Fuel Cell Stack Air Cleaning via Centrifugal Gas-Liquid Separation
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Solution Overview
Problem
Fuel cell systems face performance degradation and reduced lifetime due to the supply of foreign substances, primarily metal pieces from air compressors, which contaminate the stack during oxygen supply.
Innovation Solution
A fuel cell system incorporating a gas-liquid separator between the air supply unit and the stack to remove foreign substances from the air using a centrifugal mechanism, ensuring clean air is supplied to the stack, and a filtering unit to capture any remaining impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air compressor is used to supply oxygen to the stack, then oxygen supply capability is improved, but foreign substances (metal pieces) are generated and supplied to the stack
Solution Approach 1:
A gas-liquid separator is introduced as an intermediary component between the air compressor and the fuel cell stack. The separator removes foreign substances (metal pieces) from the compressed air through centrifugal separation, allowing the air compressor to maintain high productivity while preventing harmful contaminants from reaching the stack.
Solution Approach 2:
The harmful foreign substances are extracted and removed from the compressed air stream using the gas-liquid separator. The separator extracts metal pieces and other contaminants from the air flow before it enters the fuel cell stack, maintaining oxygen supply capability while eliminating harmful factors.
2Productivity
If foreign substances are supplied to the stack, then air supply function is maintained, but stack performance and lifetime are degraded
Solution Approach 1:
The gas-liquid separator serves as a protective intermediary that maintains the air supply function while filtering out foreign substances. It allows continuous operation of the air compressor without compromising stack reliability, as the separator blocks metal pieces and contaminants from entering the stack.
Solution Approach 2:
The gas-liquid separator performs preliminary cleaning of the compressed air before it reaches the fuel cell stack. By removing foreign substances in advance, the system maintains air supply function while preventing performance degradation and extending stack lifetime.
3Object-affected harmful factors
If gas-liquid separator is installed in the air supply flow path, then foreign substances are removed from air, but device complexity increases
Solution Approach 1:
A gas-liquid separator is introduced as an intermediary component between the air compressor and the fuel cell stack. The separator removes foreign substances (metal pieces) from the compressed air through centrifugal separation, allowing the air compressor to maintain high productivity while preventing harmful contaminants from reaching the stack.
Solution Approach 2:
The patent replaces complex filtration systems with a simpler centrifugal separation mechanism. The gas-liquid separator uses rotational centrifugal force to separate foreign substances from air, eliminating the need for complex mechanical filters while achieving effective contaminant removal.
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
Prevents foreign substances from reaching the stack, thereby enhancing the performance and extending the lifetime of the fuel cell system by ensuring clean air is consistently supplied.
Implementation Method 1
an air rotation portion disposed in the air inlet and configured to rotate air supplied through the air inlet
Data Source
AI summary
Disclosed is a fuel cell system. The fuel cell system of the present invention is characterized by a gas-liquid separator for removing foreign substances in air between a stack and an air supply unit. So the present invention can therefore prevent the foreign substances from being supplied to the stack and improve the function and extend the lifetime of the stack.