Patent ID: 9091183
Filing Date: 2015-07-28
Classification: F01K,F05D,F22D,G06F,Y02E

Abstract:
1. A method of operating a power generation system, comprising: heating a working fluid in a steam generator; directing the heated working fluid into a turbine to rotate the turbine, the working fluid forming a feed after exiting the turbine; extracting a bleed from the turbine and using the bleed to heat the feed in a feedwater heater configured to exchange heat between a first flow path through which the feed flows and a second flow path through which the bleed flows; and adjusting at least one of a mass flow rate of the bleed and an extraction pressure of the bleed such that a double pinch is obtained in the feedwater heater, the double pinch comprising a first pinch point at an onset of condensation of the bleed and a second pinch point at a bleed outlet of the feedwater heater.