Aircraft Dihydrogen Pipe Aeration for Leak Dilution
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Solution Overview
Problem
The use of dihydrogen as an energy source in aircraft is hindered by the need for extensive safety measures to prevent flammable mixtures in the event of leaks, leading to increased mass, cost, and energy consumption, as well as integration and monitoring challenges.
Innovation Solution
An aircraft design incorporating a dihydrogen transport pipe with an embedding channel and aeration system featuring gutters, ventilation windows, and a control unit for managing airflow to dilute and vent leaked dihydrogen, using detection means and movable doors and flaps to regulate airflow based on leak detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated ventilation devices are installed along the transport pipe to prevent flammable mixtures in case of dihydrogen leaks, then safety is improved, but mass, cost, energy consumption, and device complexity increase substantially
Solution Approach 1:
The patent merges multiple ventilation functions into a single integrated aeration system with a common air inlet and distributed supply pipes that serve multiple embedding channels. This consolidation reduces the number of separate ventilation devices needed, thereby decreasing mass, cost, and complexity while maintaining safety through centralized airflow management that can respond to leaks anywhere along the transport pipe.
2Reliability
If dedicated ventilation devices are installed along the transport pipe to prevent flammable mixtures in case of dihydrogen leaks, then safety is improved, but mass, cost, energy consumption, and device complexity increase substantially
Solution Approach 1:
The patent merges multiple ventilation functions into a single integrated aeration system with a common air inlet and distributed supply pipes that serve multiple embedding channels. This consolidation reduces the number of separate ventilation devices needed, thereby decreasing mass, cost, and complexity while maintaining safety through centralized airflow management that can respond to leaks anywhere along the transport pipe.
3Reliability
If dedicated ventilation devices are installed along the transport pipe to prevent flammable mixtures in case of dihydrogen leaks, then safety is improved, but real-time monitoring and control of each device operation becomes necessary, increasing system complexity
Solution Approach 1:
The aeration system incorporates detection means distributed in each embedding channel that automatically detect dihydrogen presence and trigger the control unit to activate ventilation through the bypass box and supply pipes. This self-service mechanism eliminates the need for continuous manual monitoring of each device, as the system autonomously responds to leaks through integrated sensing and actuation, reducing operational complexity while maintaining safety.
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 system effectively dilutes and vents leaked dihydrogen, minimizing fire risk and reducing mass, cost, and energy penalties by automating airflow management, thus enhancing safety and efficiency.
Implementation Method 1
an aeration system having an aeration aperture arranged to collect air outside the aircraft and at least one supply pipe wherein each one opens at said air inlet via a window
Implementation Method 2
detection means distributed in each embedding channel and arranged to detect the presence of dihydrogen
Implementation Method 3
a maneuvering system controlled by the control unit and arranged to move said door alternately from the open position to the closed position
Data Source
AI summary
An aircraft having at least one dihydrogen transport pipe, an embedding channel with a lower gutter, an aeration aperture with an air inlet collecting external air and at least one supply pipe opening at the air inlet, a control unit, and, for one or more lower gutters, a bypass box having, for each lower gutter, an inlet connected to the supply pipe and an outlet connected to the lower gutter, between each associated inlet and outlet, a door able to move alternately between an open position and a closed position, and, for each door, a maneuvering system controlled by the control unit and moving the door.