New
Technologies of Free Stream / Tidal / River / Wave Power PlantsHigh efficient JET BLADE of innovative under water free stream turbines operating in omni-directional flows
The main advantage of the
invented hollow hydrofoil blade is a special design that
exploits three types of rotational forces:
1. Hydro jet forces
2. Hydrodynamic lift
3. Helpful drag forces
The blade is a unique blade worldwide. In the hollow blade part (by rotating) the centrifugal force is constantly transforming to jet streams behind the blade that creating rotational jet torque. At low water speed the rotational jet torque is creating by flow redirection in the hollow blade. Because of the invented blade all jet blade turbines increased both blade velocity and efficiency. High blade performance is achieved by significantly reducing of no helpful blade drag forces, (especially inductive loses) and enhancing helpful drag and by improving of the blade hydrodynamic lift. The jet blade allowing the turbine to be scaled independently in horizontally or vertically to fit to existing environment. The jet blade turbines have very good performance at low flow velocity. See a scheme of a hydro power plant with over water drive power train coupled to the vertical shafts of the under water counter rotating Jet Darrieus turbines.
The jet blade turbines operate efficiently in both medium water and and air. A prototype in operation of a wind jet blade turbine
see at the video here. The jet blade water turbine prototype is testing. See animation of a hydrokinetic plant with new invented jet blade turbine
Counter-rotating turbines have
several advantages:
• Minimized water space needed – more compact hydrokinetic power
plant
• Reducing significantly resultant dynamic stress and vibrations of the
hydrokinetic power plant structures
• Summarizing of the turbine rpm that allow to increase of gear
box efficiency in the case of geared drive train
Building the dam of conventional hydropower plants using high head turbines is very expensive and a large area of land is flooded – which have big ecological impacts on local wildlife. The invented turbine for low velocity water flow enable mankind to tap into thousand, thousand kilometers of river the forgotten renewable energy source, to be placed where it needed, voiding the high cost of transmission loss. After generating power; the new jet blade turbine will lowering the speed of the free water stream to reduce the river bank and soil erosion problems.
The jet blade turbine is a uni-rotational machine in omni-directional flow that is applicable as a prime energy converter in the tides and wave power plants.
Tides and marine currents are predictable and they can be used as a dependable base line supply. Water currents are analogous to air currents. Because water is so much more dense than air, a 22 х 17 m (370 m2 swept area) vertical axis Jet Blade Marine Turbine operating at current velocity of 3 m/s could produce similar rated power as a 60 m diameter (2 800 m2 swept area) horizontal axis wind turbine operating at 15 m/s (e.g. ~ 1 MW). Such marine turbines are anticipated to be installed at depths of 30 – 40 m. The jet blade hydrokinetic turbine design allows to reduce significantly the cost of electricity generated at the level as low as the utility grid prices at present. There are a large number of tidal sites in the world's oceans which can provide a significant, viable and cost effective source of reliable energy. Many are strategically located close to populated areas where they can be economically harnessed using an ecologically benign zero- and low-head technologies developed by presented jet blade including jet blade turbine applications in natural and artificial vortices.
Invented jet blades are applicable to wind turbines, as well. A short presentation of Darrieus wind turbines with new invented jet blades see here.
A short presentation of the new invented vortex hydro power plant and under water power plant with jet self augmented Savonius turbines see here
Number of JET augmented hybrid vertical axis hydrokinetic turbines ( fixed to a common shaft Savonius JET scoops and straight JET blades) are developing. The performance coefficient of self JET augmented turbine is increased up to 2.5 times in the comparison to the conventional blade turbines.
Vertical axis 3 jet blade under water hydrokinetic turbine
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