Windrotor Bolotov (WB) – innovative solution, designed to transform the kinetic energy of wind flow into clean electricity.
The wind turbine consists of three main components, technically jointed to each other:
- Wind turbine
- The Hybrid WB 5 kWt solution (see the photo Ground installation)
VERTICAL AXIS WIND TURBINE : WINDROTOR BOLOTOV (WRTB/VRTB)
Vertical wind turbine.
Barely rotating under the load. Wind speed 6-7 m/s
Wind direction and Wind Speed.
What is value of benefits gives the omni directional wind turbine (VAWT) compared with propellers (HAWT) any kind of you systems?
Answer. 1,2-1,8 times more relatively to electricity production and 3-4 times less relatively maintenance cost.
Energy Storage System for a Sustainable Power Supply.
ESS is a smart battery system that has fast charge using electricity generated from wind turbine, solar panels, and powers your needs by your demand.
Adjustable capacity (kWh) for a specific inquiries.
Research and Development
The monitoring system
We designed functional monitoring for remote data collection. Our monitoring system allows you to keep records of data and monitor the object`s key indicators in real time mode.
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The WB MPCT is a highly reliable wind turbine controller - battery charger and its most critical feature is to maximize the harvest energy from the 3-Phase wind turbine into the battery by using the advanced technology of MPCT. The controller allows direct maximum power coefficient tracking for winds of entire range speeds.
The wide range of the input generator’s voltage and output battery voltage are well applied to the wind system to allow system planner to produce the most of the wind energy. The input voltage range of the WB MPCT family may be wired in the range of 0 ~ 220 VAc nominal and the Maximum Automatic Brake Function is 300 Vdc.
WB MPCT may not only well be used in wind off-grid systems but also in wind hybrid systems.
Maximum Wind Turbine Capacity
Charging 96 Vdc Batteries 8 KW
Charging 48 Vdc Batteries 4 KW
Charging 24 Vdc Batteries 2 KW
Charging 12 Vdc Batteries 1 KW
Multi-blade WRTB turbine with smooth rotation will withstand gusty wind under load.
Lab Tested :: Tunnel Tested :: Field Tested
Confused with wind direction
Why the efficiency of propeller windmills are low and rarely exceed 17 %.
One of the main answer is changing wind direction that hard to "catch" for propeller. What solutions are known: tail, peach, stall ? Ok, but the same 17% !
WRTB turbine has a similar power curve as conventional wind power turbine, but having combination of design factor and advanced technologies, the turbine is more efficient in harvesting wind energy.
Existing wind turbines solutions may divide into 2 major groups:
- Horizontal Axis Wind Turbines (HAWT) - propeller wind mills
- Vertical Axis Wind Turbines (VAWT) - windrotor
Historical, only propeller windmills HAWT are widely in use. These solutions have blades (1,2 or 3) of complex shape, an expensive speed reducer and a controlling system needed to optimize the orientation of the mill and blades, when the direction and speed of wind change. Medium and small windmill systems are using just a primitive yaw devise to “catch wind”. According to the Bets law, only 59% of kinetic energy of the wind can be converted into mechanical energy. However, because of quick changes in wind speed direction and the turbulence effect, the controlling system of propeller windmills is unable to provide optimal settings fast enough. As a result, kinetic energy of the wind can be converted by HAWT turbine into mechanical power with ratio about 10-25 % and this power can be transform into output electric energy with ratio about 50-69 %. (different types of reducers, friction oil, electric scheme and generator).
Propeller windmills needs in wind stream of stable condition and perpendicular direction flowing to a working profile of blades. This requirement is very crucial for propeller windmills because of any changes in wind direction leads to a lower efficiency of power extraction out of wind. As a result high price (kW-h) of energy output.
The team of the research center has highly skilled workers, professionals with extensive experience in R & D on various types of topics. As the driving force of the entire R & D center analyzes, testing and selection of the most promising solutions, providing the company's leading position among its competitors. Among specialists are Dr. and candidates of sciences. The presence of the research center can not only be a leader in the field of technical superiority of of implemented systems, but also to properly plan the economic and financial activities of the company.
The Offered Solution
The offered solution - Windrotor Bolotov is a vertical axis wind turbines (VAWT) with a high conversion ratio. It can be manufactured using standardized assembly modules and parts and also has low maintenance cost. WEI Windrotor is designed as a rotor turbine with a vertical axis. Kinetic energy of the wind can be converted by WEI windrotor’s wind turbine into mechanical power with ratio about 42 % and this power can be transform into output electric energy with ratio about 92-94%. Using a unique stator-rotor solution that accelerates wind speed, absence of a reducer and specific electrical generator and scheme, ensures these facts, which are very good for the industry. The turbine is modular in the sense that it output can be increased by changing height (adding standard modules with “pads”). The solution can operate in much wider wind speed range than propeller windmills and its energy effectiveness is also higher (please see diagrams). Another advantage of the presented solution is that the generator, gearbox, etc. are placed on the ground. Because of simplicity of construction the maintenance cost ration is much lower than for propeller windmills. Comparing of (HAWT) propeller and (VAWT) "WB" type WINDMILLS was based on data obtained through experiments conducted in the same geographic location of the Middle Asia having yearly wind speed distribution values in hours as shown in diagrams below. Paradox: The average of the cube of many different wind speeds will always be greater than the cube of the average speed. The reason for this paradox is that the single number representing the average speed ignores the amount of wind above as well as below the average. Ability to capture all range of wind energy from various winds is a "corner stone" of "WEI windrotor" machine (Fig.2 & 3)
Turbine Components (see the wind turbine diagram)
Windrotor Bolotov turbine components include:
1) Blades of the rotor convert the wind energy in rotating the shaft;
2) Blades of the stator, direct and accelerate the air flow to the rotor’s blades;
3) A generator box and a generator are designed for a counter rotation function of 2 modular blades system (upper and lower module);
4) A “tower”- foundation that supports the windrotor’ machine;
5) Electrical enclosure with other equipment, including controller, electrical cables, batteries, and interconnection equipment.
Installation of large-scale windmills is conditional upon availability of a goof quality road to transport heavy turbines and cranes, which are used for turbine’s placement and maintenance. Also needed is a well developed electrical infrastructure. The purchase prices for cranes as well as maintenance costs are very high. Often is this consideration left out of attention at the first-time discussion of the project. Besides, one should add up the price for expensive cables and automated system phone lines to be laid. If a few small-power windmills are installed, they add up to provide an adequate power supply for the region while reliability of power generation strengthens for a windmill as a whole. It is a particularly valuable asset in case of unexpected damage sustained by or a lightning hitting one of the units.
VAWT Windrotor Bolotov and Integrated power systems based on them have been granted long-term application in a variety of macro-climatic conditions and are most effective. Completed more than 100 projects in the field of alternative energy, using Windrotor Bolotov equipment designed and manufactured of various lineup. Places of extreme exploitation: Yenisei Bay (annual average wind speed of 10 m / s,-50 C), "Dzungarian gate" (annual hurricanes up to 47 m / s), the islands of Finland Bay (wind speed of 30 m / s, moist air at sub-zero temperatures). A perspective direction in terms of exploitation and economy are energy complexes with an installed capacity of converters of alternative wind and solar power into electricity: up to 100 kW.Field of application - as a power supply source for telecommunication equipment, lighthouses, hydrometeorological service , technical monitoring points. Below shows the pictures from successful testing at the Korean Aerospace Institute KARI (South Korea).
At the forefront of advancements in efficiency and sustainability, VRTB is turning proven experience and innovative thinking into exceptional results in projects around the world.
WINDROTOR BOLOTOV POWER CURVE (REAL FIELD TESTING)
Since 2001, Bolotov has been actively engaged in provisioning the best and most reliable technology in wind, solar and hybrid solutions for the power generation market
S= 6.2 m2. Wind speed 13 m/s. P=3000 Wt
The Vertical-axis windturbine (WINDROTO) Windrotor Bolotov is 30 % more effective in wind energy harvesting compare with most of other small wind turbines and characterized by the following indicators:
The Windrotor - visually calm and safe source of energy that corresponds to highest sanitary standards, which has no external moving parts or irritating effects.