Thermodynamic Model for Real-Time Engine Emissions Calculation
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Solution Overview
Problem
Conventional methods for estimating gas turbine engine emissions lack accuracy due to failure to capture real-time parameters such as fuel, operating speed, and individual engine characteristics, leading to insufficiently precise emissions calculations.
Innovation Solution
An operations support system that includes a diagnostics unit using a thermodynamic model based on component maps to generate condition indicators, an emissions calculation unit to calculate real-time emissions, and a graphical user interface to display emissions information, enabling real-time monitoring and adjustment of engine operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional emissions estimation methods are used based on manufacturer information or sensor sampling, then the system is simple to implement, but the measurement precision of emissions data is insufficient
Solution Approach 1:
The patent introduces a thermodynamic model as an intermediary between raw engine data and emissions calculations. This model processes multiple engine parameters (fuel type, operating speed, temperature, pressure) through scientifically-based thermodynamic relationships to generate accurate emissions estimates without requiring direct sensor measurement of each emission component.
Solution Approach 2:
The thermodynamic model serves multiple functions simultaneously: it calculates emissions for different engine operating conditions, accommodates various fuel types, and provides condition indicators for engine health monitoring. This multi-functionality achieves high measurement precision across diverse scenarios without proportionally increasing system complexity.
2Measurement precision
If real-time emissions monitoring is implemented using a thermodynamic model with multiple parameters, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The system performs preliminary calculations by pre-establishing thermodynamic models and component maps that encode complex emission relationships. During real-time operation, the system only needs to input current engine parameters into these pre-configured models, avoiding the need for complex real-time simulations while maintaining high accuracy.
Solution Approach 2:
The system continuously monitors engine operating conditions and feeds this data back into the thermodynamic model to update emissions calculations in real-time. This feedback mechanism allows the system to adapt to changing engine conditions while using the same underlying model structure, maintaining precision without requiring multiple different models.
3Reliability
If conventional emissions estimation is used for regulatory compliance, then the ease of operation is maintained, but the reliability of emissions information is insufficient
Solution Approach 1:
The thermodynamic model automatically calculates emissions based on engine operating parameters without requiring manual intervention or complex configuration by operators. The system self-adjusts to different engine conditions and fuel types using the embedded thermodynamic relationships, providing reliable emissions information while maintaining ease of operation through automated processing.
Data Source
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AI summary
In accordance with an exemplary embodiment, an operations support system for an engine is provided. A diagnostics unit is configured to receive engine data from the engine and to generate condition indicators based on the engine data using a thermodynamic model, the thermodynamic model being based on component maps associated with the engine. An emissions calculation unit is coupled to the diagnostic unit and configured to calculate emissions information for the engine based on the condition indicators. A graphical user interface is coupled to the emissions calculation unit and configured to display the emissions information.