Treasury Dept. Fingers SolarCity in Exploration of the Dark Underbelly of Solar Leasing
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SolarCity in Exploration of the Dark Underbelly of Solar Leasing
5-Blade 500W Max/12V - Low Wind Model
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| Wind turbine (Photo credit: Wikipedia) |
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| English: A size comparison of wind turbines (Photo credit: Wikipedia) |
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| Icon of Wind Turbines (Photo credit: Wikipedia) |
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| English: The three primary types of wind turbine--Savonius and Darrieus vertical axis wind turbines (VAWTs) and a standard horizontal axis wind turbine (HAWT)--all with three blades, are spinning as if they are in operation in real wind. They are spinning at the same speed (mathematically); 30 rpm. (Photo credit: Wikipedia) |
Advantages of 5-blade wind turbines over 3-blade wind turbines
1) 5-blade wind turbines will greatly improve annual energy production in low wind conditions. For areas with average wind speeds of 11 MPH (5m/s). If you compare annual energy output to conventional 3-blade wind turbine, there is an increase of annual energy output of more than 60%.
2) 5-blade wind turbines will dramatically improve the reliability and safety in high speed wind conditions. The blade rotation speed of a 5-blade turbine is 60% of the rotational speed for a 3-blade wind turbine. 5-blade wind turbines will greatly reduce chance of overspeed control malfunction. This will ensure operational reliability from a long term perspective.
3) The lower blade rotation speed of 5-blade wind turbine will lower wind turbine noise and make 5-blade wind turbines more community friendly than 3-blade wind turbines. Nylon-Fiber Glass High Efficiency blades is aerodynamically designed to regulate themselves, slowing automatically in high winds.
1. Strong Neodymium magnet PMA, the unique winding and multi pole design reduces the start-up torque of the alternator that assures generator to generate electricity at low wind speed. 4.5 mph start up wind speed.
2. Electric over-speed control, no more problematic mechanical furling.
3. Innovative low maintenance two-moving-part system design.
4. Easy to Install, Light Weight and highly reliable.
5. Generator: The generator is built using high-performance rare earth neodymium permanent magnets, so the alternator is compact and light weight with a high power generating efficiency. Number of Blades: 5 Blade Diameter: 4.6 Feet Rated 400W @26 mph More Energy Output at low wind than 3-blade models Max Wind Output: 500W
- Innovative 5-blade design to maximize energy output at low wind conditions under 25 mph.
- 60% MORE energy output at LOW wind than 3-blade turbine
- Reliable two-moving-part matainenance free design, Nearly silent operation
- Controller Electric speed limitation, blade over-speed braking
- Strong Neodymium magnet PMA, Nylon fiber composite blades
Vestas low-wind 3 MW wind turbine V126-3.0 MW turbine
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| English: Vestas V80 Wind turbine in Simmersfeld Windpark (Photo credit: Wikipedia) |
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| Vestas V90-3MW wind turbine nacelle (Photo credit: Wikipedia) |
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| Vestas wind turbine, Dithmarschen. (Photo credit: Wikipedia) |
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| Propellerblatt over (Photo credit: hmboo) |
The turbine is the latest variant of the 3 MW platform on which the V112-3.0 MW is built. Vestas will continue to optimise this platform in order to offer further options to the customers.
The new V126-3.0 MW turbine has a rotor diameter of 126 metres to target low wind conditions (i.e. wind class IEC III) and features a structural shell blade design. The well-known blade design halves the capital investment in new production lines, improves flexibility in manufacturing, and at the same time maintains the reliability and high quality of Vestas’ turbines.
The V126-3.0 MW turbine is mainly targeting the European markets. In August 2010, Vestas released the first turbine in its new 3 MW platform, the V112-3.0 MW turbine, which has been very well received by the market, resulting in an intake of firm and unconditional orders of more than 3 GW since the release.
Anders Vedel, Executive Vice President, Turbines R&D said: “The rotor swept area of the new V126-3.0 MW wind turbine has been increased by 27 per cent and the turbine is specifically designed to yield maximum power production on low wind sites. There is a huge need for larger rotor sizes in the low wind market, particularly in Europe, and the V126-3.0 MW offers a new option for customers who want to combine the proven technology and serviceability of the 3 MW platform with greater power output in low wind sites. Furthermore, the structural shell blade design halves the investments in new production lines.”
The first prototype of the V126-3.0 MW turbine is expected to be installed in Østerild in Denmark during the second quarter of 2013.
To learn more about the new turbine, please follow this link:
www.worldofwind.vestas.com/presentations/v126_ca.
The new V126-3.0 MW turbine has a rotor diameter of 126 metres to target low wind conditions (i.e. wind class IEC III) and features a structural shell blade design. The well-known blade design halves the capital investment in new production lines, improves flexibility in manufacturing, and at the same time maintains the reliability and high quality of Vestas’ turbines.
The V126-3.0 MW turbine is mainly targeting the European markets. In August 2010, Vestas released the first turbine in its new 3 MW platform, the V112-3.0 MW turbine, which has been very well received by the market, resulting in an intake of firm and unconditional orders of more than 3 GW since the release.
Anders Vedel, Executive Vice President, Turbines R&D said: “The rotor swept area of the new V126-3.0 MW wind turbine has been increased by 27 per cent and the turbine is specifically designed to yield maximum power production on low wind sites. There is a huge need for larger rotor sizes in the low wind market, particularly in Europe, and the V126-3.0 MW offers a new option for customers who want to combine the proven technology and serviceability of the 3 MW platform with greater power output in low wind sites. Furthermore, the structural shell blade design halves the investments in new production lines.”
The first prototype of the V126-3.0 MW turbine is expected to be installed in Østerild in Denmark during the second quarter of 2013.
To learn more about the new turbine, please follow this link:
www.worldofwind.vestas.com/presentations/v126_ca.
Advanced Blade Design Wind Turbines
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| English: View of Fan blades of JT8D Jet engine after a bird strike Türkçe: Bir JT8D Jet motorunun Kuş çarpması neticesinde hasara uğramış fan pallerinin görünümü (Photo credit: Wikipedia) |
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| Blades (Photo credit: Velo Steve) |
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| Evolution of the Airfoil (Photo credit: NASA on The Commons) |
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| English: Transonic tunnel fan blades, with light reflections. Grady McCoy is shown standing next to the fan blades. (Photo credit: Wikipedia) |
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| English: View of Fan blades of JT8D Jet engine after a bird strike Türkçe: Bir JT8D Jet motorunun Kuş çarpması neticesinde hasara uğramış fan pallerinin görünümü (Photo credit: Wikipedia) |
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| Messed up fan blades. (Repairing a broken mixer) (Photo credit: mskogly) |
Airfoil fan blades provide efficiency and low noise using classic airfoil design
Airfoil impellers have a round leading edge, a sharp trailing edge, and in profile or cross section. As air approaches the blade’s leading edge, the stream splits and travels above and below the blade. Air is deflected across the convex curve along the top of the blade and along the flat or concave curve on the bottom of the blade, and flows downward over the sharp trailing edge as it leaves the blade.
According to Bernoulli’s Principle, the faster moving air across the top of the blade creates less pressure than the slower moving air on the bottom of the blade. This creates lift in an airplane wing or airflow in an impeller. Airfoil impellers function just like a series of small airplane wings attached to a hub, with one notable exception. In axial fans, the airfoil’s twisted design ensures that the incident angle between the airfoil and the airflow is constant along the blade length, giving a uniform blade loading for high efficiency, low noise fans.
Most efficient design in optimized conditions
- Twisting the blade reduces vortex shedding along the profile
- Airfoil blade provides low power consumption
- Cooling tower fans, radiator fans, HVAC fans, refrigeration fans
- Diameter range of 8-108 inches
The high efficiency blade design has also made Multi-Wing’s airfoil profiles a great answer for the challenges of the Tier IV emissions standards. The 4Z, 5Z and 6W blades each can be tailored as an engine cooling fan, a condenser fan, a radiator fan or an oil cooler fan. In fact, select airfoil fans have the narrow axial depth necessary to provide the required cooling performance in the tight engine compartments that result from Tier IV. As one of the nation’s premier heat transfer products firms noted in their seminars on Tier IV requirements, “Outside of the core, the fan is the most important component of the cooling package.”
The Future of Outdoor Lighting: How it Works
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| English: Global Wind Power Cumulative Installed Capacity (Data source: GWEC, Global Wind Report Annual Market Update 2010http://www.gwec.net/index.php?id=180) (Photo credit: Wikipedia) |
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| wind power (Photo credit: twicepix) |
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| Image via CrunchBase |
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| HUSUM, GERMANY - SEPTEMBER 19: Visitors stand in front of a display showing wind power stations at the HUSUM 2012 Wind Energy Trade Fair on September 19, 2012 in Husum, Germany. Germany is investing heavily in onshore and offshore windparks as the country moves to increase its portion of energy derived from renewable sources. (Image credit: Getty Images via @daylife) |
- UGE wind turbines are highly versatile and able to create energy in a wide variety of settings.
- Solar panels complement the system or act alone, and control the ON/OFF of the LED.
- An efficient LED illuminates the street, parking lot, or path below.
- The decorative tower allows for space to be used for education or advertising.
- Batteries in the enclosure provide 3-5 days of back-up energy storage.
Westpro Scandinavia
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| monokristalline Solarzelle (Photo credit: Wikipedia) |
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| English: President Barack Obama talks at the DeSoto Next Generation Solar Energy Center (Photo credit: Wikipedia) |
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| MUENCHEBERG, GERMANY - SEPTEMBER 04: A worker installs solar panels containing photovoltaic cells at the new Solarpark Eggersdorf solar park on September 4, 2012 near Muencheberg, Germany. The park, which is being built by German solar energy operator juwi Solar GmbH, will contain 85,000 solar modules and is one of many similar projects in eastern Germany. Germany is investing heavily in renewable energy projects, especially solar, wind and biogas ventures, as the country is in the ongoing process of closing down its nuclear energy plants. (Image credit: Getty Images via @daylife) |
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