received by the I nternational Bu reau on 04.1 2.201 7

1. Solar air system comprising:

at least one air duct for heat transfer, having a predetermined cross-section of the air duct, wherein the cross-section of at least one air duct is fixed along its entire length and,

- an air inlet duct in fluid connection with the air duct, to supply air to the air duct for heat transfer, the air inlet duct having a predetermined cross-section of the air inlet duct, , and characterized in that

it comprises at least one vortex generator assembly (A, B, C) comprising a vortex generator (26) consisting of at least one resonator plate (26), the vortex generator being located at the inlet of the straight section of the air duct (A-l, B-l, C-l) for heat transfer,

the vortex generator assembly (A, B,C) further comprising a fan system with at least one radial fan (33), the resonator plate

(26) being an elastic plate rigidly fixed at one side, the air outlet from the radial fan 33 being the inlet duct 44, with a cross-section smaller than the cross-section of the air duct, and being positioned in the same plane as the air duct to supply to the resonator plate (26) a laminar air stream having velocity from 6 m/s to 12 m/s, the air outlet from the radial fan (33) and the resonator plate (26) being positioned in such a way, that the air from the air outlet from the radial fan

(33) is supplied to the resonator plate (26) at an angle of 30° to 60°, so that, a generator trailing edge (32) of the resonator plate (26) changes air flow from laminar to turbulent with vortices and do that the resonator plate (26) moves freely to transfer additional kinematic energy to air particles.

2. System according to claim 1, characterized in that the system comprises three parallel air ducts (A-l, B-l, C- l)each separated by a bulkhead (22) and splitting up from the straight section of the one air duct at the inlet of which the radial fan (33) is located.

3. System according to claim 1, characterized in that the system comprises three parallel air ducts (A-l, B-l, C-l), each separated by a bulkhead (22), and each having the radial fan (33) located at the inlet of its straight section.

4. Solar air system according to any of the claims 1-3, characterized in that the ratio of the cross-section of the inlet duct (44) to the cross-section of the air duct is from about 1:2 to about 1:5, preferably about 1:4.

5. Solar air system according any of the claims 1-4, characterized in that the outlet from the radial fan (33) is oriented perpendicularly to the main axis of the air duct (A- 1, B-l, C-l) and the plate resonator (26) of the vortex generator assembly (A, B, C) is oriented at an angle in relation to the bulkhead (22)

6. Solar air system according to any of the claims 1-5, characterized in that the plate resonator (26) of the vortex generator assembly is oriented in parallel to the baffle (22) and the outlet from the radial fan (33) is oriented an at angle to the main axis of the air duct.

7. Solar air system according to any of the claims 1-6, characterized in that the fan system includes at least one suction duct (37) to introduce additional volumes of air into the system.

8. Solar air system according to any of the claims 1-7, characterized in that the plate resonator (26) is provided with means for angle adjustment in relation to the air stream.

9. Solar air system according to any of the claims 1-8 characterized in that the air duct is of meandered shape and comprises at least two rectilinear sections (A1-A2, A2-A3, Bl- B2, B2-B3, C1-C2, C2-C3) .

10. Solar air system according to claim 9, characterized in that additional plate resonator (26), is positioned at the beginning of the second and/or subsequent rectilinear section (A-2,B-2, C-2, A-3,B-3,C-3) of the meandered shape air duct.

11. Method of thermal transfer in the solar air system, characterized in that the solar air system according to any of the preceding claims 1 - 10 is used.