Sea / River Power Plants

While wind generation is rapidly expanding and is an important piece of solving the world's energy needs, wind resources are limited, power generated by wind is not predictable and "view shed" and "not-in- my-back-yard" issues restrict development of wind projects. In fact, view shed issues have become a major obstacle for develop of most projects, regardless of their societal benefits.

Ocean power generation, on the other hand, has essentially unlimited development potential, is predictable, if not constant. Although power generated from ocean energy can be directly "plugged into" coastal load centers and remote communities, it is not restricted to these markets. The market for renewable energy is virtually unlimited. In European Union countries, for example, a considerable premium over fossil fuel generation is currently being paid for "green" power. There are many potential sites for ocean current energy in Northern Europe near the United Kingdom, in Southern Europe near the mouth of the Mediterranean Sea, as well as off the coasts of South America, Africa and Japan, and many of these countries are providing special incentives to ocean renewable energy projects. In addition, there are countless numbers of island communities where ocean currents accelerate around and between land masses. Coastal communities throughout the world will be the primary beneficiaries of ocean power due to the presence of strong ocean and tidal currents and insufficient energy supply.

Tidal in stream energy occurs due to the moving mass of water with speed and direction as caused by the gravitational forces of the sun and the moon, and centrifugal and inertial forces on the earth's waters. Due to its proximity to the earth, the moon exerts roughly twice the tide raising force of the sun. The gravitational forces of the sun and moon and the centrifugal/inertial forces caused by the rotation of the earth around the center of mass of the earth-moon system create two "bulges" in the earth's oceans: one closest to the moon, and the other on the opposite side of the globe. The best tidal flow converters efficient convert both low and high velocity stream energy that we call  RotoJET  turbines. Several advanced  patented  RotoJET  turbine systems have been developed.

Submersible JET self augmented turbine according to several patented nventions utilize recent technological advances from several industries and incorporate them into an integrated power system. The industries which have provided these technological advances include the off-shore oil and gas, wind power generation, maritime, shipping and telecommunications. These technological advances include not only unique designs and equipment but also state of the art advanced materials, including composite materials.

Axial JET Hydrokinetic Turbines
We have developed two basic project of the Axial JET Hydrokinetic Turbines:

• First type is applicable in relative low water speed currents or for bottom fixed stream energy converter units. It is a basically non-ducted JET-drag axial flow turbine with fixed blades variable speed operated.

• The second type is applicable in medium to high water speed currents for pontoon supported structure. It is a non-ducted fixed blades turbine with JET-lift blades variable speed operated.

Both developed (patent pending) tidal/river turbines JET/Drag and JET/Lift are relatively low cost solutions operating with high capacity factor and generating low cost power.

Every axial rotating machine (e.g. turbine) in water creates vortex that forces water tangentially. Tip blade JET channel/s redirect/s the forced water to tip JET stream/s. As a result of the JET stream/s in opposite direction is creating tip JET force/torque.

Free river/tidal turbine is several to 15 meters in diameter. It is possible to develop more than 1 MW unit.

The non-ducted hydrokinetic power generation relies simply on the extraction of energy from the natural river velocity of water, these power systems can be placed with minimal infrastructure or environmental impacts.

The JET rotors on the above described turbines turn slowly. A ship's propellers, by comparison, typically run 5 - 10 times as fast. The risk of impact from JET rotor blades is small, because the marine creatures that swim in strong currents tend to be agile, and can avoid slow-moving underwater obstructions.

See a comparison in operation of JET turbine vs. conventional turbine at: http://www.youtube.com/watch?v=ghp-7MqUyhs  

New invented end less JET blades of a wind / hydro kinetic turbine propeller

New invented (patent pending) end less JET blades of wind / hydro kinetic propeller. Blade tips of propellers create significantly energy loses and noise / cavitation. Newly invented JET blades avoid tip energy loses and and noise / cavitation. That is why new endless blades are much more efficient in the comparison with all known blades. Patent pending - see more at http://www.tonchev.org