Category Archives: Wind Energy
Radical New 5 JET Blade HAWT Horizontal Axis Wind Turbine
Radical New 5 JET Blade HAWT Horizontal Axis Wind Turbine, The hollow blade design includes blade side air inlet apertures and much smaller blade edge nozzle air outlets. Thanks to the above radical new design the power output is increased by factor 2 at low and moderate winds. The turbine self start ability is enhanced, as well. Patented design. See more at http://www.tonchev.org
Newly invented ducted 3D rotor of wind / hydrokinetic turbine
The well known horizontal axis wind / hydrokinetic turbines operate by a propeller which rotates in a vertical plane crossing normally wind / water flow. It is low efficient propellers in comparison with 3D propeller rotates in a cylindrical duct. It is low noise and bird / fish friendly rotors – see the video.
Ducted propellers are 2-3 times more efficient in the comparison with non ducted rotors with same diameter.
Patented hollow Jet blades of horizontal axis wind turbine (HAWT)
Advantages and gains of hollow Jet blades HAWT:
- a turbine of a set height could be supported by a lighter, less costly tower structure compared to the conventional design;
- if only a single three bladed rotor were employed, the gondola would be smaller, lighter and less cost;
- if two three bladed rotors are employed, more wind energy can be harvested for the same height tower.
- on marine wind turbine units, the lower centre of gravity would contribute to greater stability in severe weather;
- light weigh generator designs would no longer be required, since a less costly conventional generator would be housed at ground/sea level. Such larger, conventional generators would be less costly, with easier, less time consuming maintenance and repairs;
- single unit generators could be swapped out with only a forklift or truck hoist, compared to gondola mounted single unit generators which require large cranes to swap out.
If the design goal is to maximize the energy recovered for a given capital cost C, then increasing the tower height allows for increased power generated due to higher wind speeds. But designers have to increase the tower’s diameter and its structural strength to make significant gains in tower height, thus increasing the fabrication and construction costs of the entire project.
One method of raising tower height without requiring a significant increase in the tower diameter and structural stiffness would be by employing a guyed tower design, with guy wires, popularly used with radio towers. The upper limit of the guy wire attachments would naturally be below the bottom limit of the rotor blades.
Constructing a hollow JET turbine blade by ROTOJET design
Hydrokinetic energy holds significant promise as a new, carbon-free energy source. But known inefficient turbine designs are high barrier of their practical realization. Our innovative JET turbine design has resulted in the most efficient and highest power producing hydrokinetic turbine unit in the hydrokinetic industry. The end result is a system with significantly lower capital costs and higher capacity factors than any other river, tidal or ocean energy system.
We in the position to deploy our patented JET hydrokinetic technology at a number of projects throughout the world. Our hydrokinetic power projects that generate electricity exclusively from moving water (river currents, tidal currents and ocean currents) without having to first construct dams, impoundments, conduits or other infrastructure. The technology is also deployable downstream from existing hydropower facilities, which allows for new incremental, environmentally-friendly, renewable power generation within the existing project footprint.
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.
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.
How to extract efficiently wind power from low wind speeds?
The present invention can be applied for solving a wide range of problems both in industry, power engineering and in transport in the fields related to wind energy.
Wind energy (power) is most useful in windy areas. The conventional wind turbines operate efficient with lift blades. But they are not efficient in low turbulent wind speeds sites. In these sites used drag turbine blades. But drag blades are very low efficient in moderate to high wind speeds.
That is why we have invented and developed efficient turbine with wind/drag blade with hollow structure. Wind passes trough side blade inlets and forces in inner hollow blade part. Forced wind outlet by trailing edge nozzles as jet stream. The jet stream causes jet force that assist blade rotation. We call our new blade design JET blade.
A wind turbine airfoil JET blade includes a leading edge and a trailing edge . The JET blade has an upper shell member and a lower shell member, with each of the shell members having a forward edge bonded at the leading edge of the blade and a rearward edge.
How to assemble a wind / hybrid power plant ?
Electrical power is generated from wind and solar sources thus reducing the need for fuel oil. A wind turbine and a solar cell panel are connected to a battery bank. Both the turbine and the solar cells are stored in two standard shipping containers. When transported to the desired location, these sub-systems are easily set up for operation. The entire apparatus may be disassembled for re-transport and use at another location. Necessary container modifications to connect the system for use are made in such a way as not to alter the container’s outside envelope, thus enabling normal transport of the container without damage to the modifications. Each of the solar cells has discs attached so that the solar panel can be assembled in the field by sliding each disc into a mounting channel.
This disc and channel structure also allows each cell to be stored in the shipping container by using similar channels mounted back to back in a storage frame located in one of the containers.
The solar panel is pivotally mounted in proximity to an edge of the shipping container using mounting elements which interfit with the already provided lift fittings on the container. A wiring harness plugs each solar cell to a conduit for connection to the battery charging system
How to assemble a wind / hybrid power plant ?
Electrical power is generated from wind and solar sources thus reducing the need for fuel oil. A wind turbine and a solar cell panel are connected to a battery bank. Both the turbine and the solar cells are stored in two standard shipping containers. When transported to the desired location, these sub-systems are easily set up for operation. The entire apparatus may be disassembled for re-transport and use at another location. Necessary container modifications to connect the system for use are made in such a way as not to alter the container’s outside envelope, thus enabling normal transport of the container without damage to the modifications. Each of the solar cells has discs attached so that the solar panel can be assembled in the field by sliding each disc into a mounting channel.
This disc and channel structure also allows each cell to be stored in the shipping container by using similar channels mounted back to back in a storage frame located in one of the containers.
The solar panel is pivotal mounted in proximity to an edge of the shipping container using mounting elements which interfit with the already provided lift fittings on the container. A wiring harness plugs each solar cell to a conduit for connection to the battery charging system.
Hollow JET blades for rotors of hydrokinetic/wind turbines
An important barrier of the fast development of hydrokinetic power (and small wind turbines, as well) is the low efficiency of existing turbine design. Our new developments show that is possible to overcome said barrier by newly invented Hollow JET blades for rotors of hydrokinetic/wind turbines.
The jet blades exploit an additional rotational jet force that increase overall turbine efficiency up to two times.
Newly invented closed loop blades of an low noise urban wind turbine with horizontal axis
Three blades low noise wind-turbine, according to the invention, is intended for starting up electro generator for the purpose of production of electrical energy to feed automatic station in uninhabited areas, tourist facilities, and in urban areas as a supplement to public utilities or as an independent energy source. It consists of a rotor achieved from three curved wings spirally bent along the horizontal axis by 120 0ich is rotatable around the hollow shaft fixed in a stator.
The aim of the newly invented turbine is to be high efficient at low speed turbulent wind in urban areas.
High efficient diagonally bladed wind turbine rotor
The main barrier of the fast development of the small wind applications of power is the low efficiency of existing turbines in urban environment. The new developments show that is possible to extract more power with Diagonal bladed wind turbine rotor.
