We have a vertical type muti-stage centrifugal pump which operates at 1500 RPM and has smooth operation with vibration limit max of 0.8mm/sec RMS. During shutdown or start-up when the said pump reaches 80 to 90 RPM, its vibration increases significantly i.e. above 80 mm/sec RMS and causes...
We have Alstom Steam turbine with H2 cooled generator with capacity of 400MW with 02 9HA.01 Gas Turbines in CCPP operation.
Problem Statement:
During ST seal oil AC pump change over, DP for ST seal oil system becomes 0 and then returns back after few sec while seal oil pump is running.
For...
We have Alstom Steam Turbine capacity 400MW equipped with 02EA GE 9HA turbines in CCPP of capacity 1223MW commissioned in 2018. Steam turbine generator is H2 cooled.
There are leakages from STG bearing oil seals and we are searching for a root cause. Following are my questions
1. What is...
I mean the maximum axial force that thrust bearing can withstand. I think the normal axial force is around 300 kilo newton (KN). (I do not have any reference).
I need the maximum acceptable axial force that is mentioned in thrust bearing drawing or spec document.
We are having trouble during the start-up of our gas turbine (MS9001E) on liquid fuel. Whenever turbine reaches upto around 2900 ~ 2950 RPM, the VC3 valve starts hunting and within 5 seconds the machine gets trip over LOSS OF FLAME signal.
We have replaced VC3 servo valve, its hydraulic...
HRSG LP steam is utilized in De-aerator for de-aeration of condensate from steam turbine. During base load operation of plant, LP steam is combined with HP extraction steam to meet the requirement for de-aeration of water. During partial load operation, HP steam generation is reduced which...
During ramping up of GT (GE Fr9E) from 60MW to base load (125MW), turbine inner barrel temperatures start rising from 120 Deg C to 195 DegC, and Load compartment temperatures rise from 95 Deg C to 145 Deg C. As Load compartment reaches 145 Deg C, Load compartment fan#2 cut in and temperature of...
HRSG gas burners are experiencing high spread reaching to 120 Deg C spread on partial load (4 out of 8 burners in operation) as compared to 60 Deg C spread on base load (8 out of 8 burners in operation). Partial load operation also have changed the stack smoke from clear to yellowish.
What is...