Hydrogen System Valve Segmentation for Rapid Leakage Discharge
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Solution Overview
Problem
Existing hydrogen systems face challenges in quickly and effectively discharging hydrogen-containing gas from the interior to the outside of the housing in response to leakage, leading to prolonged waiting times for maintenance and increased risk of ignition due to the wider flammable range of hydrogen compared to fossil fuels.
Innovation Solution
A hydrogen system comprising a generator, storage, and valves with a controller that manages the discharge of hydrogen-containing gas through multiple gas passages and valves, allowing for prioritized discharge from either the generator or storage, or both, based on leakage detection, thereby reducing the risk of ignition and facilitating quicker maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single ventilation port is provided in the hydrogen storage tank, then the structure is simple, but the discharge efficiency of hydrogen-containing gas is insufficient
Solution Approach 1:
The gas discharge system is segmented into multiple independent pathways: a first gas passage with a first valve for discharging from the storage tank, and a second gas passage with a second valve for discharging from the generator. This segmentation allows simultaneous or selective discharge through different routes, significantly improving discharge efficiency while maintaining structural simplicity through modular design
2Reliability
If hydrogen discharge is delayed, then the system operates normally, but the risk of hydrogen ignition increases due to the wider flammable range
Solution Approach 1:
The system performs preliminary discharge actions by providing dedicated gas passages and valves that can be activated immediately upon detecting hydrogen accumulation. The first valve and second valve are pre-configured to enable rapid discharge before ignition risk becomes critical, addressing the harmful effect proactively rather than reactively
Solution Approach 2:
The controller monitors hydrogen-containing gas levels and provides feedback control by selectively opening the first valve, second valve, or both based on real-time conditions. This feedback mechanism ensures timely discharge to maintain safe operation while minimizing ignition risk associated with delayed response
3Object-affected harmful factors
If multiple gas passages and valves are added to improve discharge capability, then the ignition risk is reduced, but the device complexity increases
Solution Approach 1:
The system segments the discharge function into two independent gas passages with各自的 valves, allowing targeted discharge from different sources (storage tank and generator). This segmentation improves ignition risk mitigation while keeping each segment relatively simple and modular
Solution Approach 2:
The controller provides universal control by managing multiple valves and gas passages through a single control system. This multi-functionality allows the system to handle various discharge scenarios (tank-only, generator-only, or simultaneous discharge) without requiring separate control mechanisms for each case, thereby limiting the increase in overall system complexity
Data Source
AI summary
A hydrogen system includes: a generator which generates hydrogen-containing gas; a storage which stores the hydrogen-containing gas generated by the generator; a first gas passage which connects the generator and the storage; a housing which houses the generator, the storage and the first gas passage; a second gas passage in which the hydrogen-containing gas discharged from the first gas passage to an outside of the housing flows; a first valve provided to the second gas passage; a third gas passage in which the hydrogen-containing gas discharged from the storage to the outside of the housing flows; a second valve provided to the third gas passage; and a controller which opens at least one of the first valve and the second valve.