Fuel Conditioning Control for Gas Turbine Dew Point Stability
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Solution Overview
Problem
Conventional methods to prevent condensate formation in gas fuels for gas turbines require heating the fuel above its dew point, which reduces efficiency and is challenging due to fluctuating dew point temperatures caused by pressure and fuel composition changes, especially during transient phases.
Innovation Solution
A fuel conditioning system with a controller that dynamically adjusts the fuel temperature and pressure to maintain it at or above the dew point, using sensors and heaters to optimize energy use and prevent condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel is heated above its dew point to prevent condensate formation, then condensate formation is prevented, but energy consumption increases
Solution Approach 1:
The patent implements dynamic temperature control that adjusts the fuel temperature based on real-time operating conditions. The controller continuously monitors fuel composition, pressure, and flow rate to dynamically adjust the heating level, ensuring the fuel temperature remains above the dew point without excessive energy input. This resolves the contradiction by making the heating system adaptive rather than static.
Solution Approach 2:
The system employs feedback control where the controller receives input from sensors measuring fuel temperature, pressure, and composition, then adjusts the heater output accordingly. The controller calculates the dew point based on fuel composition and maintains the temperature above this threshold, creating a closed-loop system that prevents condensate formation while optimizing energy consumption.
2Reliability
If the fuel temperature is maintained above the dew point, then condensate formation is prevented, but system complexity increases due to multiple control factors
Solution Approach 1:
The controller performs multiple functions: it calculates the dew point temperature based on fuel composition, monitors fuel flow rate and pressure, adjusts the heating level, and adapts to transient operating phases. By consolidating these diverse control functions into a single multi-functional controller, the system manages complexity while maintaining reliable condensate prevention.
Solution Approach 2:
The system dynamically adjusts multiple parameters including fuel temperature, heating power, and controller setpoints based on operating conditions. The controller modifies these parameters in response to changes in fuel composition, pressure, and flow rate, allowing the system to maintain condensate prevention across varying operating conditions without requiring separate control systems for each parameter.
3Adaptability or versatility
If the fuel temperature is adjusted dynamically, then adaptability to transient phases is improved, but control difficulty increases
Solution Approach 1:
The controller automatically adjusts fuel temperature and heating levels in response to transient operating phases without requiring manual intervention. The system self-regulates by detecting changes in operating conditions and autonomously modifying control parameters, improving adaptability while simplifying operation through automation.
Solution Approach 2:
The controller anticipates and prepares for transient phases by adjusting fuel temperature and heating levels in advance. During detected transient conditions, the system proactively modifies control parameters to prevent condensate formation before it occurs, enhancing adaptability while maintaining straightforward control through automated prediction and response.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system effectively maintains fuel temperature above the dew point, reducing energy consumption and preventing condensate formation while ensuring efficient operation during transient phases.
Implementation Method 1
heating the gas fuel before the gas fuel enters the combustor such that the temperature of the fuel is maintained above its dew point
Data Source
AI summary
A fuel conditioning system includes a heater for selectively adjusting an operating temperature of the fuel and a controller communicatively coupled to the heater. The controller configured to determine a dew point temperature of the fuel and maintain the operating temperature of the fuel at least at the determined dew point temperature of the fuel.