The latest advancements of F, G, H, and J-Class combustion turbines incorporate a variety of features to accommodate the requirements of today’s market. These market expectations include fast startup, deploying both base load and cycling operation, high ramp rates, high efficiency, high reliability, lower emissions, lower life-cycle costs, and other considerations. The combined-cycle plants are also trending larger in an effort to obtain economies of scale with the installed cost of the facility.
These factors impose numerous demands on the design of the combined-cycle power block and integration of the balance-of-plant (BOP) equipment when compared to the previous generation machines. This paper discusses the resulting design challenges and the successful implementation of techniques that have proven highly beneficial in the use of advanced combustion turbines in combined-cycle applications.
Some of the areas covered include integration of the latest combustion turbine cooling, sizing of heat recovery steam generators (HRSGs) and steam turbines, complex designs related to the larger equipment, and material selection for higher-steam temperatures.
Steven G. Warren and Edwin A. Giermak – Sargent & Lundy