Abstract
This paper presents a proposal for using the latent heat of the steam condensed in an economizer used to preheat the feeding water to the steam generator, with the aim of increasing the efficiency of thermal power plants. A novel methodology applied to power plants producing over 350 MW power plants and that use natural gas is developed. Also, a detailed study of the different alternatives proposed is presented and their direct effects on the economic feasibility have been evaluated. Increases up to 0.6 % in the global efficiency are obtained, besides short return investment periods, depending on the annual effective working hours of the power plant.
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