Heat Exchanger Fin Structure With High-Emissivity Plate Inserts
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Solution Overview
Problem
There is a limitation in improving heat exchange efficiency in heat exchangers due to restrictions on the materials that can be used for integrally molding partition walls and fins.
Innovation Solution
A heat exchanger design featuring a partition wall with a cylindrical side circumferential portion and a bottom portion, with fins integrally molded from the same material as the partition wall, and plate-shaped members made of a higher emissivity or heat resistance material than the fins, positioned between the fins and fixed to the bottom portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fins and partition walls are integrally molded to improve heat exchange efficiency, then heat transfer area increases, but material selection is limited
Solution Approach 1:
The heat exchanger is divided into multiple components: partition walls and fins are integrally molded as one unit, while plate-shaped members are separate components that are coupled to the fins. This segmentation allows different materials to be used for different components, resolving the material selection limitation while maintaining integral molding benefits for the fin-partition wall assembly.
Solution Approach 2:
The invention uses composite material construction where the partition wall and fins are made of one material (e.g., aluminum alloy for corrosion resistance), and plate-shaped members are made of a different material (e.g., stainless steel for high temperature resistance). This allows each component to be optimized for its specific functional requirements without compromising the integral molding advantage.
2Reliability
If high emissivity material is used for plate-shaped members, then heat radiation improves, but manufacturing complexity increases
Solution Approach 1:
The plate-shaped members are prepared in advance with high emissivity material properties before being coupled to the fins. This preliminary preparation allows the heat radiation optimization to be achieved without adding complex manufacturing steps during the main assembly process, as the high emissivity components are ready-made units.
Solution Approach 2:
High emissivity material is applied locally only to the plate-shaped members where heat radiation is most beneficial, rather than the entire heat exchanger. This localized approach improves heat radiation efficiency where needed while keeping the overall manufacturing process relatively simple and avoiding unnecessary complexity in other 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 design enhances heat radiation and improves heat exchange efficiency even when there are material limitations for integrally molding the partition walls and fins, by utilizing the higher emissivity or heat resistance of the plate-shaped members.
Implementation Method 1
the plate-shaped members are formed of a different material of higher emissivity or heat resistance than the material of the fins
Data Source
AI summary
A heat exchanger includes a partition wall that separates two fluids having different temperatures. The partition wall includes a side circumferential portion, and a bottom portion configured to close an opening on one side of the side circumferential portion. Fins are formed on an outer surface of the partition wall, and arranged side by side in a circumferential direction around a center of a cylinder of the side circumferential portion. Each of the fins includes a base portion connected to an outer surface of the bottom portion. Plate-shaped members are provided between the base portions of the fins adjacent in the circumferential direction, and fixed to the outer surface of the bottom portion. The partition wall and the plurality of fins are integrally molded of a same material. The plate-shaped members are formed of a different material of higher emissivity or heat resistance than the material of the fins.