The World's First Commercially Viable Medium Sized Vertical Axis Wind Turbine
4NAVITAS AND SIEMENS “ UK comp mpany y 4Navita vitas Green Energ rgy y So Solu lution tions Ltd has successfu fully ly deve velop loped a a ve vertic tical axis is wind turb rbin ine (VAW AWT) which is set to REV REVOLUTIONISE the wor orld ldwid ide onshore ore wind turb rbin ine ma market rket, ” curre rrentl tly y domin inated by horiz rizon onta tal l axis wind turb rbin ines (HAWT). read more at www.siemens.co.uk
WHY BUY FROM US ? So Some of of the he rea reasons ar are: ∎ Turbine pays for itself ∎ High Reliability ∎ Easy Maintenance ∎ 20 Year Warranty ∎ Higher Energy Output ∎ Easy and Fast Installation ∎ Environmentally Friendly ∎ Quiet ∎ Radar Friendly ∎ Able to Operate in Urban/City Areas
1 TURBINE PAYS FOR ITSELF
TURBINE PAYS FOR ITSELF 1. EXCESS ELECTRICITY CAN BE SOLD BACK TO THE POWER COMPANY 2. GOVERNMENT SUPPORT PROGRAMS FOR GREEN ENERGY SOLUTIONS ARE AVAILABLE IN MANY STATES 3. FINANCING MAY BE AVAILABLE 4. 4NAVITAS CAN PREPARE A SPREADSHEET ILLUSTRATING PAYBACK OVER THE LIFETIME OF THE TURBINE
TURBINE PAYS FOR ITSELF The 4Navitas VAWT (Vertical Axis Wind Turbine) can actually pay for itself. Each month, the turbine produces enough electricity to power your farm, business or community. The money saved can be used to cover the monthly financing payments. Any excess electricity can be sold back to the power company as profit. In a number of states, Feed-In Tariffs are present, where the Government will pay you money back for using Green Energy. Excess Electricity Electricity = Generated Finance Fee
TAX CREDIT 1. FOR 2016, THE US GOVERNMENT IS OFFERING A 30% TAX CREDIT FOR PURCHASERS OF THE TURBINE. THIS TAX CREDIT IS EXTENSIBLE OVER A 20 YEAR TIME PERIOD.
TURBINE PAYS FOR ITSELF
2 HIGH RELIABILITY
HIGH RELIABILITY 1. GEARBOX ISSUES IN CONVENTIONAL HORIZONTAL AXIS WIND TURBINES
HIGH RELIABILITY 1. CONVENTIONAL TURBINES REQUIRE A NUMBER OF COMPONENTS FOR YAW AND PROPELLER PITCH 2. THE 4NAVITAS TURBINE DOES NOT NEED THESE COMPONENTS. 3. SIMPLER MEANS MORE RELIABLE
HIGH RELIABILITY The 4Navitas turbines are specifically designed to ensure low maintenance over their lifetime. The majority of operating machinery components, such as motors/gears/electronics etc are in a sealed walk-in cabin at ground level for easy access. The biggest source of failure in Horizontal Axis Wind Turbines ( HAWTs ) is the gearbox. Constant vibration on the transmission shaft reduces the lifetime of the gearbox. The 4Navitas turbines are designed with very high reliability gearboxes, thus reducing costs and downtime.
HIGH RELIABILITY HAWTs need to be able to detect when the wind changes direction, and to move the turbine blades to face into the wind. This requires sensors to detect the change, and motors to turn the turbine to face into the wind. The blades of the turbine also need to be adjusted ( pitch ). This requires sensors, a control system and motors. All of these devices can and do fail. The 4Navitas Vertical Axis Wind Turbine ( VAWT ) does not use any of these components. This leads to much higher reliability. The blades of the 4Navitas VAWT turn at only 32 rpm which reduces wear and tear on the turbine.
3 EASY MAINTENANCE
EASY MAINTENANCE 1.CONVENTIONAL TURBINES HAVE THE GEARBOX AT THE TOP OF THE TOWER. A CRANE IS NEEDED FOR MAINTENANCE 2. THE 4NAVITAS TURBINE HAS THE GEARBOX AT THE BOTTOM OF THE TOWER. NO CRANE IS NEEDED
EASY MAINTENANCE HAWTs have the generator and gearbox at the top of the tower. This means that whenever a generator or gearbox has to be replaced, a crane is required to be brought in to remove the faulty unit. Cranes are expensive to hire, and in many cases there is a waiting time for the crane to be available. During this time, the turbine is not producing electricity and money is being lost. The 4Navitas VAWT has both the generator and gearbox inside a climate controlled shelter at the base of the turbine. This provides for easy access to both devices. Routine maintenance is required only once a year.
4 20 YEAR WARRANTY
20 YEAR WARRANTY MANY TURBINE MANUFACTURERS ONLY OFFER A FIVE OR TEN YEAR WARRANTY MANY WIND TURBINE MANUFACTURERS DO NOT HAVE WORLDWIDE PRESENCE SIEMENS PROVIDE ALL OF OUR WARRANTY AND SERVICE SUPPORT SIEMENS HAS A GLOBAL PRESENCE
20 YEAR WARRANTY Warranty issues can cause major problems for wind turbine operators. There have been a number of cases reported where turbine operators have been left with a failed turbine for weeks or even months due to a shortage of maintenance staff as well as a lack of spare parts. Often, significant travel times may be involved if the manufacturer does not have representatives in the country concerned. World renowned energy experts Siemens perform all maintenance and warranty tasks. Siemens has a worldwide presence. The 4Navitas VAWT comes with a standard 20 year warranty.
5 HIGHER ENERGY OUTPUT
HIGHER ENERGY OUTPUT 1. HAWT’S ONLY TAKE WIND FROM ONE DIRECTION 2. THE 4NAVITAS TURBINE CAN TAKE WIND FROM 360 DEGREES AND TAKE ADVANTAGE OF GUSTY, TURBULENT WIND CONDITIONS
HIGHER ENERGY OUTPUT HAWTs can only take wind from one direction at a time. The 4Navitas VAWT can take wind from 360 degrees, thus dramatically increasing power output. HAWTs can only use air that is smooth flowing, otherwise vibration problems occur. In an urban or city type environment, the air flow is turbulent and often gusty. This causes problems with HAWTs. The 4Navitas VAWT can use either smooth ( laminar ) or turbulent air.
6 EASY TO INSTALL
EASY TO INSTALL Screw piling instead of concrete foundation. ● Fewer planning restrictions due to height limitation. ● Installed within 4 -5 days ●
EASY TO INSTALL Does Not Require a Concrete Base ● Planning Permission Easier ● Complete installation in 4-5 days ●
7 QUIET BIRD/RADAR FRIENDLY
QUIET OPERATION/MINIMAL SHADOW FLICKER 1. MANY CONVENTIONAL WIND TURBINES HAVE AN ANNOYING “WHOOSH WHOOSH SOUND” 2. THE 4NAVITAS WIND TURBINE IS AS QUIET AS A QUIET LIBRARY, ALLOWING OPERATION NEAR SCHOOLS, HOSPITALS, OFFICES ETC. 3. MINIMIZES SHADOW FLICKER
QUIET OPERATION • Diagram above shows typical HAWT noise profile. The 4Navitas turbine has a much lower noise profile.
MINIMAL SHADOW FLICKER
QUIET OPERATION/MINIMAL SHADOW FLICKER HAWTs are banned from many locations due to noise. The constant “whooshing” sound is annoying to anyone who lives close to the turbines. The 4Navitas VAWT is as quiet as a quiet library. Our turbine does not make the sound described previously. Shadow Flicker is a phenomenon whereby an irritating, moving shadow is cast across houses and offices that are close to an HAWT. This shadow can disturb livestock in rural settings. The 4Navitas VAWT minimizes shadow flicker.
BIRD FRIENDLY BIRDS AND BATS ARE KILLED BY THREE MEANS IN REGARD TO CONVENTIONAL WIND TURBINES: A. TRYING TO FLY IN BETWEEN BLADES B. BEING “SUCKED IN” BY VACUUM EFFECT AT PROPELLER BLADE TIPS C. HEAT FROM THE TRANSMISSION SHAFT ATTRACTS INSECTS WHICH ATTRACT BIRDS
BIRD FRIENDLY Each year, many birds are killed by HAWTs around the world. Due to a form of optical illusion, birds think that they can fly between the turbine blades. At the tips of the propeller blades, there is a low pressure region which acts like a vacuum, and can “suck” birds into the blades. Insects are also attracted to the heat generated by the transmission shaft. Birds then follow the insects, and are killed by the blades. Birds fly around the blades of the 4Navitas VAWT, instead of trying to fly through them. Our blades do not travel fast enought to generate a vacuum. Any heat generated in our turbine is at the base, well away from the blades.
RADAR FRIENDLY 1. CONVENTIONAL WIND TURBINES CAUSE INTERFERENCE TO RADAR SYSTEMS AND CANNOT BE LOCATED WITHIN APPROXIMATELY TWENTY MILES OF A RADAR IN MANY CASES 2. CONVENTIONAL WIND TURBINES CAN ALSO MAKE WEATHER RADAR SYSTEMS BELIEVE THAT THERE ARE STORMS WHEN THERE ARE NONE
RADAR FRIENDLY Many types of radar systems ( military, civilian, scientific, weather etc ) are present worldwide. HAWTs are banned from being anywhere near radar systems. This can mean within 20 miles of certain types of radars. It is estimated that 30% of all HAWT wind turbine zoning ( planning ) applications are rejected in the UK due to objections from radar operators, especially air traffic control systems. HAWTs appear as flickering interference on air traffic control radar screens. The 4Navitas VAWT appears as a solid, non-moving object on the radar screen. This is much more appealing to radar operators. 4Navitas has operated a turbine very close to a military radar in the UK with no interference.
8 ZONING PLANNING PERMISSION
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