ABSTRACT
Repowering is an old concept, which involves rejuvenation and cleaning of aging coal-fired power plants via replacement of their coal-fired boilers with natural gas-fired gas turbines and heat recovery steam generators. It can be a feasible and effective tool in reducing carbon dioxide emissions especially in those parts of the world with looming retirement of coal-fired power plants and readily available, cheap natural gas (e.g., the USA). This chapter covers the basic repowering options involving gas turbines, their cost ramifications and an example calculation to illustrate cost-performance trade-off inherent in a repowering project.
