Fuel Cell Stack Fluid Tube Heat Insulation
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Solution Overview
Problem
Conventional fuel cell stacks inefficiently collect thermal energy generated during power generation due to direct heat transfer from fluid tube bodies to end plates, which are then discharged outside.
Innovation Solution
A fuel cell stack design featuring a gap between the fluid tube body and end plate, with the fluid tube body having convex and concave portions that create a heat-insulating air gap, reducing heat transfer to the end plate and allowing efficient thermal energy collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the fluid tube body is made of material with low thermal conductivity, then heat transfer to end plate is reduced, but the structural strength and durability of the fluid tube body may be compromised
Solution Approach 1:
The fluid tube body is constructed using composite materials that combine low thermal conductivity with high structural strength, allowing simultaneous achievement of thermal insulation and mechanical durability
Solution Approach 2:
A heat-insulating air gap is introduced as an intermediary between the fluid tube body and end plate, reducing direct thermal contact while maintaining structural integrity through the gap design
2Loss of energy
If a gap is formed between fluid tube body and end plate, then heat transfer is reduced, but the sealing performance and structural stability may deteriorate
Solution Approach 1:
A heat-insulating member is introduced as an intermediary element between the fluid tube body and end plate, providing both thermal insulation and sealing functionality while maintaining structural stability
Solution Approach 2:
Flexible sealing elements are used to create reliable seals across the gap between the fluid tube body and end plate, accommodating thermal expansion and contraction while maintaining sealing performance
3Loss of energy
If the fluid tube body is detached from the end plate, then heat transfer is reduced, but the ease of assembly and disassembly is improved, but manufacturing precision and alignment may be affected
Solution Approach 1:
The heat-insulating member serves as a precision positioning intermediary that ensures accurate alignment between the fluid tube body and end plate during assembly, maintaining manufacturing precision while enabling detachable connection
Solution Approach 2:
Traditional direct mechanical coupling is replaced with a heat-insulating member-based connection system that provides both thermal insulation and precise positioning capabilities
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
The design effectively reduces heat transfer from the fluid tube body to the end plate, enabling efficient collection and retention of thermal energy generated during power generation.
Implementation Method 1
a part of the outer surface of the fluid tube body opposite to the inner surface of the through-hole is separated from the inner surface of the through-hole... creating a heat-insulating air gap, reducing heat transfer to the end plate
Data Source
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AI summary
A fuel cell stack comprising: a cell stack body having stacked single cells and a manifold for supplying or discharging a fluid to the stacked single cells, the single cell including a membrane electrode assembly and a separator sandwiching the membrane electrode assembly; an end plate stacked onto the cell stack body and having a through-hole along the stacking direction of the cell stack body; and a fluid tube body inserted detachably into the through-hole so as to pass through the end plate, the fluid tube body being connected to the manifold, wherein a part of the outer surface of the fluid tube body opposite to the inner surface of the through-hole is separated from the inner surface of the through-hole.