Method to synchronize data when used for input/loss performance monitoring of a power plant
DCFirst Claim
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1. A method for quantifying the operation of a fossil-fired thermal system in which a fuel chemistry and fuel heating value of the fossil-fired thermal system are determined based on real time data acquired through a monitoring the fossil-fired thermal system, the method comprising the steps of:
- selecting an Input/Loss Method which is capable of determining a complete As-Fired fuel chemistry, including fuel water and fuel ash, as a function of reference fuel characteristics, explicit mathematical models of the combustion process, a set of measurable operating parameters, an obtained effluent H2O, an obtained Air/Fuel ratio, an ambient concentration of O2 and an air pre-heater leakage factor, and also capable of determining a consistent As-Fired fuel heating value as a function of the complete As-Fired fuel chemistry and the reference fuel characteristics, resulting in a selected Input/Loss Method capable of determining the fuel chemistry and fuel heating value;
obtaining a set of multiple data collections, each collection consisting of individual data points describing the fossil-fired thermal system;
determining a set of time delays for individual data points associated with the step of obtaining the set of multiple data collections;
determining a synchronous collection of data dependent on the set of time delays for individual data points and the set of multiple data collections; and
determining the fuel chemistry and fuel heating value of the fossil-fired thermal system based on the selected Input/Loss Method and the synchronous collection of data.
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Abstract
The operation of a fossil-fired thermal system is quantified by recognizing and correcting data collections which must be synchronized to improve the accuracy of analytical models which determine fuel chemistry, fuel heating value, boiler efficiency, fuel energy flow and/or system heat rate.
31 Citations
5 Claims
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1. A method for quantifying the operation of a fossil-fired thermal system in which a fuel chemistry and fuel heating value of the fossil-fired thermal system are determined based on real time data acquired through a monitoring the fossil-fired thermal system, the method comprising the steps of:
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selecting an Input/Loss Method which is capable of determining a complete As-Fired fuel chemistry, including fuel water and fuel ash, as a function of reference fuel characteristics, explicit mathematical models of the combustion process, a set of measurable operating parameters, an obtained effluent H2O, an obtained Air/Fuel ratio, an ambient concentration of O2 and an air pre-heater leakage factor, and also capable of determining a consistent As-Fired fuel heating value as a function of the complete As-Fired fuel chemistry and the reference fuel characteristics, resulting in a selected Input/Loss Method capable of determining the fuel chemistry and fuel heating value;
obtaining a set of multiple data collections, each collection consisting of individual data points describing the fossil-fired thermal system;
determining a set of time delays for individual data points associated with the step of obtaining the set of multiple data collections;
determining a synchronous collection of data dependent on the set of time delays for individual data points and the set of multiple data collections; and
determining the fuel chemistry and fuel heating value of the fossil-fired thermal system based on the selected Input/Loss Method and the synchronous collection of data.
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2. A method for quantifying the operation of a fossil-fired thermal system in which a boiler efficiency of the fossil-fired thermal system is determined based on real time data acquired through a monitoring of the fossil-fired thermal system, the method comprising:
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selecting an Input/Loss Method which is capable of determining the boiler efficiency, said determination of the boiler efficiency comprising the concept of using a fuel'"'"'s calorimetric temperature for the thermodynamic reference energy level of an Enthalpy of Products term, for the thermodynamic reference energy level of an Enthalpy of Reactants term, and also for the thermodynamic reference energy level of a Firing Correction term evaluated independent of a fuel flow and an effluent flow, said terms comprising the major terms of a computed boiler efficiency, resulting in a selected Input/Loss Method capable of determining the boiler efficiency;
obtaining a set of multiple data collections, each collection consisting of individual data points describing the fossil-fired thermal system;
determining a set of time delays for individual data points associated with the step of obtaining the set of multiple data collections;
determining a synchronous collection of data dependent on the set of time delays for individual data points and the set of multiple data collections; and
determining the boiler efficiency of the fossil-fired thermal system based on the selected Input/Loss Method and the synchronous collection of data. - View Dependent Claims (3, 4)
selecting the Input/Loss Method which is capable of determining a higher heating value boiler efficiency, said determination of the higher heating value boiler efficiency comprising the concept of using a fuel'"'"'s calorimetric temperature for the thermodynamic reference energy level of an Enthalpy of Products term, for the thermodynamic reference energy level of an Enthalpy of Reactants term, and also for the thermodynamic reference energy level of a Firing Correction term evaluated independent of a fuel flow and an effluent flow, said terms comprising the major terms of a computed higher heating value boiler efficiency, resulting in the selected Input/Loss Method capable of determining the higher heating value boiler efficiency.
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4. The method of claim 2, wherein the step of selecting the Input/Loss Method, includes the step of:
selecting the Input/Loss Method which is capable of determining a lower heating value boiler efficiency, said determination of the lower heating value boiler efficiency comprising the concept of using a fuel'"'"'s calorimetric temperature for the thermodynamic reference energy level of an Enthalpy of Products term, for the thermodynamic reference energy level of an Enthalpy of Reactants term, and also for the thermodynamic reference energy level of a Firing Correction term evaluated independent of a fuel flow and an effluent flow, said terms comprising the major terms of a computed lower heating value boiler efficiency, resulting in the selected Input/Loss Method capable of determining the lower heating value boiler efficiency.
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5. A method for quantifying the operation of a fossil-fired thermal system in which a heat rate of the fossil-fired thermal system is determined based on real time data acquired through a monitoring the fossil-fired thermal system, the method comprising the steps of:
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selecting a L Factor method which is capable of determining the heat rate of the fossil-fired thermal system, said determination of the heat rate comprising the concepts of a corrected L Factor, a corrected total effluents mass flow rate and a produced electrical power, resulting in a selected L Factor method capable of determining the heat rate of the fossil-fired thermal system;
obtaining a set of multiple data collections, each collection consisting of individual data points describing the fossil-fired thermal system;
determining a set of time delays for individual data points associated with the step of obtaining the set of multiple data collections;
determining a synchronous collection of data dependent on the set of time delays for individual data points and the set of multiple data collections; and
determining the heat rate of the fossil-fired thermal system based on the selected L Factor method and the synchronous collection of data.
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Specification