S
Dear all,
Our Steam turbine is GE D-11 model.
We have two main stop and control valves (MSCV) (2*100%)
and two Reheat stop (RSV) and Intercept valves (IV)(2*50%)
I want to know what happened to turbine (whenever the turbine is in operation) output in the below conditions or will the below conditions trip the turbine. please clarify me.
MSV 1 closes, CV1 opens and MSV2 opens and CV2 opens
MSV 1 opens, CV1 opens and MSV2 opens and CV2 opens
RSV 1 opens, IV1 closes and RSV2 opens and IV2 opens
RSV1 closes, IV1 opens and RSV2 opens and IV2 opens
open refers to 100% and Closes refers to 0%
We have a facility of Valve Test for checking that the main stop valves are free to close if the unit is tripped and that each control valve is free to close if an overspeed situation occurs.Each main stop valve/control valve pair is tested separately,causing a small allowable pressure rise with corresponding small drop in load. Upon initiating the test procedure, the control system locks out the other valve pair from being tested until the test is complete.
So the above is only during test condition but during the real time operation if the above conditions acted what will be the effect on turbine....
Our Steam turbine is GE D-11 model.
We have two main stop and control valves (MSCV) (2*100%)
and two Reheat stop (RSV) and Intercept valves (IV)(2*50%)
I want to know what happened to turbine (whenever the turbine is in operation) output in the below conditions or will the below conditions trip the turbine. please clarify me.
MSV 1 closes, CV1 opens and MSV2 opens and CV2 opens
MSV 1 opens, CV1 opens and MSV2 opens and CV2 opens
RSV 1 opens, IV1 closes and RSV2 opens and IV2 opens
RSV1 closes, IV1 opens and RSV2 opens and IV2 opens
open refers to 100% and Closes refers to 0%
We have a facility of Valve Test for checking that the main stop valves are free to close if the unit is tripped and that each control valve is free to close if an overspeed situation occurs.Each main stop valve/control valve pair is tested separately,causing a small allowable pressure rise with corresponding small drop in load. Upon initiating the test procedure, the control system locks out the other valve pair from being tested until the test is complete.
So the above is only during test condition but during the real time operation if the above conditions acted what will be the effect on turbine....