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 inner barrel reduces from 195 Deg C to 155 Deg C.
We adjusted the TK88 (Exhaust Frame Cooling Fan) discharge pressure to 30 inch H2O from 37 Inch H2O, and inner barrel temperatures reduced to 155 Deg C during ramp up from 60MW to 125MW.
Following are my question on above scenario:
1. What is reason for high temperatures of Inner barrel during load ramp up?
2. What is the affect of Load compartment fans on Inner barrel?
3. What is the impact of TK88 discharge pressure on inner barrel?
We adjusted the TK88 (Exhaust Frame Cooling Fan) discharge pressure to 30 inch H2O from 37 Inch H2O, and inner barrel temperatures reduced to 155 Deg C during ramp up from 60MW to 125MW.
Following are my question on above scenario:
1. What is reason for high temperatures of Inner barrel during load ramp up?
2. What is the affect of Load compartment fans on Inner barrel?
3. What is the impact of TK88 discharge pressure on inner barrel?