Dissolved gas augmentation with mixing chambers

A turbine installation capable of regulating dissolved oxygen level in water passing through a casing provided with an upstream inlet port and a downstream outlet port, the installation comprising:

• a rotatably mounted runner having a crown, a band substantially concentric with the crown, and a plurality of blades extending between the crown and the band at spaced intervals along the crown, each blade fixedly secured to the crown at an inner edge and to the band at a distal outer edge, each blade having a water directing surface defined by a pressure side, an oppositely facing suction side, a leading edge and a spaced apart trailing edge;
• a stationary discharge ring substantially concentric with the band and spaced outwardly therefrom;
• a band seal disposed between the discharge ring and the band to limit water leakage into a band mixing chamber formed therebetween;
• a gas supply in fluid communication with the band mixing chamber for supplying an oxygen containing gas thereto;
• and
• a control system including a plurality of sensor for indicating a level of dissolved oxygen in the water, the control system controlling a flow of oxygen containing gas entering the band mixing chamber and regulating the level of dissolved oxygen in the water being discharged from the downstream port.

A turbine installation capable of regulating dissolved oxygen level in water passing through a casing provided with an upstream inlet port and a downstream outlet port, the installation comprising:

• a rotatably mounted runner having a crown, a band substantially concentric with the crown, and a plurality of blades extending between the crown and the band at spaced intervals along the crown, each blade fixedly secured to the crown at an inner edge and to the band at a distal outer edge, each blade having a water directing surface defined by a pressure side, an oppositely facing suction side, a leading edge and a spaced apart trailing edge;
• a stationary head cover disposed concentrically with the crown and spaced therefrom to permit relative rotation of the crown and head cover;
• a crown seal disposed between the head cover and the crown to limit water leakage into a crown mixing chamber formed therebetween;
• a gas supply in fluid communication with the crown mixing chamber for supplying an oxygen containing gas thereto;
• and
• a control system including a plurality of sensors for indicating a level of dissolved oxygen in the water, the control system controlling a flow of oxygen containing gas entering the crown mixing chamber and regulating the level of dissolved oxygen in the water being discharged from the downstream port.