Integrated Membrane Humidifier for Fuel Cell Cooling and Humidification
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Solution Overview
Problem
Current fuel cell systems require separate components for humidification and cooling, leading to increased size, complexity, and pressure loss, which hinders miniaturization and simplification.
Innovation Solution
A fuel cell system with a single membrane humidifier that integrates humidification through moisture exchange and cooling through heat exchange in a single housing unit, utilizing hollow fiber membranes for moisture exchange and a heat exchange module, with a channel valve to distribute the air flow between the two processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate heat exchanger and membrane humidifier are used for cooling and humidification, then effective cooling and humidification are achieved, but device complexity and size increase
Solution Approach 1:
The patent combines the heat exchanger and membrane humidifier into a single integrated unit where the first fluid (air) passes through both cooling and humidification stages sequentially within one device. The housing contains both the heat exchange module with coolant channels and the membrane humidification module with hollow fiber membranes, eliminating the need for separate components while maintaining both cooling and humidification functions.
2Reliability
If separate heat exchanger and membrane humidifier are used, then adequate cooling and humidification are achieved, but the system size increases
Solution Approach 1:
The heat exchanger and membrane humidifier are merged into a single integrated device with a unified housing structure. The air flow path is designed to sequentially pass through the heat exchange module and then the membrane humidification module within the same device boundaries, significantly reducing the total volume compared to having two separate components.
Solution Approach 2:
The membrane humidification module is nested within the housing unit that also contains the heat exchange module. The hollow fiber membranes are arranged in a compact configuration within the available space, allowing the humidification function to be embedded within the overall device structure rather than adding external volume.
3Reliability
If separate heat exchanger and membrane humidifier are used, then cooling and humidification functions are achieved, but pressure loss increases
Solution Approach 1:
By integrating the heat exchanger and membrane humidifier into a single device with a continuous air flow path, the patent eliminates the pressure loss that would occur from having separate components with multiple connections and transitions. The air flows smoothly from the heat exchange module directly into the membrane humidification module without interruption or additional resistance.
4Reliability
If multiple separate components are used for humidification and cooling, then effective moisture control and temperature regulation are achieved, but ease of manufacture decreases
Solution Approach 1:
The patent integrates multiple functions into a single manufacturable unit with a unified housing structure. The assembly process is simplified as the heat exchange module and membrane humidification module are designed to be assembled together as one device, reducing the number of separate manufacturing steps, quality checks, and installation procedures required compared to producing and assembling multiple separate components.
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 integration simplifies and miniaturizes the fuel cell system, reducing size and pressure loss while maintaining effective humidification and cooling, thereby enhancing the system's efficiency and compactness.
Implementation Method 1
a membrane humidification method of supplying moisture to a gas fluid bed using a polymer separation membrane
Implementation Method 2
humidify the first fluid using moisture exchange between the first and second fluids, the moisture exchange being performed through the plurality of hollow fiber membranes
Implementation Method 3
the first fluid is cooled by performing heat exchange with a coolant in a heat exchange module
Implementation Method 4
A fuel cell is a power generation cell that combines hydrogen and oxygen to generate electricity
Data Source
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AI summary
The present invention relates to a membrane humidifier for a fuel cell capable of simplifying a fuel cell system and miniaturizing the fuel cell system by performing humidification by moisture exchange and cooling by heat exchange in one membrane humidifier, and a fuel cell system comprising same. The membrane humidifier for a fuel cell of the present invention comprises both a humidification module and a heat exchange module in a housing part, and distributes a first fluid to the humidification module and the heat exchange module at a variable distribution ratio.