My understanding of combined cycle gas turbine plants involves a steam cycle on the exhaust side of the gas turbine. This implies throttling down the unit for off-peak power. This form of operation is probably less efficient than the full throttle operation during peak loads. I admit I did not thoroughly read all the data but there are two efficiencies: one for base load with throttled ccgt’s and one for peak load with full throttle ccgt’s.
My understanding of combined cycle gas turbine plants involves a steam cycle on the exhaust side of the gas turbine. This implies throttling down the unit for off-peak power. This form of operation is probably less efficient than the full throttle operation during peak loads. I admit I did not thoroughly read all the data but there are two efficiencies: one for base load with throttled ccgt’s and one for peak load with full throttle ccgt’s.