Heat Exchanger Filtering Device for Catalyst Retention
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Solution Overview
Problem
Existing heat exchangers, particularly catalytic heat exchangers for hydrogen liquefaction, face complexities in catalyst distribution and retention, leading to increased catalyst usage, complex architecture, and difficulties in manufacturing and scaling due to the need for filtration cartridges and domes that limit the heat exchanger's width and require specific tooling.
Innovation Solution
A heat exchanger design featuring a filtering device made of metal sheet materials like metal fabric, sintered metal, or microperforated plates integrated between plates and closure bars, allowing for simpler catalyst retention and distribution, reduced catalyst usage, and simplified manifold design, enabling easier manufacturing and scaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filtration cartridges and domes are used to retain catalyst particles, then catalyst retention is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The invention extracts and eliminates the complex filtration cartridge and dome components from the system. Instead of using these separate retention mechanisms, the patent employs a simplified manifold structure with integrated particle retention capabilities, reducing the number of parts and manufacturing steps while maintaining catalyst retention function.
Solution Approach 2:
The manifold structure is designed to perform multiple functions simultaneously: fluid distribution, catalyst retention, and particle filtration. By making the manifold multi-functional, the patent eliminates the need for separate dedicated components for each function, thereby reducing overall device complexity.
2Reliability
If domes are used to cover inlet and outlet openings, then catalyst particle movement is limited, but heat exchanger width is limited and manufacturing difficulty increases
Solution Approach 1:
The invention removes the dome component entirely and replaces it with a manifold structure that achieves the same particle retention effect through alternative means, such as controlled opening geometries and internal flow patterns that prevent catalyst particle movement without requiring domes.
Solution Approach 2:
Instead of using domes that extend in the width direction to control particles, the patent uses vertical or longitudinal manifold structures that control particle movement through different spatial dimensions, allowing the heat exchanger to achieve the same function with greater width.
3Reliability
If manifolds are filled with catalyst to limit particle movement, then catalyst retention is improved, but catalyst usage quantity increases
Solution Approach 1:
The invention extracts the unnecessary catalyst filling from the manifold interiors. By using the simplified manifold structure with integrated retention features, the system maintains effective catalyst retention without requiring excessive catalyst volumes that would be needed to fill and seal manifold cavities.
Solution Approach 2:
Instead of uniformly filling entire manifold volumes with catalyst, the patent applies catalyst retention features locally at specific strategic points within the manifold structure where particle control is most needed, reducing overall catalyst quantity while maintaining retention effectiveness.
4Manufacturing precision
If specific tooling is used for catalyst distribution, then manufacturing precision is improved, but ease of manufacture decreases
Solution Approach 1:
The invention removes the need for specialized tooling by using a manifold structure that can be manufactured with standard fabrication processes. The simplified geometry and integrated design allow for conventional manufacturing methods while achieving homogeneous catalyst distribution through the manifold's inherent flow distribution characteristics.
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 solution enables more homogeneous catalyst distribution, reduces catalyst volume, simplifies the design and fixing of manifolds, and allows for increased heat exchanger section size, improving manufacturing efficiency and thermal performance while maintaining filtration efficiency.
Implementation Method 1
a filtering device arranged in at least one passage of the first series, said filtering device extending for the one part between two adjacent plates defining said passage and for the other part between two of the closure bars delimiting said passage
Implementation Method 2
a first series of passages for a flow of at least a first fluid... a second series of passages for a flow of at least a second fluid... heat-exchange relationship
Data Source
AI summary
A heat exchanger having a stack of multiple plates which are parallel to one another and to a longitudinal direction, and stacked spaced apart from one another so as to define, between one another, a first series of passages for the flow of at least a first fluid in an overall flow direction parallel to the longitudinal direction, each passage being delimited by closure bars disposed between the plates. A filtering device is arranged in at least one passage of the first series, the filtering device extending for the one part between two adjacent plates defining the passage and for the other part between two of the closure bars delimiting the passage, the filtering device having a metal sheet material chosen from among a metal fabric, a nonwoven of metal fibres, a sintered metal powder or sintered metal fibres, a metal foam, or a microperforated plate.