Floating Wind Turbines and Floating Bridges (COEE&FB)
For Wave Energy Extraction Calculation Program and Prototype, Kindly scroll to end of this page and download the file.
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1.The inventors have the following contributions to the offshore renewable energy extraction systems. A total of eight (8) patents had been granted or pending as follows:
1.Renewable energy wave pumps, 1-patent granted.
2.Coordinated Offshore Energy Extraction (COEE) system; wave, tidal, wind, solar and deep sea cold water (SWAC) as a medium for air conditioning, 4-patents pending.
3.Floating wind turbine foundations and floating bridges, 3-patents pending.
We did not invent the hot water; but rather used my education, design/construction, project management experience and available information to investigate existing renewable energy systems using available equipment and materials with proven record of quality and performance to develop a viable coordinated system.
The Renewable Energy Wave Pump (REWP) was patented by the USPTO on June 24, 2008.
Continuous improvements were made to the (REWP) develop a Direct Drive Wave Pump with extraction of additional offshore energy sources, that led to the development of a “Coordinated Offshore Energy Extraction system, (COEE&FB) namely; wave, tidal, solar, wind, deep sea cold water and thermal energy sources.
Waves are an important source of renewable energy. A comprehensive review of more than one hundred existing wave energy extraction systems did not show a viable and economical system that is capable of withstanding the test of simplicity, resist storms and hurricanes, constructability, economy, efficiency and scalability.
There are four kinds of wave energy extraction systems: 1) Point absorbers, 2) Attenuators, 3) Oscillating wave surge converters and 4) Oscillating water column.
Point Absorbers use floating buoys at the surface of the water move up and down following wave undulations. These devices capture energy only from a wave front greater than the physical dimension of the device. The up/down vertical motions of ocean waves provide the mechanical power to drive an electrical generator.
Point Absorber technology was chosen to develop and improve wave energy extraction. The problem of extracting energy only during the front side of the wave cycle, neglecting energy extraction from the lee side of the wave leads to reduced efficiency and results in rippled power output.
The wave energy extraction system is based on simple engineering principles that can be easily verified as to economy, to ripple free power output and for connection to the public electric utility network.
The undulating movement of the buoyant float is used to directly convert this up/down motion into rotary motion using; a continuous pull line, a pull reversing pulley located below the wave trough line and a power pulley located above the wave crest to directly drive a water pump in one direction using sprag-type freewheeling clutches. The water pump lifts small quantity of water from low head, (wave height) to a much higher head, collects it in a closed circuit piping system and feeds it to a hydro-turbo generator. This is a direct wave drive novelty that no one had developed.
Power ripple is compensated for by using an air/water reservoir partially filled with water to provide high pressure air storage during the front side of the wave cycle and discharge the high pressure water from the air/water reservoir into the closed circuit piping system during the lee side of the wave cycle; thus waiving the need for fly wheels to store energy. This is a novelty that no one had developed.
A Floating Construction Unit (FCU) moored to the sea bed is used to provide dry space to house and support the wave energy extraction, the hydro-turbo generator and system controls. The (FCU) resists storms and hurricanes, is of modular construction, assembled at the shoreline, floated and towed to site ready for installation and operation.
Lee side Wave energy extraction is solved by adding vertical shrouds to a hydro-turbine located below the wave trough to drive a water pump located at the dry deck of the (FCU) to pump high pressure water into the closed circuit piping system.
Using the (FCU) as a floating support to extract other offshore renewable energy sources would lead to a coordinated energy extraction system with lower costs per generated Kilo-Watt Hour.
Tidal energy extraction is achieved by further adding horizontal shrouds to the lee side hydro-turbine to guide water flow through the hydro-turbine to give unidirectional rotation. This rotation is transferred to a water pump installed at the dry deck of the (FCU) to pump water into the closed circuit piping system; thus extracting tidal energy. Using one hydro-turbine to extract energy from the lee side of the wave and from tidal currents is another novelty.
Solar PV cells are installed at the already provided roof of the floating (FCU) unit. Related control equipment is installed in the housing of the floating (FCU).
Wind Turbines are installed offshore due to higher speed winds compared to wind speeds at land, high land costs, necessity for access roads, environmental considerations, birds’ safety, obstruction to wind flow, noise and other considerations.
Foundations for offshore wind turbines are expensive to manufacture and install. They require heavy lift equipment, deep sea bed penetration, jacketing plus many other items. Imagine four hundred (400) ton equipment is installed into the wind turbine nacelle at a height of 135 meters above the sea bed, (80 m blade radius, 15 m clearance and 40 m water depth).
The “Floating Construction Unit” (FCU) that supports wave, solar and tidal energy extraction systems is already provided and measures 27x22 meters by 30 meters deep. It supports five 1-meter diameter shrouded hydro-turbines, 10-sets of water pumps, each consisting of 4-water pumps in line with the wave.
For low height wave energy extraction, the respective buoyant floats are successively increased by ten percent (10%), and reducing the buoyant float height to keep the total uplift per buoyant float constant at 2,605 kilo-grams.
Floating wind turbine foundations are easily developed by staggering the (FCU) units and adding fixed floats below the trough line of the wave, to give a foot print of 54x154 meters (2x27 m length by 7x22 meters). This is another novelty, an efficient and simple way of providing floating wind turbines.
Floating Bridges are easily developed by further adding fixed floats below the trough line of the wave. Covering the floating bridge would obscure the wind turbines to traffic, would improve safety, scenic view and would relocate the solar system from the (FCU) roof to the roof of the floating bridge. This is another novelty of providing a Coordinated Offshore Energy Extraction system; wave, tidal, solar, floating wind turbines and floating bridges (COEE&FB).
The (COEE&FB) system is versatile, can also be used for deep sea cold extraction for air conditioning, and to provide cold water for salmon fish farms, for thermal energy extraction and as an access bridge to islands.
Two additional advantages are provided by Use of.
New design variable speed generators as manufactured by VSG-USA
To best serve the local authorities, it is necessary to cooperate with local consultants, developers and contractors. For this, we are looking for cooperation with local entities to develop and execute the COEE&FB system.