Systems and methods for tethered wind turbines

• US 7,775,761 B2
• Filed: 01/25/2008
• Issued: 08/17/2010
• Est. Priority Date: 05/03/2005
• Status: Expired due to Fees

• Current Assignee: Magenn Power, Inc.
• Original Assignee: Magenn Power, Inc.
• Inventors: Ferguson, Frederick D.
• Primary Examiner(s): Nguyen; Ninh H
• Application Number:
  US12/019,872
• Publication Number:
  US 20080181773A1
• Time in Patent Office: 935 Days
• Field of Search: 415/7, 415/4.5, 415/4.3, 415/908, 416/4, 416/84, 416/85, 416/142, 290/44, 290/55, 244/10, 244/21, 244/31, 244/33, 244/36, 244/153.A
• US Class Current: 415/7
• CPC Class Codes: F03D 13/20 Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
• CPC Class Codes: F03D 3/002 the axis being horizontal
• CPC Class Codes: F03D 3/062 characterised by their construction elements
• CPC Class Codes: F03D 9/25 the apparatus being an electrical generator F03D9/22 takes precedence
• CPC Class Codes: F05B 2240/201 using the Magnus-effect
• CPC Class Codes: F05B 2240/212 of the Darrieus type
• CPC Class Codes: F05B 2240/917 attached to cables
• CPC Class Codes: F05B 2240/921 kept aloft due to aerodynamic effects
• CPC Class Codes: F05B 2240/922 kept aloft due to buoyancy effects
• CPC Class Codes: Y02B 10/30 Wind power
• CPC Class Codes: Y02E 10/728 Onshore wind turbines
• CPC Class Codes: Y02E 10/74 Wind turbines with rotation axis perpendicular to the wind direction

Abstract

According to some embodiments, systems and methods for tethered wind turbines may be provided. In some embodiments, a system may comprise an airborne body extending horizontally along an axis between a first point and a second point, wherein the body is at least partially filled with a gas. The system may further comprise, for example, two or more vanes coupled to the body such that the vanes, when acted upon by a wind force perpendicular to the axis are operable to cause the body to rotate about the axis to generate a Magnus effect lifting force. According to some embodiments, the system may comprise one or more tethers coupled to anchor the body to a third point.

Claims

1. A system, comprising:

an airborne body extending horizontally along an axis between a first point and a second point, wherein the body is at least partially filled with a gas;

two or more vanes airborne with the body such that the vanes, when acted upon by a wind force perpendicular to the axis are operable to cause rotation of the body about the axis;

one or more tethers coupled to anchor the body to a third point; and

one or more electrical generators airborne with the body to convert rotational energy produced by the rotation about the axis into electrical energy.

2. The system of claim 1, wherein the rotation caused by the wind force comprises rotation of the body about the axis and the body is primarily held aloft by a Magnus effect lifting force generated by the rotation.

3. The system of claim 1, wherein the body defines an envelope pressurized with the gas.

4. The system of claim 3, further comprising:

a ballonet disposed within the envelope to regulate the pressure of the gas.

5. The system of claim 1, wherein the one or more tethers comprise one or more electrical cables to transfer the electrical energy toward the third point.

6. The system of claim 1, further comprising:

one or more stabilizers coupled to facilitate orientation of the axis perpendicular to a prevailing wind force.

7. The system of claim 6, wherein the one or more stabilizers comprise a stabilizer integral to the body.

8. The system of claim 7, wherein the integral stabilizer defines a portion of an envelope pressurized with the gas.

9. The system of claim 8, wherein the integral stabilizer is inflatable.

10. The system of claim 1, further comprising:

an end plate coupled to the body at each of the first and second points on the axis, wherein each of the end plates comprises a securing point disposed on the inner surface of the end plate.

11. The system of claim 10, further comprising:

a structural member extending substantially along the axis and coupled to each of the securing points of the end plates.

12. The system of claim 1, further comprising:

a Darrieus-type rotor coupled to the first and second points and operable to rotate about the axis and around the body when acted upon by the wind force perpendicular to the axis.

13. A method, comprising:

deploying a tethered wind turbine, wherein the tethered wind turbine comprises;

an airborne body extending horizontally along an axis between a first point and a second point, wherein the body is at least partially filled with a gas;

two or more vanes airborne with the body such that the vanes, when acted upon by a wind force perpendicular to the axis are operable to cause rotation of the body about the axis;

one or more tethers coupled to anchor the body to a third point associated with a ground station; and

one or more electrical generators airborne with the body to convert rotational energy produced by the rotation about the axis into electrical energy;

receiving electrical energy at the ground station from the tethered wind turbine; and

transmitting the electrical energy for use in powering one or more electrical devices.

14. The method of claim 13, further comprising:

converting the electrical energy into a different form prior to transmitting the electrical energy for use.

15. The system of claim 13, wherein the tethered wind turbine is primarily held aloft by a Magnus effect lifting force.

16. The system of claim 13, wherein the body of the tethered wind turbine defines an envelope pressurized with the gas.

17. The method of claim 16, wherein the deploying comprises:

pressurizing the envelope with the gas.

18. The system of claim 13, wherein the tethered wind turbine further comprises:

one or more electrical generators coupled to convert rotational energy produced by the body rotating about the axis into the electrical energy.

19. The method of claim 13, wherein the deploying comprises:

raising the tethered wind turbine into a wind to allow a Magnus effect lifting force to carry the tethered wind turbine aloft.