Gas turbine engine system equipped with Rankine cycle engine

• US 9,453,434 B2
• Filed: 04/02/2013
• Issued: 09/27/2016
• Est. Priority Date: 04/05/2012
• Status: Active Grant

• Current Assignee: Kawasaki Jukogyo Kabushiki Kaisha (Kawasaki Heavy Industries Limited)
• Original Assignee: Kawasaki Jukogyo Kabushiki Kaisha (Kawasaki Heavy Industries Limited)
• Inventors: Morishita, Hiroshi, Tanimura, Kazuhiko, Tanaka, Ryozo, Sugimoto, Takao, Kusterer, Karsten, Bohn, Dieter, Braun, Rene
• Primary Examiner(s): Denion, Thomas
• Assistant Examiner(s): FRANCE, MICKEY H
• Application Number:
  US14/390,282
• Publication Number:
  US 20150059341A1
• Time in Patent Office: 1,274 Days
• Field of Search: 606418-64115, 60/391.82
• US Class Current: 1/1
• 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: F01K 25/08 using special vapours
• CPC Class Codes: F02C 1/05 characterised by the type or source of heat, e.g. using nuclear or solar energy
• CPC Class Codes: F02C 6/18 using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants using waste heat as source of energy for refrigeration plants F25B27/02; using the waste heat of a gasturbine for steam generation or in a steam cycle see F01K23/10
• CPC Class Codes: F02C 7/08 Heating air supply before combustion, e.g. by exhaust gases
• CPC Class Codes: F02C 7/143 before or between the compressor stages
• CPC Class Codes: F03G 6/005 Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
• CPC Class Codes: F03G 6/064 having a gas turbine cycle, i.e. compressor and gas turbine combination
• CPC Class Codes: F03G 6/067 Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
• CPC Class Codes: Y02E 10/46 Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
• CPC Class Codes: Y02E 20/14 Combined heat and power generation [CHP]
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Abstract

A combined-type gas turbine engine system is provided which achieves high efficiency by very effectively using exhaust heat from a gas turbine engine. In a gas turbine engine system including: a compressor for compressing a first working medium; a heater for heating the compressed first working medium by an external heat source; a turbine for outputting power from the first working medium; an intermediate cooler provided at the compressor for cooling the first working medium compressed by a low-pressure compression part of the compressor and supplying the first working medium to a high-pressure compression part of the compressor; and an exhaust heat boiler using as a heating medium an exhaust gas from the turbine, a Rankine cycle engine using the intermediate cooler and the exhaust heat boiler as heat sources and a cooling medium of the intermediate cooler as a second working medium.

Claims

1. A gas turbine engine system comprising:

a compressor configured to compress a first working medium, the compressor comprising a low-pressure compression part and a high-pressure compression part;

a heater configured to heat the compressed first working medium utilizing an external heat source;

a turbine configured to output power from the first working medium; and

a Rankine cycle engine comprising;

an intermediate cooler provided at the compressor; and

an exhaust heat boiler configured to;

use an exhaust gas discharged from the turbine as a heating medium of a second working medium,

cool the first working medium compressed by the low-pressure compression part of the compressor, and

supply the first working medium to the intermediate cooler,

wherein the intermediate cooler is configured to;

further cool the first working medium cooled by the exhaust heat boiler using the second working medium as a cooling medium of the first working medium,

supply the first working medium to the high-pressure compression part,

heat the second working medium, and

supply the second working medium to the exhaust heat boiler.

2. The gas turbine engine system as claimed in claim 1, wherein the second working medium is an organic substance.

3. The gas turbine engine system as claimed in claim 1, wherein the second working medium flowing from the intermediate cooler into the exhaust heat boiler is a superheated gas.

4. The gas turbine engine system as claimed in claim 1 comprising, as the heater, a solar heater configured to heat the first working medium utilizing sunlight as a heat source.