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Using Underwater Kites to Generate Power


Minesto, a spin-off from Swedish automaker Saab, is developing what it calls it's "Deep Green" technology, underwater kites tethered to the ocean floor that could produce continuous energy from tidal flows. A single Deep Green turbine could produce up to viagra order online 500 kilowatts of electricity. And tides are much more regular than winds, so that the energy produced would be less erratic and variable.

The kites have a 12m (almost 40 ft) wingspan. The kites would remain at least 20m (66 feet) below the surface, to prevent conflicts with ocean navigation and minimize visual impact. Tidal flow as low as 1.6 meters/second can be used to create the lift necessary to move the kite.

Since the underwater kite is usa online pharmacies viagra anchored to the ocean floor, it is able to move at much faster speeds, which makes the turbine more effective, as it traverses back and forth in order to generate electricity. Although wind-based deepwater offshore power systems are difficult to install and operate, Deep Green tidal kites would be well suited for instalation in deeper waters. Furthermore, the underwater kites are much lighter and easier to cheapest propecia in uk install than the equipment needed for other deepwater generation systems. Deepwater generating systems have the additional expense and technical hurdles of transmitting the power over a greater distance. But the higher efficiency and viagra without perscription more consistent generation offered by Deep Green could offset those drawbacks.

The company indicates the order cialis pill Deep Green system offers an operating cost of 0.06-0.14 Euros/kWh, as compared to 0.15-0.30 Euros/kWh for other tidal systems, and 0.10-0.12 Euros/kWh for offshore wind systems.

A scale model of Deep Green will be tested in Northern Ireland next year as the next stage of development for this system.

via: Slashdot


Drawing Power from Dutch Coastal Dikes


Plans are being considered to turn the famous Dutch dikes into tidal power generators. Although originally built to protect the people and land of the Netherlands, now a committee of various government representatives has issued a recent report including some suggestions to revise the operation of ordering viagra the dikes to create a more pleasant and more natural land behind the dikes, and to provide a source of power. Openings in the series of dikes would provide ideal locations for tidal power plants.

The Netherlands have had protective ocean dikes to guard the coastline since the disaster in 1953 when more than 1800 people were killed and over half a million acres of land was flooded by the North Sea. After this tragedy, the extensive Delta Works were constructed over the next four decades, and the last parts of the project were finally completed in 1997.

Energy, however, is not the primary motivator for this. Instead, it is an interest in restoring the site about tramadol natural condition to viagra online online estuaries and tidal flats whose character has significantly degraded over the years since the dikes were installed. "Opening water locks would allow the tide to return to now stagnant waters, the report stated. This would be a boon to nature, because certain plants and animals, which have all but disappeared since the estuaries were closed off, can return. Deeper into the delta lies a fresh water basin where smelly algae bloom in the summer. Allowing salt water to reach these outer stretches again could improve conditions for residents and holiday-makers."

In the aftermath of a catastrophe, it is all to easy to focus solely on preventing that tragedy, no matter the cost. 'With all the focus on safety after 1953, [committee director Joost] Schrijnen said, "other aspects were neglected." He now wants to good choice generic viagra change that. "But without sacrificing safety," he added.' Turning the dikes into a power generating solution, as well as improving environmental quality seems like a solution that will provide multiple benefits, in addition to protecting the land from the cialis fast delivery usa sea.

link: nrc handelsblad

via: Slashdot


Oregon Wave Project Under Way

A project to build the country's first wave power station off the coast of Oregon is finally moving forward.  Wave power company Ocean Power Technologies just signed a contract with Oregon Iron Works to start building 10 buoys, with the first one to be deployed a year from now off the coast of Reedsport.

This project will test the capabilities of lowest priced viagra the buoys in the area before the company goes forward with a 200-buoy project nearby.  Within two years all ten buoys should be deployed and generating power for PNGC Power, the utility that is purchasing all that clean energy.  The system will have a capacity of about 1.5 MW and OPT expects to sell the power for about 15 cents/kWh.

Here's hoping OPT has better luck than its predecessors. Finavera, another wave power company, had a 40-ton buoy of theirs sink off the coast of Oregon two years ago after only two months at sea.

The projects success could mean great things for the future of wave power in America.  Studies have shown that wave power, and wave power alone, could power the world twice over, so needless to say, it's something we want to generic propecia for sale tap into.

via Green Inc.


Using Osmosis to Generate Clean Energy

osmoticpowerSolar. Wind power. Wave power. Geothermal. Tidal power. If you're a regular EcoGeek reader, you're probably pretty familiar with the different major power generating alternatives to the burning of non-renewable fossil materials. But still, osmotic power generation is likely something you haven't heard of before. Your first question is likely 'How do you use osmosis to generate electricity?'

Osmosis is a process whereby water with two different concentrations of solution (in this case, salt) is separated by a semi-permeable membrane. Fresh water is how to get viagra able to pass through the membrane to the salt water side, but salt water cannot cross back in the other direction. This causes an increase in pressure on the salt water side, and this pressure difference is used to run a turbine which produces electricity.

Statkraft, a Norwegian renewable power company, has begun operations to use this process to generate electric power. The test facility, opened this week in Norway, is just a small demonstration plant which will produce only a few kilowatts of power. However, by 2015, Statkraft expects to be producing 25 megawatts of online viagra prescriptions electricity by osmotic power.

Since the osmotic process requires a great deal of freshwater to brand levitra without a prescription function, we can forsee some serious problems for this system in the many parts of the word where the availability of fresh water is limited. The osmotic process also produces waste water that is saltier than freshwater, but not as salty as seawater, and the discharge of large quantities of this brackish water could be detrimental to local aquatic ecosystems.

via: Beyond the Beyond and Slashdot


Dam Retrofits on Ohio River to Produce 350 MW of Hydropower

The construction of new hydropower plants isn't particularly environmentally-friendly, but what about the already existing dams in the country that could be making electricity?  According to MWH, a water engineering firm, out of the 80,000 dams in the U.S., only three percent are currently used for power generation.  Isn't that just a bunch of indian generic viagra untapped, clean energy?

Ohio utility American Municipal Power thinks so.  It has partnered with MWH to conduct five retrofit projects on the Ohio River, turning dams that were built for navigation and watershed purposes into hydropower facilities.  When completed sometime between 2013 and 2015, the dams will produce a total of 350 MW, enough power for 350,000 homes.  The total cost of the projects will come to about $1.9 billion.

The potential of dam retrofits to produce clean energy is huge.  Here's a list (PDF) of dams with retrofit potential according to a federal survey.  If all of them began producing electiricty, think of all the coal power that would become unnecessary.

via Green Inc.



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