Abstract
The results of an analysis of the performance and cost impacts for reduction of the major greenhouse gas emission, CO2 from the Humid Air Turbine (HAT) cycle as compared to an advanced steam cooled combined cycle are presented. The flow rate of the cooled exhaust gas from the HAT cycle to be treated in the CO2 recovery unit is significantly lower while the CO2 concentration of this feed gas is higher than that in a combined cycle which reduces both the operating and the capital costs of the CO2 recovery unit. The water recovered from the exhaust of the HAT cycle is recycled, thus greatly reducing the water consumption of the power plant. The cycle with its inherently high thermal efficiency and low NOx emissions also “attacks the problem at the source” with regard to the total greenhouse gas emissions. A capital cost saving of approximately $50/KW is achieved with the FT4000 HAT as compared to the combined cycle when CO2 recovery is incorporated, despite the larger advanced combined cycle plant benefiting from economies of scale.
Published Version
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