Fuel Cell Module Ventilation Layout for Leak-Risk Zones
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Solution Overview
Problem
In fuel cell systems, particularly on ships, the existing ventilation configurations for multiple fuel cell modules are insufficient, leading to localized high fuel gas concentrations, which poses safety risks and requires more stringent ventilation to comply with safety regulations, making it challenging to install non-explosion-proof modules in designated safety zones.
Innovation Solution
A fuel cell system design that includes a ventilation flow generator specifically targeting the fuel gas leakage risk portions, such as hydrogen supply pipes and pumps, to dissipate leaked fuel gas, thereby reducing the likelihood of high fuel gas concentrations and allowing for non-explosion-proof module installation in safer zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple fuel cell modules are ventilated by one ventilation device, then device complexity is reduced, but ventilation effectiveness deteriorates leading to localized high fuel gas concentration
Solution Approach 1:
The patent divides the ventilation system into multiple independent ventilation devices, each responsible for a specific section. This segmentation ensures that each section receives adequate ventilation independently, preventing localized fuel gas accumulation while maintaining manageable system complexity through modular design.
Solution Approach 2:
The patent implements section-specific ventilation by positioning ventilation devices to target specific fuel cell modules or sections. This local quality approach ensures that ventilation is applied where needed most, effectively dispersing fuel gas at the source rather than relying on a single general ventilation system.
2Ease of manufacture
If non-explosion-proof electrical equipment is installed in safety zone, then ease of manufacture is improved, but safety requirements become more stringent
Solution Approach 1:
The patent applies preliminary anti-action by implementing a ventilation system that proactively prevents fuel gas accumulation before it reaches explosive concentrations. This allows non-explosion-proof equipment to be installed in safety zones while maintaining safety through preventive ventilation that counteracts potential fuel gas leakage.
Solution Approach 2:
The patent converts the potential harm of fuel gas leakage into a benefit by using the ventilation system to actively manage and disperse any leaked fuel gas. This approach transforms the risk associated with installing non-explosion-proof equipment into an opportunity to demonstrate effective fuel gas management through controlled ventilation.
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 solution effectively achieves a high degree of ventilation within the fuel cell system, reducing the risk of fuel gas accumulation and enabling compliance with safety regulations, allowing for the use of non-explosion-proof modules in safer zones.
Implementation Method 1
a ventilation flow generator configured to generate a ventilation flow directed toward the fuel gas leakage risk portion
Data Source
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AI summary
A fuel cell system includes a fuel cell module having a fuel cell stack, a fuel gas system that supplies a fuel gas to the fuel cell stack, and a ventilation flow generator. The fuel gas system includes a fuel gas leakage risk portion. The ventilation flow generator generates a ventilation flow directed to the fuel gas leakage risk portion.