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Method for operating a gas turbine below the nominal power thereof

A gas turbine, rated power technology, applied in the direction of gas turbine devices, combustion control, mechanical equipment, etc., can solve the problems of reducing the efficiency of gas turbines, achieve stable adjustment characteristics, improve efficiency, and avoid the effects of temperature gradients

Active Publication Date: 2015-11-18
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage, however, is that this mode of operation known from the prior art unnecessarily reduces the efficiency of the gas turbine, since the bypassed compressed air is not used for the conversion of work in the gas turbine

Method used

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  • Method for operating a gas turbine below the nominal power thereof
  • Method for operating a gas turbine below the nominal power thereof

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Embodiment Construction

[0024] figure 1 A stationary gas turbine 10 is shown schematically with a compressor 12 and a turbine unit 14 , the rotor of which is rigidly coupled to the rotor of compressor 12 . A combustion chamber 16 is provided between the compressor output and the turbine unit 14 . The combustion chamber can be designed as a circular combustion chamber, as a tubular combustion chamber or as an annular combustion chamber. In the case of tubular combustors, there are usually 10, 12 or more tubular combustors. Also coupled to the compressor rotor is a generator 11 for generating electric current. At the inlet of the compressor 12 there are compressor inlet guide vanes 13 which are pivotable about their longitudinal axis, by means of which guide vanes 13 the compressor mass flow m can be adjusted V . These guide vanes 13 are only shown schematically. The turbine unit 14 comprises according to this embodiment 4 successive turbine stages 14 a 、14 b 、14 c and 14 d , which are likewis...

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Abstract

The invention relates to a method for operating a gas turbine (10) below the nominal power thereof, comprising the following steps: determining a lower power threshold value (P1@TATK=const. ) of the gas turbine (10) as the power threshold value from which additional lowering of the output gas turbine power causes the gas turbine to leave a CO-emission-compliant partial load range of the gas turbine (10); providing a specified threshold value (p2) for an output gas turbine power, wherein the specified threshold value (p2) is less than the nominal power of the gas turbine; and operating the gas turbine (10) at an output gas turbine power above the specified threshold value (p2) at a constant exhaust gas temperature, wherein the inlet guide blades (13) of a compressor (12) of the gas turbine are closed further in order to reduce the output gas turbine power. In order to avoid larger temperature gradients in the preparation of an especially low partial load operation of the gas turbine (10), a sufficiently large valve is selected for the specified threshold value (p2) that the increases of the primary zone temperature, the combustion temperature, and the exhaust temperature extend over a CO-emission-compliant partial load range of the gas turbine (10) that is as large as possible.

Description

technical field [0001] The invention relates to a method for operating a gas turbine below its rated power, comprising the following steps: [0002] - determining the lower power limit value of the gas turbine as the power limit value from which a further reduction in the output power of the gas turbine leads to a departure from the part load range of the gas turbine's CO emission compliance; [0003] - providing a predetermined limit value for the output power of the gas turbine, wherein the predetermined limit value is smaller than the rated power of the gas turbine; [0004] - operation of the gas turbine at a constant mean exhaust gas temperature, or an adjustment calculated therefrom (hereinafter referred to as exhaust gas temperature), with the output of the gas turbine above a predetermined limit value, wherein the feed of the compressor of the gas turbine is adjusted The air guide vanes are further closed to reduce the gas turbine output power. Background technique ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C9/22F02C9/28
CPCF02C9/22F02C9/28F05D2270/08F05D2270/303F05D2270/083F23N2900/05001F23N2241/20F02C3/04F02C9/20F05D2220/32F05D2270/05
Inventor T.恩格勒M.戈林斯基M.古特穆思P.克罗伊策M.林克N.萨维利厄斯K.休塞尔贝克M.特蒂尔特
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG
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