Diesel generator cooling methods are generally divided into three types: air, hydrogen, and water. The cooling system of a general synchronous generator is closed, and the cooling medium is recycled.
1) Air cooling - Air cooling is done by fans. Cold air is blown against the ends of the windings of the diesel generator set, the stator and rotor of the generator set to dissipate heat. The cold air absorbs heat. Then it turns into hot air. After the air between the stator and the rotor first merges, it is discharged through the air duct of the iron core and cooled through the cooler. The cooled air is then sent into the generator by the fan for circulation to achieve the purpose of heat dissipation. The machines generally use air cooling for medium and small synchronous generator sets. ,
2) Hydrogen cooling - Hydrogen cooling uses hydrogen as the cooling medium. The heat dissipation performance of hydrogen is better than that of air. Most large turbine generators use hydrogen cooling.
3) Water cooling - water cooling uses double water internal cooling of the stator and rotor.