# US 2014/0196437 A1 · Method for operating a static gas turbine, and intake duct for intake air of a gas turbine

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- Number: US 2014/0196437 A1
- Document ID: US20140196437A1
- Status: Published application
- Kind: A1
- Application number: 14/233,626
- Filed: 2012-07-13
- Published: 2014-07-17
- Earliest claimed: 2011-07-21
- Assignees: Siemens Aktiengesellschaft
- Inventors: Oliver Schneider
- Web page: https://patentgrep.com/patent/US20140196437A1

## CPC

- F02M 35/10: Air intakes; Induction systems
- F02C 7/05: having provisions for obviating the penetration of damaging objects or particles
- F02C 7/052: with dust-separation devices
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)

## Abstract

An ambient air intake duct of a static gas turbine is provided, having at least one filter, which is arranged in the intake duct, for cleaning the ambient air (A) that can flow through the intake duct. A method for operating a static gas turbine which is equipped with a filter for cleaning the ambient air (A) is also provided. To rapidly provide a higher level of gas turbine power to a generator, it is provided that, by means of a bypass or by means of flaps arranged downstream of the filter, partially to completely unfiltered ambient air (A) can temporarily flow into the compressor inlet.

## Claims

### Claim 1

A method for operating a static gas turbine equipped with at least one filter for purifying intake air, comprising:
circumventing the filter from time to time such that partially to entirely unfiltered ambient air flows into the static gas turbine.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein circumventing the filter is carried out for frequency support and/or to increase the power output of the gas turbine.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein unfiltered ambient air flows in at most for a predefined period.

### Claim 4 (depends on 1)

The method as claimed in claim 1, further comprising:
washing a compressor once the intake of unfiltered ambient air has finished.

### Claim 5

An intake duct for intake air of a static gas turbine, having at least one filter arranged in the intake duct for purifying the intake air which can be made to flow through the intake duct, comprising:
a bypass for circumventing the filter or filters and/or at least one closable opening, arranged downstream of the filter, provided in a wall of the intake duct for letting in ambient air.

### Claim 6 (depends on 5)

The intake duct as claimed in claim 5, wherein
the closable openings are formed as flaps.