ROTOJET Technology - The New Jet Turbines of 21^st Century

One of the fastest emerging fields of clean, renewable energy also involves the water, but with fewer of the concerns. Hydrokinetic energy works by harvesting energy from the natural, recurrent movement of water, without significantly altering the water flow or landscape. As recognizable as wind-turbine lookalikes in the water, or as odd looking as jointed bouys on the water’s surface, hydrokinetic power generators come in many forms. We have developed (  www.tonchev.org  ) several highly efficient JET designs, described on these pages. Hydrokinetic power could be a major new step both toward a cleaner energy system, and a more energy independents of conventional fuels.

Technical history of the development of wind-turbine building has begun at the end of 19^th and the beginning of 20^th century. The scientific, technical and technological development of the propeller wind turbines follows the development of the airplane propellers. The principal difference between the fluid propeller motors and the fluid propeller turbines is in their function. The propeller motors have the task to create traction. Their rotation is what creates their traction and it is not an aim but a mean. And as far as there are losses of energy during the rotation then they are parasitic according to the main function – the traction. In each case the losses from rotation are unavoidable.

The mission of propeller turbines in the mass case is to rotate for turning the electro-generator. It means that the rotation is the aim and not the mean as it is at the propeller engines. During their rotation the turbines are subjected to the dynamic thrust of the flow which is unfavorable from energetic point of view. This axial thrust is in a sense analogical to the traction at the propeller motors. But for the turbines it is parasitic from energetic point of view and from mechanical-constructive standpoint it destroys them and is also undesired.

The working Principe of the JET fluid turbines is radically new. The JET propeller turbines rotate by analogical reason causing the rotation of the non-JET propeller turbines. The propellers of JET turbines rotate by reason of the difference of the flow pressure before and after their blades. But this difference around the outlines and especially at the periphery of their blades is almost zero, because the fluid with high pressure freely passes to the back blade side, where the pressure is lower which ultimately leads to losses of energy (tip blade loses). This is the first main disadvantage of the propeller turbines.

The second one is that the axial thrust of the fluid over turbine rotors is parasitic and does not contribute to their rotation but only loads them mechanically.

The ROTOJET designs solve the main two 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 fist 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 its 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 JETchannels 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.

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.

More about water turbines operates in low moving water see  at: http://www.tonchev.org/newhydrokinetic.html

For new invented zero head jet/vortex power plants see at: http://www.tonchev.org/implosion.html

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.

http://www.youtube.com/watch?v=Uodx12Kr8vU 

http://www.youtube.com/watch?v=2wkUzk5vyko

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:

http://www.youtube.com/user/miscbeep#p/u/2/l7MoQbsRSPY

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

See a new patented JET augmented vertical axis cross flow turbine of Savonius type at www.youtube.com/watch?v=zMhw5cAk9Ps&feature=channel.

 A new patented HAWT with JET blades see at: www.youtube.com/watch#!v=OwkLKdPuJAY&feature=channel

See the related videos of patented (BG patents) JET augmented turbines by clicking of each link in the table above. Take an overlook of the description of each video.

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.

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 blue link in the table above. Take an overlook of the description of each video.

See a new patented JET augmented vertical axis cross flow JET - Drag turbine of Savonius type at www.youtube.com/watch?v=zMhw5cAk9Ps&feature=channel.

See a new patented  JET - Lift - Drag  Transverse Horizontal Axis Water Turbine (THAWT) at: www.youtube.com/watch?v=I_tc5E8bAb4

See a Test Measurements of a JET-Lift  Blade Axial Flow Turbine in Operation at www.youtube.com/watch?v=-0QMqvg3rFw

See more at http://www.tonchev.org

Based on new invented ROTOJET fluid kinetic energy converters are developing number of wind and hydrokinetic JET rotor designs. Each of them is full scalable. JET rotor/blades concept require new line of airfoil / hydrofoil  cross section, new plan form, new pitch and twist designs, new hub etc. In addition we have developed complete new ROTOJET power system "flow - blade - rotor - drive train - electric generator - power controller/inverter" . ROTOJET power system design is easy tailored to the specific flow conditions (velocity, turbulence etc.) to achieve much better system capacity factor. Low cost power generation from free river/canal streams by Pontoon Hydro Kinetic Power Barge/Plant with 15 JET Turbines. The barge is a module of hydro kinetic power farm includes number of interconnected modules with semi submersed axis flow JET turbines. The cost of power generated is about USD 0.04/kWh. The JET turbines are world novelty that increase water-to-power efficiency significantly. The JET turbine is a radical new solution based on low cost well known technology. It is fixed blade variable rpm turbine rotating permanent magnet alternator. see a video at  www.youtube.com/watch#!v=47yepY4Mwzw&feature=channel

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

For some applications of ROTOJET power system is possible JET rotor upgrade / retrofit of the conventional rotors.

Several patented and patent pending  solutions of new invented JET rotors  you can see at www.tonchev.org/jetbladevideo.html 

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.

By new invented JET wind turbines is quite possible to double turbine power output of both axial and cross flow turbines (with same rotor diameters) at low wind velocity. Also is possible to reduce turbine spacing in Wind Farms and to guarantee the same overall energy yield as by non JET wind machines. See a comparison in operation of JET turbine vs. conventional turbine at: http://www.youtube.com/watch?v=ghp-7MqUyhs  

Всеки линк в долната таблица пряко води до видеоклипове за патентовани хибридни електроцентрали по съответната тема:

See the related video of patented (BG patents) eco-cars by clicking of each link in the table above. Take an overlook of the description of each video.

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