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Method for the operation of a compressor of a gas turbine with evaporative cooling of the compressor induction air

  • US 7,428,819 B2
  • Filed: 11/22/2006
  • Issued: 09/30/2008
  • Est. Priority Date: 06/22/2004
  • Status: Expired due to Fees
First Claim
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1. A method for operation of a compressor of a gas turbine, in which compressor air inducted from the environment is cooled by means of evaporative cooling before entry into the compressor, the method comprising:

  • before putting the compressor into service, determining maximum possible temperature drops by evaporative cooling in dependence upon different environmental conditions, as a data record, or as both;

    relating the temperature drops to a map of the compressor, from which map maximum temperature fluctuations can be gathered to be observed at different environmental conditions and different RPMs of the compressor to avoid surging; and

    operating the evaporative cooling only when current environmental conditions produce a maximum possible temperature drop, of which a predetermined fractional part, between 50% and 100%, does not exceed the maximum temperature fluctuation gatherable from the map for these environmental conditions and for the current RPM of the compressor.

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