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

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...

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

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...

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...

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...

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...

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...

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

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

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...

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...

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...

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

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

Hi in our power plant we have a 5.000.000 litres capacity cilindrical tank for storage fuel oil N°2. We have four Gas Turbines that burn Natural Gas or Distillate Oil. Only when we have an emergency situation with Natural Gas we run the units using Fuel Oil N°2. My question its about ¿How is...

Hi norzul Here in Venezuela for Power plant the NG price is 0,78 US$/MMBTU (HHV). This is a reason that you don´t see any Combined Cycle Plant using Gas turbines in Venezuela. The criteria for do off line washing is based on our own experience. Of course this criteria is according for GT...

Hi norzul, normally when you shutdown the gas turbine before do the off line washing you need to wait cooldown the machine: typical around 24 to 48 hours. For the off line compressor washing first we need to do the following procedure for W501D5 units: 1. Start the machine at 800 rpm using the...

Hi in our power plant we have five gas turbines Siemens Westinghouse model W501D5 100 MW ISO conditions. Actually we running at base load condition in simple cycle. According with our experience the most effective compressor cleaning is off line washing. The optimun frecuency for off line...

For W501D5 100 MW Gas Turbines we have three types of maintenance according with Siemens Westinghouse standards considering base load running condition: Combustor Inspection: Each 8000 EOH (Equivalent Operating Hours)The outage is complete between 3 or 4 days working with one shift of 12 hours...