Rotated Wire Mesh Porous Laminate for Low Pressure Loss Heat Transfer
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Solution Overview
Problem
Existing heat exchangers using wire mesh laminated porous materials face issues with fluctuating thermal performance due to position deviations during lamination, increased manufacturing complexity, and high pressure loss, despite efforts to improve heat transfer and flow-straightening capabilities.
Innovation Solution
The wire meshes are laminated with identical aperture diameters and line diameters, rotated relative to each other, and set with aperture openings between 0.5 mm and 0.7 mm, and an interval of 0.5 mm to 0.6 mm between adjacent meshes in the lamination direction, ensuring a stable heat transfer rate and low pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If wire meshes are laminated with gaps to reduce pressure loss, then pressure loss decreases, but heat transfer capability deteriorates
Solution Approach 1:
The patent optimizes the aperture opening length parameter to 0.5-0.7mm and the lamination interval to 0.5-0.6mm, finding the optimal balance between pressure loss reduction and heat transfer maintenance. This parameter optimization allows the wire mesh structure to provide flow straightening and heat transfer surfaces while minimizing pressure loss.
Solution Approach 2:
The patent introduces relative rotation between adjacent wire meshes, creating a dynamic angular relationship that optimizes fluid flow patterns. This rotational arrangement enhances flow straightening effects while maintaining adequate contact between fluid and wire mesh surfaces for heat transfer.
2Ease of manufacture
If wire meshes are laminated without specified arrangement to simplify manufacturing, then manufacturing complexity decreases, but thermal performance fluctuates due to position deviation
Solution Approach 1:
The patent specifies the aperture opening length within 0.5-0.7mm and lamination interval within 0.5-0.6mm, providing controlled parameter ranges that ensure consistent thermal performance while remaining manufacturable. These parameter specifications prevent excessive position deviation without requiring ultra-precise manufacturing.
Solution Approach 2:
The patent introduces relative rotation between adjacent wire meshes, creating an asymmetric angular arrangement that is less sensitive to manufacturing variations. This rotational asymmetry ensures that even with position deviations, the overall flow straightening and heat transfer performance remains stable.
3Temperature
If wire meshes with different mesh sizes or material types are laminated to improve performance, then heat transfer capability improves, but manufacturing complexity and costs increase
Solution Approach 1:
The patent uses wire meshes with identical aperture sizes and line diameters throughout the lamination, creating a homogeneous structure. This uniformity simplifies manufacturing and quality control while the optimized parameters (0.5-0.7mm aperture, 0.5-0.6mm interval) and relative rotation provide sufficient heat transfer and flow straightening performance without requiring varied materials or mesh sizes.
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 configuration maintains consistent thermal performance by minimizing changes in pressure loss and heat transfer rate, facilitating easy manufacturing and reducing size and weight, while enhancing flow-straightening effects.
Implementation Method 1
heat transfer rate
Implementation Method 2
pressure loss
Data Source
Figure 1A
Figure 2A~2B
Figure 3~4
AI summary
There are provided a wire mesh laminated porous material and pipes containing a porous material, in which wire meshes (21) are provided, wire meshes (21) an interval in between, each of apertures and line diameters of the wire meshes being identical therebetween, adjacent to each other in a lamination direction are relatively rotated and laminated, and opening lengths of the apertures of the wire meshes (21) being set in a range of 0.5 mm or more and 0.7 mm or less.