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Reduced carbon dioxide emission system and method for providing power for refrigerant compression and electrical power for a light hydrocarbon gas liquefaction process using cooled air injection to the turbines

  • US 7,131,272 B2
  • Filed: 09/29/2003
  • Issued: 11/07/2006
  • Est. Priority Date: 09/30/2002
  • Status: Active Grant
First Claim
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1. A reduced carbon dioxide emissions method for providing power for refrigerant compression and shared electrical power for a light hydrocarbon gas liquefaction process, the method comprising:

  • a) cooling an air stream in a stand-alone cooler to a temperature below about 20°

    C. to produce a cooled air stream;

    b) supplying a cooled inlet air stream to at least one light hydrocarbon gas-fired turbine;

    c) compressing a refrigerant in a plurality of compressors driven by a plurality of light hydrocarbon gas-fired turbines fueled by the cooled inlet air stream and a fuel gas stream with the turbines producing an exhaust stream at an elevated temperature;

    d) producing steam at an elevated temperature and pressure by heat exchange with the exhaust stream;

    e) driving a steam turbine with the steam from d) to produce mechanical power; and

    ,f) driving an electrical power generator with the mechanical power from e) to produce electrical power for use in the light hydrocarbon gas liquefaction process.

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