EP 1969229 A1 20080917 - A WIND POWER PLANT WITH EXTRA SET OF BLADES
Title (en)
A WIND POWER PLANT WITH EXTRA SET OF BLADES
Title (de)
WINDKRAFTANLAGE MIT ZUSÄTZLICHEM SCHAUFELSATZ
Title (fr)
CENTRALE EOLIENNE AVEC JEU SUPPLEMENTAIRE D AUBES
Publication
Application
Priority
- DK 2006000641 W 20061120
- DK PA200501626 A 20051121
Abstract (en)
[origin: WO2007057021A1] The present invention relates to a wind power plant with a first set with at least one blade mounted on a shaft and at least one second set with at least one blade mounted on the same shaft and mounted such that the blade sets will have the same direction of revolution and the same number of revolutions. The second set of blades has a length which is smaller than that of the first set of blades and has another optimal tip speed ratio than the first set of blades, whereby the two sets of blades are optimised with regard to power output at the same number of revolutions. The ratio between the lengths of the two sets of blades can be determined approximately by the ratio between the optimal tip speed ratios of the two sets of blades. Alternatively the second set of blades can be constructed to have an optimal tip speed ratio, which is determined on the basis of the ratio between the length of the two sets of blades and the optimal tip speed ratio for the one set of blades. The two or more sets of blades can be placed either right behind each other or in the same rotor plane and, according to the invention, the two sets of blades can be constituted by a small wind rose and a larger fast-runner. The invention further relates to use of such wind power plant.
IPC 8 full level
CPC (source: EP US)
F03D 1/025 (2013.01 - EP US); F03D 1/0608 (2013.01 - EP); F05B 2240/2211 (2013.01 - EP); F05B 2240/30 (2013.01 - EP); F05B 2270/20 (2013.01 - EP); Y02E 10/72 (2013.01 - EP)
Citation (search report)
See references of WO 2007057021A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007057021 A1 20070524; DK 176357 B1 20070924; DK 200501626 A 20070522; EP 1969229 A1 20080917
DOCDB simple family (application)
DK 2006000641 W 20061120; DK PA200501626 A 20051121; EP 06805579 A 20061120