Hydrogen-Powered Aircraft H2 Box Mounting for Congested Nacelles
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Solution Overview
Problem
The installation of a hydrogen (H2) box in a nacelle of a hydrogen-powered aircraft is challenging due to its weight and bulk, as the nacelle is congested and lacks sufficient space.
Innovation Solution
A method involving the use of rails secured to the nacelle's chassis and/or the H2 box for positioning, which allows the H2 box to be installed without adding further mass, with the rails being removable after installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the H2 box is designed to contain all necessary equipment for hydrogen transport, then the equipment completeness is improved, but the weight and bulk of the box increases making it difficult to fit in the congested nacelle
Solution Approach 1:
The H2 box is designed to be nested within the nacelle structure, utilizing the available internal space efficiently. The box fits into a dedicated compartment within the nacelle, maximizing space utilization while maintaining all necessary equipment for hydrogen transport.
Solution Approach 2:
The H2 box is divided into multiple compartments and sections, each housing specific equipment. This segmentation allows for optimized space utilization, easier installation, and maintained equipment completeness without excessive overall bulk.
2Quantity of substance
If the H2 box is designed to contain all necessary equipment for hydrogen transport, then the equipment completeness is improved, but the weight of the box increases making it difficult to handle and install
Solution Approach 1:
The installation system uses movable guide rollers and removable rails that can be dynamically positioned and removed after installation. This dynamic approach allows heavy H2 boxes to be installed temporarily with assistance from the removable support structure, then the support is removed leaving only the essential heavy component.
Solution Approach 2:
Removable rails and guide rollers serve as intermediary elements during installation. These temporary support structures facilitate the installation of heavy H2 boxes by providing guidance and support during positioning, then are removed after installation, leaving no permanent additional weight.
3Ease of operation
If rails are added to facilitate H2 box installation, then the ease of installation is improved, but the device complexity increases
Solution Approach 1:
The rails and guide rollers are designed as temporary installation aids that are discarded after use. They are removed following H2 box installation, meaning the complexity is only present during installation, not during operation. This resolves the contradiction by making the complexity temporary rather than permanent.
Solution Approach 2:
The mounting rails and guide rollers are designed as simple, inexpensive, temporary components that facilitate installation but are not intended for long-term use. Their simplicity and disposability reduce the overall device complexity while maintaining ease of installation.
4Weight of moving object
If the nacelle structure is maintained as is, then the aircraft weight is minimized, but the space available for installing the H2 box is insufficient
Solution Approach 1:
The H2 box is pre-assembled complete with all equipment outside the nacelle, then installed as a single unit into the pre-prepared space within the nacelle. This preliminary assembly allows the box to be optimized for compactness while ensuring it fits the available space without requiring additional nacelle modifications.
Data Source
AI summary
a method for mounting, in a nacelle for a hydrogen-powered aircraft, a box containing at least part of the equipment necessary for transporting dihydrogen to an engine of the aircraft, called H2 box, the mounting method comprising a step of positioning the H2 box in the nacelle by virtue of at least one rail secured to a chassis of the nacelle, or to the H2 box, or both.