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Combustion Chamber Cooling Method and System

Inactive Publication Date: 2011-12-15
VYKSON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When low calorific gases are used, the volume of gas required to produce the necessary heat release becomes very large.
), for example if the engine is operating on a recuperated cycle, the outer sleeve will no longer be cooled or sufficiently cooled, and will become very hot.
This causes a large reduction in the strength of the material forming the sleeve, and produces excessive heat loss from the engine, thus reducing the thermal efficiency of the engine.

Method used

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  • Combustion Chamber Cooling Method and System
  • Combustion Chamber Cooling Method and System
  • Combustion Chamber Cooling Method and System

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Embodiment Construction

[0018]Referring now to the accompanying drawings, there is illustrated a cooling system, generally indicated as 10, for use with a conventional gas turbine combustion assembly as illustrated in FIG. 1, which comprises an inner flame tube F which is fed with gaseous fuel via a feed pipe P, the flame tube F being surrounded by an outer sleeve S into which pressurized air is supplied, and injected into the flame tube F via an array of holes in the outer wall of the flame tube F.

[0019]Referring now in particular to FIGS. 2 and 3, the system 10 is illustrated in combination with the conventional flame tube F and outer sleeve S, the system 10 comprising a vessel 12 which is shaped and dimensioned to be concentrically located about the outer sleeve S, in order to substantially enclose the outer sleeve S. The system 10 further comprises a fluid inlet 14 communicating with the vessel 12 at one end thereof, and a fluid outlet 16, preferably communicating with the vessel 12 at an opposed end t...

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Abstract

A cooling system for use with a gas turbine combustion assembly having a flame tube and a surrounding air delivery sleeve, the system comprising a vessel shaped and dimensioned to surround the air delivery sleeve and adapted for fluid flow there through. A method of cooling a combustion assembly includes the step of directing a flow of fluid over an outer surface of the delivery sleeve.

Description

BACKGROUND [0001]The present disclosure concerns a combustion chamber cooling method and system, and in particular a method and system adapted for use with a gas turbine operable to run on low calorific value gas fuel, for example a “low quality” gas typically containing 20% methane and 80% CO2.[0002]When gaseous fuels are used in a gas turbine engine, the fuel gas must be compressed to a pressure above the engine cycle pressure, so that the gas can be injected into the engine combustion chamber. When low calorific gases are used, the volume of gas required to produce the necessary heat release becomes very large. It is, therefore, beneficial to use a turbo compressor driven by a turbine, the high pressure gas used to power the turbine being extracted from the engine cycle.[0003]Air from the engine's compressor flows into an annulus between a flame tube and an outer sleeve surrounding the flame tube. This high pressure air enters the same tube through rows of holes at various points...

Claims

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Application Information

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IPC IPC(8): F01P11/00
CPCF23R2900/00002F23R3/005
Inventor OAKLEY, JAMESARTT, DAVID WILLIAMSPENCE, STEPHEN WILLIAM THOMAS
Owner VYKSON