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US6694722B2 Expired / Lapsed US ⏱️ 0.0 years remaining

Recuperator for thermal power installation

Assignee: GE Vernova GmbH
•
Filing: 2002-03-26
•
Granted: 2004-02-24
•
Expires: 2022-03-26
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Abstract

Abstract A recuperator ( 10 ) in a thermal power installation such as, for example, a gas turbine installation or air storage power installation, having turbines ( 15 a, 15 b ) and a generator (G), has sectors (S 1 -S 4 ) with tubes for the circulation of air. Hot exhaust gases from the turbines ( 15 a, 15 b ) are supplied to the recuperator ( 10 ) for the purpose of heating the air flowing through the sectors (S 1 -S 4 ). According to the invention, the recuperator ( 10 ) has one or a plurality of external heat storage devices (HS 1, HS 2, HS 3 ) which are connected between the (S 1 -S 4 ) of the recuperator ( 10 ) and are heated during the normal operation of the power installation. During an outage period of the power installation, air is circulated through the installation components ( 10, 15 a, 15 b, 19 ), a temperature distribution being maintained in these components with temperature differences which are smaller than a critical magnitude with respect to transient thermal stresses in the components of the recuperator. After an outage period, the power installation can be started up to full load in a short time and without risk with respect to transient thermal stresses in the recuperator ( 10 ), turbines ( 15 a, 15 b ) and combustion chamber ( 19 ).

Inventors

  • 👤 Franz Kreitmeier

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 01:32
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/14; F02C6/16; F02C7/00; F02C7/08; F02C7/10; Y; Y02; Y02E; Y02E60/00; Y02E60/16

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 97 words
A recuperator for thermal power installation having at least one turbine, at least one combustion chamber and a generator (G), the recuperator having one or a plurality of sectors with tubes for the purpose of heating air by heat exchange from exhaust gases from the at least one turbine and being connected to a duct for the supply of air and a transfer duct to the at least one turbine, wherein the recuperator comprises one or a plurality of external heat storage devices, which are connected between two sectors of the plurality of sectors of the recuperator.
Claim 2
Dependent Claim 97 words
A recuperator for thermal power installation having at least one turbine, at least one combustion chamber and a generator (G), the recuperator having one or a plurality of sectors with tubes for the purpose of heating air by heat exchange from exhaust gases from the at least one turbine and being connected to a duct for the supply of air and a transfer duct to the at least one turbine, wherein the recuperator comprises one or a plurality of external heat storage devices, which are connected between two sectors of the plurality of sectors of the recuperator.
Claim 3
Dependent Claim 28 words
The recuperator as claimed in claim 1 , wherein the one or a plurality of external heat storage devices contain water, sand or stone as heat storage medium.
Claim 4
Dependent Claim 31 words
The recuperator as claimed in claim 1 , wherein the one or a plurality of external heat storage devices are configured as chemical heat storage device or latent heat storage device.
Claim 5
Dependent Claim 29 words
The recuperator as claimed in claim 1 , wherein the temperature difference between two successive external heat storage devices in the air flow direction is less than 100 K.
Claim 6
Dependent Claim 29 words
The recuperator as claimed in claim 1 , wherein the temperature difference between two successive external heat storage devices in the air flow direction is less than 130 K.
Claim 7
Dependent Claim 29 words
The recuperator as claimed in claim 1 , wherein the temperature difference between two successive external heat storage devices in the air flow direction is less than 160 K.

References Cited (Backward Citations)

GB753930A Cited
US2973622A Cited
US3677008A Cited
US3872673A Cited
US4043120A Cited
DE2444909A1 Cited
US4150547A Cited
US4147204A Cited
EP0003980A1 Cited
US4523432A Cited
JPH0861085A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2007-02-23 2007-08-25 2008-02-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2011-02-23 2011-08-25 2012-02-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2015-02-23 2015-08-25 2016-02-24 $7700.00 Window Closed / Lapsed

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