Concentric Dual Fuel Delivery System for Gas Turbines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dual fuel delivery systems for gas turbine engines face challenges such as complexity, space constraints, and thermal and vibrational instabilities, which affect operational efficiency and flexibility.
Innovation Solution
A dual fuel delivery system comprising a main fuel line with concentric fuel gas and oil conduits, a fuel ring with gas and oil rings, and extension means like bellows and hoses to manage thermal and vibrational stability, along with a fuel manifold for efficient fuel supply, and a dual fuel nozzle for compact and stable fuel injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate fuel ring pipes are used for each fuel type, then fuel delivery capability is provided, but device complexity increases and space requirements increase
Solution Approach 1:
The patent implements a nested concentric tube structure where the inner tube carries one fuel type (e.g., gas) and the outer tube carries another fuel type (e.g., liquid fuel). This nesting approach consolidates what would traditionally require separate pipes into a single integrated assembly, reducing the number of supply lines and connections while maintaining dual fuel delivery capability.
Solution Approach 2:
The patent merges multiple fuel delivery functions into a single integrated fuel nozzle assembly that includes both gas and liquid fuel delivery systems. The concentric tubes are combined with a common body structure and shared connection points, consolidating multiple separate supply lines into a unified device that delivers both fuel types through a single interface.
2Adaptability or versatility
If multiple separate fuel lines are used, then dual fuel supply is achieved, but space constraints are not adequately addressed
Solution Approach 1:
The concentric tube configuration places the inner fuel delivery tube within the outer fuel delivery tube, effectively utilizing the radial space around the inner tube. This nested arrangement allows dual fuel supply while occupying significantly less volumetric space than would be required for two separate parallel pipe installations.
Solution Approach 2:
The patent transitions from a planar or parallel arrangement of fuel lines to a three-dimensional concentric configuration. By utilizing the radial dimension and nesting tubes within tubes, the system achieves compact spatial occupation while maintaining separate fuel delivery pathways, effectively solving the space constraint problem.
3Stability of the object's composition
If rigid fuel delivery system is used, then structural stability is provided, but thermal and vibrational instabilities occur
Solution Approach 1:
The patent incorporates flexible bellows into the fuel delivery system at connection points between rigid components. These bellows act as flexible elements that can expand and contract to accommodate thermal expansion and contraction of the fuel lines, as well as absorb vibrational stresses, thereby maintaining system reliability while preserving the structural stability of the rigid portions.
Solution Approach 2:
The patent employs expansion joints and flexible connections that allow the fuel delivery system to dynamically adjust its physical parameters (length, position) in response to changing thermal and vibrational conditions. This parameter flexibility enables the system to maintain structural integrity and reliability under varying operational conditions without compromising the stability of the overall structure.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present invention relates to dual fuel delivery system for a gas turbine. A dual fuel delivery system (400) for a gas turbine comprises: a main fuel line (402) having a main fuel oil conduit (406) and a main fuel gas conduit (404), wherein the main fuel gas conduit (404) encloses, at least partially, the main fuel oil conduit (406);and a fuel ring (408) connected to the main fuel line (402), the fuel ring having a fuel gas ring (410) connected to the main fuel gas conduit (404) and a fuel oil ring (414) connected to the main fuel oil conduit (406), wherein the fuel gas ring (410) encloses, at least partially, the fuel oil ring (414).