Power plant systems for enhancement of efficiency and reduction of heat rate

摘要

A power generation system is provided for improving efficiency and reducing heat consumption. A power generation system for improving efficiency and reducing heat consumption according to an exemplary embodiment of the present invention includes a high-pressure turbine, a medium-pressure turbine, and two low-pressure turbines, and includes a turbine unit connected to a generator; A plurality of pump units for condensing the steam discharged from the low-pressure turbine in a condenser and supplying the condensed condensate; A plurality of feed water heaters for heating the feed water supplied from the plurality of pump units through steam extracted from the turbine unit; A boiler for heating the feed water supplied from the feed water heater to generate high-temperature superheated steam and then supplying the superheated steam to the high-pressure turbine; A reheater for reheating steam discharged from the high-pressure turbine and supplying it to the medium-pressure turbine; And a heat consumption rate reducing unit for increasing the pressure and temperature of the main steam supplied from the boiler to the high-pressure turbine, wherein the heat consumption rate reducing unit is a feed water heater closest to the boiler among the plurality of feed water heaters, and It is an additional feed water heater disposed between the boilers, and the additional feed water heater heats the feed water supplied from the nearest feed water heater using the high-temperature and high pressure steam extracted from the inlet side of the high-pressure turbine, and then goes to the boiler side. Supply.