Lesson 5 Synchronous Generator Cooling Hydrogen Purging And Charging Synchronous generator,generator cooling hydrogen,using hydrogen to cool synchronous generator. Csa. feb 25, 2010. #2. the concepts of a hydrogen cooled generator are very simple. as current flows in a conductor, heat is generated. a generator has a lot of conductors and a lot of current flowing through the conductors, generating a lot of heat. if that heat isn't "removed" then the windings will be damaged (insulation "blisters.
Hydrogen Cooling Of A Synchronous Generator In the hydrogen cooling of a synchronous generator, hydrogen gas is used for cooling because hydrogen gas has excellent cooling properties. the power loss (i 2 r loss) in the form of heat loss occurs in a generator when the generator delivers power to electrical equipment. the life of the generator depends on how efficient the cooling system it. Limitations of hydrogen cooling. the frame of the hydrogen cooled alternator is more costly because of the necessity to provide explosion proof construction and gas tight shaft seals. means are necessary to admit hydrogen to the alternator without creating an explosion. sourcing the air with co 2 and then admitting hydrogen. The hydrogen cooling system is uneconomical for such applications. direct water cooling is used for the synchronous generator rating 500 mw and above. in very large turbo generators, hydrogen cooling is used for the cooling of the rotor and the stator winding is cooled with direct demineralized water. the centrifugal pump circulates the water. Advantages of hydrogen cooling: the density of the hydrogen is 1 14 th that of the air, the power required to circulate hydrogen (pumping capacity) is about 1 14 th of the power required for an equivalent quantity of air. hence the losses are reduced and the efficiency of the machine is improved by about 1% of the full load power of the machine.
Generator Hydrogen Cooling System Youtube The hydrogen cooling system is uneconomical for such applications. direct water cooling is used for the synchronous generator rating 500 mw and above. in very large turbo generators, hydrogen cooling is used for the cooling of the rotor and the stator winding is cooled with direct demineralized water. the centrifugal pump circulates the water. Advantages of hydrogen cooling: the density of the hydrogen is 1 14 th that of the air, the power required to circulate hydrogen (pumping capacity) is about 1 14 th of the power required for an equivalent quantity of air. hence the losses are reduced and the efficiency of the machine is improved by about 1% of the full load power of the machine. During start up and shutdown purging operations. during normal operation, the hydrogen purity is monitored in an 80 to 100% h 2 ss, $ u range to detect air leaks or hydrogen supply problems. during the start up of a hydrogen cooled generator, air in the generator is first displaced with carbon dioxide. after the first purge operation is. During maintenance shutdowns, the hydrogen cooling loop in the generator is purged with carbon dioxide. after co 2 concentrations are measured with a densitometer to verify the complete removal of hydrogen, the generator is purged with air, and the maintenance is performed. this purging procedure was used in this incident.
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