Systems and methods for periodic nodal surface based reactors, distributors, contactors and heat exchangers

Patent metadata

Field	Value
Publication number	US-11885568-B2
Application number	US-202117365622-A
Country	US
Kind code	B2
Filing date	Jul 1, 2021
Priority date	Jan 9, 2019
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

The present disclosure relates to a transport mechanism apparatus for transporting at least one of a gas or a fluid. The transport mechanism may have an inlet, an outlet and an engineered cellular structure forming a periodic nodal surface, which may include a triply periodic minimal surface (TPMS) structure. The structure is formed in a layer-by-layer three dimensional (3D) printing operation to include cells propagating in three dimensions, where the cells include non-intersecting, continuously curving wall portions having openings, and where the opening in the cells form a plurality of flow paths throughout the transport mechanism from the inlet to the outlet, and where portions of the cells form the inlet and the outlet.

First claim

What is claimed is:

1. A transport mechanism apparatus forming a periodic nodal surface for transporting at least one of a gas or a liquid, comprising:
an inlet;
an outlet; and
an engineered cellular structure formed in a three dimensional (3D) printing operation to include cells propagating periodically in three dimensions, with non-intersecting, non-flat, continuously curving wall portions which form two non-intersecting domains, and where the wall portions having openings forming a plurality of flow paths extending in three orthogonal dimensions throughout the transport mechanism apparatus from the inlet to the outlet; and
the engineered cellular structure having wall portions having a mean curvature other than zero.

2. The apparatus of claim 1 , wherein the engineered cellular structure comprises a periodic nodal surface structure.

3. The apparatus of claim 1 , where a first subportion of the cells include openings which form the inlet, and a second subportion of the cells include openings forming the outlet.

4. The apparatus of claim 1 , wherein the cells decrease smoothly in size from the inlet moving towards the outlet.

5. The apparatus of claim 1 , wherein the cells decrease smoothly in size moving from the outlet to towards the inlet.

6. The apparatus of claim 1 , wherein the apparatus has a central portion disposed between the inlet and outlet, and wherein the cells decrease smoothly in size moving from the inlet and outlet towards the central portion of the apparatus.

7. The apparatus of claim 1 , wherein the thickness of the wall portions is non-uniform across at least one of a length (X plane), a height (Y plane) and a depth (Z plane) of the apparatus, from the inlet to the outlet.

8. The apparatus of claim 1 , wherein the wall portions comprise at least one of:
a gas separation membrane; or
a gas absorption monolith.

9. The apparatus of claim 1 , wherein the engineered cellular structure is defined by a level set function.

10. The apparatus of claim 9 , wherein the level set function comprises:
F ( x,y,z )= t , where:
t=constant which determines a volume of fractions of two domains separated by a level set surface; and
F(x,y,z) controls a shape of a geometry of the cells of the engineered cellular structure.

11. The apparatus of claim 1 , wherein the engineered cellular structure is defined using level set surfaces that divide the engineered cellular structure into three continuous volumes.

12. The apparatus of claim 1 , wherein the cells are non-uniform in size over at least one of a length (X plane), a height (Y plane) and a depth (Z plane) of the apparatus.

13. The apparatus of claim 12 , wherein each of the cells forms a unit cell, and wherein a size gradient of each of the unit cells is controlled in accordance with a formula:
L modified =L +(1− H ε (φ)) Lf

where L is a length of the unit cell, and f a shrinkage or expansion factor of the unit cell;
where H ε (φ) is a smoothed Heaviside function which determines a variation of a graded zone:

H
ɛ

⁡

(
ϕ
)

=

{

1
,

ϕ
<

-
ɛ

[

1
+

ϕ
ɛ

+

1
π

⁢

sin
⁡

(

π
⁢
ϕ

ɛ

)

]

,


ϕ


≤
ɛ

0
,

ϕ
>
ɛ

and where φ(x, y, z) is a level set function to determine where a modification in a size gradient takes place along the apparatus.

14. The apparatus of claim 1 , wherein the engineered cellular structure is formed using at least one of:
fused deposition modeling; and
direct metal laser sintering.

15. The apparatus of claim 1 , wherein the cells are formed such that the wall portions comprise at least one of:
a permeable printed support;
a printed composite sorbent;
an impermeable conductive support;
a permeable membrane that forms a gas/liquid contacting surface; and
a permeable membrane that forms a gas and liquid contacting surface with a heat exchange operation.

16. A 3D printed transport mechanism apparatus forming a periodic nodal structure for transporting at least one of a gas or a liquid, comprising:
an inlet;
an outlet;
an engineered cellular structure formed in a layer-by-layer three dimensional (3D) printing operation to include cells having non-intersecting wall portions forming two independent domains, wherein the non-intersecting wall portions propagate in three orthogonal directions, and wherein the cells include wall portions having openings which help, together with the non-intersecting wall portions, to form a plurality of flow paths throughout the transport mechanism from the inlet to the outlet, and where portions of the cells form the inlet and the outlet;
at least one of a wall thickness or a dimension of the cells is non-uniform across at least one of a length (X plane), a height (Y plane) or depth (Z plane) of the apparatus; and
the engineered cellular structure has wall portions having a mean curvature other than zero.

Assignees

• L Livermore Nat Security Llc

Inventors

• Iyer Jaisree Kannan
• Roy Pratanu
• Nguyen Du T
• Stolaroff Joshuah K

Classifications

• B01D71/701

  Polydimethylsiloxane · CPC title

• B01D2325/021

  Pore shapes · CPC title

• B01D67/00415

  by additive layer techniques, e.g. selective laser sintering [SLS], selective laser melting [SLM] or 3D printing · CPC title

• B01D67/00045

  by additive layer techniques, e.g. selective laser sintering [SLS], selective laser melting [SLM] or 3D printing · CPC title

• B01D71/022

  Metals · CPC title