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IGCC design and operation for maximum plant output and minimum heat rate

  • US 7,874,139 B2
  • Filed: 10/13/2006
  • Issued: 01/25/2011
  • Est. Priority Date: 10/13/2006
  • Status: Expired due to Fees
First Claim
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1. A method for operating an integrated gasification combined cycle gas turbine having a design operation point for a chemical potential energy of a fuel stream, comprising:

  • operating an integrated gasification combined cycle gas turbine at a design operation point output and efficiency;

    determining a target output and target efficiency, whereby at least one of the target output and the target efficiency is different than the design operation point output and efficiency of the integrated gasification combined cycle gas turbine; and

    adjusting a chemical potential energy of a fuel stream during operation of the integrated gasification combined cycle gas turbine by changing a heating value of the fuel stream to achieve the target output or target efficiency;

    wherein changing the heating value of the fuel stream comprises at least one of;

    a) increasing the heating value of the fuel stream and decreasing a flow rate of the fuel stream to effect at least one of a decrease in output or an increase in efficiency of the integrated gasification combined cycle gas turbine; and

    b) decreasing the heating value of the fuel stream and increasing a flow rate of the fuel stream to effect at least one of an increase in output or a decrease in efficiency of the integrated gasification combined cycle gas turbine.

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