Hydrogen is one of the gases with the lowest specific density, so ventilation loss is low. The fan on the generator rotor in the turbine generator set has high mechanical efficiency. The thermal conductivity of hydrogen is high, which can dissipate quickly. Generator heat and improve high cooling efficiency. Hydrogen does not support combustion. The oxygen content of the generator is less than 2%, so the risk of fire is very low if the generator winding fails.
The generator of the turbogenerator group must therefore be cooled by hydrogen.
Instantaneous flow requirements for generator hydrogen replenishment
Advantages:
(1) Low density of hydrogen significantly reduces friction losses in generator fans and ventilation systems. improve generator efficiency;
(2) Hydrogen has a high heat transfer coefficient and strong thermal conductivity, which can increase the unit capacity of the generator and reduce the size of the generator;
( 3) L Hydrogen has good insulation properties and low ionization phenomenon, which can extend the life of the coil
(4) Due to the low density of hydrogen and use of closed circulation; system, the noise of the unit can be significantly reduced.
Disadvantages:
(1) Hydrogen is a flammable and explosive gas. As long as the air contains 5-76% hydrogen (volume ratio), it will explode in a fire. . ;
(2) Hydrogen is a gas lighter than air and very permeable, so the rigor of the generator is necessary to prevent hydrogen from escaping;
(3) There must be a hydrogen production device to meet the need for continuous hydrogen replenishment;
(4) When charging and discharging hydrogen from the generator, it is very tedious, the process is slow, and the technical requirements are very strict.
The instantaneous hydrogen replenishment rate of the generator must be less than 80 cubic meters per hour. According to the request for relevant information, the instantaneous hydrogen replenishment rate of the generator should be less than 80 cubic meters per hour, and the hydrogen replenishment rate is less than 1 kPa per minute, which can prevent cold hydrogen from being released. be too fast and cause condensation of the hydrogen during the mixing process with the hot hydrogen from the generator. The generator's instantaneous hydrogen replenishment rate will change depending on the generator temperature.