Gas turbine engine with turbine cooling and combustor air preheating

• US 20160069264A1
• Filed: 07/20/2014
• Published: 03/10/2016
• Est. Priority Date: 07/22/2013
• Status: Abandoned Application

• Current Assignee: James P. Downs, Joseph D. Brostmeyer, Justin T. Cejka
• Original Assignee: James P. Downs, Joseph D. Brostmeyer, Justin T. Cejka
• Inventors: Brostmeyer, Joseph D., Downs, James P., Cejka, Justin T.
• Application Number:
  US14/335,916
• Publication Number:
  US 20160069264A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01D 15/10 Adaptations for driving, or combinations with, electric generators
• CPC Class Codes: F01K 23/10 with exhaust fluid of one cycle heating the fluid in another cycle F01K17/025 takes precedence
• CPC Class Codes: F02C 3/107 with two or more rotors connected by power transmission
• CPC Class Codes: F02C 3/34 with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle
• CPC Class Codes: F02C 7/143 before or between the compressor stages
• CPC Class Codes: F02C 7/36 Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user F02C3/107 - F02C3/13 and F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H
• CPC Class Codes: F05D 2220/32 in gas turbines
• CPC Class Codes: F05D 2220/76 an electrical generator
• CPC Class Codes: H02K 7/1823 structurally associated with turbines or similar engines
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A gas turbine engine, especially an industrial gas turbine engine for electrical power production, where a second compressor is used to supply a second compressed air at a higher pressure to a stage of stator vanes in the turbine section of the engine for cooling of the stage of stator vanes, and where the heated compressed air used to cool the stator vanes is then discharged into the combustor to be burned with a fuel and produce a hot gas stream that is passed through the turbine. an intercooler can be used with the second compressor to lower the temperature of the second compressed air used for cooling the stator vanes.

Claims

1. An industrial gas turbine engine comprising:

a first compressor to produce a first compressed air with a first pressure;

a combustor to receive the first compressed air from the first compressor to burn with a fuel to produce a hot gas stream;

a turbine rotatably connected to the first compressor to receive the hot gas stream from the combustor;

the turbine having a stator vane with a cooling circuit;

a second compressor to produce a second compressed air with a second pressure;

a first passage to pass the second compressed air from the second compressor to the cooling circuit of the stator vane;

a second passage to pass the second compressed air from the turbine stator vane to the combustor; and

,

the second pressure is greater than the first pressure.

2. The industrial gas turbine engine of claim 1, and further comprising:

the second compressor includes an intercooler to lower a temperature of the second compressed air.

3. The industrial gas turbine engine of claim 1, and further comprising:

an inlet to the second compressor is connected to a lower stage of the first compressor; and

,

an intercooler is located between the first compressor and the second compressor to lower a temperature of the second compressed air.

4. The industrial gas turbine engine of claim 1, and further comprising:

a heat recovery steam generator to receive exhaust from the turbine of the gas turbine engine and produce steam to drive a second turbine that drives an electric generator;

a condenser to convert exhaust steam from the second turbine into water; and

,

the second compressor having an intercooler that uses the water from the condenser to lower a temperature of the second compressed air.