Fuel Cell Anode Pressure Sensing Under Sensor Abnormalities
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel cell systems face operation stoppages due to pressure sensor abnormalities, leading to undesired power generation interruptions.
Innovation Solution
A fuel cell system with multiple pressure detectors and a control device that estimates a normal pressure detector based on supply and consumption situations, allowing continuous power generation by determining the pressure detector closest to the estimated value even when one detector becomes abnormal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pressure detectors are used to monitor fuel gas pressure, then measurement reliability is improved, but device complexity increases
Solution Approach 1:
The control device continuously monitors pressure detector readings and compares them against expected pressure ranges. When an abnormal reading is detected, the system automatically initiates a determination process to identify faulty detectors, creating a closed-loop feedback system that maintains reliability without requiring manual intervention or system shutdown.
Solution Approach 2:
The system performs self-diagnosis by automatically determining which pressure detectors are abnormal based on their readings. The control device uses the pressure detector determination process to identify and isolate faulty sensors, allowing the system to self-correct and continue operation without external assistance or operational disruption.
2Reliability
If pressure detectors are monitored for abnormalities, then operational safety is improved, but operation stoppage risk increases
Solution Approach 1:
Instead of shutting down the entire system when any pressure detector shows abnormality, the system applies partial action by isolating only the specific faulty detector(s). The determination process identifies which detectors are abnormal, allowing the system to continue operating with reduced monitoring capacity rather than complete shutdown, thus maintaining productivity while ensuring safety.
Solution Approach 2:
The system prepares for potential failures by having the pressure detector determination process ready to identify and isolate faulty detectors before they cause critical failures. This preemptive approach allows the system to maintain operational safety margins while avoiding unnecessary shutdowns, cushioning against the risk of operation stoppage.
3Object-affected harmful factors
If pressure detector abnormalities trigger system shutdown, then harmful effects are prevented, but energy efficiency deteriorates
Solution Approach 1:
The system extracts and isolates only the abnormal pressure detector(s) from the monitoring system rather than shutting down the entire fuel cell system. By removing only the faulty sensing elements and continuing operation with remaining functional detectors, the system prevents harmful effects of undetected pressure anomalies while avoiding the energy loss associated with complete system shutdown.
Solution Approach 2:
The abnormal pressure detector readings, which initially appear harmful, are converted into beneficial diagnostic information. The determination process uses these abnormal readings to identify and isolate faulty detectors, transforming a potential system failure into an opportunity for self-diagnosis and continued operation, thereby converting harm into benefit by maintaining energy efficiency.
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
Enables continuous power generation by accurately identifying a normal pressure detector, enhancing energy efficiency and preventing unnecessary system shutdowns.
Implementation Method 1
a fuel cell stack configured to generate electric power by an electrochemical reaction between an oxygen-containing gas and a fuel gas
Implementation Method 2
a pressure regulator configured to regulate pressure of the fuel gas discharged from the high pressure container
Data Source
AI summary
If a difference between pressure values detected by a plurality of pressure detectors is equal to or greater than a predetermined value, a anode pressure in the fuel gas supply pipe is estimated based on a supply situation of the fuel gas supplied from a pressure regulator and a consumption situation of the fuel gas in a fuel cell stack, and it is determined that a pressure detector detecting a pressure value closer to an estimated pressure value is a normal pressure detector. Thereafter, a power generation operation of a fuel cell system is continued based on the pressure value of the pressure detector determined to be normal.