Patent ID: 9297278
Filing Date: 2016-03-29
CPC Classification: F01K

Claim Text:
1. A structure comprising: a variable feedwater heating system including: a steam extraction line having a first end and a second end, the first end of the steam extraction line being fluidly connected to the single line and configured to extract steam therefrom; a feedwater heater to heat feedwater to a final feed water temperature fluidly connected to the second end of the steam extraction line, wherein the feedwater heater is downstream of the connection between the single line and the steam extraction line, the feedwater heater including a feedwater heating line therein, wherein the feedwater heating line is in thermal communication with the steam extracted from the steam extraction line; wherein the steam extraction line delivers an extraction fraction of steam from the turbine to the feedwater heater; and a steam generator in circuitous fluid connection with the feedwater heating line, wherein the final feedwater temperature is a temperature of the feedwater upon exiting the feedwater heater and upon entering the steam generator, and wherein the final feedwater temperature is varied based on the extraction fraction of steam.