Fuel Cell Module Safety Casing With Inert Low-Pressure Atmosphere

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Solution Overview

Problem

Fuel cell modules, particularly those using hydrogen, face challenges in preventing the formation of explosive atmospheres due to leaks in confined spaces, which are not adequately addressed by existing ventilation methods, and require a safety system suitable for marine applications.

Innovation Solution

A pressure-tight safety casing with an integrated fluid management system, including a fuel supply, air supply, exhaust, and casing atmosphere system, maintains a below-ambient pressure and inert gas atmosphere to prevent explosive mixtures, equipped with sensors and valves for leak detection and control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the fuel cell module is placed in a confined space onboard a ship, then the system can be installed in marine applications, but hydrogen leaks may result in an explosive atmosphere inside the confined space

Engineering Contradiction:

Improvemarine application capabilityVSAvoidexplosive atmosphere formation

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies the inert atmosphere principle by introducing a fluid (typically inert gas like nitrogen) into the space between the fuel cell module and the safety casing. This fluid displaces oxygen and prevents the formation of explosive hydrogen-oxygen mixtures in case of hydrogen leaks, thereby enabling safe marine installation of fuel cell modules in confined spaces.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

2Object-affected harmful factors

If extensive forced ventilation systems are installed to prevent explosive atmospheres, then safety is improved, but the efficiency of the overall system is reduced

Engineering Contradiction:

Improveexplosive atmosphere preventionVSAvoidsystem efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

Instead of using extensive forced ventilation systems that reduce overall system efficiency, the patent employs an inert fluid atmosphere system that passively prevents explosive atmosphere formation. The fluid is introduced into the interstitial space and maintains a non-explosive environment without requiring complex ventilation infrastructure, thereby preserving system efficiency while ensuring safety.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

3Object-affected harmful factors

If the fuel cell module is arranged in a well-ventilated compartment with ambient air flow, then hydrogen leaks are diluted and explosive mixtures are prevented, but this approach is not suitable for confined marine spaces

Engineering Contradiction:

Improvehydrogen leak dilutionVSAvoidconfined space suitability

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent replaces the ambient air flow dilution method with an inert fluid atmosphere system specifically designed for confined spaces. The inert fluid is contained within the safety casing environment and actively prevents explosive mixture formation without requiring external ventilation, making the system adaptable to confined marine installations while maintaining effective leak prevention.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

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 system effectively prevents the formation of explosive atmospheres by maintaining a controlled inert environment, facilitates leak detection, and ensures safety in confined spaces, making fuel cell modules suitable for marine installations.

Implementation Method 1

The casing atmosphere system is arranged to maintain the fluid at a below ambient pressure inside the safety casing

Methodology Applied

Scientific EffectPressure control:

Implementation Method 2

means for evacuating the fluid from the safety casing through the outlet

Methodology Applied

Scientific EffectEvacuation:

Data Source

PatentUS20250329768A1Safety and support system for a fuel cell module

Publication Date: 2025.10.23 CORVUS ENERGY AS

AI summary

Described herein is a safety and support system for a fuel cell module comprising: a pressure-tight safety casing for enclosing the fuel cell module and for containing a fluid; a fuel supply system, arranged to transport fuel to the fuel cell module from an external source; an air supply system, arranged to transport air to the fuel cell module from an external source, an exhaust system, arranged to transport exhaust fluids from the fuel cell module out of the safety casing, and a casing atmosphere system comprising: an inlet into the safety casing having an inlet valve, an outlet from the safety casing having an outlet valve, means for evacuating the fluid from the safety casing through the outlet, and a pressure sensor, arranged for measuring a pressure of the fluid inside the safety casing, wherein the casing atmosphere system is arranged to maintain a below ambient pressure inside the safety casing. Also described herein is a method for preventing an explosive atmosphere inside a safety casing and a fuel cell system for marine applications.