Non-linear fin heat sink

Abstract

A non-linear fin heat sink is provided for dissipating/removing heat uniformly from a device, where the heat generation is non-uniform over that device, while also providing a small and relatively lightweight heat sink. The heat sink has extended surface protrusions that are optimally shaped in recognition of convective heat transfer, conductive heat transfer, and flow resistance allowing the heat sink to offset the temperature rise of a coolant media and provide enhanced cooling for the coolant temperature, deliver optimized cooling efficiency per the local physical properties of the coolant media, be used with a fluid for effectuating heat transfer; either liquid coolant, gas coolant or a combination thereof. Furthermore the heat sink features turbulence enhancement of the coolant stream by a pin array through which coolant stream passes, such fin array featuring a non-linear shape, spacing, and height pattern to provide optimal cooling while simultaneously reducing volume and flow resistance.

1 . A non-linear fin heat sink, comprising:
 a base;   a plurality of fins disposed on an upper surface of the base, wherein each fin has a cross-sectional fin longitudinal dimension and a cross-sectional fin transverse dimension, and the fins are arranged in a plurality of longitudinal rows and a plurality of transverse rows; and   an upper lid disposed on the top of the fins;   wherein the base and the upper lid are formed a boundary for flowing inside, one side of the heat sink is a leading edge for flowing in and a corresponding side of the heat sink is a trailing edge for flowing out.   
   
   
       2 . The non-linear fin heat sink as claimed in  claim 1 , wherein the longitudinal rows are in staggered relationship with each other. 
   
   
       3 . The non-linear fin heat sink as claimed in  claim 1 , wherein the upper lid and the base are both planar, and a distance therebetween is constant. 
   
   
       4 . The non-linear fin heat sink as claimed in  claim 3 , wherein each height of at least one entrance fins at the leading edge is less than a height of a exit fin at the trailing edge, and the height of the exit fin at the trailing edge is equal to the distance between the upper lid and base. 
   
   
       5 . The non-linear fin heat sink as claimed in  claim 4 , wherein a height of an initial fin in the entrance fins has to meet two requirements: ∈>820 ν/U and ∈>0.308δ d , wherein ∈ is the height of the initial fin (m), ν is the kinematic viscosity (m 2 /s), U is fluid velocity (m/s) and δ d  is the height of the displacement boundary layer (m) where 1.7208 Re x   −0.5 . 
   
   
       6 . The non-linear fin heat sink as claimed in  claim 5 , wherein the height of the downstream fins in the entrance fins is based on the increase in the velocity boundary layer thickness. 
   
   
       7 . The non-linear fin heat sink as claimed in  claim 4 , wherein the fin transverse dimension increases in relation to the thickness of the boundary layer. 
   
   
       8 . The non-linear fin heat sink as claimed in  claim 7 , wherein the fins are arranged to form a first group of fins and a second group of fins. 
   
   
       9 . The non-linear fin heat sink as claimed in  claim 8 , wherein the first group of pins is from the leading edge to a first predetermined distance of a total heat sink length, and the second group of fins is from the first predetermined distance of the total heat sink length to the trailing edge. 
   
   
       10 . The non-linear fin heat sink as claimed in  claim 9 , wherein a fin aspect ratio described as fin longitudinal dimension divided by fin transverse dimension progresses from high aspect ratio ellipses at the leading edge to low aspect ratio ellipses at the first distance of the total heat sink length in the first group of fins. 
   
   
       11 . The non-linear fin heat sink as claimed in  claim 10 , wherein the first transverse row of the first group of fins has an aspect ratio of 6.0:1 and the last transverse row of the first group of fins has an aspect ratio of 2.0:1, with the aspect ratio of the fins in intervening transverse rows decreasing linearly from the first row to the last row. 
   
   
       12 . The non-linear fin heat sink as claimed in  claim 11 , wherein a first portion of transverse rows of the first group of fins has an aspect ratio of 6.0:1; a next portion of transverse rows of the first group of fins has an aspect ratio of 5.5:1; a next portion of transverse rows of the first group of fins has an aspect ratio of 5.0:1; a next portion of transverse rows of the first group of fins has an aspect ratio of 4.5:1; a next portion of transverse rows of the first group of fins has an aspect ratio of 4.0:1; a next portion of transverse rows of the first group of fins has an aspect ratio of 3.5:1; a next portion of transverse rows of the first group of fins has an aspect ratio of 3.0:1; a next portion of transverse rows of the first group of fins has an aspect ratio of 2.5:1; a remaining portion of transverse rows of the first group of fins has an aspect ratio of 2.0:1. 
   
   
       13 . The non-linear fin heat sink as claimed in  claim 9 , wherein the fin aspect ratio described as fin longitudinal dimension divided by fin transverse dimension progresses from low aspect ratio ellipses at the first distance of the total heat sink length back to high aspect ratio ellipses at the trailing edge. 
   
   
       14 . The non-linear fin heat sink as claimed in  claim 13 , wherein the transverse row of the second group of fins has an aspect ratio of 3.0:1; the last transverse row of the second group of fins has an aspect ratio of 6.0:1; and the aspect ratio of the intervening transverse rows increases linearly from the first row to the last row. 
   
   
       15 . The non-linear fin heat sink as claimed in  claim 14 , wherein a first portion of transverse rows of the second group of fins has an aspect ratio of 3.0:1; a next portion of transverse rows of the second group of fins has an aspect ratio of 4.0:1; a next portion of transverse rows of the second group of fins has an aspect ratio of 5.0:1; and a last portion of transverse rows of the second group of fins has an aspect ratio of 6.0:1. 
   
   
       16 . The non-linear fin heat sink as claimed in  claim 4 , wherein a number of fins along the leading edge is diminished for lending a heat sink entrance with a “U” shape. 
   
   
       17 . The non-linear fin heat sink as claimed in  claim 16 , wherein the heat sink entrance is a parabolic entrance region. 
   
   
       18 . The non-linear fin heat sink as claimed in  claim 16 , wherein the heat sink entrance is a hyperbolic entrance region. 
   
   
       19 . The non-linear fin heat sink as claimed in  claim 16 , wherein a shape of each fin is changed depending on the distance between each fin and the leading edge. 
   
   
       20 . The non-linear fin heat sink as claimed in  claim 19 , wherein each fin at a first predetermined distance of the longitudinal distance of the heat sink base is of a conical shape. 
   
   
       21 . The non-linear fin heat sink as claimed in  claim 20 , wherein each fin comprises a fin base and a fin tip, and each fin progresses from the large fin base attached to the base to the fin tip. 
   
   
       22 . The non-linear fin heat sink as claimed in  claim 19 , wherein each fin at a second predetermined distance of the longitudinal distance of the heat sink base is of a concave hyperbolic shape. 
   
   
       23 . The non-linear fin heat sink as claimed in  claim 22 , wherein each fin comprises a fin base and a fin tip, and each fin progresses along a concave hyperbolic curve from the fin base attached to base to the truncated fin tip. 
   
   
       24 . The non-linear fin heat sink as claimed in  claim 19 , wherein each fin at a third predetermined distance of the longitudinal distance of the heat sink base is of a concave parabolic shape. 
   
   
       25 . The non-linear fin heat sink as claimed in  claim 24 , wherein each fin comprises a fin base and a fin tip, and each fin progresses along a concave parabolic curve from the fin base attached to base to the truncated fin tip. 
   
   
       26 . The non-linear fin heat sink as claimed in  claim 19 , wherein each fin at a fourth predetermined distance of the longitudinal distance of the heat sink base is of a cylindrical profile. 
   
   
       27 . The non-linear fin heat sink as claimed in  claim 26 , wherein the side walls of each fin progress along a straight line perpendicular from the base. 
   
   
       28 . The non-linear fin heat sink as claimed in  claim 19 , wherein each fin at a fifth predetermined distance of the longitudinal distance of the heat sink base is of a conical shape. 
   
   
       29 . The non-linear fin heat sink as claimed in  claim 28 , wherein each fin comprises a fin base and a fin tip, and each fin progresses from the large fin base attached to the base to the fin tip. 
   
   
       30 . The non-linear fin heat sink as claimed in  claim 1 , wherein each fin is formed of an airfoil-shape. 
   
   
       31 . The non-linear fin heat sink as claimed in  claim 30 , wherein a radius of curvature of the fins are varying depending on the distance from the leading edge. 
   
   
       32 . The non-linear fin heat sink as claimed in  claim 30 , wherein the radius of curvature of the fins is reduced using an exponential function. 
   
   
       33 . The non-linear fin heat sink as claimed in  claim 1 , wherein the fins are made from at least one material. 
   
   
       34 . The non-linear fin heat sink as claimed in  claim 32 , wherein the fins near the leading edge are constructed of materials having a lower thermal conductivity than fins farther from the leading edge. 
   
   
       35 . The non-linear fin heat sink as claimed in  claim 33 , wherein the fins near the trailing edge are constructed of materials having a higher thermal conductivity than fins farther from the trailing edge. 
   
   
       36 . The non-linear fin heat sink as claimed in  claim 1 , wherein a surface of each fin is a porous surface. 
   
   
       37 . The non-linear fin heat sink as claimed in  claim 36 , wherein each fin is constructed of a porous material infused with a chemical. 
   
   
       38 . The non-linear fin heat sink as claimed in  claim 36 , wherein the surface of each fin is coated with a chemical. 
   
   
       39 . The non-linear fin heat sink as claimed in  claim 36 , wherein the fins are coated with at least one chemical. 
   
   
       40 . The non-linear fin heat sink as claimed in  claim 33 , wherein the fins are arranged with a varying aspect ratio of the fins depending on the distance from the leading edge. 
   
   
       41 . A method for producing a non-linear fin heat sink, comprising:
 providing a base with a plurality of base fins thereon;   providing an upper lid with a plurality of upper lid fins thereon.   facing a surface of the upper lid with the upper lid fins downwardly corresponding to a surface of the base with the base fins;   combining the upper lid and the base; and   forming a fluid channel.   
   
   
       42 . The method as claimed in  claim 41 , wherein an upper lid fin space is formed between each two adjacent upper lid fins. 
   
   
       43 . The method as claimed in  claim 42 , wherein the base fins respectively fit into the upper lid fin spaces. 
   
   
       44 . The method as claimed in  claim 41 , wherein a base fin space is formed between each two adjacent base fins. 
   
   
       45 . The method as claimed in  claim 44 , wherein the upper lid fins respectively fit into the base fin spaces. 
   
   
       46 . A heat exchanger, comprising:
 a shell tube having a leading edge and a trail edge, wherein a plurality of internal shell tube fins are disposed on an interior surface thereof;   a heat exchanger tube having a leading edge and a trail edge disposed inside the shell tube; wherein a plurality of exterior fins and interior fins are respectively disposed on an exterior surface and an interior surface of the heat exchanger tube.   
   
   
       47 . The heat exchanger as claimed in  claim 46 , wherein a plurality of external fins are located on an external surface of the shell tube. 
   
   
       48 . The heat exchanger as claimed in  claim 46 , wherein each height of at least one entrance fins at the leading edge is less than a height of an exit fin at the trailing edge. 
   
   
       49 . The heat exchanger as claimed in  claim 46 , wherein each fin has a cross-sectional fin longitudinal dimension and a cross-sectional fin transverse dimension, and the fins are arranged in a plurality of longitudinal rows and a plurality of transverse rows. 
   
   
       50 . The heat exchanger as claimed in  claim 49 , wherein a fin aspect ratio described as fin longitudinal dimension divided by fin transverse dimension progresses from high aspect ratio ellipses at the leading edge to low aspect ratio ellipses at a first distance of the total heat sink length. 
   
   
       51 . The heat exchanger as claimed in  claim 50 , wherein the fin aspect ratio described as fin longitudinal dimension divided by fin transverse dimension progresses linearly from low aspect ratio ellipses at the first distance of the total heat sink length back to high aspect ratio ellipses at the trailing edge. 
   
   
       52 . A heat sink, comprising:
 a first sink having an entrance and an exit, wherein a first fin array is disposed inside the first sink;   a second sink having an entrance and an exit, wherein a second fin array is disposed inside the second sink; and   a manifold connected between the exit of the first sink and the entrance of the second sink, wherein a plurality of manifold fins are dispose inside the manifold;   wherein a fluid flows through the first fin sink and enters the manifold to turn to enter the second fin sink.   
   
   
       53 . The heat sink as claimed in  claim 52 , wherein each manifold fin has predetermined configuration. 
   
   
       54 . The heat sink as claimed in  claim 53 , wherein a fin aspect ratio described as a fin longitudinal dimension divided by a fin transverse dimension progresses from high aspect ratio ellipses at the entrance to low aspect ratio ellipses at a first distance of the total heat sink length in the second fin array. 
   
   
       55 . The heat sink as claimed in  claim 54 , wherein the fin aspect ratio described as the fin longitudinal dimension divided by the fin transverse dimension progresses linearly from low aspect ratio ellipses at the first distance of the total heat sink length back to high aspect ratio ellipses at the exit in the second fin array. 
   
   
       56 . A manifold-heatsink assembly, comprising:
 a manifold housing having at least one receiving space and an upper lid formed thereinside;   at least one non-linear fin heat sink attached inside the receiving space, wherein the non-linear fin heat sink comprises a base and a plurality of fins projected from the base the base to contact the upper lid;   a module baseplate covered on the manifold housing;   an incoming coolant port defined on a sidewall of the manifold housing to communicate with the receiving space; and   an outgoing coolant port defined on the sidewall of the manifold housing to communicate with the receiving space;   wherein base upper lid and sidewalls of manifold housing define an outline shape to provide a flow cavity.   
   
   
       57 . The manifold-heatsink assembly as claimed in  claim 56 , wherein a sealing element is disposed on edges of the receiving space to prevent fluid leakage. 
   
   
       58 . The manifold-heatsink assembly as claimed in  claim 56 , wherein a layer of thermal interface material is provided between module baseplate and base. 
   
   
       59 . A non-linear impingement fin heat sink, comprising:
 a heat transferring baseplate;   a plurality of fins disposed on the heat transferring baseplate; and   at least one outlet ports defined on sides of the heat transferring baseplate;   wherein the fins are arranged to form an impingement point at a portion of the baseplate, an inlet cylindrical fins region surrounding the impingement point, an elliptical fins region surrounding the inlet cylindrical fins region.   
   
   
       60 . The non-linear impingement fin heat sink as claimed in  claim 59 , wherein the elliptical fins region has a first portion of fins and a second portion of fins. 
   
   
       61 . The non-linear impingement fin heat sink as claimed in  claim 60 , wherein the first portion of fins is arranged parallel to the bulk flow and the second of fins is at a slight angle to the bulk flow. 
   
   
       62 . A multiple inlet/outlet non-linear coldplate, comprising:
 a baseplate; and   a plurality of fins disposed on the baseplate;   wherein the fins are arranged to form at least one impingement point and at least one outlet flow portion.   
   
   
       63 . A plate fin heat sink, comprising:
 a base; and   a plurality of fins mounted on the base, wherein each fin has a fin transverse dimension;   wherein the plate fin heat sink has a leading edge and a trailing edge for a fluid entering and draining the plate fin heat sink.   
   
   
       64 . The plate fin heat sink as claimed in  claim 63 , wherein the fins are parallel to the flow axis of the fluid. 
   
   
       65 . The plate fin heat sink as claimed in  claim 63 , wherein the fin transverse dimension of each fin increases from the leading edge to a predetermined length of the heat sink. 
   
   
       66 . The plate fin heat sink as claimed in  claim 64 , wherein the fin transverse dimension of each fin increases in relation to a, the thickness of the boundary layer. 
   
   
       67 . The non-linear fin heat sink as claimed in  claim 65 , wherein the fin transverse dimension of each fin decreases from the predetermined length of the heat sink to the trailing edge. 
   
   
       68 . A heat sink, comprising
 a base;   a plurality of discrete fin patterns wherein each fin pattern is formed of a plurality of fins;   a upper lid covered on the fin patterns; and   a plurality of flow diverters disposed between each two fin patterns.   
   
   
       69 . The heat sink as claimed in  claim 68 , wherein a plurality of base flow diverters are protruding from the base. 
   
   
       70 . The heat sink as claimed in  claim 68 , wherein a plurality of lid flow diverters are protruding from the upper lid.