Fuel Control Device Pressure Correction for Gas Turbine Combustion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Variations in pressure differences between fuel pressure upstream of nozzles and corrected fuel pressure at the outlet in a gas turbine combustor lead to inconsistent combustion characteristics.
Innovation Solution
A fuel control device with a stem fuel valve opening degree determination unit, branch line flow rate determination unit, and correction value determination unit that adjusts flow rate adjustment valves based on gas turbine output, operation situation, and pressure differences to maintain consistent fuel distribution across nozzles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pressure differences between fuel pressure upstream of nozzles and corrected fuel pressure at outlet vary, then fuel flow rates to different nozzles become inconsistent, but combustion characteristics deteriorate
Solution Approach 1:
The fuel control device measures the actual fuel pressure at the outlet and compares it with the corrected fuel pressure to calculate pressure differences for each nozzle. Based on these pressure differences, the control device adjusts the opening degrees of flow rate adjustment valves to compensate for pressure variations, thereby maintaining consistent fuel flow rates and stable combustion characteristics across all nozzles.
Solution Approach 2:
The system dynamically changes the opening degree parameter of flow rate adjustment valves based on real-time pressure difference measurements. By adjusting this parameter in response to varying pressure conditions, the system maintains consistent fuel flow rates despite fluctuations in fuel pressure upstream of the nozzles.
2Reliability
If flow rate adjustment valves are adjusted to compensate for pressure differences, then combustion characteristics are maintained, but control system complexity increases
Solution Approach 1:
The fuel control device integrates multiple functions into a single control system: it measures fuel pressure, calculates pressure differences for multiple nozzles, determines appropriate opening degrees, and controls flow rate adjustment valves. This multi-functional integration maintains combustion stability while avoiding the need for separate complex control systems for each nozzle.
Solution Approach 2:
The system automatically measures pressure differences and adjusts valve opening degrees without requiring external intervention or complex manual calibration. The control device self-regulates the fuel flow distribution based on real-time pressure measurements, simplifying operation while maintaining reliable combustion characteristics.
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
Prevents variations in combustion characteristics by determining and applying correction values to flow rate adjustment valves based on pressure differences, ensuring stable fuel distribution and combustion performance.
Implementation Method 1
a correction value determination unit configured to determine a correction value of the opening degree of each flow rate adjustment valve of the branch line on the basis of a value of a pressure difference between a fuel pressure upstream of each of nozzles connected to the branch lines respectively and a corrected fuel pressure for the fuel pressure at an outlet
Data Source
AI summary
A fuel control device includes a stem fuel valve opening degree determination unit, a branch line flow rate determination unit, and a correction value determination unit. The stem fuel valve opening degree determination unit is configured to determine an opening degree of a flow rate adjustment valve of a stem fuel supply line. The branch line flow rate determination unit is configured to determine an opening degree of a flow rate adjustment valve of at least one branch line. The correction value determination unit is configured to determine a correction value of the opening degree of the flow rate adjustment valve of the at least one branch line based on a value of a pressure difference between a fuel pressure upstream of a nozzle connected to the at least one branch line and a corrected fuel pressure for a fuel pressure at an outlet.