Cylindrical Fuel Cell Module Housing with Integrated Flow Passages
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Solution Overview
Problem
The existing fuel cell apparatus has a complex housing structure with numerous U-shaped plate members and joint portions, leading to high costs and difficulty in manufacturing.
Innovation Solution
A fuel cell module design featuring cylindrical members with reduced joint portions, where the first and second cover members are clinched to the cylindrical members over the entire circumference, and the power generation portion, exhaust combustion gas flow passage, and cathode gas flow passage are arranged from inner to outer sides for efficient heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the housing is constituted by U-shaped plate members and closing bodies, then the structural integrity is maintained, but the number of members and joint portions increases leading to higher costs and manufacturing difficulty
Solution Approach 1:
The patent combines multiple U-shaped plate members and closing bodies into a single integrated housing structure. The housing is formed as one piece with integrated side walls, bottom wall, and top surfaces, eliminating the need for separate members and multiple joint portions, thereby reducing manufacturing complexity and cost.
Solution Approach 2:
The housing is designed with integrated flow passages that are formed directly within the housing structure itself, rather than requiring separate flow passage components. This integration reduces the number of parts while maintaining the functional separation of different gas flow paths.
2Reliability
If multiple U-shaped plate members and closing bodies are used, then the housing can accommodate the power generation chamber, but the number of joint portions increases affecting costs and manufacturing
Solution Approach 1:
The housing is constructed as a single integrated structure where the side walls, bottom wall, and top surfaces are formed as one continuous piece. This eliminates multiple joint portions between separate members while maintaining the structural integrity and sealing capability required for housing the power generation chamber.
3Use of energy by moving object
If the cathode gas flow passage is preheated by exhaust combustion gas, then energy efficiency is improved, but the heat exchange efficiency depends on the arrangement of flow passages
Solution Approach 1:
The patent arranges the flow passages in a counterflow configuration where the cathode gas flows in the opposite direction to the exhaust combustion gas. This inversion of flow directions maximizes the temperature gradient along the heat exchange path, enabling efficient preheating of the cathode gas by the hot exhaust gas, thereby improving both energy efficiency and heat exchange productivity.
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 design reduces costs and enhances manufacturing ease while ensuring airtightness and efficient heat exchange, preheating the cathode gas with exhaust combustion gas.
Implementation Method 1
the cathode gas flowing through the cathode gas flow passage is preheated by the combustion gas flowing through the exhaust gas flow passage
Data Source
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AI summary
A fuel cell module (11) includes a power generation portion (40), a first cylindrical member (51, 151) arranged to surround the power generation portion and including a first peripheral side wall (51a) and first and second opening portions (51 b), a second cylindrical member (52) arranged to surround the first cylindrical member and including a second peripheral side wall (52a) and first and second opening portions (52b), a first cover member (53) being joined to at least one of the first opening portion (51b) of the first cylindrical member and the first opening portion (52b) of the second cylindrical member, a second cover member (54) being joined to at least one of the second opening portion (51 b) of the first cylindrical member and the second opening portion (52b) of the second cylindrical member, a first flow passage (60) and a second flow passage (70).