Fuel Cell Ship Leak Isolation With Compartment Shutoff Valves
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Solution Overview
Problem
In a fuel cell ship, an unlikely event of a fuel gas leak in the tank or fuel cell compartment poses a hazardous state, necessitating measures to stop electric power generation.
Innovation Solution
The fuel cell ship is equipped with two or more shutoff valves in each of the tank and fuel cell compartments, along with fuel gas detectors, and a control unit that closes these valves if the detected fuel gas concentration exceeds a predetermined standard, thereby stopping electric power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel cell and fuel tank are installed in independent compartments, then safety is improved by isolating combustible materials, but device complexity increases due to additional compartmentalization and safety systems
Solution Approach 1:
The ship is divided into independent tank compartment and fuel cell compartment to isolate combustible fuel from the fuel cell, reducing safety risks while maintaining operational functionality through spatial separation
2Reliability
If shutoff valves and fuel gas detectors are installed in both compartments, then safety is improved by enabling rapid response to fuel leaks, but device complexity increases due to additional components and control systems
Solution Approach 1:
Shutoff valves are pre-installed in both the tank compartment and fuel cell compartment, and fuel gas detectors are positioned to monitor for leaks, enabling immediate automated response without requiring complex real-time decision algorithms
Solution Approach 2:
Fuel gas detectors continuously monitor the compartments and provide feedback to the control unit, which automatically activates shutoff valves when fuel gas concentration exceeds the predetermined standard, creating a simple yet effective closed-loop safety system
3Reliability
If the control unit automatically closes shutoff valves upon detecting fuel gas concentration above standard, then safety is improved by stopping electric power generation promptly, but device complexity increases due to automated control mechanisms
Solution Approach 1:
The control unit is programmed with a predetermined standard for fuel gas concentration and automatically compares detector readings against this threshold, closing shutoff valves without requiring external intervention or complex adaptive algorithms, thereby achieving prompt safety response with minimal control complexity
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 configuration effectively prevents the continuation of electric power generation in the event of a fuel gas leak, reducing the risk of explosion and ensuring safety.
Implementation Method 1
a fuel cell that generates electric power by an electrochemical reaction of fuel
Implementation Method 2
fuel gas detectors that detect a fuel gas being in a gaseous state of the fuel
Data Source
AI summary
A fuel cell ship includes a fuel cell compartment in which a fuel cell is installed, a tank compartment in which a fuel tank is installed, a fuel supply pipe through which fuel is supplied from the fuel tank to the fuel cell, and a control unit. The fuel supply pipe includes at least two shutoff valves. Fuel gas detectors that detect a fuel gas being in a gaseous state of the fuel are each installed in the compartments. If at least one of the fuel gas detectors detects that a concentration of the fuel gas is equal to or greater than a predetermined standard value, the control unit controls to close a shutoff valve in a compartment out of the tank compartment and the fuel cell compartment, where the fuel gas detector having detected the concentration equal to or greater than the standard value is installed.