(1) Air cooling was only used on a small number of early generators and has now been eliminated.
(2) External hydrogen cooling, that is, the stator, rotor windings and stator hinge core are all cooled by the hydrogen surface.
(3) Internal hydrogen cooling, that is, the stator winding and the stator core are surface cooled by hydrogen, and the rotor winding is cooled internally by hydrogen. The generator models are: TQN and QFN.
(4) Water-hydrogen cooling means internal water cooling of the stator winding and internal hydrogen cooling of the rotor winding. The stator core is externally cooled hydrogen. The generator model is: QFO3, Q N.
Hydrogen only circulates in the generator chamber. There are generally four cold air chambers and five cold air chambers.hot air fans (four inlets and five outlets, cold air in and hot air out, taking 200 MW as an example). to produce electricity. There is usually a powder-coated fan on the end of the generator rotor, which rotates with the rotor during operation. These two fans blow cold air (hydrogen) cooled by the hydrogen cooler to the four corners of the generator in the space. between the generator stator and the rotor cavity, then exits, passes through the hot and cold air chambers in sequence, and after reaching the middle hot air chamber, exits from outside the stator chamber, then is cooled by all four. -cooler corner to start a new cycle.
Hydrogen is produced by electrolysis of water in an electrolyser in a hydrogen station. If the generator leaks hydrogen or other factors cause low hydrogen pressure, the main hydrogen pipe of the station of hydrogen can be replenished. If the purity of the hydrogen does not meet standards, the hydrogen is vented from the generator to the atmosphere.
Hydrogen-cooled generators use hydrogen gas to cool the generator rotor.