Water is the most natural means of cooling. The motors and generators are identical. Through forced circulation of water, imagine cold water entering and passing through the pipe wall, carrying away the heat generated by the pipe wall. will continue to bring. Wouldn't it get colder if we removed the heat? For example, if you want to quickly cool a cup of hot water, you should put it in water to cool it faster. But if you let the cold water run continuously, will that remove the absorbed heat and cool it faster? Of course, it will produce electricity. The machine has very high requirements for cooling water, which generally must be transformed into salt-free water. For example, the amount of copper ions must reach a certain value before it can be used as cooling water. cooling fluid
1. Closed circuit air cooling
For turbogenerators less than 50,000 kilowatts, a closed circuit air cooling system is often used, along with the engine fan. is used to blow heating components to cool them.
2. Hydrogen Cooling
For generators with a capacity of 50,000 to 600,000 kilowatts, hydrogen cooling is widely used. The heat dissipation performance of hydrogen (purity 99%) is better than that of air, and the heat dissipation effect is good. It can significantly reduce the ventilation friction loss of the engine, thereby greatly improving the efficiency of the generator. Explosion-proof and leak-proof measures must be taken when using hydrogen cooling, which makes the engine structure more complex and increases the consumption and cost of electrode materials.
3. Cooling by liquid fluid
The cThe relative cooling capacity of water is 50 times that of air. To remove the same heat, the flow rate of water required is much lower than that of air. air. Therefore, using hollow wires in the coil and passing water through the wires for cooling can significantly reduce the temperature rise of the motor, delay insulation aging, and extend the service life of the motor.
Detailed information
Strictly treated hydrogen for cooling can ensure that the inside of the generator is clean, the ventilation and cooling effect heat dissipation is stable, and there will be no problems caused by dirt.
Hydrogen contains very little oxygen, less than 2%, and does not support combustion. Even if a short circuit fault occurs inside the generator, there is no risk of fire, which can greatly reduce the degreecombustion. Damage caused by fault. In hydrogen there is less noise and the insulating materials are less susceptible to oxidation and corona damage.
The hydrogen in the generator must maintain the specified purity to ensure the operating performance of the generator and avoid explosions. For this purpose, a hydrogen supply device must be installed.
Reference documents:
Baidu Encyclopedia - Generator