Cumulative generation of electricity from the wind of passing vehicles and natural wind in the Bukhara region of the Republic of Uzbekistan

. Wind energy occupies are a rather important place in the balance of global "green" generation. Wind energy directly depends on the wind speed in the region under consideration. The highest average wind speed during the year is observed in the Bukhara region of the Republic of Uzbekistan. Vertical wind generators are widely used to collect the energy of natural wind and air movement generated by traffic into electricity. In order to effectively use the power of natural wind and air turbulence that occurs during the movement of vehicles, it is proposed to install vertical wind generators on the side of highways of international importance in the Bukhara region at certain intervals of the road.


Introduction
When vehicles move, pressure waves and air rarefaction occur.Wind energy occupies a fairly important place in the balance of global "green" generation, but until now turbines are installed mainly in coastal areas, where the wind is constant and stronger.For this purpose, it is advisable to use vertical wind generators.Advantages of vertical wind generators over traditional ones: • Application of innovative silent and vibration-free technologies; • Application of highly efficient methods for obtaining and converting wind energy into electrical energy; • The optimal profile of the wind wheel blade allows achieving wing efficiency close to ideal, regardless of the wind direction (independent "guidance" to the wind direction); • The vertical wind generator does not require routine maintenance or repair.The design does not contain parts with rubbing surfaces, with the exception of the wind wing thrust bearing, which has a three-hundred-fold safety margin; • Highly resistant to strong winds, stable enough to withstand hurricane force winds; • The controller-converting system allows you to charge the battery at very low generator speeds.This makes it possible to consume previously generated energy during periods of calm; • Requires a minimum of space for placement, is absolutely harmless due to the absence of radiation, vibration and noise pollution; • Possibility of installation without damaging landscape views, bird-safe design; • Fast installation and maintenance; • The main advantage of wind turbines is its independence from main energy networks, autonomy of production and consumption of electricity.The relative simplicity of the device, the versatility of the equipment, and the accessibility of transportation and installation make it possible to build wind power stations in the most inaccessible areas remote from power supplies.
Among vertical wind generators, the following groups of rotors can be distinguished: orthogonal, Savonius, Darrieus, Helicoid, multi-bladed with a guide vane.The main advantage of vertical wind generators is that there is no need to orient them towards the wind.
Orthogonal wind generators.Orthogonal vertical wind generators have a vertical axis of rotation and several blades parallel to it, located at a certain distance from it.The advantages of orthogonal wind generators are: there is no need to use guiding mechanisms in their design, since the operation of these installations does not depend on the direction of the wind; Due to the vertically located main shaft, the drive equipment can be located at ground level, which greatly simplifies its operation.
Wind generators with Savonius rotor.Two or more half-cylinders are used as blades in the Savonius rotor.The Savonius rotor is characterized by high starting torques, operation at relatively low speeds and relatively high manufacturability of its production.Currently, wind generators with a Savonius rotor are produced in a power range of up to 5 kW.The Savonius rotor is also often combined with a Darrieus rotor to provide higher starting torques for the Darrieus rotor.
Wind generators with Daria rotor.Wind generators with a Darrieus rotor have a vertical axis of rotation and two or three blades, which are a flat strip that does not have a characteristic aerodynamic profile.The advantages of the Daria rotor are: the absence of a wind orientation system; technological simplicity of manufacturing blades; the ability to place drive equipment at ground level, which greatly simplifies its maintenance.
Wind generators with a helicoidal rotor.The helicoidal rotor or Gorlov rotor (its second name) is a modification of the orthogonal rotor.Due to the twisting of the blades, the rotation of the rotor is more uniform, which significantly reduces the dynamic loads on the support units and, thereby, increases their service life, compared to the support units of orthogonal rotors; however, the production technology of twisted blades becomes much more complicated, which affects the increase their cost.
Wind generators with a multi-blade rotor with a guide vane.Multi-blade wind generators with a guide vane are a modification of an orthogonal rotor.They have two rows of blades, the first row is stationary, it is a guide vane, the purpose of which is to capture the wind flow, compress it with increasing speed, and supply the wind flow at an optimal angle of attack to the second row of blades, which a rotating rotor.The advantage of this type of rotor is its higher operating efficiency compared to other vertical wind generators; work at low wind speeds.The disadvantage of this rotor is its higher cost due to the use of a large number of profiled blades.
The Turkish company Deveci Tech has fundamentally changed the approach to the issue, showing that wind energy can be collected directly on city streets or intercity highways.Engineers from Istanbul have created a vertical wind turbine called ENLIL (named after the Mesopotamian god of wind and storms), which is powered by air currents created by fast-moving cars.The turbulence from passing heavy vehicles and buses causes the windmill to rotate even more, and the vertical arrangement of the long blades ensures maximum flow capture [1-5].
Enlil turbines take up very little space on the ground and are easy to assemble, disassemble and operate.The turbine is connected to a generator, and the energy produced can be fed into the grid or stored in batteries until it is needed.In addition to roadsides and railway tracks, such turbines can be installed on embankments, rooftops and parks.But according to the developers, the location next to busy traffic is optimal, since the almost constant flow of cars ensures uninterrupted operation of the installation [6][7][8][9].
The development of ENLIL turbines was carried out by Istanbul Technical University and the technology company Devecitech.

Experimental research
Average wind speed values for regions of the Republic of Uzbekistan during the year are given in As can be seen from this table, the average wind speed throughout the year in the Bukhara region of the Republic of Uzbekistan meets the requirements for the installation and operation of wind power plants [10][11][12][13].

Fig.3. Average wind speed throughout the year in
Bukhara region.
It is advisable to install wind turbines on the sides of highways in the region.The total length of roads of international importance in the Bukhara region is 540 km, and of national importance 1155 km.
Since the intensity of vehicle traffic on highways of international importance is higher than on other roads, we will consider issues related only to highways of international importance.It is proposed to use the Chinese wind generator Axies Wind SR -600/800 as a wind turbine.The efficiency of such wind generators is very high [14][15][16][17][18][19][20].

Research results
The power of the air flow created by natural wind is: where Cp is the wind energy utilization coefficient.For the selected wind turbine we have Cp = 0.19; v -air flow speed, m/s; S -swept area, m2.For the selected wind generator S = 2 m2.If wind turbines are placed one on each side of the road, then the total energy output on both sides of the road will be: Then the amount of electricity generated by one pair of wind turbines per year is: S sum = S nat + S flow = 600 · 458.9 sum = 275340 sum If we install one pair of wind turbines for every 100 meters of international highways in the Bukhara region, we will get a wind farm of 1080 wind turbines.
Then the total energy generated by the wind farm of wind turbines per year is:

Conclusion
1.In order to effectively use the air turbulence that occurs when vehicles move, it is proposed to install wind generators along the side of the road at a certain interval of the road.
2. It is proposed to use the Chinese-made Axies Wind wind generator as a wind generator.
3. Electric energy generated by the method of obtaining electricity from natural wind and from the wind of passing vehicles can be used to illuminate highways and bus stops.

Fig. 4 .
Fig.4.Wind generator Axies Wind SR -600/800Table 3 shows the technical characteristics and price of Axies Wind wind generators of two modifications.
sensitive and begin to generate energy at a speed of 2 m/s.It is also designed to be connected to the network.Assume that the wind turbines operate normally due to natural winds, and assume that the natural generation is due to the wind turbines.According to the results of the study, the speed of the air flow created by a passing car is about 60 km/h or 16.67 m/s  0.19 • 1.226 • 2 • 16.67 2 1371.12 During the travel time of the car, that is, 0.267 seconds, we have the actual electrical energy received: E=P t , W·s E=1371.12· 0.267=366 W·s Then we get 152.5 Wh of energy from 1500 cars per day from the intersection, and this energy per year is equal to: E = 152.5 · 365 = 55.66 kW·h.For example, when installing 2 devices on both sides of an intersection, we get the following energy output: E flow = 2 · 55.66 = 111.3kW·h.The power of the air flow created by natural wind is: Electricity produced by one wind turbine per year due to natural wind:

Table 1 Table 1 .
Average wind speed values in the regions of the Republic of Uzbekistan during the year No.

Table 3 .
Technical characteristics and price of Axies Wind wind generators.