Video NEW invented TIDAL and RIVER J E T hydrokinetic turbines. Advanced Patented and Patent Pending Solutions of Wind & Hydrokinetic JET Turbines , Wave Power Generation Facilities, Solar PV Parks, Wind Farms, Wave and Tidal Power Plants, Hybrid Renewable Energy Plants. Electric, Hydraulic and Hybrid Car Patents. цен

The ROTOJET designs solve two main problems of the conventional propeller (lift and/or drag) turbine rotors by JET peripheral channels (or semi channel) of the blades. The JET channels have two functions:

The first one is to avoid the tip blade energy loses because of tip vortices,

The second function is much more significant. The second function is acceleration of the fluid current in the JET channel (or semi channel) and it?s directing towards the back of the correspondent blade, and thus the flowing current to create JET stream. In the opposite direction of the JET flow appears JET force/torque which considerably supports the rotation.

Because of the JET channels big part of the fluid pressure over the rotor is redirected into JET force and also due to the channels the inductive blade tip losses of energy are vastly decreased.

During last 10 years we are developing a lot of hydro-kinetic power applications. We have tested ducted and non ducted hydro kinetic turbines. The ducted hydro kinetic applications are more heavy and costly. They require more often and expensive maintenance.

The prevailing world wide practice in zero head tidal plants now is to implement simple and low cost duct less Savonius machines. But they show low efficiency. That is why we have focused on number of options to increase the Savonius machines efficiency.

We find that the around rotor water speed and turbulence affect significantly rotor efficiency. We have developed a mats model for it and have developed respective simulator. Based on both the simulator and water test we propose to you number of options as follow:

As the first option is to use duct less turbines to keep bigger the around rotor water speed and to reduce cost and pay-back of a complete hydro kinetic power plant.

As the second option is to use shaft less Savonius turbines to reduce the around rotor and wake turbulence. It is more important for the hydro kinetic farms and pontoon power barges.

As the third option is to reduce periphery turbine energy losses by application of smaller turbine scoops (instead of 180 degree semi cylinder - smaller)

As the next option is to reduce after wake turbulence by two blade open center Savonius turbine design (negative overlap) with 180 degree offset.

The listed above options in interaction with our radical new ROTOJET designs increasing non ducted Savonius turbine efficiency significantly.

The new ROTOJET designs enhance the Savonius rotor cost by several %. That is why it is the best energy and economical feasible solution. New invented 3D JET rotor is a unique device for exploitation of wind / river / canal / tidal current resources, including in low moving water. The most natural common water flow is low speed water currents - about 1 m/s and less. Our 3D diagonal blades JET rotors and spiral shaped rotors best performed at low speed currents. We have completed a very successful set of model-scale tests in and these tests have proven the hydrodynamic – air dynamic efficiency of the turbine designed for low wind/water speeds.

At next videos you can see the difference in water operation between non jets augmented shaft less turbine with modified scoops and the same, but by a ROTOJET machine design.

New invented ROTOJET turbines rotate smoother, create less around rotor and wake turbulence and perform much better in the comparison with non jet augmented turbines.

The jet mode of a vertical wind/hydro kinetic blade operation shown at next video:

You can see at: www.youtube.com/watch?v=D4ZV4NSWHwk&feature=channel_video_title Transverse horizontal axis hydro kinetic jet turbine. The incoming water passes through the open center and it gets out at the back. The turbine hollow scoops are forming the jet channel, which is in the periphery of the turbine. The jet stream induces the additional rotational jet force.

A new invented vortex jet turbine. The vertical axis of the turbine is coaxial with the vertical vortex axis. It is a savonius type turbine with hollow blades. Each blade forms an accelerating hydro-jet stream. In the opposite direction of the jet stream, a jet force is formed in the periphery of the rotor. The jet force increases the rotational rate of the rotor.

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Owing to the mentioned above, the JET rotors (propeller or non-propeller) are about two and more times more efficient in comparison to the conventional rotors. Such JET turbines are described in the patent descriptions BG110 251/2008 and BG 110 340/2009

ROTOJET turbine designs generally increase both TSR and self starting ability that is very important in tidal operation. But TSR is non linear depending on the water/air speed. The speed of the wind, tidal stream is varying in very broad range. To find the best design of the Jet turbine in tidal stream have to now range of water speed changing, water density and water temperature changing. But much more important is the frequency distribution of the water/wind speed per day / year.

We have demonstrated that the power that can be extracted by a free flow Jet/Lift/Drag ROTOJET Hydro-Kinetic Turbine is significantly higher than the "Betz limit" which restricts the total extractable power for an unconfined turbine such as a wind turbine. The Betz analysis is widely applied to the free flow water streams, but it underestimates the turbine power output. The Betz limit not related to the JET assisted wind / hydrokinetic turbines.

Above description relates single turbine only. The calculations of group of ROTOJET turbine (hydro-kinetic / wind farm) are more complicated.

First ever ROTOJET. Jet / Lift / Drag turbine is the most economical feasible solution of dam less hydropower. And for wind applications as well. The ROTOJET design is very low cost in both manufacturing and operation. See below a basic comparison of different types of wind/hydrokinetic turbines:

See the related demo video by clicking of each green link in the table above. Take an overlook of the description of each video.

See at www.youtube.com/watch#!v=-PX0wGi3Oag&feature=channel Wind-Hydro Kinetic Tidal/River/Canal Power Barge with Vertical Axis JET Mono- directional Rotating Turbines in Omnidirectional Water/Wind Flow. Wind/Hydro-kinetic power plant with JET blades on vertical shafts (cross flow turbines)based on a floating anchored pontoon structure. Patented JET turbines formed by hollow blades with elliptic-like cross-section. The blades with side inlet aperture and outlet nozzles at blade trailing edge. It is a radical new patented blade design (ROTOJET) that increases flow-to-power efficiency significantly and helps to increase turbine performance at low and moderate flow speeds and in turbulent flow as well. Easy starting turbines. Patent pending. Integrated oil less power train with a common electric alternator.

The final aim of the presented here new developments of wave and tidal power farms are to decrease both initial investments and operation costs by environment friendly technical solutions. There are multiple ways to tap the energy of the ocean, including its tides, thermal features, and salinity. But wave energy appears to be the most promising and closest to commercial production.

Wave energy is the capacity of the waves for doing work. Ocean waves are generated by the influence of the wind on the ocean surface first causing ripples. As the wind continues to blow, the ripples become chop, fully developed seas and finally swells. In deep water, the energy in waves can travel for thousands of miles until that energy is finally dissipated on distant shores. Deep water wave power resources are truly enormous, between 1 TW and 10 TW, but it is not practical to capture all of this. The useful world-wide resource has been estimated to be greater than 2 TW. Locations with the most potential for wave power include; the western seaboard of Europe, the northern coast of the UK, Northwestern coast of Ireland and the Pacific coastlines of North and South America, Southern Africa, Australia and New Zealand.

Wave energy is varying seasonally, but tidal power varies in very broad range hourly. That is why for every economical feasible wave power farm is important the EFFICIENCY of the wave power extractors. The best EFFICIENCY means maximal possible rate of power generated per a kilogram of the wave power extractors.

For every economical feasible tidal power farm is important the CAPACITY FACTOR of the tidal power turbines. The best CAPACITY FACTOR means maximal possible yearly energy yield per a tidal power turbine.

Basic types of wave power extractors
We are using here a classification by the degree of the wave power convertions of different types of wave converters. The top position of the classification shows both maximal energy efficiency and the best economical feasible solution. Wave power is the transport of energy by ocean surface waves, and the capture of that energy to do useful work. The wave power extractors are a technology and devices that use the motion of ocean surface waves to create useful power. The wave power is presented by 3 dimensional motion of the sea / ocean surface forced by wind typically. That is why three general types divided wave power extractors:

The best EFFICIENCY means maximal rate of power generated per a kilogram of the wave power extractors. Several advanced patent pending solutions based on NEW invented 3 D power TM extractor have been developed to obtain the maximal possible EFFICIENCY by 3 D direct wave power converters.

Basic types of hydrokinetic / tidal turbines
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.

River in stream energy occurs to the hydrokinetic energy of the moving river water. A tidal signature can be seen in rivers up to a hundred miles or so from where the river empties into the ocean. In these cases, it is not important whether the site is called a tidal site or a river site. The velocity of the river current is a function of the slope of the reach and the effect of gravity and the roughness of the riverbed and the effect of frictional forces slowing the current.

Hydrokinetic turbines are similar to wind machines but for under water operation in free water streams. A wide variety of types and sizes of wind machines exist today. We are using here a classification by the overall degree of load of the different types of tidal power turbines during an yearly cycle. The top position of the classification shows both maximal annual energy yield and the best economical feasible solution.
Usually, wind turbines are classified by mode of operation (drag and lift mode of operation):
On a drag device the water / wind pushes the blade forcing the rotor to turn about its axis; the most common example of a drag device is the farm windmill. Drag devices characteristically produce high starting torque and are well suited to pumping water in low volumes, however they are limited in the amount of energy they can extract from the wind. Drag devices both horizontal and vertical axis of rotation of tidal application operate at low velocity flow and high speed flow, as well.

Wind / hydrokinetic turbines that use lift have only a few (two, three or four) blades in contrast to the multiple blades of a drag device. One blade rotating very fast can extract as much energy as many blades rotating slower. Lift devices use slender airfoils for blades, whose shape is the same as an airplane wing. Lift devices are more efficient than the drag devices, thus the blade area can be reduced considerably. But lift devices not operate in low velocity stream even they are not self starting machines. Lift devices are further classified by axis type: horizontal (HAWT) and vertical (VAWT).

The third mode of wind / hydro turbine operation is the JET mode of operation. It is a radical new solution. All my inventions relate to the hydro and wind JET turbine applications take advantages of an additional JET force augmented blade rotation. Thanks to it the turbine efficiency is increased up to 2 times for both lift and drag devices on the vertical, inclined and horizontal axis hydro / wind rotors of axial and cross flow rotors. All JET augmented turbines are self starting machines at very low flow stream.

The best CAPACITY FACTOR means maximal yearly energy yield per a tidal power turbine. The NEW invented JET augmented axial and cross flow water current turbines we call ROTOJET machines, as well. Several advanced patent pending ROTOJET hybrid turbines have been developed to realize the maximal possible CAPACITY FACTOR by omni-directional lift / jet / drag turbines.

Thanks to the additional JET mode of blade rotations new designed turbines can increase the turbine efficiency many times (see videos at www.b2b.bg/new.html )

All my JET turbine developments depend on site conditions and planned goals of the turbine implementations.

You can see how operates a 9 JET turbine module of dam Less Hydro Power Farm at very low water speed at www.youtube.com/watch#!v=Nqe5DCZ4SRk&feature=channel . The Hydro Kinetic River module with common oil less over water drive train includes 3 stage RPM increaser and a common electric generator. Low cost high reliable patented solution for low cost power generation. The module shown is environmentally friendly and does not impact river life and river eco-systems.

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Up-Front open center Hub Wind Speed Distributor of Horizontal Axis Wind Turbine increases low wind Speed that increases rotational speed and efficiency of the turbine generator at low and turbulent wind. The general availability and reliability of wind speed data is extremely poor in many parts of the world. Large area of the world have wind speed in intermediate range (3 to 4.5 m/s) where wind power may or may not be an alternative
option. It is necessary to concentrate on the design and development of Low RPM, High Torque Small wind generator which starts operating at much lower values of Cut-in wind speed and continues to operate through a substantial portion of the year. This will also be of great importance for those areas of the world where annual mean wind speed is low (less than 3 m/s)

Our new invented Up-Front Hub Flow Speed Distributor operates efficient at low flow speed of both air and water stream.

Both developed (patent pending) tidal 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.

Megawatt class tidal turbine is about 13 meters in diameter. It is possible to develop 2 MW tidal power system by 2x1MW axial (or cross flow) spaced turbines operating in counter rotating mode using a common gearing and electric alternator, electric transformer, power electronics etc..

Megawatt class tidal turbine is about 13 meters in diameter. Is possible to develop 2 MW tidal power system by 2x1MW axial (or cross flow) spaced turbines operating in counter rotating mode using a common drive/gearing and electric alternator, electric transformer, power electronics etc..

The non-ducted hydrokinetic power generation relies simply on the extraction of energy from the natural tidal 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: about 8 to 25 revolutions per minute. A ship's propellers, by comparison, typically run 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..