Alstom Renewable Technologies

Ge Renewable Technologies

Jacques Bremond

Serge Prigent

Farid Mazzouji

Claude Beral

Michel Couston

Jean-Francois Bertea

Danièle Bazin

Jean Francois Bertea

Daniele Bazin

Joel Louis Pierre Marin

Jean Francois Berta

Joel Louis Marin

Tomas Bustarret

Philippe Feriol

The present invention generally relates to a runner unit of a tidal power plant, and more particular to a device for reversing a blade of the runner unit. The device according to the invention is lighter and more efficient with respect to known solutions which involve articulated mechanisms as it is based on an auxiliary servomotor including a reciprocating linear rack which acts on the blade to be reversed.

Device for reversing a blade of a runner unit

This wheel comprises a plurality of vanes () arranged on a crown () and is equipped with a tip-forming member () attached to a central region () of the crown or hub of the wheel (), radially inside the vanes (), the crown defining a wet surface () for guiding a flow (E) passing between the vanes. The tip-forming member () is provided with at least one opening () for diverting a fraction (E) of the flow towards the internal volume (V) of this member. This member comprises a frustoconical annular skirt () and at least one fin () arranged in its internal volume (V) and able to modify the path of the flow fraction (E) entering this volume through the opening (). This fin () extends as far as the edge () of the skirt () which defines an outlet opening () of the member () for the flow fraction (E).

Francis-type hydraulic turbine wheel equipped with a tip-forming member, and method of reducing fluctuations using such a wheel

The invention relates to a unit comprising a hydraulic turbine (), a duct () leading a forced flow of water to the turbine, a duct () discharging the outgoing flow from the turbine and vanes () for guiding the flow through the discharge duct. Each guide vane () is able to rotate about an axis (x) secant to the wall () of the discharge duct. Means () are provided for controlling the angular position of the vane () about its axis of rotation (x). Each guide vane () can also be retracted into the wall () of the discharge duct (), and means () are provided for adjusting the extent to which they are withdrawn into the wall.

Installation for converting hydraulic energy, and a method of controlling such an installation

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Saint-Egreve, France

Jacques Bremond