Hydrogen Tank Piping Pressure Check for Filling-Side Leak Detection
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Solution Overview
Problem
In hydrogen tank systems where the hydrogen filling pipe and supply pipe are common, there is a risk of hydrogen leakage from the filling port if the check valve fails, leading to potential safety and efficiency issues.
Innovation Solution
A hydrogen tank system with a control device that monitors the internal pressure of the common piping before hydrogen supply to the consuming apparatus, and notifies when the pressure drops below a predetermined level, allowing for quick response to potential leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hydrogen filling pipe and supply pipe are common, then the system complexity is reduced and the route is simplified, but the risk of hydrogen leakage increases when the check valve fails
Solution Approach 1:
The control device performs preliminary detection of the common piping's internal pressure before hydrogen supply begins. By measuring pressure at the start of supply and comparing it to a predetermined threshold, the system proactively identifies potential leakage issues before they escalate, resolving the contradiction by maintaining simple piping while adding preventive detection capability
Solution Approach 2:
The system establishes a feedback loop where the control device continuously monitors pressure in the common piping and compares it against threshold values. When pressure drops below the threshold, the system generates a leak warning signal, creating closed-loop feedback that enables real-time detection and response to leakage conditions without complicating the physical piping structure
2Measurement precision
If pressure monitoring is implemented in the common piping, then leakage detection capability is improved, but the device complexity increases
Solution Approach 1:
The control device leverages the existing pressure sensor already present in the hydrogen tank system for filling control purposes. By repurposing this existing sensor to also perform leakage detection in the common piping, the system achieves improved measurement capability without adding dedicated leakage detection hardware, thus avoiding increased device complexity
Solution Approach 2:
The existing pressure sensing infrastructure serves dual purposes: both controlling hydrogen filling operations and detecting potential leaks in the common piping. This self-service approach allows the system to gain enhanced leakage detection capability while utilizing already-deployed components, preventing additional complexity
Data Source
AI summary
In a system where the hydrogen filling piping and the hydrogen supply piping are common, it is possible to promptly respond even when a problem occurs in the hydrogen filling side. Hydrogen tank, a hydrogen consumption device, and a hydrogen tank system having a hydrogen filling port, at least a portion of the piping from the pipe and the hydrogen tank to the hydrogen consuming apparatus from the hydrogen filling port to the hydrogen tank is common, the control device, before the hydrogen supply to the hydrogen consuming apparatus after the hydrogen charging to the hydrogen tank, determines by acquiring the internal pressure of the pipe in the common portion of the pipe, performs control for notifying.