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Feedwater bypass system for a desuperheater

A technology of desuperheater and circulation system, applied in the field of combined circulation system, can solve the problems of increasing pipe cracking and other damage, high thermal shock transmission, etc.

Inactive Publication Date: 2018-04-24
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of cold water can result in higher thermal shock transfer to the thermal liner downstream of the desuperheater as well as the tube metal surface
A consequence of this higher thermal shock may be an increased likelihood of tube splitting and other damage

Method used

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  • Feedwater bypass system for a desuperheater
  • Feedwater bypass system for a desuperheater
  • Feedwater bypass system for a desuperheater

Examples

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Embodiment Construction

[0046] Referring now to the drawings, wherein like numerals indicate like elements throughout the several views. figure 1 is a schematic diagram of an exemplary combined cycle system 100 . Combined cycle system 100 includes gas turbine engine 110 . Gas turbine engine 110 may include a compressor 120 . Compressor 120 compresses an incoming air stream 130 . Compressor 120 delivers compressed air flow 130 to combustor 140 . Combustor 140 mixes compressed air stream 130 with pressurized fuel stream 150 and ignites the mixture to produce combustion gas stream 160 . While only a single combustor 140 is shown, gas turbine engine 110 may include any number of combustors 140 positioned in a circumferential array or the like. Combustion gas flow 160 is then passed to turbine 170 . The flow of combustion gases 160 drives a turbine 170 to produce mechanical work. The mechanical work generated in turbine 170 drives compressor 120 via shaft 180 and drives an external load 190 such as ...

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Abstract

The invention relates to a feedwater bypass system for a desuperheater. The present application provides a combined cycle system. The combined cycle system may include a heat recovery steam generator,a feedwater source positioned upstream of the heat recovery steam generator, a desuperheater positioned downstream of the heat recovery steam generator, a first extraction from the heat recovery steam generator to the desuperheater, and a second extraction from upstream of the heat recovery steam generator to the desuperheater.

Description

technical field [0001] The present application and resulting patent relate generally to combined cycle systems using gas turbine engines, and more particularly to feedwater bypass systems for use with desuperheaters of heat recovery steam generators for increased cooling capacity. Background technique [0002] Combined cycle power generation systems use a combination of gas turbines and steam turbines to generate electricity and / or otherwise to drive loads. In particular, a gas turbine cycle may be operatively combined with a steam turbine cycle by means of a heat recovery steam generator. The heat recovery steam generator may be a multi-zone heat exchanger that allows the feed water used in the steam generation process to be heated and expanded by the hot combustion gases of the gas turbine exhaust. The primary effect of a combined cycle system arrangement is to utilize otherwise "wasted" heat from the hot combustion gases of the gas turbine. Power plant operators therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22G5/12
CPCF22G5/12F01K23/101F22G5/123Y02E20/16F01K23/10F01K3/185F01D15/10F01K7/16F01K7/345F01K13/00F01K15/00F01N5/02F02C6/18F02C3/04H02K7/1823F05D2220/31F05D2220/32F05D2220/62F05D2220/72
Inventor L.萨拉A.纳加萨亚纳姆
Owner GENERAL ELECTRIC TECH GMBH