Wind power plant air duct and method of manufacturing the same

1. An air duct for a wind power plant comprising:

a body having an outer circumference and configured to guide air along a circumference of a supporting tower structure of the wind power plant; and

a plurality of air inlets in the body, the plurality of air inlets each protruding from the outer circumference such that the plurality of air inlets are configured to extend through a wall of the supporting tower structure,

wherein the body is configured to be located inside the supporting tower structure along an inner side of the wall of the supporting tower structure, and

wherein the body is a separate member from the supporting tower structure configured to be fixed to the supporting tower structure such that the body is not integral to the wall of the supporting tower structure.

2. The air duct according to claim 1 , wherein the body is located inside the supporting tower structure, and is positioned along an inner side of the wall of the supporting tower structure.

3. The air duct according to claim 2 , wherein the plurality of air inlets are evenly distributed around the circumference of the supporting tower structure.

4. The air duct according to claim 1 , wherein the body has a polygonal cross-section.

5. The air duct according to claim 4 , wherein the polygonal cross-section comprises two opposite V-shape cross-sectional portions.

6. The air duct according to claim 1 , wherein the body is comprised of a plurality of segments.

7. The air duct according to claim 6 , the body is comprised of a first set of segments comprising a plurality of first segments each comprising an inlet, and a second set of segments comprising a plurality of second segments to couple first segments to each other, and a third segment to couple the body to an internal vertical tubular air guiding structure.

8. The air duct according to claim 1 , wherein the body is comprised of a first segment comprising an inlet, and a second segment to couple to the first segment, and a third segment to couple the air duct to an internal vertical tubular air guiding structure.

9. The air duct according to claim 1 , further comprising a fixed structure to couple the body to the supporting tower structure, wherein the fixed structure is at least one brace or a frame to support the body.

10. The air duct according to claim 1 , wherein the body includes at least two segments wherein adjacent segments have flanged ends and wherein adjacent or consecutive segments are fixed to each other.

11. The air duct according to claim 1 , further comprising an air duct suspension, wherein the air duct suspension is a belt.

12. The air duct according to claim 1 , wherein segments of the body are made of at least one of glass-fiber, plastic, and polymer.

13. A wind power plant comprising:

a supporting tower structure; and

an air duct configured to guide air along a circumference of the supporting tower structure of the wind power plant, the air duct including a plurality of air inlets in a body, the body including an outer circumference, the plurality of air inlets each protruding from the outer circumference and extending through a wall of the supporting tower structure, wherein the air duct is configured to be located inside the supporting tower structure along an inner side of the wall of the supporting tower structure, wherein the air duct is a separate member from the supporting tower structure configured to be fixed to the supporting tower structure such that the air duct is not integral to the wall of the supporting tower structure.

14. A method of manufacturing an air duct comprising the step of:

assembling an air duct of a plurality of segments, wherein at least two of the plurality of segments are identical, the air duct including a body having an outer circumference; and

configuring the air duct as a separate member from a supporting tower structure of a wind power plant such that the air duct includes a plurality of air inlets in the air duct protruding from the outer circumference of the body, the air duct being adapted to be attached to the supporting tower structure of the wind power plant along an inner side of a wall of the supporting tower structure and having the air inlets extending through the wall of the supporting tower structure, without the air duct being integral to the wall of the supporting tower structure, so as to guide air along a circumference of the supporting tower structure.

15. The method according to claim 14 , further comprising assembling the air duct within the supporting tower structure of the wind power plant.

16. A method of retrofitting an existing wind power plant comprising the step of:

installing in the existing wind power plant an air duct for the existing wind power plant, the air duct including a body having an outer circumference, the air duct including a plurality of air inlets protruding from the outer circumference, the air duct being a separate member from the existing wind power plant prior to the installing; and

fixing the air duct to a supporting tower structure of the existing wind power plant along an inner side of a wall of the supporting tower structure and having the air inlets of the air duct extend through the wall of the supporting tower structure without the air duct being integral to the wall of the supporting tower structure, so as to guide air along a circumference of the supporting tower structure of the existing wind power plant.