Fuel Cell Separator Plate Intermediate Gas Injection
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Solution Overview
Problem
The production of water in ion exchange membrane fuel cells disrupts the flow of reactant gases, leading to clogging and diminished performance.
Innovation Solution
A separator plate with grooves featuring an inlet section, an outlet section, and injection means to inject reactant gas into an intermediate section, ensuring consistent gas distribution and preventing moisture buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reactant gas flows through grooves to supply the membrane electrode assembly, then gas distribution is achieved, but water production disrupts the flow and creates clogging
Solution Approach 1:
The groove is segmented into multiple sections with intermediate injection points. Reactant gas is injected at multiple locations along the groove rather than a single inlet, dividing the flow path into segments that prevent water accumulation and maintain continuous gas supply to the membrane electrode assembly.
Solution Approach 2:
Reactant gas is injected into intermediate sections of the groove before water can accumulate and cause clogging. This preliminary injection of fresh gas prevents the harmful effect of water disruption by maintaining flow continuity throughout the groove length.
2Productivity
If fuel is supplied to the anode grooves, then hydrogen is provided for the reaction, but water produced disrupts the flow and diminishes performance
Solution Approach 1:
Different sections of the groove receive reactant gas at different times and locations. The intermediate injection means provide fresh hydrogen locally along the groove path, ensuring each section maintains adequate reactant concentration for the electrochemical reaction, thereby sustaining overall fuel cell productivity.
Solution Approach 2:
The multi-point injection system ensures continuous supply of reactant gas throughout the groove length. By injecting gas at intermediate sections, the system maintains uninterrupted flow and continuous electrochemical reaction, preventing performance diminution caused by flow disruption or clogging.
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
Enhances reactant gas distribution, reduces the risk of water clogging, and improves fuel cell performance by maintaining gas flow and replenishing consumed reactant gases.
Implementation Method 1
injection means configured so as to inject gas into at least one intermediate section of the groove situated between the inlet section and the outlet section
Implementation Method 2
The ion exchange membrane is thus a proton exchange membrane. When in operation, the grooves of the anode side separator plate are supplied with hydrogen and the grooves of the cathode side separator plate are supplied with air or oxygen. The hydrogen produces protons which pass through the membrane
Data Source
AI summary
A fuel cell separator plate is provided. The fuel cell separator plate includes at least one groove formed in a face of the separator plate so as to feed reactant gas to a membrane electrode assembly applied against the face of the separator plate, the groove comprising an inlet section and an outlet section. The fuel cell separator plate also includes injection means configured so as to inject gas into at least one intermediate section of the groove, situated between the inlet section and the outlet section.