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Ge Renewable Technologies

Philippe Girin

Renaud Guillaume

Armin Steinhilber

Pierre Yves Lowys

Arnaud Legrand

This invention discloses in particular an actuation cylinder () for controlling the movement of a ring-gate () of a hydraulic machine, said actuation cylinder () comprising a body () forming a first chamber () provided with a first duct () and a second chamber () provided with a second duct () which are designed to receive an actuating fluid through said first duct () and said second duct (), said chambers being separated from one another by a piston () connected to an actuating rod () and able to move in said body in a first direction in which the volume of the second chamber increases while the volume of the first chamber decreases, and in a second direction in which the volume of the second chamber decreases while the volume of the first chamber increases, said piston being provided with a rod () connected in said second chamber to an area () of the piston turned toward said second chamber, said area () having a surface less than an area () of the piston turned toward the first chamber.

Device and method for ring gate closing optimization

The present invention generally relates to hydraulic machinery, such as hydraulic turbines. More specifically, the invention is directed to optimizing power consumption when the turbine is used in condenser mode. The present invention provides a novel hydraulic installation where the reduction of pressure in the spiral case during condenser mode operations is more efficient, limiting the power consumption if compared to state-of-the-art installations.

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Grenoble, France

Philippe Girin