| 摘要 |
A system (100) for generating energy from a flow of a fluid is proposed. The system comprises energy conversion means (110), sail means (165) switchable between an active condition for being carried away from energy conversion means by the fluid flow and a passive condition in which such carrying away is minimized. The system further comprises connection means (120,155) for connecting the sail means with the energy conversion means, the energy conversion means converting part of a kinetic energy provided to the sail means by the fluid flow into said energy when the sail means in the active condition are carried away from the energy conversion means, recovery means (110) for recovering the sail means in the passive condition towards the energy conversion means, and switching means (145, 170L, 170R) for switching the sail means from the passive condition to the active condition and from the active condition to the passive condition upon the reaching of a first distance and a second distance, respectively, of the sail means from the energy conversion means, the second distance being greater than the first distance. In the solution according to one embodiment of the present invention the switching means comprise a telescopic structure (145), and the connection means comprise a first cable structure (120) connected between the telescopic structure and the energy conversion means and a second cable structure (155) connected between the telescopic structure and the sail means, the first cable structure and the second cable structure winding onto the telescopic structure and unwinding from the telescopic structure alternatively during each switching of the sail means between the passive conditions and the active condition for varying an extension of the telescopic means between a shortened extension in the passive condition in which an unfolding of the sail means is reduced and an elongated extension in the active condition in which the unfolding of the sail means is increased. |
