Fuel Injector Tip Cooling With Segmented Passages
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Solution Overview
Problem
Fuel injectors in gasifiers face premature wear due to high temperatures and temperature fluctuations, leading to cracks and reduced lifespan, as existing cooling techniques fail to provide differential cooling effectively.
Innovation Solution
The implementation of an annular coolant chamber with structural supports that divide the chamber into multiple passages, allowing for differential cooling by varying coolant flows, temperatures, and flow rates, particularly targeting the hottest areas with increased coolant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing cooling techniques are used, then the fuel injector structure is simple, but the cooling effectiveness is insufficient and hot spots cause premature wear
Solution Approach 1:
The coolant chamber is divided into multiple passages by structural supports, allowing differential cooling in different regions. This segmentation enables targeted cooling of hot spots while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
Different regions of the fuel injector are provided with different cooling intensities based on their thermal conditions. The multiple passages allow higher coolant flow to hot spots and lower flow to cooler areas, optimizing both reliability and structural efficiency.
2Reliability
If uniform cooling is applied to the entire fuel injector, then the cooling system is simple, but hot spots are not sufficiently cooled leading to premature wear
Solution Approach 1:
The cooling system is segmented into multiple passages that can independently control coolant flow to different regions. This allows differential cooling of hot spots without requiring a completely complex system, achieving reliability through targeted cooling.
Solution Approach 2:
The cooling system provides non-uniform cooling distribution by directing higher coolant flow to regions with higher temperatures. This local quality approach ensures hot spots are sufficiently cooled while maintaining reasonable system complexity.
3Temperature
If increased coolant flow is provided to all areas, then cooling effectiveness improves, but energy consumption increases and cooler areas are over-cooled
Solution Approach 1:
Coolant flow is optimized by providing higher flow rates to hot spots and lower flow rates to cooler areas. This local quality approach improves overall cooling effectiveness while minimizing energy consumption by avoiding unnecessary cooling in cooler regions.
Solution Approach 2:
The cooling system dynamically adjusts coolant flow distribution based on thermal conditions. By controlling flow rates differently in different passages, the system achieves optimal cooling effectiveness while minimizing energy consumption through adaptive flow management.
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 configuration enhances heat transfer, reduces the likelihood of cracks, and extends the life of fuel injectors by providing targeted cooling to hot spots while minimizing cooling in cooler areas.
Implementation Method 1
This configuration enhances heat transfer, reduces the likelihood of cracks, and extends the life of fuel injectors by providing targeted cooling to hot spots
Data Source
AI summary
According to various embodiments, a system includes a gasification fuel injector. The gasification fuel injector includes a tip portion, an annular coolant chamber disposed in the tip portion, and a first structural support extending through the annular coolant chamber. The first structural support divides the annular coolant chamber into a first passage and a second passage.