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Recent content by ahung

  1. ahung

    Up date 7EA Combustion system. Dual fuel Dry Low NOx nozzles

    Thanks for your valuables recommendations. I really appreciate all comments. Regards Alberto J. Hung C Caracas Venezuela
  2. ahung

    Up date 7EA Combustion system. Dual fuel Dry Low NOx nozzles

    Our company bought two 7001EA Combustion Turbines. These units have conventional natural gas only fuel nozzles and we need to up date the combustion system to Dual fuel (natural gas and fuel oil #2) Dry Low NOx (DLN) fuel nozzles. According to the company in charge to do the job is necessary...
  3. ahung

    Gas Turbine Power Augmentation using Fogging System

    Thanks for all of yours valuables comments and advices. I really appreciate all of them. Regards Alberto J. Hung C Caracas Venezuela
  4. ahung

    VFD vs Soft Starter

    If you don´t need control the motor speed you shouldn´t use the VFD. In your specific case you need to move a big motor (200 HP) depending of voltage level may be the starting current is very high and is better use a soft starter, but with the soft starter you can´t get a 100 % full load torque...
  5. ahung

    Gas Turbine Power Augmentation using Fogging System

    Does anyone know or have any experience using Fogging system for power augmentation in gas turbine (501D5) operating in symple cycle? I have some questions: How many additional MW can you obtain using this Fogging system. One of site condition is the average humidity around 70% How much...
  6. ahung

    Working away from home ?

    The time with your family is priceless. Its very important for a father see how grow up his kids. Work to live not live to work. Your wife and you need spend much time with the kids, support them, help them etc. In the future they will remember goods things, goods memories about his parents...
  7. ahung

    Maintenance strategy based on Reliabilty Centered Maintenance (RCM)

    Thanks all for this valuables comments about my question. In order to clarify with more details the majority of bearings are sealed type and the electric motors are locate in difficult access places. Another factor to be consider is our plant running 24 hours 365 days of the year at base load...
  8. ahung

    Maintenance strategy based on Reliabilty Centered Maintenance (RCM)

    In our power plant we have five (5) combustion turbines burn natural gas on simple cycle. Normally when we do the major outages (Hot gas Path Inspection or Major inspection) in average each three year (24.000 hours)we change all electric motors bearings (for example for lube oil pumps, fans...
  9. ahung

    Motoring Generator by Breaker Failure

    Thanks a lot for all advices and suggestions Regards Alberto J. Hung C Caracas Venezuela
  10. ahung

    Why did my power tool burn out?

    Probably the insulation burn due to an excesive current. I agree with rbulsara about home tool are not designed for continuous use. If you need to do a heavy work you must use an industrial drill for example. Regards Alberto J. Hung C Caracas Venezuela
  11. ahung

    Motoring Generator by Breaker Failure

    Hi bradh01 you are correct about breaker failure protection We have 50BF (Breaker Failure) relay but when the motoring generator occur the current setpoint is too high for detect it and not operate "cleaning" the bus bar on 69 kV. The Central Dispatch open all circuit of bus bar and clear the...
  12. ahung

    Motoring Generator by Breaker Failure

    Thanks for all responses. For clear some doubts about the motoring generator I explain the event with more details: Definitely the generator (syncronous machine) ran as syncronous motor because the rotor still has excitation current. The speed maintain around 3600 rpm. The CT normally when...
  13. ahung

    Motoring Generator by Breaker Failure

    Does anyone know about the consequences of Motoring of Electric Generator by Breaker failure (Trip Coil was failed and the Generator breaker didn´t open to disconect to the grid). When the operator unload the machine to shutdown it the control system send the signal to open the generator...
  14. ahung

    SWGR induction heating elimination

    Electic You can try to use thermographic camera inspection to see with more details the hot zones on switchgear walls. According with the temperature you can determine the heat pattern very easy way on switchgeras walls. Regards Alberto J. Hung C Caracas Venezuela
  15. ahung

    Safety audit book

    Hi Davidorias try with this book (This Book is according with OSHA Standards) Process Safety Audit Protocols By Ian Sutton Within this 280 page book, each chapter has the OSHA regulation, OSHA guidelines and the EPA regulation. Regards Alberto J. Hung C Caracas Venezuela
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