Shrouded fluid flow turbine

摘要

A device is disclosed for extracting energy from a fluid flow passing in a first direction, comprising at least one turbine (20) embedded in the fluid flow, the fluid flow maintaining a pressure difference between the input end of the turbine and the output end of the turbine; the turbine being at least partially shielded by a flow shroud means (216); said flow shroud means effecting an increase of said pressure difference by causing a partial area of the cross section of the total fluid flow to bypass the turbine; the bypassing flow being deflected by said flow shroud means into a second direction different from the first direction; and said flow shroud means consisting of at least one flow shroud means element shaped like a sail or similar means.