Virtually noise-free Eco Whisper Turbine unveiled
Brisbane's Renewable Energy Solutions Australia (RESA) recently unveiled the first working installation of what is claimed to be the world's quietest wind turbine. The Eco Whisper Turbine is capable of producing 20kW of electricity despite being about half the height and having half the blade diameter of more familiar three-bladed solutions, and is able to automatically adjust the position of the blades to maximize wind capture.
Much of the noise produced by small wind turbines occurs when air spills off the tip of the blades but thanks to a unique cowl/ring design, the Eco Whisper Turbine is said to benefit from near-silent operation. RESA says that its design can produce more than 30 percent more energy than other turbine solutions over a wide range of wind conditions - that translates to up to 45,000 kWh per year in optimum conditions.
The company expects its grid or off-grid green energy solution to meet the medium to high power needs in urban and rural applications like airports, business parks, commercial sites and universities. The company's Michael Le Messurier reports that interest from the industry has been overwhelming since the first installation was recently unveiled at Austeng Engineering in Geelong, Victoria.
Standing 21.1 meters (69.225 feet) tall from tip to toe, a 6.5 meter (21.325 foot) diameter blade sits at the top of a hinged steel pole that can be lowered for maintenance or during extreme weather conditions - although the structure is designed to withstand wind speeds of up to 220 km/h (136.7 mph). The central hub and the 30 blades that fan out from it are made from aluminum, and the solution incorporates dynamic slew drive technology that negates the need for a tail.
Other noteworthy benefits of this turbine development include a low start up speed and high visibility that should help the local bird population avoid injury.
The following video shows the Eco Whisper Turbine in action:
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I would say that most of the noise is generated by interactions between multiple windmills, just like most of the noise a helicopter makes is a result of the interaction between rotors.
Hard to believe that there have been no advances in the past 65 years. And the politicians are on that nonsense bandwagon and those in Canada have incurred the wrath of the voting populace then they iced up last winter and were shut down. Take their initial low efficiency and slice that in half you then you might get it.
The problem is that the blades are designed as wings meant to fly. But time and again we have seen that the best performers operate on another principle called resistance. Spinnakers operate quite differently in principle than mainsails.
Resistance is the answer as we see here and in the Honeywell Design by Windtronics.
But no one has matched the efficiency in design of Bill Allison who achieved the Betz Limit of 59%. And Allison\'s fans were very quiet.
Here we also see what Bill discovered the inner 1/3 is useless in extracting energy.
All three, Allison, Windtronics, and Eco Whisper are made of metal. Allison insisted in stainless steel for strength and weather resistance. Bills test confirmed that dead flat highly polished blades extracted the greatest amount of energy.
Amazing that no academic institution has established a testing facility to compare and determine which design is actually the most efficient.
Unless things have changed since I went to school efficiency is the holy grail.
Do you really believe that all the big wind energy companies haven\'t looked at Bill Allison\'s data and found it wanting.
The actual number of birds killed by windmills is lower by an order of magnitude than the official numbers.
It\'s easier for some people to believe in a conspiracy than to admit that the concepts they love don\'t work.