A
This Abdulaziz, mechanical engineer. We are currently facing an issue in one of our GE combustion gas turbine that is driving a generator.
The turbine was commissioned on 2016. Due to low demand in power at that time, it was decided to put it out of service. initially turbine preservation was maintained. (by running auxiliary system). however, the preservation activity were stopped for quite good time due to missing parts. lately, the team managed to restore the preservation by installing all needed materials.
For now the team decided to run the turbine due to demand on power, our dilemma is as follow:
- Three weeks ago, the team has installed all other missing materials.
- All turbine start-up permissive were cleared
- Start-up attempt was done successfully.
- Generator was synched to the grid successfully.
- All operations parameters are healthy except the TTRF which reached to 1781 DegF. IBH was fully opened (info)
-Exhaust temperatures are way less than other turbine temperatures we have in the plant. the Turbine was started on may 13th and the exhaust temp were in the range of 1050 degf with an IBH 100% opening. On may 29th, the IBH went to close position although the command was 100% which accordingly affected the TTRF to be 1200 DegF as well as the exhaust temperatures to be 700 DegF.
Can we get advise of how to restore the efficiency of the machine and have it operate in premix?
The turbine was commissioned on 2016. Due to low demand in power at that time, it was decided to put it out of service. initially turbine preservation was maintained. (by running auxiliary system). however, the preservation activity were stopped for quite good time due to missing parts. lately, the team managed to restore the preservation by installing all needed materials.
For now the team decided to run the turbine due to demand on power, our dilemma is as follow:
- Three weeks ago, the team has installed all other missing materials.
- All turbine start-up permissive were cleared
- Start-up attempt was done successfully.
- Generator was synched to the grid successfully.
- All operations parameters are healthy except the TTRF which reached to 1781 DegF. IBH was fully opened (info)
-Exhaust temperatures are way less than other turbine temperatures we have in the plant. the Turbine was started on may 13th and the exhaust temp were in the range of 1050 degf with an IBH 100% opening. On may 29th, the IBH went to close position although the command was 100% which accordingly affected the TTRF to be 1200 DegF as well as the exhaust temperatures to be 700 DegF.
Can we get advise of how to restore the efficiency of the machine and have it operate in premix?