Green Energy











Solar Power

Solar Water Heaters


Wind Power



Tidal Power


Tidal Barrages


Wave Power

















Solar Power











The Gemasolar Power Plant near Seville in southern Spain


World's first Solar Power Station that generates Electricity at Night


It looks like a giant art project. But this symmetrical, circular pattern of mirrored panels is the world's first solar power station that generates electricity at night. The Gemasolar Power Plant near Seville in southern Spain consists of an incredible 2,650 panels spread across 185 hectares of rural land.
The mirrors - known as heliostats - focus 95 per cent of the sun's radiation onto a giant receiver at the centre of the plant. Heat of up to 900C is used to warm molten salt tanks, which create steam to power the £260m station's turbines. But, unlike all other solar power stations, the heat stored in these tanks can be released for up to 15 hours overnight, or during periods without sunlight.



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World's largest Solar-Powered Building - Dezhou, Shangdong, China


China, constantly straddling the line between super-polluter and clean tech pioneer, has unveiled what for the time being is the world’s largest solar-powered office building . The fan-like roof of the 800,000 square-foot facility located in Dezhou in Shangdong Province was cleverly designed to resemble an ancient sun dial, though rather than ticking off the passing hours, the building houses exhibition centers, research facilities, meeting and convention spaces and a hotel, all of which are powered by the hundreds of solar panels adorning its roof.

Read More About It






Solar Array in Space could provide all the World's Energy ??? - Article


Lately we've been hearing a lot about alternative ways of generating electricity, and the idea of a solar power-gathering satellite sounds like the best plan yet. Its proponents say an orbital power station placed in a position where it's constantly bathed in unfiltered sunlight could provide enough power to run the whole world seven times over. It would employ kilometer-wide solar panels, beaming the energy down to earth via microwaves.

Because of the rising costs of energy, the idea of launching a huge solar-power satellite has become more practical within the past five years. The proposed 3000-ton behemoth, ten times heavier than the International Space Station, would require 120 launches to lift all its parts into orbit. Researchers estimate that even after overcoming that hurdle, the satellite could still pay for itself in a year after construction is complete. — Charlie White







Japan building enormous Solar Array to power Sharp's Plants - Article


In Japan, Sharp, the city of Sakai, and Kansai Electric Power are planning to build two absolutely enormous solar power plants, dubbed the "Sakai City Waterfront Mega Solar Power Generation Plan." The two plants will generate 10,000 kW and 28,000 kW, respectively. That's a lot of juice.

The complex will be one of the largest of its kind in the world, and it'll go a long way towards powering all of Sharp's and other company's factories in Sakai. Sakai is looking to become one of Japan's leading "green" cities, and judging by the huge investment they're making in solar power, they're certainly on the right track. Keep it up, Sakai!





General Motors building world's largest Rooftop Solar Power Array - Article


While the irony of harnessing solar power to build gas guzzling cars is hard to ignore, GM has become a world leader in the use of solar energy to power their factories. Now they have announced plans to install the world's largest rooftop solar array at their massive Zaragoza plant in northern Spain.

When completed at the end of September, the 85,000 panel system will cover about 2 million square feet of the roof to deliver 10 million watts, or enough to power around 4,600 households. That should be plenty to take care of the plant's energy needs, with any excess capacity being sold back to the local power company.

Let's just hope they plan to keep the green theme going by using the plant to build some of those 






World's largest Solar Array planned for the Sahara Desert - Article


The Sahara Desert gets a lot of sun. In fact, it gets so much that if a mere 0.3% of its area was used for a solar plant, it could power all of Europe. So it only makes sense that 20 German companies are looking into doing just that.

The plan would be to scatter solar collectors all across northern Africa in politically stable countries rather than putting them all in one spot. It'll take years to build everything as well as $555 billion in funds, but in the long run it'll be well worth it.






World's first Solar-powered City planned in Florida's Babcock Ranch - Article


What better place than the Sunshine State for the world's first solar-powered city? Called Babcock Ranch, the 17,000-acres-large community will have its energy needs supplied by a $300 million, 75 megawatt solar-powered generator. The city will also integrate a Smart Grid for powering electric vehicles.

While construction won't begin until later this year, Floridian city planners have some ambitious numbers for the solar community: 19,500 homes, 20,000 permanent jobs, 6 million square feet of retail/industrial space and 8,000 acres reserved for open space and greenways.

The biggest hurdle, though, may come after construction when it comes time to populate Babcock. It'll be interesting to see what kind of incentives city planners offer — electric vehicles aren't cheap, after all.






Shopping Mall Solar Power


Envision Solar Shopping Mall Video ( 2 mins)








Solar Powered Shopping with Solar Tracking Tree


We rent the airspace over parking lots from property owners and generate clean, renewable solar energy with our Solar Tracking Trees®. We then sell the energy produced by our Trees to the tenants of the property. Our Solar Tracking Tree® is a beautiful, solar parking canopy, mounted on a single column that tracks the sun, which does not cause any loss of parking.









Sharp Unveils See-Through Transparent Solar Panels Perfect For Balconies And Windows!


Rooftop solar installations are great for homeowners, or those with eco-conscious landlords – but what about the rest of us? Sharp recently announced a break-through in home solar technology that could begin to answer that question. The company unveiled a transparent solar panel that can be mounted on balcony railings or high-rise windows without obstructing the view.







Rawlemon’s Spherical Solar Energy-Generating Globes Can Even Harvest Energy from Moonlight


The solar energy designers at Rawlemon have created a spherical, sun-tracking glass globe that is able to concentrate sunlight (and moonlight) up to 10,000 times. The company claims that its ß.torics system is 35% more efficient than traditional dual-axis photovoltaic designs, and the fully rotational, weatherproof sphere is even capable of harvesting electricity from moonlight.

The ß.torics system was invented by Barcelona-based German Architect André Broessel. He sought to create a solar system that could be embedded in the walls of buildings so that they may act as both windows and energy generators. But the project isn’t only noteworthy for its solar efficiency capabilities - the ß.torics system is designed to generate lunar energy too!

The spheres are able to concentrate diffused moonlight into a steady source of energy. The futuristic ß.torics system is catching a lot of attention for its clean and beautiful design. (Despite solar power’s huge potential, we haven’t seen too many beautiful solar power technologies). We’re excited to see how architects will incorporate these energy generating orbs into alternative energy agendas and future building designs!







Off the Grid - Documentary 2012  ( 1 Hr. )


2012 Documentary by Alexander Oey

Alexander Oey traveled throughout the United States and filmed communities who are taking matters into their own hands. 50 of the 46 U.S. states are nearly bankrupt. Over 13 million Americans are unemployed. More than 49 million people live below the poverty line.

How was it able to come that far? People seek for their own Utopia outside the financial system and government. Are these communities the right path and solution? Has they found effective alternatives, while governments worldwide are heading to bankruptcy?

On  you will find the causes of the crises.







How to Live Off Grid - Book


Nick Rosen is an author, campaigner and award-winning documentary-maker. His latest book Off the Grid: Inside the Movement for More Space, Less Government, and True Independence in Modern America is published by Penguin Books and was released July 27, 2010.





A silicon solar cell or Solar Photovoltaic cell.



Solar Cells - Invention


The timeline of solar cells begins in the 19th century when it is observed that the presence of sunlight is capable of generating usable electrical energy. Solar cells have gone on to be used in many applications. They have historically been used in situations where electrical power from the grid is unavailable.


Definition of a Solar Cell - History of Solar Cells - Article


A solar cell is any device that directly converts the energy in light into electrical energy through the process of photovoltaics. The development of solar cell technology begins with the 1839 research of French physicist Antoine-César Becquerel. Becquerel observed the photovoltaic effect while experimenting with a solid electrode in an electrolyte solution when he saw a voltage developed when light fell upon the electrode.

Charles Fritts - First Solar Cell

According to Encyclopedia Britannica the first genuine solar cell was built around 1883 by Charles Fritts, who used junctions formed by coating selenium (a semiconductor) with an extremely thin layer of gold.


The Power of the Sun - The Science of the Silicon Solar Cell  ( 22 mins)


Explore the science of the silicon solar cell, currently the most important generator of solar electricity. [2/2008]


Solar Cells - How they Work ( 5 mins)


An explanation of how solar cells work. Suitable for an introduction to solar energy.




Build your own very high efficiency solar modules


High Power Solar Cells


History of Solar Cell 




Off the Grid Homes >>




















Solar Water Heaters




















- What is the power output of the Stirling engine? Is there somewhere to get a blueprint of this sterling so that it may be built by experimenters?





















































Wind Power














High Altitude Wind Harvesting

Estimating wind speed for different topographic locations & Altitudes


"Along with solar, wind represents the only renewable source of energy that is substantially larger

 than the world's current energy needs. Moreover, of all of the renewable energy technologies (wind, solar, tidal, hydroelectric, biomass, geothermal), high-altitude wind has the largest energy per square foot. Capturing a small fraction of the global high-altitude wind energy flux could be sufficient to

supply the current energy needs of the globe. Makani is developing high-altitude wind energy extraction technologies aimed at the most powerful wind resources."


In the atmosphere, the winds blow at different speeds at different altitudes. Unlike at the surface, the winds almost never stop blowing at the high altitudes used by science balloons that fly in the stratosphere. Free flight balloons drift along at whatever speed the wind is blowing at their operating altitude. These winds, which we can count on to keep blowing, blow at different speeds at different altitudes.







How it works:


The Sun heats our atmosphere unevenly, so some patches become warmer than others. These warm patches of air rise, other air blows in to replace them - and we feel a wind blowing. We can use the energy in the wind by building a tall tower, with a large propeller on the top. The wind blows the propeller round, which turns a generator to produce electricity.


We tend to build many of these towers together, to make a "wind farm" and produce more electricity. The more towers, the more wind, and the larger the propellers, the more electricity we can make. It's only worth building wind farms in places that have strong, steady winds, although boats and caravans increasingly have small wind generators to help keep their batteries charged. …


Click Here for More Details


Wind power explained ( 1 mins )

Cool wind power animation from Statkraft in Norway.




What's inside a wind turbine? ( 10 mins)

An overview of the layout of utility-class wind turbine generators - where are the major components, what do they do, and what differences can be found between models and size ranges.




Ecotricity - Bristol Port - Wind Turbine Construction Video ( 2 mins )

Watch our stunning time-lapse video of the construction of 3 wind turbines at Bristol Port.

The turbines will produce over 15 million units of new green electricity annually, enough to

save around 13,000 tonnes of carbon emissions every year for the next 30 years!









Wind Turbine Power System Sizing Calculator for the USA


· Determine the Wind Speed in Your Area

· Find out about Your Power Needs

· Review The Wind Turbine Samples Available

· Perform the Wind Turbine Sizing Calculations


Click Here for more Information






Why Wind Farms Are So Beneficial


Inventions that harness the wind have been around for thousands of years. Driven by the need for power and speed, human innovations turned away from dependence on the wind, a power source over which we have little control. After the invention of the combustion engine, wind-powered devices were replaced in all but the most remote locations.


Recently, humankind has begun again to look to the wind as a source of energy. In many countries all over the world, wind farms are being developed, constructed, and put to use. A wind farm is a collection, in one area, of wind turbines that convert the power of the wind into electricity.


Types of Wind Farms - Benefits of Wind Farms - Wind Power Potential - Wind Farm Issues and Solutions


Click Here to Find Out How







Southern California Wind Power Farm


In the middle of nowhere in the Southern California desert are thousands of windmills providing electricity to surrounding cities. It's a magnificant sight against the beautiful mountains.








Offshore Wind Turbines Keep Growing in Size


Whipped by winds exceeding 90 mph and battered by 15-foot waves, hundreds of wind turbines produce electricity off the coast of the North Sea and send it onshore to power homes and businesses in the United Kingdom, Germany and Denmark. Thousands more will be erected in the next 15 years, and bigger will be better as far as turbine makers are concerned.


The top offshore turbine makers, Vestas and Siemens, are preparing for rapid market growth and are developing 7-megawatt and 6 MW turbines, respectively. And General Electric Co. is working on a turbine that could be as big as 15 MW -- five times larger than existing offshore machines.


To Read More about Offshore Wind Turbines, Click Here







TURBY - Urban Green Energy


The Eddy GT takes up just 40 square feet to generate its kilowatt — to get that much juice from a solar array, you would need up to 400 square feet, which is a tough sell in major cities like New York and San Francisco. While not a light investment at $7,000 per turbine, Urban Green Energy CEO Nick Blitterswyk estimates that in California, which offers a rebate, you could break even in 10 years, and without the $3,000 rebate, it could take 20 years.

If you’re in San Francisco, look for some turbines in action atop Blitterswyk’s company, amongst other products like the Sanya Solar- and Wind-Powered Streetlamp, in front of Civc Center come mid-October. The turbines have scored some other less predictable placements as well, including a position atop the National Guard building in Cleveland, Ohio, and just about every house in a new middle-class subdivision outside St. Louis!

TURBY Vertical Axis Wind Turbine – Holland ( 4:32mins)








Rooftop Aero Turbines

Wind turbines designed to be installed on rooftops are generating a lot interest lately. These compact turbines can be located on top of buildings, or attached to other parts of large structures like bridges. In turns out, though, that installing wind turbine in a city environment is a bit of an art. That’s because each building has it’s own unique wind footprint, and nearby buildings also tend to generate strange wind patterns. So placing the wind turbines in the right place is key. The other challenge is to make these turbine noise-free and visually unobtrusive.


Aeroturbine – Next Generation Wind Energy ( 7 mins)


Dr. Bill Becker of university Illinois & Chicago too thought about all the drawbacks of the windmills and has come up with his own version in the wind turbine technology. This is a double-helix wind turbine known as aeroturbines. The design of these aeroturbines is simple and Dr. Becker tries to eliminate the drawbacks of the existing turbines. Harvesting wind energy from high rise buildings will be possible and production and cost efficiency will be the key factors. The propellers of these aero turbines resemble an electric beater and don’t look like a blade. These aeroturbines will not produce noise pollution and can be installed at the rooftops of high rise buildings.

The other plus factors of aeroturbines are that they are safe for birds. They

 can harness the power of multidirectional and gusting winds. They require low maintenance and are self regulatory as far as overspeed protection is concerned. Aeroturbines can work in a heavy snowfall too. They start working in a wind speed of 6mph. Continuous wind supply is not a precondition. Two models of aeroturbines available are 510V and 520H. Both these models can easily be incorporated with solar photovoltaic systems. This urban-friendly wind power can be positioned horizontally hence they can be installed on existing high rise buildings. The structural design of aeroturbines are such that they can be easily integrated and installed into new as well as existing buildings and their model cages can be mounted in vertical, horizontal and diagonal orientations.


The aeroturbines must be installed 40 feet above the ground in order to operate efficiently and care should be taken that they are not obstructed by surrounding trees and other structures.Such airoturbines are expected to be available this year, with limited functionalities, for multi-family residential buildings, institutional buildings and commercial buildings.




Aerotecture Website







Japan to replace Fukushima Nuclear plant with world's largest Wind Farm  - Article


While much of the world has moved on from the Fukushima nuclear disaster caused by the 2011 Tohoku earthquake and tsunami, Japan continues to struggle with its reliance on nuclear power. The Japanese government has just unveiled plans to decrease its dependence on nuclear energy and turn to something far less volatile: wind.

The Japanese Agency for Natural Resources and Energy plans to build what would be the largest offshore wind farm on the planet by 2020. Located near the current site of the Fukushima nuclear plant, the wind farm would feature 143 wind turbines on floating platforms anchored to the sea floor. Once completed, the wind farm would generate up to a gigawatt of power.

Although the first thought such a construct brings to mind might be danger from future tsunamis, the working group behind the plan asserts that safety measures have been implemented to guard against such instances. Project leader Takeshi Ishihara of the University of Tokyo said, "all extreme conditions have been taken into consideration in the design." Of course, Japan's residents have heard these kinds of assurances before regarding TEPCO's power plants, but in this case the good news is that a damaged wind farm would only result in a loss of power, not radioactive waste.

Although some assume the worst is over at Fukushima, just today a new report emerged revealing that fish caught near the plant were contaminated with radiation levels 2,540 times the legal limit. Fish and beef farming from the area have been halted, but some Japanese consumers are still quite wary of the food supply coming from East Japan given the lack of transparency from TEPCO (the operator of the Fukushima nuclear plant) and the Japanese government in the months immediately following the nuclear disaster.

This latest wind farm initiative is part of Japan's overall plan to be completely energy self-sufficient by 2040.






Residential Home Wind Turbine ( 10 mins)


Residential Home Wind Turbines? Home wind turbines are our specialty. Buy a home wind turbine kit from our site. Fill out our contact form and I can connect you with the home wind turbine dealer for your area. There are still areas open for new dealers to become the local source for wind/solar systems. So, if you are interested in becoming a home wind turbine dealer fill out the Contact Form at - - and we can see if your area may still be open for you to become the home wind turbine dealer for your county.





Home Wind Turbine








Vertical Axis Wind Turbines with Airfoil Blades

“Wind turbines whose airfoil blades rotate around a vertical axis (i.e., vertical-axis wind turbines; henceforth, VAWTs) have the potential to achieve higher power densities than HAWTs. this possibility arises in part because the swept area of a VAWT rotor (i.e., the cross-sectional area that interacts with the wind) need not be equally apportioned between its breadth — which determines the size of its footprint — and its height.

“By contrast, the circular sweep of HAWT blades dictates that the breadth and height of the rotor swept area are identical. therefore, whereas increasing HAWT rotor swept area necessarily increases the turbine footprint, it is possible to increase the swept area of a VAWT independent of its footprint, by increasing the rotor blade height. … The power density of the VAWT design is more than three times that of the HAWTs, suggesting that VAWTs may be a more effective starting point than HAWTs for the design of wind farms with high power density.

Furthermore, by capturing a greater proportion of the wind energy incident on the wind farm footprint, it becomes unnecessary to use wind turbines as large as those commonly found in modern HAWT farms. in turn, the use of smaller turbines can reduce the complexity and cost of the individual wind turbines, since the smaller wind turbines do not experience the high gravitational, centrifugal, and wind loading that must be withstood by large HAWTs. The less severe design requirements can enable the implementation of less expensive materials and manufacturing processes.”

Read More About It. Click Here






The Whirlers: A Colorful Wind Turbine Installation for Fresh Kills Park - Staten Island


Whirlers is project by Caterina Tiazzoldi and Eduardo Benamor Duarte that proposes building a large cluster of colorful wind turbines at Fresh Kills Park in Staten Island. The project is part of the Land Art Generator Initiative exhibition, which opened in October at the Soho Gallery for Digital Art. The Whirlers design is based on the Darrieus, a popular vertical-axis wind turbine. Tiazzoldi and Benamor Duarte conceived of the project as a sort of “whirling artificial forest” of 10,000 colorful turbines that would give visitors the experience of walking amidst a spinning forest.


Inhabitat  !!!!!




A Sky Wind Power kite of turbines might capture wind energy with spinning rotors and send electricity to the ground through the wire that tethers it.



High-altitude winds: The greatest source of concentrated energy on Earth

At any moment, the winds in high-altitude jet streams hold roughly 100 times more energy than all the electricity being consumed on Earth, according to a study by Stanford environmental and climate scientists Cristina Archer and Ken Caldeira. To capture that energy, designers are dreaming up models of wind-turbine kites that fly so high, cruising airliners would have to steer around them. The tethered kites would float high enough for powerful jet streams to flow through their turbines more than 10 times faster than winds would flow near the ground. The spinning rotors of the kite turbines would convert the wind’s kinetic energy to electricity and send it back down the wire 30,000 feet to a distribution grid. Harnessing these high-flying currents could open up an effectively unlimited source of electricity, the researchers say. Kites may have the potential to be cost competitive, Caldeira said, and the study shows that the wind resource is huge and relatively reliable.

Click Here for More information





Airborne Wind Generator of Savonius Style




Airborne Wind Turbine


An airborne wind turbine is a design concept for a wind turbine that is supported in the air without a tower. Airborne wind turbines may operate in low or high altitudes; they are part of a wider class of airborne wind energy systems (AWE) addressed by high-altitude wind power. When the generator is on the ground, then the tethered aircraft need not carry the generator mass or have a conductive tether. When the generator is aloft, then a conductive tether would be used to transmit energy to the ground or used aloft or beamed to receivers using microwave or laser. Airborne turbine systems would have the advantage of tapping an almost constant wind, without requirements for slip rings or yaw mechanism, and without the expense of tower construction. Kites and 'helicopters' come down when there is insufficient wind; kytoons and blimps resolve the matter. Also, bad weather such as lightning or thunderstorms, could temporarily suspend use of the machines, probably requiring them to be brought back down to the ground and covered. Some schemes require a long power cable and, if the turbine is high enough, an aircraft exclusion zone. As of 2011, no commercial airborne wind turbines are in regular operation


Read More about wind turbine. click here











Concept drawing of the Twin technology.


For More Information. Click Here







How Joby’s High-Altitude Wind Turbines Operates

 Click Here to find out How this Airborne Wind turbine Works






Airborne Wind Turbine - Wing 7 Flying power station?

Flying power station? Engineers at Makani Power achieved just that, by designing their “Wing 7″ prototype which generate 20 Kw (Kilowatt) just by flying in the sky. Wing 7 consist of functionality & looks of a helicopter, airplane, kite & a robot which has designed to tap winds generally blows above 1000 to 1500 feet where standard land based wind turbines can’t reach.


At these altitudes winds blows almost consistently at a predictable speeds, so Wing 7′s placement gurantees continious supply of power. From a base station Wing 7 can takes off vertically by powering up it’s rotors (rotors also can beswitched to function as turbines) & once it’s reach the appropriate altitude it start rotates into horizontal flight and flies in swooping circles.


For More Information. Click Here













Tidal Power – Animation



Tidal Power


The tide moves a huge amount of water twice each day, and harnessing it could provide a great deal of energy - around 20% of Britain's needs. Although the energy supply is reliable and plentiful, converting it into useful electrical power is not easy. There are eight main sites around Britain where tidal power stations could usefully be built, including the Severn, Dee, Solway and Humber estuaries. Only around 20 sites in the world have been identified as possible tidal power stations. A few years ago, "tidal power" meant "tidal barrage", but these days there are other options as well.


For More Information. Click Here


Tidal Wave Alternative Energy ( 5 mins)








Tidal Power


Tidal power, also called tidal energy, is a form of hydropower that converts the energy of tides into useful forms of power - mainly electricity.

Although not yet widely used, tidal power has potential for future electricity generation. Tides are more predictable than wind energy and solar power. Among sources of renewable energy, tidal power has traditionally suffered from relatively high cost and limited availability of sites with sufficiently high tidal ranges or flow velocities, thus constricting its total availability. However, many recent technological developments and improvements, both in design (e.g. dynamic tidal power, tidal lagoons) and turbine technology (e.g. new axial turbines, cross flow turbines), indicate that the total availability of tidal power may be much higher than previously assumed, and that economic and environmental costs may be brought down to competitive levels.

Historically, tide mills have been used, both in Europe and on the Atlantic coast of North America. The incoming water was contained in large storage ponds, and as the tide went out, it turned waterwheels that used the mechanical power it produced to mill grain. The earliest occurrences date from the Middle Ages, or even from Roman times. It was only in the 19th century that the process of using falling water and spinning turbines to create electricity was introduced in the U.S. and Europe.[

The world's first large-scale tidal power plant (the Rance Tidal Power Station) became operational in 1966






Dynamic Tidal Power (or DTP)




Dynamic tidal power (or DTP) is an untried but promising technology that would exploit an interaction between potential and kinetic energies in tidal flows. It proposes that very long dams (for example: 30–50 km length) be built from coasts straight out into the sea or ocean, without enclosing an area. Tidal phase differences are introduced across the dam, leading to a significant water-level differential in shallow coastal seas – featuring strong coast-parallel oscillating tidal currents such as found in the UK, China and Korea.















Tidal Barrages


Tidal barrages make use of the potential energy in the difference in height (or head) between high and low tides. When using tidal barrages to generate power, the potential energy from a tide is seized through strategic placement of specialized dams. When the sea level rises and the tide begins to come in, the temporary increase in tidal power is channeled into a large basin behind the dam, holding a large amount of potential energy. With the receding tide, this energy is then converted into mechanical energy as the water is released through large turbines that create electrical power though the use of generators. Barrages are essentially dams across the full width of a tidal estuary.






Tidal Barrages

These work rather like a hydro-electric scheme, except that the dam is much bigger.


A huge dam (called a "barrage") is built across a river estuary. When the tide goes in and out, the water flows through tunnels in the dam. The ebb and flow of the tides can be used to turn a turbine, or it can be used to push air through a pipe, which then turns a turbine. Large lock gates, like the ones used on canals, allow ships to pass.


If one was built across the Severn Estuary, the tides at Weston-super-Mare would not go out nearly as far - there'd be water to play in for most of the time. But the Severn Estuary carries sewage and other wastes from many places (e.g. Bristol & Gloucester) out to sea. A tidal barrage would mean that this stuff would hang around Weston-super-Mare an awful lot longer!


Also, if you're one of the 80,000+ birds that feeds on the exposed mud flats when the tide goes out, then you have a problem, because the tide won't be going out properly any more.


For More Information. Click Here



Tidal barrage,





Tidal barrage, Rance Estuary, France


The largest tidal power station in the world (and the only one in Europe) is in the Rance estuary in northern France, near St. Malo. It was built in 1966. - A major drawback of tidal power stations is that they can only generate when the tide is flowing in or out - in other words, only for 10 hours each day. However, tides are totally predictable, so we can plan to have other power stations generating at those times when the tidal station is out of action.

Tidal Barrage, Rance Estuary, France – Video ( 4 mins)

At present there are several ways of producing electricity directly from the ocean. The most developed methods are tidal power, ocean thermal energy conversion, and wave power. The main advantage of tidal power is that it provides a clean, renewable and above all predictable source of energy. Tidal power is produced by building a dam across the opening of a tidal basin. The sluice gate opens to allow the tide to flow into the basin. When closed, the sea level drops and standard hydropower techniques generate electricity from the water elevated in the basin.


The Rance power station, situated south of St Malo (France) is the unique tidal power station in the world providing electricity for commercial use. Inaugurated in 1966, it can generate 240 megawatts of power, with minimal environmental impact, and provide electricity for 223,000 inhabitants. The tide fills and empties the Rance estuary twice a day and the amplitude can reach the record height of 13.5 meters. This infoclip shows: - Rance power station and estuary - Pylons - St Malo at night.





















Wave Power


Wave power is the transport of energy by ocean surface waves, and the capture of that energy is to do useful work – for example, electricity generation, water desalination, or the pumping of water (into reservoirs). Machinery able to exploit wave power is generally known as a wave energy converter (WEC).

Wave power is distinct from the diurnal flux of tidal power and the steady gyre of ocean currents. Wave-power generation is not currently a widely employed commercial technology, although there have been attempts to use it since at least 1890.[1] In 2008, the first experimental wave farm was opened in Portugal, at the Aguçadoura Wave Park.[2] The major competitor of wave power is offshore wind power.







Ocean Energy


International Distribution of Wave Power Potential



Conversion of the wave resource could supply a substantial part of the electrical energy demand of several countries, in Europe, particularly Ireland, Portugal and Spain. The electricity demand on Islands in remote areas could entirely be met by converting a small fraction of the available resource.






There are several methods of getting energy from waves.

One of them works like a swimming pool wave machine in reverse.

At a swimming pool, air is blown in and out of a chamber beside the pool, which makes the water outside bob up and down, causing waves. ....




Waves are generated by wind passing over the surface of the sea.


 As long as the waves propagate slower than the wind speed just above the waves, there is an energy transfer from the wind to the waves. Both air pressure differences between the upwind and the lee side of a wave crest, as well as friction on the water surface by the wind, making the water to go into the shear stress causes the growth of the waves.[4]

Wave height is determined by wind speed, the duration of time the wind has been blowing, fetch (the distance over which the wind excites the waves) and by the depth and topography of the seafloor (which can focus or disperse the energy of the waves). A given wind speed has a matching practical limit over which time or distance will not produce larger waves. When this limit has been reached the sea is said to be "fully developed".

In general, larger waves are more powerful but wave power is also determined by wave speed, wavelength, and water density.

Oscillatory motion is highest at the surface and diminishes exponentially with depth. However, for standing waves (clapotis) near a reflecting coast, wave energy is also present as pressure oscillations at great depth, producing microseisms.[4] These pressure fluctuations at greater depth are too small to be interesting from the point of view of wave power.

The waves propagate on the ocean surface, and the wave energy is also transported horizontally with the group velocity. The mean transport rate of the wave energy through a vertical plane of unit width, parallel to a wave crest, is called the wave energy flux (or wave power, which must not be confused with the actual power generated by a wave power device).










Wave power devices are generally categorized by the method used to capture the energy of the waves, by location and by the power take-off system.


The InVEST Wave Energy model measures and values the electricity generation potential of ocean waves. For each specified region, the model estimates expected wave power and harvested energy, and calculates the net present value of constructing and operating a wave energy conversion facility. Spatially explicit outputs equip users to evaluate tradeoffs when siting wave energy facilities to optimize energy production and value throughout their lifespans.











A company called Pelamis Wave Power are developing a method of offshore wave energy collection, using a floating tube called "Pelamis".


This long, hinged tube (about the size of 5 railway carriages) bobs up and down in the waves, as the hinges bend they pump hydraulic fluid which drives generators.







“Oyster”, a giant flap twice the height of a double-decker bus which swings back and forth with the waves. Every time the flap moves, the action compresses hydraulic pumps which force water through a pipe to the shore where it drives a generator.



Oyster Wave Power







Gothenburg-company Vigor Takes Wave Energy to the Next Level


Vigor Wave Energy develops a brand new way to convert wave energy into electricity. The concept is called the Vigor Wave Energy Converter and is based on a floating hose using water and air only. The main component is a hose on the water’s surface, which follows the movements of the waves. Letting in water and air into the hose create batches that “surf” inside the hose. The batches’ movements create energy in the form of pressure. The water is then pushed through a turbine, driving a generator that converts the pressure into electrical energy.







Ocean Waves Trapping Channel System


One way to harness wave energy is to bend or focus the waves into a narrow channel, increasing their power and size. The waves can then be channeled into a catch basin or used directly to spin turbines. There are no big commercial wave energy plants, but there are a few small ones. Small, on-shore sites have the best potential for the immediate future; they could produce enough energy to power local communities. Japan, which imports almost all of its fuel, has an active wave-energy program.









Types of Green Energy - Video




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