Additive Microchannel Reactor Structure for Low-Stress Solar Processing
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Solution Overview
Problem
Conventional manufacturing methods for chemical reactors, such as subtractive machining, result in high material waste and costs due to the need for multiple parts and assembly steps, as well as thicker walls that increase thermal stresses and reduce reactor efficiency and lifespan.
Innovation Solution
The use of additive manufacturing (AM) to create microchannel or mesochannel devices with thinner walls and integrated catalyst structures, allowing for radial fluid flow and thermal expansion management, reduces material usage, assembly complexity, and enhances heat transfer and catalyst activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If subtractive machining is used to manufacture chemical reactors, then manufacturing precision can be achieved, but material waste and cost increase significantly
Solution Approach 1:
The patent replaces subtractive mechanical machining with additive manufacturing (3D printing) technology. This substitution eliminates material removal processes, achieving near 100% material utilization while maintaining manufacturing precision through digital modeling and controlled deposition of reactor materials.
Solution Approach 2:
The invention changes the manufacturing approach from mechanical subtraction to additive construction, fundamentally altering the production parameters. This includes transitioning from CNC machining parameters to 3D printing parameters such as layer thickness, deposition rate, and temperature control, thereby eliminating material waste.
2Adaptability or versatility
If multiple parts are assembled to create reactor structures, then design flexibility is improved, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple separate reactor components into a single integrated structure manufactured by additive manufacturing. The complex internal channels, catalyst support structures, and flow paths that would traditionally require multiple assembled parts are now created as one monolithic component, eliminating assembly steps while maintaining design flexibility through digital modeling.
Solution Approach 2:
The invention utilizes the third dimension extensively in additive manufacturing to create complex internal geometries and spatial arrangements of channels and catalysts. This dimensional freedom allows integration of multiple functions in a single structure without increasing assembly complexity, as the complexity is resolved through vertical layering rather than horizontal assembly.
3Strength
If thicker walls are used in conventional reactors, then structural strength is improved, but thermal stresses increase and reactor efficiency decreases
Solution Approach 1:
The patent applies local quality by varying wall thickness according to specific structural and thermal requirements in different regions of the reactor. Additive manufacturing enables thinner walls where thermal efficiency is critical while maintaining adequate thickness in high-stress areas, optimizing the balance between strength and thermal performance to reduce thermal stresses and extend reactor lifespan.
4Loss of substance
If conventional manufacturing methods are used, then material utilization is poor, but manufacturing cost per unit mass is lower
Solution Approach 1:
The patent replaces conventional subtractive manufacturing with additive manufacturing, fundamentally changing the cost structure. Although additive manufacturing has higher material costs per kilogram, the near 100% material utilization eliminates the waste associated with subtractive methods, and the integration of multiple components reduces assembly costs, making the overall manufacturing process more cost-effective for complex reactor designs.
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 approach decreases reactor mass and cost, improves heat transfer and durability, and extends catalyst life, while allowing for more efficient chemical reactions and reduced thermal stresses, thereby enhancing the overall performance and longevity of solar-powered chemical processors.
Implementation Method 1
a solar concentrator having a concave shape and a dome-shaped chemical processor is adapted to conduct a unit operation is disposed in relation to the solar concentrator
Implementation Method 2
converts solar heat to chemical energy through endothermic chemical reactions
Implementation Method 3
the convex face of the chemical processor comprises a tube or tubes for passage of a fluid to or from a central area of the dome to the peripheral area of the dome
Data Source
AI summary
Chemical processors are configured to reduce mass, work in conjunction with solar concentrators, and/or house porous inserts in microchannel or mesochannel devices made by additive manufacturing. Methods of making chemical processors containing porous inserts by additive manufacturing are also disclosed.