Reasons why technical water from hydroelectric power plants is discharged into waste water

The water leaking from the upper crown of the Francis turbine through the gap of the anti-leakage ring is generally discharged into the waste water through the drainage hole to reduce the thrust of the water. opening the top cover for water cooling. Using this type of top cover to collect water can turn losses into efficiency. The cooling water in the unit must have a certain pressure and flow rate. To meet this requirement, the water intake of the top cover and the water height of the power plant, the speed of the unit, the diameter of the channel, the size of. the spacing of the anti-leak ring, the presence or absence of leak holes as well as the size and angle of arrangement of the holes. This is related to the structural form of the main shaft seal, the arrangement has a pump on the channel;