The subject of the invention is an amplifier of wind power in vertical axis wind turbine, which, when combined with a rotor, is used to convert the kinetic energy of the wind into the rotational energy of the rotor, enabling its use with devices for generating electrical energy.

Vertical-axis wind turbines typically have lower efficiency in converting wind energy into electrical energy compared to commonly used horizontal-axis turbines. However, they also have numerous advantages such as simple construction, start at low wind speeds regardless of their direction, and quiet and safe operation.

The limitation of these solutions is the operation of only one half of the horizontal cross-section, rotating in the direction of the wind, while the other half operates in the opposite direction to the wind.

Airflow directing shields are known from the Russian description RU2736680C1 , Chinese description CN114370371A, Russian description RU2693554C1 , and European description EP2514964A1. The blade covers known from the above patent descriptions have a rectangular cross-section.

Wind power plants equipped with blade directing systems, also called guide vanes, mounted on the periphery of the structure around the rotor chamber at a certain angle to its vertical cross-sections, are also known. They direct the wind flow into the rotor chamber area while reducing the wind's effect on the slowing-down area, thereby increasing the efficiency of such power plants. Such and similar solutions are known from patent descriptions PL65995Y1 , JP2002130110A, CN205677762U, and many others.

The current state of knowledge describes solutions with low efficiency and performance of vertical-axis turbines compared to horizontal-axis turbines. The aim of the invention is to improve the parameters of vertical-axis turbines. Additionally, it is desirable to utilize low and medium wind speeds, including strong turbulent flow, for efficient electricity production. Therefore, it is necessary to simultaneously organize, direct, and accelerate the airflow velocity entering the rotor chamber area relative to the wind speed outside the structure, as well as reduce the impact of wind turbulence on the device's efficiency.

The amplifier of wind power in vertical axis wind turbine consists of two truncated cones directed towards each other with their truncated vertices, with centrally located openings for the rotor axis. The truncated cones are connected jointly or disjointly by guide vanes. The guide vanes have a cross-sectional shape of a figure expanding towards the vertical axis of the amplifier and correspond to the shape of the vertical cutouts. It is obvious to those skilled in the art that the function of the truncated cones can also be performed by domes or segments of a sphere.

Advantageously, the truncated cones are connected by guide vanes located in the vertical cutouts of the side surface of the truncated cones.

Advantageously, the cross-sectional shape of the guide vanes is a triangle with a base formed by a segment of the surface of a cylinder or a shape formed by wavy lines with a base formed by a segment of the surface of a cylinder.

Advantageously, the ratio between the width of the slots formed by the guide vanes on the outer and inner circumference of the amplifier is 3:1 , with a ratio of the outer diameter of the amplifier to its inner diameter being 3:2.

Advantageously, the areas covered by adjacent guide vanes do not overlap.

Advantageously, the number of guide vanes ranges from six to twelve.

The guide vanes narrow the area of wind interaction with the turbine rotor blades simultaneously in the vertical and horizontal directions, thanks to the profile narrowing of the guide vanes and their placement in truncated cones.

Direction of airflow from the outside towards the rotor chamber causes the air entering the chamber and hitting its blades to be significantly accelerated compared to the wind speed outside the power amplifier. The amplifier gives the air stream the desired working direction and increases its speed. At the same time, by shielding the rotor's deceleration area from the wind, it creates a partial vacuum on the outside, partially sucking the air from the rotor chamber. This ensures the least disturbed airflow with the highest power intake, resulting in high efficiency and energy performance of the wind power plant when using any type of vertical axis rotor. Due to the arrangement of guide vanes around the entire circumference of the rotor chamber, the power amplifier does not require adjustment relative to the wind direction. This is a safe and silent design. Due to the specific construction, the rotor cannot accelerate to excessive speeds, allowing the power plant to operate continuously even in strong and very strong winds. Wind power plants using this design can make significantly greater use of low and medium wind speeds than other types of turbines. This is particularly important in areas where energy generation from the wind has been economically unfeasible so far.

After narrowing the vertical and horizontal dimensions of the air inlet gap into the rotor working area, the turbine power can be calculated using a simplified formula commonly used for approximate calculations of wind power plants:

P = 0.5 * p * A * Cp * (V * Vph * Vpv) ³ where:

P - power of the wind power plant p - air density

A - wind attack surface area on the rotor blade

Cp - Betz coefficient (expressed as a fraction, the degree of conversion of wind kinetic energy into rotational kinetic energy of the rotor)

V - wind speed

Vph - coefficient for increasing the airflow velocity horizontally - (6)/(7)

Vpv - coefficient for increasing the airflow velocity vertically - (8)/(9)

According to the above formula, the increase in wind power depends exponentially on the air speed acting on the rotor blades. Therefore, if the cross- sectional area of the airflow entering the rotor chamber is three times smaller than the cross-sectional area of the external wind flow entering the power amplifier, the airflow velocity entering the rotor working area will be three times higher than the wind speed outside (V * Vph * Vpv), resulting in a ninefold increase in power.

The subject of the invention is illustrated in the drawing, where Fig. 1 shows an axonometric view of the power amplifier, Fig. 2 shows the side view of the power amplifier, Fig. 3 shows the power amplifier in cross-section A-A, Fig. 4 shows the top view of the power amplifier without the upper truncated cone with guide vanes in a triangular cross-section, Fig. 5 shows the top view of the power amplifier without the upper truncated cone with guide vanes formed by wavy lines, Fig. 6 shows the cone with cutouts, Fig. 7 shows a guide vane in an axonometric view, Fig. 8 shows a guide vane in a side view, and Fig. 9 shows the obtained results presented in the table on a chart.

Example 1. The power amplifier for vertical axis wind power plants was manufactured using 3D printing technology. The amplifier consists of two truncated cones 1 with their truncated vertices facing each other. The diameter of the base of cone 1 was 14 cm, and the diameter of the truncated vertex was 9.2 cm. The distance between the truncated vertices was 10.2 cm, and the outer height of the guide vanes was 14 cm. There were six vertical cutouts 6 on the side surfaces of the truncated cones 1 , shaped to match the cross-sectional profiles of the guide vanes. The truncated cones 1 were connected together exclusively by six guide vanes 2 placed in the vertical cutouts of the truncated cones 1. The guide vanes 2 had a triangular cross-section that expanded towards the vertical axis of the amplifier, with a base formed by a section of the cylinder surface. The proportion between the width of the gaps 3 formed by the guide vanes on the outer circumference and the gaps 4 on the inner circumference of the amplifier was 3:1 , with a ratio of the outer diameter to the inner diameter of the amplifier being 3:2. The areas covered by the adjacent guide vanes 2 did not overlap. Inside the amplifier, there was a Savonius-type rotor with a diameter of 9 cm and a height of 10 cm, equipped with two blades (5) stabilized horizontally with magnetic bearings and vertically with needle bearings.

Example 2. A similar power amplifier was made, but the cross-sectional shape of the guide vanes was formed by wavy lines with a base formed by a section of the cylinder surface.

Example 3. For comparative purposes, an experiment was conducted to measure the parameters of the rotor without guide vanes under the same conditions as in examples 1 and 2.

Example 4. For comparative purposes, an experiment was conducted to measure the parameters of the rotor with flat guide vanes of rectangular crosssection under the same conditions as in examples 1 and 2. The amplifiers according to examples 1 to 4 were tested in terms of the number of rotor revolutions per minute. The results obtained in examples 1 to 4 are presented in the Table:

Table