Fuel Saving Inert Gas Generation via Adaptive Air Flow Control
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Solution Overview
Problem
Aircraft inert gas generation systems consume excessive fuel and require high maintenance due to constant operation and oversized air separation modules, which are not optimized for varying phases of flight, leading to inefficient nitrogen enriched air production.
Innovation Solution
An air flow control system that regulates the air flow into the air separation module upstream, reducing air consumption by controlling the flow rate and pressure, allowing for smaller module sizes and adaptive inert gas production based on flight phases, thereby reducing fuel use and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air separation module operates continuously at full capacity, then sufficient inert gas is generated to maintain safety in fuel tanks, but fuel consumption increases and maintenance requirements increase
Solution Approach 1:
The system dynamically adjusts the air separation module operation based on flight phase and inert gas demand. During cruise phases, the module operates at reduced capacity or is shut off, while during takeoff, landing, or abnormal conditions, it operates at full capacity. This dynamic operation resolves the contradiction by matching inert gas generation to actual safety requirements rather than continuous full-capacity operation.
Solution Approach 2:
The system changes operational parameters (air flow rate, module activation state) based on flight conditions. An air flow control system modulates the air flow into the air separation module upstream, allowing the module to operate at optimized capacity levels. This parameter adjustment resolves the contradiction by reducing fuel consumption during low-demand phases while maintaining sufficient inert gas generation during high-demand phases.
2Reliability
If oversized air separation modules are used to ensure sufficient inert gas generation, then safety requirements are met, but device complexity and maintenance needs increase
Solution Approach 1:
Instead of using a single oversized module that operates at partial load, the system uses multiple smaller air separation modules that can be dynamically activated or deactivated based on demand. This allows the system to match inert gas generation capacity to actual requirements, reducing overall device complexity while maintaining sufficient capability during high-demand scenarios.
Solution Approach 2:
The air separation system is divided into multiple independent modules rather than one large module. This segmentation allows selective operation of individual modules based on inert gas demand, reducing the complexity of any single module while maintaining the overall capability to generate sufficient inert gas when needed.
3Use of energy by moving object
If the air separation module operates at reduced capacity during cruise, then fuel consumption decreases, but inert gas generation may become insufficient during critical phases
Solution Approach 1:
The system performs preliminary inert gas generation and accumulates inert gas in the fuel tank ullage before critical phases occur. During cruise, the module operates at reduced capacity to conserve fuel, but maintains sufficient inert gas levels in the tanks. Before takeoff or landing, the system ensures adequate inert gas generation has occurred previously, so safety requirements are met without requiring high-capacity operation during all phases.
Solution Approach 2:
The system uses feedback from flight phase detection and inert gas level monitoring to adjust air separation module operation. Sensors and controllers monitor oxygen levels, flight phase, and inert gas sufficiency, then adjust module operation accordingly. This feedback mechanism ensures fuel efficiency during cruise while maintaining reliability during critical phases by activating full capacity when needed.
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
The air flow control system optimizes inert gas generation, reducing fuel consumption and maintenance by adjusting air flow according to flight phases, ensuring efficient nitrogen enriched air production while extending the life of air separation modules.
Implementation Method 1
an air separation module configured to separate an inert gas from air input into the air separation module
Data Source
AI summary
A method and apparatus for controlling inert gas generation. An apparatus comprises an air separation module and an air flow control system. The air separation module is configured to separate an inert gas from air input into the air separation module. The air flow control system is configured to control the flow of the air into the air separation module.