Lap report for compression test. If the frequency of a transverse wave is changed, does wavelength, wave speed, or both wavelength and wave speed change? How do changes in amplitude affect wavelength and wave speed?
Its unique ability to extract and convert energy from both the rising and falling of waves, represents a technological breakthrough. A wave energy conversion apparatus comprises at least two deviceseach comprising a surface floatat least one of the surface floats being rigidly attached to a submerged body.
The movement between the at least two devices preferably effects an energy generation which is harnessed by the linkages. The apparatus may also include mooring systems that maintain the complete apparatus in a position that is consistent with statutory requirements and not significantly inhibit its efficient operation.
As the demand for electricity is forecasted to increase, there is an urgent need to find new methods to extract electric energy from renewable sources.
Renewable electric energy supply is today one of the highest priorities in many parts of the world. The Kyoto declaration and the last agreement at Marrakech are significant proof of this.
Both the EU and the US have set their targets on future greenhouse emissions. Ocean waves represent a vast unexplored source of renewable energy. However, these estimations depend on assumptions of technology and energy cost. The actual resource could be a magnitude larger. In any case, it will be a challenging task to convert the vast energies in the ocean waves into electric energy.
When approaching sustainable electric power production for the future, attention must be paid to the economical constraints. The social, ecological and environmental impacts also needs to be adressed. The need for research and investigations in this area must not be underestimated.
Today, several countries have national efforts within wave energy. From the mid eighties the area has been considered difficult and uneconomical. The device is pumping water up and down, thereby driving a traditional generator. The ocean waves behaviour have been the objectives for many investigations.
However, apart from some tests, mechanical solutions with a traditional rotating generator 1, r. Most of the projects remain in the research stage, but a substantial number of plants have been deployed in the sea as demonstration schemes. Several ways of classifying wave energy devices have been proposed, based on the energy extraction method, the size of the device and so on.
A group of devices, classified as Point Absorbers, appears to have the approach a performance where commercial exploitation is possible.
Available Energy from the ocean Potential Energy: Point absorber driven linear generator 2. Floating wave energy extractor 1. However, renewed activities has been reported from England and the Netherlands. Furthermore, recent electromagnetic simulations, revile a neglected opportunity.Moving waves have momentum when a wave is absorbed or reflected by and object, the wave pushes on that object.
Velocity: It takes time for a wave to go from one place to another.
Electromagnetic waves are a form of energy waves that have both an electric and magnetic field. Electromagnetic waves are different from mechanical waves in that they can transmit energy and travel through a vacuum.
Sound wave in air (and any other fluid medium) is a longitudinal wave because particles of a fluid medium through which a sound wave moves oscillate parallel according to its direction. For example, a vibrating string creates longitudinal waves.
Mechanical waves are waves that require a medium for the transfer of their energy to occur. Water waves are an example of mechanical waves. Tsunami waves released after an earthquake transfer the energy of the quake to distant shorelines. Mechanical waves are divided into three categories: Transverse waves, longitudinal waves, and surface waves.
In transverse waves, the medium moves perpendicular to the wave direction, and in longitudinal waves, the medium moves parallel to the wave direction. Explore the wonderful world of waves! Even observe a string vibrate in slow motion.
Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator.