Device for the utilisation of wave energy and a method

摘要

The invention relates to a device for the utilization of wave energy, with an increased efficiency. Thereto, the device according to the invention comprises
a Darrieus rotor having at least two Darrieus rotor blades, wherein the Darrieus rotor has a solidity σD, anda Wells rotor having at least two Wells rotor blades, wherein the Wells rotor has a solidity σW,

wherein
the Darrieus rotor and the Wells rotor are rotatable about a common axis of rotation A, andσW is larger than or equal to σD.;The invention also relates to a method for harnessing wave energy.

主权项

1. A device for the utilisation of wave energy, which device comprises
a Darrieus rotor having at least two Darrieus rotor blades, wherein the Darrieus rotor has a Darrieus solidity (σD) calculated under the formula σD=N·Adb/Ad, wherein
N=the number of Darrieus rotor blades;Adb=the surface area of each Darrieus rotor blade; andAd=the effective cross-sectional area of the Darrieus rotor sweep; and a Wells rotor having at least two Wells rotor blades, wherein the Wells rotor has a Wells solidity (σW) calculated under the formula σW=N·Awb/Aw, wherein
N=the number of Wells rotor blades;Awb=the surface area of a Wells rotor;Aw=the effective swept surface area of the Wells rotor;wherein
the Darrieus rotor and the Wells rotor are rotatable about a common axis of rotation with the effective cross-sectional area of the Darrieus rotor sweep containing the common axis of rotation and with the effective swept surface area of the Wells rotor being perpendicular to the common axis of rotation, and the Wells solidity (σW) is larger than or equal to the Darrieus solidity (σD).