Combined cycle power plant with auxiliary air-cooled condenser

摘要

A combined cycle power plant ( 20 ) including a main air-cooled condenser ( 22 ) condensing steam at a first pressure and an auxiliary air-cooled condenser ( 24 ) condensing steam at a second pressure higher than the first pressure. Designing an air-cooled combined cycle power plant for startup on a hot day can significantly increase the size and cost of the required air-cooled condenser. Adding an auxiliary air-cooled condenser having appropriate thermal characteristics relative to a main air cooled compressor to the steam bypass circuit of an air-cooled combined cycle power plant enables the plant to meet plant startup requirements during periods of peak thermal load in a more cost effective manner than would be achievable with the main air cooled condenser alone.