The steam-tube and air heater combined cycles utilizing pressurized fluidized bed combustion have been proposed for coal-fired power generation because of their potentially high efficiency and low levels of pollutant emissions. Thermodynamic models have been developed and used to predict the performance of both cycles. The intercooled steam–tube cycle was found to be the most efficient cycle with an efficiency approximately 1.5 percentage points higher than a conventional plant with flue gas desulphurization.
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