Fuel Cell Power Pack Layout for Safer Rail Vehicle Fuel Storage
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Solution Overview
Problem
Rail vehicles with fuel cell drives face challenges due to complex and expensive fuel line transitions, safety risks from high-pressure flammable fuels, limited roof space for fuel tanks, and unfavorable collision behavior, which compromise safety and design simplicity.
Innovation Solution
A rail vehicle design featuring a power pack with integrated fuel cells and fuel tanks mounted on bogies, eliminating the need for fuel lines between cars, allowing for modular and adjustable fuel cell and tank configurations, and separating fuel storage from passenger areas for enhanced safety and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fuel tanks are distributed throughout the rail vehicle, then fuel supply to multiple cars is enabled, but the transitions become complex and expensive to construct and maintain
Solution Approach 1:
The invention extracts the fuel storage function from the distributed carriage structure and concentrates it in a single power pack. By removing fuel tanks from individual carriages and placing them centrally in the power pack, the complex fuel-carrying transitions between carriages are eliminated, while fuel supply capability is maintained through direct connection to the fuel cell in the power pack.
Solution Approach 2:
The invention merges the fuel tank and fuel cell into a single integrated power pack unit. This consolidation combines previously separate components (fuel storage and power generation) into one modular unit that can be easily installed and maintained, reducing overall system complexity while maintaining full fuel supply capability.
2Volume of moving object
If fuel tanks are located on the roof of the rail vehicle, then space inside the vehicle is freed up, but the amount of fuel that can be carried is limited due to weight and space constraints
Solution Approach 1:
The invention changes the spatial arrangement by placing the power pack containing fuel tanks at the end of the rail vehicle rather than on the roof or distributed throughout. This utilizes the longitudinal dimension and end-space of the vehicle, freeing up both roof space and internal passenger space while accommodating larger fuel tank capacity in the dedicated power pack area.
3Quantity of substance
If fuel tanks and pantograph are installed on the roof of a bimodal rail vehicle, then fuel storage is enabled, but the structure becomes extremely complex or impossible to implement
Solution Approach 1:
The invention extracts the fuel storage function from the roof area and relocates it to the power pack at the end of the vehicle. This removal of fuel tanks from the roof eliminates the need for complex structural integration between fuel tanks, pantograph, and overhead line equipment, greatly simplifying the vehicle structure while maintaining full fuel storage capability.
4Productivity
If fuel lines are extended between individual carriages, then fuel can be supplied to distributed fuel cells, but safety risks increase due to high-pressure flammable fuel in long lines
Solution Approach 1:
The invention extracts the fuel storage and power generation functions into a single centralized power pack, eliminating the need for long fuel lines between carriages. By concentrating fuel tanks and fuel cells together in one location, the fuel line length is minimized to only what is necessary within the power pack itself, dramatically reducing safety risks associated with high-pressure flammable fuel in extended piping.
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 design improves safety by minimizing fuel line risks, simplifies maintenance, enhances collision resilience, and allows for flexible power and fuel capacity scaling, ensuring high safety and efficient operation while maintaining passenger comfort and space utilization.
Implementation Method 1
The power pack has at least one fuel cell and at least one fuel tank with a fuel tank valve
Data Source
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AI summary
The invention relates to a rail vehicle (1) comprising a first passenger car and a power pack (2) with a fuel cell (20) and a fuel tank (21). The power pack (2) and the passenger car are coupled together. The power pack (2) is mounted on at least one bogie. The power pack (2) does not include any passenger seats. The rail vehicle (1) comprises at least one powered bogie, which can be supplied with electrical energy from the fuel cell.