Spherical Heat Transfer Media with Curvilinear Indentations
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Solution Overview
Problem
Existing random packing configurations for chemical processing and heat transfer equipment struggle to maximize both surface area and free space while maintaining structural strength, particularly in deep packed beds, leading to suboptimal mass transfer and heat exchange efficiency.
Innovation Solution
A generally spherical packing element with a hollow configuration and curvilinear indentations on its outer surface, providing increased surface area and minimal sacrifice of free space, achieving approximately 2.5 times the surface area of a standard solid sphere with only a 4% decrease in free space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional random packing configurations are used, then manufacturing and installation are economical, but surface area is insufficient for efficient mass transfer and heat exchange
Solution Approach 1:
The patent employs spherical packing elements with curvilinear indentations instead of conventional flat or angular shapes. The spherical geometry with curved surface features increases the surface area available for mass transfer and heat exchange while maintaining random packing characteristics, directly resolving the contradiction between economical manufacturing and sufficient surface area.
Solution Approach 2:
The spherical elements incorporate multiple openings and indentations that create a porous structure. This increases the effective surface area for phase exchange while maintaining the random packing configuration, thereby improving mass transfer efficiency without sacrificing the economical manufacturing advantage of simple geometric forms.
2Area of stationary object
If surface area is maximized through complex packing shapes, then mass transfer efficiency improves, but free space decreases leading to increased pressure drop
Solution Approach 1:
The spherical elements are segmented with multiple openings and indentations that create distinct surface regions. This segmentation increases surface area for mass transfer while the hollow interior and strategic opening placement preserve significant free space within each element, balancing the contradiction between surface area maximization and free space maintenance.
Solution Approach 2:
The invention utilizes the three-dimensional spherical geometry with indentations that extend into the element volume. This dimensional approach allows surface area to be increased by utilizing the curved surfaces and indentations without proportionally increasing the external volume occupied, thereby preserving free space in the packed bed.
3Area of stationary object
If packing elements are made with high surface area features, then mass transfer efficiency increases, but structural strength decreases causing collapse in deep beds
Solution Approach 1:
The spherical geometry provides inherent structural strength to resist collapse in deep packed beds, while the curvilinear indentations and openings are designed to increase surface area without creating weak points. The rounded contours distribute mechanical stresses more effectively than angular features, maintaining structural integrity while enhancing mass transfer surface area.
4Area of stationary object
If hollow spherical configuration with indentations is used, then surface area increases to 2.5 times that of solid sphere, but free space decreases by 4%
Solution Approach 1:
The hollow spherical elements with multiple openings create a porous structure that increases surface area for mass transfer. The porous design allows the element to present extended surface area (2.5x solid sphere) while the openings and hollow configuration maintain sufficient free space (96% of conventional packing) by reducing the solid material volume.
Data Source
AI summary
An improved random packing is the subject of the present invention. The packing element comprises a generally spherically shaped member which can be a perfect sphere, an ellipse, or some variation on either of the foregoing. The sphere is a hollow body having inner and outer surfaces with a plurality of openings passing through the body. A hypothetical axis passing through the sphere defines circular openings at both ends and the openings in between these two ends are generally elongated. The solid walls which form the sphere are of sufficient thickness so as to accommodate a plurality of indentations, some of which are formed in the solid walls and other indentations being formed coincidentally with the elongated openings between the solid wall sections. The indentations are characterized by curvilinear surfaces so that the total surface area presented by the inner surface (S1) and all of the remaining surfaces (S2) are at least twice the area of solid sphere of the same diameter with no indentations.