energy density, availability (80 – 90%) and predictability

•Energy of interchanging potential and kinetic energy in the wave•Cycloidal motion of wave particles carries energy forward without much current•Typical periodicities are one to thirty seconds, thus there are low-energy periods between high-energy points

Wave Structure

Wave Energy

Wave Energy Potential

Potential of 1,500 – 7,500 TWh/year 10 and 50% of the world’s yearly electricity demand IEA (International Energy Agency)

200,000 MW installed wave and tidal energy power forecast by 2050 Power production of 6 TWh/y Load factor of 0.35 DTI and Carbon Trust (UK)

“Independent of the different estimates the potential for a pollution free energy generation is enormous.”

WORLD WIDE POTENTIAL WAVE ENERGY…

Production of electricity through wave energy

Sea wave energy has the highest concentration of renewable energy.

Wave energy contains roughly 1000 times the kinetic energy of wind. Hence it allows smaller and less conspicuous devices to produce power

Theoretically you can extract 40 MW of power per km of coast where there are gentle waves (say 1 M height) and 1000 MW per km of coast where the wave height is 5M.

SONAR

SONAR  is a technique that uses sound propagation (usually underwater, as in Submarine navigation) to navigate, communicate with or detect other vessels

 Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. 

 The term sonar is also used for the equipment used to generate and receive the sound.

 The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extremely high (ultrasonic). The study of underwater sound is known as underground water acoustics or hydroacoustics.

French F70 type frigates (here, La Motte-Picquet) are fitted with VDS (Variable Depth Sonar) type DUBV43 or DUBV43C towed sonars

Ocean energy bionics

BioPower Systems is developing a new ocean energy technology in Australia that will use bionics to mimic natural systems in order to produce energy. Both bioSTREAM and bioWAVE technologies use biomimicry, which refers to the adaptation of biological traits in engineered systems. BioPower Systems has copied many of the beneficial traits from natural systems in the development of the new ocean energy conversion systems.

BIO WAVETMThe bioWAVETM is being developed for utility-scale power production from ocean waves. Its nature-inspired design (biomimicry) combines high conversion efficiency with the ability to avoid excessive wave forces, enabling supply of grid-connected electricity at a competitive price How It Works

The bioWAVETM is mounted on the seafloor, with a pivot near the bottom. The array of buoyant floats, or "blades", interacts with the rising and falling sea surface (potential energy) and the sub-surface back-and-forth water movement (kinetic energy). As a result, the pivoting structure sways back-and-forth in tune with the waves, and the energy containedin this motion is converted to electricity by an onboard self-contained power conversion module, called O-DriveTMThe O-DriveTM contains a hydraulic system that converts the mechanical energy from this motion into fluid pressure, which is used to spin a generator. Power is then delivered to shore by a subsea cable

BioSTREAMtmIt combines high conversion efficiency with the ability to continuously align with the current directionThe bioSTREAMTM employs a patented oscillating hydrofoil system to extract energy from moving water. For sites that have a peak current speed of 2.5m/s

The ability to streamline and weathervane during periods of excessive flow allow for low-cost construction and competitive generation cost per MWh. A 250kW bioSTREAMTM

•New and innovative wave energy devices

Ocean wave energy can be captured directly from surface waves. Blowing wind and pressure fluctuations below the surface are the main reasons for causing waves.

But consistency of waves differs from one area of ocean to another.

Some regions of oceans receive waves with enough uniformity and force. Ocean waves contain tremendous energy.

Currently scientists and companies are considering exploiting the wave power of oceans to harness clean and green energy

Next Generation Wave Energy Converter•It was UK-based wave energy developer, Aquamarine Power

•This renewable energy generator, which produces electricity from ocean waves, builds on the original Oyster 1 device•It can easily generate power and install,maintain

Advantages Of Wave Energy

•One of the advantages of wave energy is that there are several methods to harness it. One such method uses a large chamber with a small hole in the top. Waves come into the chamber and hit the wall. As the chamber gets more full of water, air is pushed up through the hole in the top of the chamber. This air spins a turbine, generating electricity.

•It can be made a floating device tethered with cables/chains to piles driven to the sea bottom. •Cost of energy produced is cheap and competitive to conventional sources of energy. •A 500 KWH unit having 2 nos X 250 KW on either side could be factory made and installed in sea.

Disadvantages Of Wave EnergyAll of that said, there are several disadvantages of wave energy that should be considered. For example, waves are not one of the most constant things in nature. Although there are always some form of waves, there is a lot of variety in how powerful those waves are throughout the year, month, and even each day. This makes it hard to estimate exactly how much electricity each wave power plant can produce each day.

Another thing to consider is that many sites are not suitable for wave energy plants. Locations that have strong waves on a regular basisare the best candidates for a plant, but those types of areas are limited in number.

Some of the current designs of wave power plants are relatively noisy. Experts usually don't consider this a major problem though, because the ocean's waves are fairly noisy in general so they somewhat drown out the noise created by the generator.

Conclusion:

Wave energy is one of the important renewable energy sources which can replace a Non –renewable sources.

Wave is energy is used to produce eletricity and many more

Thank

you