초록 ▼

The fuel heat content of fuel is measured on-line while a combustion turbine system is running by measuring data from the combustion turbine system during combustion of the fuel. The measured data are corrected using a standard correction algorithm. The fuel heat content of the fuel is determined us

The fuel heat content of fuel is measured on-line while a combustion turbine system is running by measuring data from the combustion turbine system during combustion of the fuel. The measured data are corrected using a standard correction algorithm. The fuel heat content of the fuel is determined using at least a portion of the corrected data. From the measurement of the fuel heat content, any changes in the fuel heat content are determined. Also, any changes in the control and operational parameters attributable to the change in fuel heat content are determined.

대표청구항 ▼

[ What is claimed is:] [6.]6. A method for determining a fuel heat content of fuel used in a combustion turbine system, the fuel heat content being used in a mathematical model of operation of the combustion turbine system, said method comprising the steps of:measuring data from said combustion turb

[ What is claimed is:] [6.]6. A method for determining a fuel heat content of fuel used in a combustion turbine system, the fuel heat content being used in a mathematical model of operation of the combustion turbine system, said method comprising the steps of:measuring data from said combustion turbine system during combustion of said fuel while said combustion turbine system is on-line and running;correcting the measured data using a standard correction algorithm;calculating a heat rate using at least a portion of the corrected data;calculating a first fuel heat content from the calculated heat rate, wherein the calculated first fuel heat content is used in the mathematical model of the operation of the combustion turbine system;determining an existence of a change in the calculated heat rate wherein the calculated first fuel heat content is used in the mathematical model when the existence of no change in the calculated heat rate is determined;calculating a compressor efficiency and a pressure ratio using at least a portion of the corrected data when the existence of a change in the heat rate is determined;determining an existence of a change in the calculated compressor efficiency and the calculated pressure ratio wherein the calculated first fuel heat content is used in the mathematical model when the existence of a change in the calculated compressor efficiency is determined;calculating a temperature rise across a hot section of said combustion turbine system using at least a portion of the corrected data when the existence of no change in the calculated compressor efficiency is determined;determining an existence of a change in the calculated temperature rise across said hot section of said combustion turbine system wherein the calculated first fuel heat content is used in the mathematical model when the existence of a change in the calculated temperature rise across the hot section is determined;determining a change in the calculated first fuel heat content when the existence of no change in the calculated temperature rise across the hot section is determined;adjusting the calculated first fuel heat content based on the determined change in the calculated first fuel heat content; andusing the adjusted calculated first fuel heat content in the mathematical model of the operation of said combustion turbine system instead of the calculated first fuel heat content.