SYSTEM AND METHOD FOR HEATING MAKE-UP WORKING FLUID OF A STEAM SYSTEM WITH ENGINE FLUID WASTE HEAT

• US 20160245125A1
• Filed: 02/19/2015
• Published: 08/25/2016
• Est. Priority Date: 02/19/2015
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Watkins, Richard Michael
• Granted Patent: US 10,024,195 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01K 11/02 the engines being turbines
• CPC Class Codes: F01K 23/02 the engine cycles being thermally coupled
• CPC Class Codes: F01K 23/065 the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
• CPC Class Codes: F01K 5/00 Plants characterised by use of means for storing steam in an alkali to increase steam pressure, e.g. of Honigmann or Koenemann type
• CPC Class Codes: F01K 7/44 Use of steam for feed-water heating and another purpose
• 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 7/143 before or between the compressor stages
• CPC Class Codes: F05D 2220/60 making use of surplus or waste energy
• CPC Class Codes: F05D 2220/72 a steam turbine
• CPC Class Codes: F05D 2260/211 by intercooling, e.g. during a compression cycle
• CPC Class Codes: F05D 2260/213 by the provision of a heat exchanger within the cooling circuit
• CPC Class Codes: F05D 2260/61 Removal of CO2 removal of CO2 from waste gases B01D53/62
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Abstract

A system including an engine and a heat exchanger coupled to the engine is provided. The engine includes an engine fluid and at least one of a compressor section configured to compress a gas, a lubricant path configured to circulate a lubricant, or a coolant path configured to circulate a coolant. The engine fluid comprises at least one of the gas, the lubricant, or the coolant, and the engine fluid is a source of heat derived from one or more operations of the engine. The heat exchanger is configured to receive the engine fluid from the engine and exchange heat between the engine fluid and a working fluid to produce a heated working fluid and a cooled engine fluid, and the heat exchanger is configured to export the heated working fluid to a steam system.

Claims

1. A system, comprising:

an engine comprising an engine fluid and at least one of a compressor section configured to compress a gas, a lubricant path configured to circulate a lubricant, or a coolant path configured to circulate a coolant, wherein the engine fluid comprises at least one of the gas, the lubricant, or the coolant, and wherein the engine fluid is a source of heat derived from one or more operations of the engine; and

a heat exchanger coupled to the engine, wherein the heat exchanger is configured to receive the engine fluid from the engine and exchange heat between the engine fluid and a working fluid to produce a heated working fluid and a cooled engine fluid, and the heat exchanger is configured to export the heated working fluid to a steam system.

2. The system of claim 1, comprising the steam system configured to receive the heated working fluid from the heat exchanger as a make-up water supply of working fluid to replace working fluid lost within a process of the steam system.

3. The system of claim 2, wherein the steam system comprises a deaerator configured to receive the heated working fluid from the heat exchanger and remove at least one of one or more corrosive substances and/or dissolved gases from the heated working fluid to produce a deaerated heated working fluid.

4. The system of claim 3, wherein the steam system comprises:

a boiler configured to receive the deaerated heated working fluid from the deaerator to generate a steam; and

a steam turbine coupled to the boiler, wherein the steam turbine is configured to drive a load using at least the steam.

5. The system of claim 1, wherein the engine comprises a gas turbine engine.

6. The system of claim 1, wherein the engine comprises the at least one compressor section configured to compress the gas, and the engine fluid comprises the gas.

7. The system of claim 6, wherein the gas comprises an oxidant.

8. The system of claim 1, wherein the engine comprises a lubricant path configured to circulate a lubricant, and the engine fluid comprises the lubricant.

9. The system of claim 1, wherein the engine comprises a coolant path configured to circulate a coolant, and the engine fluid comprises the coolant.

10. The system of claim 1, wherein the working fluid comprises a replacement make-up water, and the heated working fluid comprises a heated replacement make-up water.

11. The system of claim 1, comprising a controller configured to regulate operation of one or more valves to control a flow of the working fluid or the heated working fluid through the heat exchanger.

12. The system of claim 1, comprising a controller configured to regulate operation of one or more valves to control a flow of the heated working fluid exported from the heat exchanger to the steam system.

13. A system, comprising:

a deaerator of a steam system, wherein the deaerator is configured to receive a heated working fluid exported from a heat exchanger coupled to at least one of a compressor section, a lubricant path, or a coolant path of an engine, wherein the deaerator is configured to remove one or more corrosive substances and/or dissolved gases from the heated working fluid to produce a deaerated heated working fluid prior to steam generation in the steam system.

14. The system of claim 13, comprising the heat exchanger coupled to the deaerator.

15. The system of claim 13, comprising a controller configured to control a flow and a temperature of the heated working fluid to facilitate deaeration of the heated working fluid in the deaerator.

16. The system of claim 13, comprising:

a boiler configured to receive the deaerated heated working fluid from the deaerator, wherein the boiler generates a steam based on heat exchange between the deaerated heated working fluid and an exhaust gas from the engine; and

a steam turbine coupled to the boiler, wherein the steam turbine is configured to drive a load with the steam.

17. The system of claim 13, comprising the engine, wherein the engine comprises a gas turbine engine having the heat exchanger coupled to a first compressor section and a second compressor section of the gas turbine engine, and the heat exchanger is configured to cool a compressed gas between the first and second compressor sections.

18. A method, comprising:

flowing a working fluid through a heat exchanger;

exchanging heat between the working fluid and an engine fluid from at least one of a compressor section, a lubricant path, or a coolant path of an engine to generate a heated working fluid and a cooled engine fluid;

exporting the heated working fluid from the heat exchanger to a steam system; and

producing, via the steam system, a steam supply utilizing at least a portion of the heated working fluid.

19. The method of claim 18, comprising:

flowing the heated working fluid from the heat exchanger to a deaerator of the steam system;

removing one or more corrosive components and/or dissolved gases of the heated working fluid to produce a deaerated heated working fluid; and

routing the deaerated heated working fluid to a boiler configured to produce steam at least in part based on the deaerated heated working fluid.

20. The method of claim 18, comprising regulating, via a controller, a flow rate of the heated working fluid exported from the heat exchanger to the steam system based on sensor feedback from one or more sensors coupled to the engine, the heat exchanger, or the steam system.

21. The method of claim 18, comprising adjusting, via a controller, a flow rate of the heated working fluid exported from the heat exchanger to the steam system with one or more flow control devices coupled to the engine, the heat exchanger, or the steam system.