Residential JET Wind Turbines

Advanced JET Wind Converter Technology

Advancements in wind turbine technology have been growing rapidly. In the shadows of multi-megawatt wind turbines is another growing sector within this industry: residential wind. Improved airfoil designs for maximum efficiency at low wind speed, high efficiency direct drive permanent magnet alternators, improved governing methods and highly sophisticated controls and inverters now allow home owners to interface directly with utility companies or design off-grid systems. These systems are increasing energy independence, competing with current energy prices and reducing environmental impacts.

One important consideration in designing a wind turbine is matching the tip speed ratio (TSR) of the airfoils to the alternator/generator. The TSR is the speed of the tip of the airfoil relative to the velocity of the wind. Although having a high TSR might be advantageous in keeping airfoil cost down due to the requirement of thinner blades as well as the need for a smaller alternator due to a higher rpm rotor, this usually results in machines with shorter life cycles and noisier airfoils. Designing wind turbines with low TSR means that chord width of the airfoil can be increased making them more efficient at low wind speeds and lower rpm resulting in a quiet, longer lasting turbine. This aids in maximizing low wind start-up speed and increases energy production at the low end of the power production curve. The new invented JET blade turbine design increased turbine performance at low wind speed and the turbine capacity factor. The new patented JET wind energy converter is called to answer the problems caused by low efficiency and high investment costs of the conventional wind power facilities.

In addition to new blade design, alternators have also been advancing in their efficiency and capabilities. Neodymium magnets are now being used in most every modern alternator design for small scale wind turbines. These high strength rare earth alloy magnets consist of neodymium, iron and boron (Nd2Fe14B) plus other doping ingredients to increase coercively and improve oxidation characteristics. These magnets are resistant to demagnetization, and have a much higher flux density than plastic, ceramic, or alnico magnets. This results in alternators with a higher flux density that can produce more power then an alternator of an equal size using Ferro or other magnets. Other improvements such as high quality laminate to reduce iron losses, tight air gap tolerances and low induction winding configurations to reduce cogging torque all add to increasing alternator efficiency

Controlling a wind turbine’s power output and rotor speed can be one of the largest challenges for designers and manufacturers. Without proper controls wind turbines are not able to achieve their maximum efficiency and run the risk of over speeding in high winds and damaging the equipment. Electronic controls load the alternator to keep the rotor at peak power for the wind speed unless the desired maximum power level has been exceeded. Controllers also enable as much power as possible to be put into the batteries, consistent with preserving battery life in battery charging systems. The power that exceeds available battery load will be diverted to a heat load, which can be a standard water-heating element allowing end users to utilize energy that would otherwise be dissipated as waste heat. Charge controls can be temperature compensated and have adjustable set points for extreme environments and custom charging capabilities. These controllers are using pulse-width modulation to control the amount of power sent to a diversion load.

Advanced control enables small wind turbines to interface directly with the utility grid without the use of a battery bank. Several inverters are now available to directly interface with a machine’s controller and synchronize with utility voltage and frequency with very little conversion losses. Both SMA and Magnetek have been on the leading edge of manufacturing high voltage inverters designed to interface with small wind turbines. This required inverter manufacturers to provide power control algorithms suitable for small wind generators. These grid connect inverters provide maximum power point tracking in a highly efficient battery-less system ideal for net metering applications. This enables consumers utilizing the utility grid to sell their excess energy back to the utility for the same price the utility charges their consumers. Combining several or all of these advancements in wind turbine technology can result in quieter, longer lasting and more efficient turbines. Implementing these technology advancements is not without it’s price.The new invented JET blade turbine design aerodynamically reduced and stabilized rpm by high speed winds and avoided any expensive, pitch regulations, costly smart inverters, sophisticated rpm and load controls.

The quantitative advantages of new invented JET turbines summarized below:

The JET blade improves energy capture at lower wind speeds. The JET design allows the blade to respond to turbulent gusts in a manner that lowers fatigue loads on the blade. By periphery JET blade channels each prop blade tip designed as not end blade. End less blade avoids tip blade energy losses. It increases turbine efficiency by factor of 1.2  See end less JET prop blade at this video: http://www.youtube.com/profile?user=miscbeep#p/u/14/bWoLchq3EME

JET blades formed JET streams in opposite direction of the blade rotation. As a result respective JET forces augmented blade rotation. The centrifugal forces (by rotation) increased JETstream flows behind blade tips. It increases turbine efficiency several times at low wind speeds.

Tip blade arrangements by rotation formed virtual diffuser like structure around blade tips. It increases turbine efficiency by factor of 1.6 in average.

Tip blade arrangements reduced rotor efficiency at moderate to high wind speeds but it compensates by the virtual diffuser.

The cost of new invented wind turbine is up to 40% low than any sophisticated wind turbine with same capacity factor.

Over all result is 20 times more efficient prop at low wind speed. It is result is not because additional blade area only. It is well known that low area blades are not self starting at low wind speeds. In the same conditions new invented blade/prop operates very efficient by full load. See video comparison of conventional vs. JET blade prop in action at: http://www.youtube.com/profile?user=miscbeep#p/u/14/bWoLchq3EME

The invented radical new JET technology of primer wind energy converters are applicable in both axial and cross flow wind generators. See pictures of the new types of helical cross flow drag/JET turbines (VAWT) and tornado type transparent VAWT on the bottom row of the pictures below:

You can see below pictures of  patented low noise high efficient horizontal axis JET wind turbine and VAWT . The shown turbine designed for operation at low wind speed and high turbulence. Under turbine rotor a pyramid like structure directed additional wind to rotor swept area. End less JET tip blades avoid tip energy loses and reduce noise significantly. Solar-PV panels are fitted on sunny side of the bottom pyramid structure. Synergy effect - the panels generate power and energized wind. Applications: Residential and general power plants. See a video of Solar PV-Wind power plants at http://www.youtube.com/watch?v=KNptaLkgjYI

See a video of High Way power plant for battery charging of electric cars/vehicles and plug-in hybrid cars at http://www.youtube.com/watch?v=oAwwQz8uHWw

The new invented transparent blades tornado type turbines (see a video here) are applicable in Hybrid Solar PV-Wind power plants and for battery charging of electric and hybrid cars and trucks, as well.

Several helical JET/Drag VAWT can formed KINETIC SCULPTURES. See three VAWT as a KINETIC SCULPTURE at: http://www.youtube.com/watch?v=AOJmNplqQ0w Other new invented JET turbines in action see at: www.b2b.bg/new.html

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

The Small Scale JET Wind Turbines are perfect to reduce electricity costs in private home as well as the commercial environment. They are low noise, low vibrations, low cost, low visual pollution machines. They produce low cost power and not require frequent and expensive maintenance. Wind Power is a clean form of energy generation and JET Wind Generators have a minimal impact on the environment. They designed for the ‘small wind’ market - for example, for homes, buildings, schools, roof mounted turbines and farms (as opposed to the ‘big wind’ market of commercial wind farms).

All innovative technologies and related machines are designed by computer simulations and approved in the practice, before patent applications. Every patent combines several innovative solutions aiming a synergy effect. As an example is ROTOJET inventions related to cross flow and axial flow Horizontal Axis Wind Turbine (HAWT) and hydrokinetic blades/rotors, as well.

For official carbon dioxide reducing patent publications see here