METHOD OF REFURBISHING AN ENERGY CONVERSION FACILITY AND REFURBISHED ENERGY COVERSION FACILITY

摘要

This method can be used for refurbishing a facility for converting hydraulic energy into electrical or mechanical energy, and vice versa. The facility includes a Francis type pump-turbine. The pump-turbine includes a runner movable about an axis, a pre-distributor, including stay vanes defining between each pair of two adjacent stay vanes a first water passage channel and a distributor, including guide vanes arranged downstream of the stay vanes in the direction of water flow feeding the pump-turbine operating in turbine mode. The guide vanes define between each pair of two adjacent guide vanes a second water passage channel. This method includes steps of reducing the height, taken parallel to the axis of rotation of the runner, of the first water passage channels and reducing the height, taken parallel to the axis of rotation of the runner, of the second water passage channels.

主权项

1. A method of refurbishing a facility for converting hydraulic energy into electrical or mechanical energy and vice versa, this refurbished facility having:
a Francis type pump-turbine, including a runner movable about an axis, a pre-distributor, including stay vanes defining between each pair of two adjacent stay vanes a first water passage channel, a distributor, including guide vanes arranged downstream of the stay vanes in the direction of water flow feeding the pump-turbine operating in turbine mode, the guide vanes defining between each pair of two adjacent guide vanes a second water passage channel,the method comprising:
a) reducing the height, taken parallel to the axis of rotation of the runner, of the first water passage channels; and b) reducing the height, taken parallel to the axis of rotation of the runner, of the second water passage channels.