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When the Łagisza power plant (Figure 1), located in the Katowice area of southern Poland, began commercial operation in June 2009, it marked a new era in the evolution of circulating fluidized-bed (CFB) technology. The plant is now celebrating its sixth year of successful commercial operation. Besides being the most advanced operating CFB steam generator in the world, the CFB at the Łagisza plant has unique first-of-a-kind design features, such as vertical-tube supercritical steam technology and lowtemperature flue-gas heat recovery system that allows the plant to achieve a very high net plant efficiency of 43.3% (based on the fuel’s lower heating value). A notable feature of the Łagisza CFB is that it meets all atmospheric emission permit levels without postcombustion de-NOx or de-SOx equipment such as selective catalytic reduction (SCR) or fluegas desulphurization (FGD). Like the Łagisza plant owners (PKE), Korean Southern Power Company (KOSPO) also saw value in CFB technology when it chose the technology for its 2200 MWe Green Power Plant project in Samcheok, Korea (Figure 2). The Samcheok plant, which is now under construction, will utilize four larger 550 MWe CFB boilers featuring ultrasupercritical steam conditions (257 barg, 603/603°C). These CFB boilers will be the most advanced units in the world when the plant comes on line as expected in 2016. Both PKE and KOSPO first considered conventional pulverized coal (PC) technology for their projects, but after studying the additional technical and economic benefits that a CFB brings, they ultimately chose CFB technology. The CFB boilers offer many benefits, but two in particular played a big role in their decision. They were: ➤ The CFB’s ability to reliably burn both low-rank and high-quality coals besides biomass and waste coal slurries (Łagisza only) dramatically improved the potential for huge fuel cost savings and high fuel procurement security ➤ The CFB’s ability to meet atmospheric emission goals without FGD or SCR technology saved on capital, operating costs and water. The value proposition of circulating fluidized-bed technology for the utility power sector