Gas turbine lower heating value methods and systems
First Claim
Patent Images
1. A control system for a gas turbine system, comprising:
- a controller comprising a processor, wherein the processor is configured to;
receive a plurality of signals comprising a temperature signal, a pressure signal, a speed signal and a mass flow signal from sensors disposed in the gas turbine system;
execute a heating value model to derive a Lower Heating Value (LHV) for a gas turbine fuel combusted by the gas turbine system, using the plurality of signals as input to the heating value model;
control operations of the gas turbine system based on the LHV derived via the heating value model, wherein the heating value model comprises at least one LHV dynamic equation configured to use as input at least a plurality of enthalpy values, a fuel-to-air ratio and a value for sensed mass air flow into a combustor, wherein the LHV dynamic equation comprises LHV=(HFL*(WAR36+FAR+1.0)−
H3/FAR)−
C, wherein HFL comprises a first enthalpy of the gas turbine fuel having a range of between 30 to 60 Wobbe numbers, FAR comprises the fuel-to-air ratio, H3 comprises a second enthalpy, C comprises a constant, and WAR36 comprises the value for sensed mass air flow into the combustor and sensed via the mass flow signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A control system for a gas turbine includes a controller. The controller includes a processor configured to receive a plurality of signals comprising a temperature signal, a pressure signal, a speed signal, a mass flow signal, or a combination thereof, from sensors disposed in the gas turbine system. The processor is further configured to apply the plurality of signals as input to a heating value model. The processor is also configured to execute the heating value model to derive a heating value for a fuel combusted by the gas turbine system. The processor is additionally configured to control operations of the gas turbine system based on the heating value for the fuel.
-
Citations
14 Claims
-
1. A control system for a gas turbine system, comprising:
-
a controller comprising a processor, wherein the processor is configured to; receive a plurality of signals comprising a temperature signal, a pressure signal, a speed signal and a mass flow signal from sensors disposed in the gas turbine system; execute a heating value model to derive a Lower Heating Value (LHV) for a gas turbine fuel combusted by the gas turbine system, using the plurality of signals as input to the heating value model; control operations of the gas turbine system based on the LHV derived via the heating value model, wherein the heating value model comprises at least one LHV dynamic equation configured to use as input at least a plurality of enthalpy values, a fuel-to-air ratio and a value for sensed mass air flow into a combustor, wherein the LHV dynamic equation comprises LHV=(HFL*(WAR36+FAR+1.0)−
H3/FAR)−
C, wherein HFL comprises a first enthalpy of the gas turbine fuel having a range of between 30 to 60 Wobbe numbers, FAR comprises the fuel-to-air ratio, H3 comprises a second enthalpy, C comprises a constant, and WAR36 comprises the value for sensed mass air flow into the combustor and sensed via the mass flow signal. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A non-transitory computer-readable medium having computer executable code stored thereon, the computer executable code comprising instructions to:
-
receive a plurality of signals comprising a temperature signal, a pressure signal, a speed signal and a mass flow signal from sensors disposed in a gas turbine system; execute a heating value model to derive a Lower Heating Value (LHV) for a gas turbine fuel combusted by the gas turbine system, using the plurality of signals as input to the heating value model; control operations of the gas turbine system based on the LHV derived via the heating value model, wherein the heating value model comprises at least one LHV dynamic equation configured to use as input at least a plurality of enthalpy values, a fuel-to-air ratio and a value for sensed mass air flow into a combustor, wherein the LHV dynamic equation comprises LHV=(HFL*(WAR36+FAR+1.0)−
H3/FAR)−
C, wherein HFL comprises a first enthalpy of the gas turbine fuel having a range of between 30 to 60 Wobbe numbers, FAR comprises the fuel-to-air ratio, H3 comprises a second enthalpy, C comprises a constant, and WAR36 comprises the value for sensed mass air flow into the combustor and sensed via the mass flow signal. - View Dependent Claims (8, 9, 10, 11)
-
-
12. A method for a gas turbine system, comprising:
-
receiving a plurality of signals comprising a temperature signal, a pressure signal, a speed signal and a mass flow signal from sensors disposed in the gas turbine system; executing a heating value model to derive a Lower Heating Value (LHV) for a gas turbine fuel combusted by the gas turbine system, using the plurality of signals as input to the heating value model; controlling operations of the gas turbine system based on the LHV derived via the heating value model, wherein the heating value model comprises at least one LHV dynamic equation configured to use as input at least a plurality of enthalpy values, a fuel-to-air ratio and a value for sensed mass air flow into a combustor, wherein the LHV dynamic equation comprises LHV=(HFL*(WAR36+FAR+1.0)−
H3/FAR)−
C, wherein HFL comprises a first enthalpy of the gas turbine fuel having a range of between 30 to 60 Wobbe numbers, FAR comprises the fuel-to-air ratio, H3 comprises a second enthalpy, C comprises a constant, and WAR36 comprises the value for sensed mass air flow into the combustor and sensed via the mass flow signal. - View Dependent Claims (13, 14)
-
Specification