Above: Nature as a Template. The Helix design of the wind turbine! Extensive wind tunnel tests and numerical flow calculations were used to develop and optimize an ultra-lightweight slow speed vertical small wind turbine system, using the highest possible levels of efficiency and based on the Savonius rotor. For months, we developed, calculated and optimized this innovative rotor form which enables a higher yield of the oncoming wind.
The new wind turbine follows the classic Savonius idea, but has a new innovative rotor geometry, which thanks to an intelligent flow design, avoids pressure differences, outages and turbulence. The wind turbine Wind of Change with its characteristic helical shape has an increase in output of more than 28 percent in complex 3D aerospace engineering flow analysis tests, when compared with conventional vertical resistance runners.
Ultra-lightweight rotor made from modern high-performance composites, consisting of two horizontal lens discs, attached to a vertical rotor axis, between which two or more semicircular curved blades are vertically mounted. The blades are arranged offset from one another, so that a part of the wind is diverted from the right and left openings to the scooped sides of the blades and can therefore act on the reverse side of one of the concave blades.
The action is based both on aerodynamic lift as well as resistance induced tunneling. The spiral structure of the helix design ensures that even during turbulence, the wind can have an effect on every part of the surface area. The shape of the helix was inspired by nature Bionics and resembles the human DNA structure. Video: Flow mechanics calculations and analysis of the wind flow velocities in the Savonius rotor.
The developed vertical axis helical rotors have the following advantages over conventional systems with a horizontal axis:. Helix Wind Turbine Wind of Change installed on an office building. The aim of our investigations was to determine the noise level from the generator and the Helix Wind turbine relative to the wind speed, for individuals who live or work in the immediate vicinity. In cooperation with Grass Power Electronics GmbH, ib process control engineering GmbH and the University of Nuremberg, power electronics have been specifically developed for Helix Wind Turbine Wind of Change, which control the optimum interplay of wind power, speed and power feed.
A special low-speed generator is integrated in the lower lens body of the wind turbine system, to produce a direct connection from the wind turbine to the generator. The electricity produced by the newly developed generator, is fed 3-phase with VAC into the power converter.
The generator power converter then switches the power to VDC, which flows into an intermediate voltage circuit. Communication interfaces enable the connection and transfer of the data to PC via Ethernet and remote system access via the Internet. Intelligent power electronics with safety features. In normal use the power electronics convert the current so that it can be fed into the household consumer unit or the national grid.
In case of error, the power electronics act intelligently:. The connection of a wind sensor is possible. There are two analogue options to connect the wind sensor:. The DSP controller board has two free current inputs.
The level can be adjusted via a small operational amplifier circuit at the input. The communication board has an input level of Here, the input level can be adjusted from V via a switch.Helix Wind was a renewable energy company founded in that specialized in producing and installing vertical axis wind turbines in the United States.
Originally stationed in California, Helix Wind was a company which targeted to deliver high quality, efficient, and cost effective, environment-friendly power solutions to both residential and commercial consumers alike. Helix Wind suffered from major management, service and quality issues; until finally, in Mayit had stopped operations and all its assets and intellectual property were sold to Sauer Energy, another green energy company.
Despite being short lived, Helix Wind had shown the potential of becoming a leader in the green energy industry. The products it sold were considered unique for its kind and had the capability of providing efficient energy to their clients. The turbines had scoops or aerofoils, arranged around a vertical shaft that was turned by the wind, making it look like a large corkscrew in motion. In the market, Helix Wind offered two different models of wind turbines, each of which were designed to accommodate to the specific energy needs of residential and commercial consumers alike.
The first model was the S Turbine: a small vertical axis wind turbine primarily designed to cater to the needs of residential houses and small commercial businesses. The S was capable of delivering 2. Helix Wind markets the S is perfect for those who simply wanted to have an environment friendly backup power source or to simply cut energy costs. The second model was the S Turbine, which had twice the size and twice the power of the S Perfectly designed for those in need of more energy, the S was capable of delivering up to 4.
As the name implies, the WTMS was a system designed to allow consumers to monitor how much energy they were producing and consuming.
10 Wind Turbines That Push the Limits of Design
It also displayed the temperature, wind speed and other related environment variables—making it as an ideal purchase with the turbines. The most notable project that Helix Wind got involved in was the empowerment of cell phone towers in US and Africa with vertical axis wind turbines. The project kicked off at October and was established to target to reduce cell phone tower operating costs and CO2 emissions in the environment.
There were no news whatsoever whether the project was completed successfully or not. To conclude, despite being a has-been company, Helix Wind had briefly showed the potential of becoming a market leader in the green energy industry.
The products it sold were raved and talked about by consumers and obviously were at par with the current trend in green energy. A few tweaks in sales, management and quality assurance could have saved the company from the unfortunate situation they had gotten into. Your email address will not be published.
Search for:. Leave a Reply Cancel reply Your email address will not be published. Designed by illuminatheme. Powered with WordPress.Harnessing wind power for use in residential applications has been a challenge, but a new breed of vertical axis wind turbine VAWT from Helix Wind offers a promising design that may change the way we do wind at home. The Helix Wind Savonious 2. The rotor measures 6ft by 4ft 1. The capabilities of the rotor to spin in any wind make it ideal for urban settings.
Interesting thoughts and comments. Keeps in mind that the sun only works when the sun is up. Nothing ever works by itself. You have to almost always use something else in conjunction with it. So Solar and wind with hydro and grid tie as a last resort Wind in general is one of the poorest methods for power generation.
Pros Free Cons not free, intermitentunreliable, not even close to being cost efective. Solar and geothermal are the only way to go green. Look at the life cycles of this system. Because one ran for a week, month,year or five years. We need systems that can run for fifety years, be tuned up and run for another fifety. We need stone age tech. No I don't mean build more hydro.The company says this new blade design could increase annual electrical production for existing wind farms by 20 percent.
Too much tilt, however, has the opposite effect--a loss of lift, called stalling. Tubercles prevent stalling, allowing for more aggressive fin tilts. WhalePower's tubercle-like structures on the turbine blades allow the blades to have steeper angles--without causing stalling or creating too much drag. During low wind, blades with steeper angles can theoretically generate significantly more power.
Wind tunnel tests published by Frank Fish, president and founder of WhalePower, and by Duke University fluid dynamics expert Laurens Howle in showed that, in some cases, adding tubercle-like bumps to model fins pushed back the stall angle by as much as 40 percent. A Canadian ventilation company, Envira-North Systems, will be the first to use tubercle technology in industrial fans.
The qr5's helical design allows the turbine to collect wind from all directions equally. At the end ofover 70 turbines had been installed throughout the United Kingdom, where each unit generates between and kilowatt-hours per year, according to the company.
This foot tall, 4-foot wide turbine generates kilowatts per hour given mph winds, and it can survive winds up to mph. It generates power when wind spins its vertical airfoils.
For example, the Michigan governor's residence has a wind turbine, and Quinnipiac College in Connecticut is planning to use the turbines on campus to help power its buildings. It can be tethered up to feet in the air.$30 DIY Kilowatt Wind Turbine - Build Tutorial v1.2 - cronopoison.pw
The rotation generates electricity, which is transferred down the power line, which doubles as its tether, to the ground. Suggested locations for the turbine include off-shore drilling stations, islands, and mining sites. The goal is to help the poor power their lights cheaply and safely. Its unique airfoil lets it produce power at low wind speeds. The Sky Serpent's rotors are spaced and angled to ensure that each one is catching fresh wind. Type keyword s to search. Today's Top Stories.
Quiet Revolution qr5.
Spiral Drag Wind Turbine. Sky Serpent.
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Is Fracking Safe?Helical wind turbines have grown in popularity recently especially for home and urban use. Many helical wind turbines look like DNA structures, large drill bits or other spiral designs which catch the wind and produce electricity. Another advantage of the helical wind turbine design is that many times slow minimum wind speeds are needed in order to get the device rotating. Typically, helical wind turbines are designed along a vertical axis.
Vertical axis wind turbines are generally gaining popularity for residences and urban settings because they can be placed lower to the ground and on rooftops. Another advantage of the helical wind turbine is that it generally can be used in areas with higher wind speeds where bladed turbines would need to be shut down for safety reasons.
Three of the popular manufacturers of the helical wind turbine include Helix, QuietRevolution and Wind Wanderer. Helical wind turbines can be mounted on rooftops, in yards, at airports or other settings depending upon the exact design and application. They can be tower mounted or mounted close to the base. Another advantage of the helical wind turbine is bird safety.
In recent years, manufacturers of utility scale horizontal axis bladed wind turbines have come under fire for killing birds especially in migratory paths. With a helical wind turbine, bird issues have rarely been a concern. Helical wind turbines are also less susceptible to problems with crosswinds than bladed turbines and they require no tail-fan to keep them pointed in the optimal direction.
Helical Wind Turbine Helical wind turbines have grown in popularity recently especially for home and urban use. The helical wind turbine is said by manufacturers to be quieter than bladed turbines because of slower speeds along the blade tips.All rights reserved.
Helix's wind turbines, seen here at the Burning Man festival inillustrate the aesthetic appeal of vertical axis wind technology, but critics of the concept say it has too many flaws to be viable. With graceful, sail-like blades that turned in the wind like white corkscrews, Helix Wind 's vertical axis wind turbines VAWTs captured the imagination of bloggers and the tech press in The San Diego-based company developed a polished website and at the height of its promise, delivered two of its turbines to the Nevada desert for the annual arts and self-reliance festival, Burning Man, in The Helix turbine whirred above the vegetable-oil-fueled art cars and recycled sculptures.
The gyre ceased on May 11, when Helix Wind was forced to auction off all its assets. But in a statement at the time of the purchase, Dieter Sauer, the company's chief executive, said his firm was interested in acquiring Helix's unique turbine designs and proprietary monitoring software.
He added that Sauer would not assume any of Helix's liabilities. But another firm that has risen from Helix's ashes is writing the next chapter in vertical axis wind technology. Venger Wind, started by Helix founder Kenneth Morgan, whose acrimonious split from the firm ended in litigation, has now picked up some of Helix's contracts, including a high-profile installation on the Philadelphia Eagles' NFL stadium. Morgan told National Geographic News that the experience at Helix left him feeling "betrayed.
It almost destroyed the industry for vertical axis wind turbines. It was pretty sad. Although Helix Wind had received a considerable amount of positive press, the company's filings to government investment regulators told a story of financial woes. When the news of Helix Wind's demise broke in April, critics of vertical axis wind turbines pounced. Gipe and other critics argue that vertical turbines are inherently inefficient compared to the horizontal turbines that dominate the market.
They say the very aspect that lends vertical turbines their appeal—their compact, "rooftop" size—further erodes their already small potential for performance, as proximity to buildings cuts down wind flow. All long-term successful wind-electric manufacturers use horizontal axis designs. This is because they work. Woofenden added that he is "baffled" by all the recent attention given to VAWTs by venture capitalists, inventors, and the media—all ignoring the warnings of "longtime experts in the industry.
Starting out with a flawed design and flawed assumptions virtually guarantees failure. All of this is a distraction from the real wind industry, and a waste of resources.
HELIX WIND TURBINE: Small Wind Gets Smart
Savonius, the Finnish engineer who invented the form in The turbines have scoops, or aerofoils, arranged around a vertical shaft, and they are turned by the wind. Unlike most modern wind turbine blades, the scoops do not generate lift, so they can go only as fast as the wind. That's a hindrance because, in general, the faster the blades turn, the more energy a turbine can harvest from the wind.
As a result, Savonius wind turbines are said to have much lower efficiency than most horizontal axis wind turbines HAWTsor advanced VAWTs like the Darrieus rotor, which resembles an egg beater with its twisted blades that generate lift.
Gipe and Woofenden said that, contrary to VAWT marketing materials, there is no scientific evidence that they are any safer for birds or bats. They also point out that the entire wind industry is so diminutive compared to the rest of our built environment that it poses a relatively tiny threat to wildlife. Gipe said it is misleading for makers of VAWTs to tout their product as performing well in turbulence or having "low cut-in speeds.Edison Patent Award. GHT was invented by Alexander M.
Gorlovprofessor of Northeastern University. The physical principles of the GHT work  are the same as for its main prototype, the Darrieus turbine, and for the family of similar vertical axis wind turbines which includes also Turby wind turbineaerotecture turbine, Quietrevolution wind turbineetc. GHT, Turby and Quietrevolution solved pulsatory torque issues by using the helical twist of the blades.
The term "foil" is used to describe the shape of the blade cross-section at a given point, with no distinction for the type of fluid, thus referring to either an " airfoil " or " hydrofoil ". In the helical design, the blades curve around the axis, which has the effect of evenly distributing the foil sections throughout the rotation cycle, so there is always a foil section at every possible angle of attack. In this way, the sum of the lift and drag forces on each blade do not change abruptly with rotation angle.
The turbine generates a smoother torque curve, so there is much less vibration and noise than in the Darrieus design. It also minimizes peak stresses in the structure and materials, and facilitates self-starting of the turbine. Overall, these technologies represent the current norm of tidal current development.
The main difference between the Gorlov helical turbine and conventional turbines is the orientation of the axis in relation to current flow. The GHT is a vertical-axis turbine which means the axis is positioned perpendicular to current flow, whereas traditional turbines are horizontal-axis turbines which means the axis is positioned parallel to the flow of the current.
Fluid flows, such as wind, will naturally change direction, however they will still remain parallel to the ground. So in all vertical-axis turbines, the flow remains perpendicular to the axis, regardless of the flow direction, and the turbines always rotate in the same direction. This is one of the main advantages of vertical-axis turbines. If the direction of the water flow is fixed, then the Gorlov turbine axis could be vertical or horizontal, the only requirement is orthogonality to the flow.
The GHT operates under a lift -based concept see airfoil. The foil sections on the GHT are symmetrical, both top-to-bottom and also from the leading-to-trailing edge. The GHT can actually spin equally well in either direction. The GHT works under the same principle as the Darrieus turbine; that is, it relies upon the movement of the foils in order to change the apparent direction of the flow relative to the foils, and thus change the apparent "angle of attack" of the foil.