초록 ▼

A combined cycle power generating system includes high, intermediate and low pressure vapor turbines for driving a generator or other load by expanding a multi-component fluid mixture through the turbines. A gas turbine is drivingly connected to the generator or other load. The expanded multi-compon

A combined cycle power generating system includes high, intermediate and low pressure vapor turbines for driving a generator or other load by expanding a multi-component fluid mixture through the turbines. A gas turbine is drivingly connected to the generator or other load. The expanded multi-component mixture exhausted from the intermediate pressure turbine flows in heat exchange relation with the fuel inlet to the combustor for the gas turbine whereby the gas turbine fuel is preheated to reduce fuel consumption of the gas turbine and increase combined cycle efficiency.

대표청구항 ▼

[ What is claimed is:] [1.] In a combined cycle power generating system having a plurality of turbines, including first and second vapor turbines, and a gas turbine for driving one or more generators for generating electricity or mechanical work, a method of increasing the efficiency of the system,

[ What is claimed is:] [1.] In a combined cycle power generating system having a plurality of turbines, including first and second vapor turbines, and a gas turbine for driving one or more generators for generating electricity or mechanical work, a method of increasing the efficiency of the system, comprising the steps of:(a) expanding a working fluid through the first vapor turbine;(b) reheating expanded working fluid from the first vapor turbine;(c) expanding the reheated working fluid through the second vapor turbine;(d) cooling the working fluid exhausted from the second vapor turbine; and(e) heating fuel for combustion in the gas turbine by passing the fuel in heat exchange relation with the working fluid expanded through said second turbine.