We have two GE-9E machines. Recently we are changing fuel from HSD to Natural gas. Both the machines have the standard combustion with water injection facility for NOx control.
When we run the machines in temperature control mode OFF condition i.e. in Simple cycle mode the maximum load range we have got 115 MW~119MW depends on ambient temperature. (in our case site conditions are: Atm Temp=32 degC, RH=80%, Atm pressure=1013 mbarg.). But when we run the machines in temperature control mode ON i.e. combined cycle mode the maximum load range, we have got 106~111 MW without water injection and with water injection it changed to 113~115MW. As per our Combined cycle designed capacity both the GTs load have to be 115MW to 119MW with water injection. So now we are facing capacity shortage issue from off taker. We asked on site GE T/A but he did nothing. He sent data to GE Engineering team for review but still we could not find a way to compensate the capacity.
In both control mode at base load IGV opening is full and the exhaust temperature is different with a little difference in fuel flow rate. (in SC mode it is 520~528 degC and in CC mode it is 540~547degC). We all know the control of machines based on the programming in software. (it follows load order from the control block). So we also
requested GE for a review.
Anybody has any idea/suggestions please share.
Regards,
Rokan
When we run the machines in temperature control mode OFF condition i.e. in Simple cycle mode the maximum load range we have got 115 MW~119MW depends on ambient temperature. (in our case site conditions are: Atm Temp=32 degC, RH=80%, Atm pressure=1013 mbarg.). But when we run the machines in temperature control mode ON i.e. combined cycle mode the maximum load range, we have got 106~111 MW without water injection and with water injection it changed to 113~115MW. As per our Combined cycle designed capacity both the GTs load have to be 115MW to 119MW with water injection. So now we are facing capacity shortage issue from off taker. We asked on site GE T/A but he did nothing. He sent data to GE Engineering team for review but still we could not find a way to compensate the capacity.
In both control mode at base load IGV opening is full and the exhaust temperature is different with a little difference in fuel flow rate. (in SC mode it is 520~528 degC and in CC mode it is 540~547degC). We all know the control of machines based on the programming in software. (it follows load order from the control block). So we also
requested GE for a review.
Anybody has any idea/suggestions please share.
Regards,
Rokan