Patent Publication Number: US-2023139714-A1

Title: Mil-aero conduction cooling chassis

Description:
BACKGROUND 
     Current iterations of electronic devices include various high power processing modules, for example central processing units, graphics processing units, field programmable gate array processing units, and so forth. These high power processing modules generate heat when executing, and therefore require cooling systems that maintain the temperature of the processing power modules within an acceptable range. 
     Current methods of cooling include direct forced air cooling, liquid cooling, and conduction cooling. Direct forced air cooling across module circuit cards is not feasible in tactical platforms due to the risk of sand, dust, or other contaminants that could damage or destroy the electronic components. Liquid cooling is effective but hampered by high costs and design complexity. Liquid cooling is also prone to leaks and mechanical development challenges associated with designing and testing the internal fluid transfer paths. Conduction air cooling is economical and efficient for medium-sized tactical applications, but has critical limitations when it comes to cooling high-powered modules. Thermal models, test data, and deployed system thermal qualification test results have shown that traditional VPX conduction cooling hits an upper bound as the module power approaches sixty to seventy watts. 
     SUMMARY 
     The disclosed examples are described in detail below with reference to the accompanying drawing figures and listed below. The following summary is provided to illustrate examples or implementations disclosed herein. It is not meant, however, to limit all examples to any particular configuration or sequence of operations. 
     In one implementation, a heat frame is provided. The heat frame comprises a plurality of fins and at least one heat pipe extending through a hole provided in each of the plurality of fins. The heat frame is coupled to a cooling chassis. 
     In another implementation, a processing device is provided. The processing device includes a processing module, a first heat frame coupled to a first side of the processing module, and a second heat frame coupled to a second side of the processing module. Each of the first heat frame and the second heat frames comprises a plurality of fins, each fin of the plurality of fins including at least one hole. Each fin of the plurality of fins is parallel to every other fin; and at least one heat pipe extending through the hole provided in each of the plurality of fins. 
     In another implementation, a conduction cooling chassis is provided. The conduction cooling chassis includes a processing device, a first cooling chassis, and a second cooling chassis. The processing device includes a first heat frame, a second heat frame, and a processing module provided between the first heat frame and the second heat frame. Each of the first cooling chassis and the second cooling chassis includes a first wall, a second wall, and a slot provided between the first wall and the second wall. A junction between the first heat frame and the processing module is provided in the slot of the first cooling chassis and a junction between the second heat frame and the processing module is provided in the slot of the second cooling chassis. 
     Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions, and claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts: 
         FIG.  1    illustrates a perspective view of a processing device according to various implementations of the present disclosure; 
         FIG.  2    illustrates a perspective view of a cooling chassis according to various implementations of the present disclosure; 
         FIG.  3    illustrates a magnified, perspective view of a cooling chassis according to various implementations of the present disclosure; 
         FIG.  4 A  illustrates an exploded view of a cooling chassis assembly according to various implementations of the present disclosure; 
         FIG.  4 B  illustrates a rear perspective view of a cooling chassis assembly according to various implementations of the present disclosure; 
         FIG.  4 C  illustrates a front perspective view of the cooling chassis according to various implementations of the present disclosure; 
         FIG.  5 A  illustrates a perspective view of a rail clamp assembly according to various implementations of the present disclosure; 
         FIG.  5 B  illustrates a magnified, perspective view of a rail clamp according to various implementations of the present disclosure; 
         FIG.  6 A  illustrates a perspective view of the heat frame sidewall according to various implementations of the present disclosure; 
         FIG.  6 B  illustrates a side view of the heat frame sidewall according to various implementations of the present disclosure; 
         FIG.  7 A  illustrates an exploded view of an assembly including the processing device according to various implementations of the present disclosure; 
         FIG.  7 B  illustrates a perspective view of an assembly including the processing device according to various implementations of the present disclosure; 
         FIG.  8 A  illustrates a perspective view of a processing device according to various implementations of the present disclosure; 
         FIG.  8 B  illustrates a front view of a processing device according to various implementations of the present disclosure; 
         FIG.  9    illustrates a conduction cooling chassis according to various implementations of the present disclosure; 
         FIG.  10    illustrates a flowchart diagram illustrating a workflow for cooling one or more processing devices according to various implementations of the present disclosure; and 
         FIG.  11    illustrates a schematic perspective view of an aircraft including one or more processing devices described herein according to various implementations of the present disclosure. 
     
    
    
     Corresponding reference characters indicate corresponding parts throughout the accompanying drawings. 
     DETAILED DESCRIPTION 
     The various examples will be described in detail with reference to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. References made throughout this disclosure relating to specific examples and implementations are provided solely for illustrative purposes but, unless indicated to the contrary, are not meant to limit all implementations. 
     The foregoing summary, as well as the following detailed description of certain implementations will be better understood when read in conjunction with the appended drawings. As used herein, an element or step recited in the singular and preceded by the word “a” or “an” should be understood as not necessarily excluding the plural of the elements or steps. Further, references to an implementation or an example are not intended to be interpreted as excluding the existence of additional examples that also incorporate the recited features. Moreover, unless explicitly stated to the contrary, examples “comprising” or “having” an element or a plurality of elements having a particular property could include additional elements not having that property. 
     As referenced herein, conduction cooling refers to the cooling of a processing module by transferring heat from a heated processing module to a cooled plurality of heat pipes, fins, and heat transfer frame, thereby cooling the processing module. The conduction cooling can take place in a conduction cooling chassis, for example a mil-aero conduction cooling chassis. As referenced herein, a mil-aero conduction cooling chassis is a conduction cooling chassis that meets military and aerospace standards, which are typically more strict and rigorous than conventional standards. 
     As referenced herein, the existing solutions for cooling chassis methodologies each have advantages and disadvantages. Aspects of the present disclosure provide systems and methods that facilitate an air-cooled method for higher-powered module and enable the transition of expensive, liquid cooled architectures into an air-cooled design. The approach of the air-conduction-cooled chassis and module heat frame design presented herein overcomes the thermal limitations that are inherent in high-power, conduction cooled VPX processing modules. In some implementations, the chassis design specifically enables extensive module heat frame customization and flexibility, which enables high-powered modules to implement more exotic and/or optimized heat transfer solutions. 
     Aspects of the disclosure recognize and take into account that thermal conductivity is highest with non-structural devices, for example heat pipes and vapor chambers. Heat pipes and vapor chambers have higher thermal conductivity than solid metal by orders of magnitude. However, the junction between the module heat frame and the cooling chassis interface is required to absorb shock, vibration, and clamping pressure. Accordingly, non-structural heat transfer features are integrated as part of the solid heat frame structure. In other words, clamping and/or applying any form of structural pressure to heat pipes or vapor chambers would cause the heat pipes to collapse and fail. Therefore, alternative solutions are required. 
     Advanced cooling techniques are enabled by providing the heat frame edge direct access to the air stream. High-heat sources can dissipate heat into the air stream without first traversing through multiple inefficient thermal interfaces. Heat pipes, vapor chambers, and novel fin designs are all potential thermal solutions. The solution provided herein removes heat directly from the high-power heat source, i.e., the processing module, which typically contains a field-programmable gate array (FPGA), central processing unit (CPU), or graphics processing unit (GPU). 
     For example, embedded heat pipes are a straightforward method for moving large heat loads. Slot openings in the moveable cooling wall were specifically designed to enable this type of thermal solution. Embedded heat pipes can extend from directly on top of the highest-power source, e.g., a GPU, a CPU, etc., through the heat frame edge, and into the thermally dissipating structure of one or more parallel fins. Furthermore, a cooling solution, e.g., the one or more heat pipes, improve performance due to their inherently high thermal conductivity and weight savings, due to the pipe structure. 
       FIG.  1    illustrates a perspective view of a processing device according to various implementations of the present disclosure. The example of the processing device  100  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more processing devices having different shapes, sizes, configurations, and so forth. 
     The processing device  100  includes a heat frame  101 , a cooling chassis  111 , and a processing module  119 . The heat frame  101  includes a plurality of fins  103   a ,  103   b ,  103   n  and at least one heat pipe  107 . In some implementations, as illustrated in  FIG.  1   , the heat frame  101  includes a plurality of heat pipes  107   a ,  107   b ,  107   n . Each fin of the plurality of fins  103   a ,  103   b ,  103   n  includes at least one hole  105  through which a heat pipe of the plurality of heat pipes  107   a ,  107   b ,  107   n  extends. Each of the at least one holes  105  provided in each fin of the plurality of fins  103   a ,  103   b ,  103   n  are aligned such that each individual heat pipe  107  passes through a separate hole in each of the plurality of fins  103   a ,  103   b ,  103   n . In some implementations, a single fin  103  of the plurality of fins  103   a ,  103   b ,  103   n  includes a plurality of holes  105  in order for multiple heat pipes  107   a ,  107   b ,  107   n  to extend through. 
     In some implementations, each of the plurality of fins  103   a ,  103   b ,  103   n  are bonded to each of the plurality of heat pipes  107   a ,  107   n ,  107   n . For example, each of the plurality of heat pipes  107   a ,  107   n ,  107   n  can be thermally bonded to each of the plurality of fins  103   a ,  103   b ,  103   n . The plurality of heat pipes  107   a ,  107   n ,  107   n  can be thermally cooled via a forced air surface of the bonded plurality of fins  103   a ,  103   b ,  103   n.    
     The heat frame  101  further includes a frame  109  that supports the plurality of fins  103   a ,  103   b ,  103   n  and the plurality of heat pipes  107   a ,  107   b ,  107   n . In some implementations, the frame  109  and the plurality of fins  103   a ,  103   b ,  103   n  are comprised of the same material. In other implementations, the frame  109  and the plurality of fins  103   a ,  103   b ,  103   n  are comprised of different materials. In some implementations, the frame  109  and the plurality of fins  103   a ,  103   b ,  103   n  are comprised of copper, which provides high thermal conductivity properties. In some implementations, the frame  109  and the plurality of fins  103   a ,  103   b ,  103   n  are comprised of aluminum, which provides weight savings over copper. In some implementations, the frame  109  and the plurality of fins  103   a ,  103   b ,  103   n  are comprised of a mixture of copper and aluminum. 
     In some implementations, each of the plurality of heat pipes  107   a ,  107   b ,  107   n  are comprised of the same material as one or both of the frame  109  and the plurality of fins  103   a ,  103   b ,  103   n . In some implementations, each of the plurality of heat pipes  107   a ,  107   b ,  107   n  is comprised of copper. In some implementations, each of the plurality of heat pipes  107   a ,  107   b ,  107   n  is comprised of aluminum. In some implementations, each of the plurality of heat pipes  107   a ,  107   b ,  107   n  is comprised of a mixture of copper and aluminum. 
     In some implementations, the plurality of heat pipes  107   a ,  107   b ,  107   n  conduct heat from one area to another. The plurality of fins  103   a ,  103   b ,  103   n  provide both expanded surface area for heat dissipation and support for the plurality of heat pipes  107   a ,  107   b ,  107   n . The plurality of fins  103   a ,  103   b ,  103   n  can be provided in any suitable arrangement relative to the plurality of heat pipes  107   a ,  107   b ,  107   n . In the particular implementation illustrated in  FIG.  1   , the plurality of fins  103   a ,  103   b ,  103   n  extend from the frame  109  in a first direction A parallel to the cooling chassis  111  and each of the plurality of heat pipes  107   a ,  107   b ,  107   n  is provided in a second direction B perpendicular, or substantially perpendicular, to the first direction A. In other words, each of the plurality of heat pipes  107   a ,  107   b ,  107   n  is perpendicular to each of the plurality of fins  103   a ,  103   b ,  103   n . However, this implementation should not be construed as limiting. Various implementations are possible. In some implementations, each of the plurality of heat pipes  107   a ,  107   b ,  107   n  is parallel to each of the plurality of fins  103   a ,  103   b ,  103   n  and the cooling chassis  111 . In some implementations, some of the plurality of heat pipes  107   a ,  107   b ,  107   n  are parallel to the plurality of fins  103   a ,  103   b ,  103   n  and the cooling chassis  111  while other heat pipes of the plurality of heat pipes  107   a ,  107   b ,  107   n  are perpendicular to the plurality of fins  103   a ,  103   b ,  103   n  and the cooling chassis  111 . 
     Each of the plurality of heat pipes  107   a ,  107   b ,  107   n  is configured with an internal wick structure and a working fluid that is used for cooling the processing module  119 . In some implementations, the wick structure includes one or more of titanium, sintered copper, a screen, a hybrid, or specialty sintered or grooved. In some implementations, the working fluid includes one or more of water, ammonia, ethane, propylene, or any other suitable material. As cold or cooled air flows through the heat frame  101 , for example in the first direction A, the heated, vaporized, working fluid in the plurality of heat pipes  107   a ,  107   b ,  107   n  is cooled, returning the working fluid to liquid form. In liquid form, the working fluid traverses back to the heat source through capillary action where the heat transfer cycle repeats. 
     Heat transfers from the processing module  119  can occur via multiple mechanisms. In some implementations, heat is transferred from a high power source, such as a CPU, a GPU, an FPGA, etc., on the processing module  119  to the plurality of heat pipes  107   a ,  107   b ,  107   n  and is then dissipated in the plurality fins  103   a ,  103   b ,  103   n , thereby cooling the processing module  119 . In some implementations, heat is transferred from the high power source, such as a CPU, a GPU, an FPGA, etc., on the processing module  119  to the heat frame  101  and is then dissipated through conduction cooling (hatched region  FIG.  6 B ) against the cooling chassis  111 . As described in greater detail below, the heat can be dissipated from the heat frame  101  through conduction cooling via one or more of the first portion  601 , the second portion  603 , and the base  611  of the heat frame sidewall  600 , which are illustrated in  FIGS.  6 A and  6 B  and described in greater detail below. 
     The cooling chassis  111  includes a first wall  113 , a second wall  115 , and a slot  117  that comprises an open channel between the first wall  113  and the second wall  115 . In some implementations, the cooling chassis  111  is referred to as a cooling wall or a cooling chassis wall. In these implementations, the first wall  113  and the second wall  115  are referred to as extensions of a single cooling wall. The slot  117  provides alignment for the processing module  119 , provides a metal/metal thermal interface against the cooling chassis  111 , provides stability and support for the processing module  119 , and enables the heat frame  101  and thermal dissipation solution to extend directly into a cooled or chilled forced air channel, such as the channel  411 , into which the heat frame  101  is inserted when the processing module  119  is provided within a conduction cooling chassis. 
     The processing device  100  further includes a junction  121  between the processing module  119  and the heat frame  101  is provided at or around the slot  117 . In some implementations, the junction  121  is a point of connection between the processing module  119  and the heat frame  101 . In other implementations, the processing module  119  and the heat frame  101  are a continuous piece that is molded or cast as a single element. In these implementations, the junction  121  is the point at which, for purposes of illustration and discussion, the heat frame  101  ends and the processing module  119  begins. 
     The cooling chassis  111  includes a first side  111   a  and a second side  111   b . The first side  111   a  is adjacent to the processing module  119  and the second side  111   b  is adjacent to the heat frame  101  and is directly exposed to the forced air channel. In other words, the cooling chassis  111  provides separation between the processing module  119  and the heat frame  101  such that the processing module  119  is provided on a first side  111   a  and the heat frame  101  is provided on a second side  111   b , different than the first side  111   a . The cooling chassis  111  is described in greater detail below in the description of  FIGS.  2  and  3   . 
     The processing module  119  can be any type of processing module that utilizes cooling as described herein. In some implementations, the processing module  119  is a VPX module. In some implementations, the processing module  119  can include a central processing unit (CPU), a graphics processing unit (GPU), and/or any other high-powered processing unit or card. The processing module  119  can be used for any type of computer processing known to one of skill in the art, for example military applications, aerospace applications, security applications, various commercial applications, various communications applications, and so forth. In some implementations, the processing module  119  is a processing card coupled to two heat frames  101 , on opposite sides of the processing modules, to form the processing device  800  illustrated in  FIGS.  8 A and  8 B  and described in greater detail below. 
       FIG.  2    illustrates a perspective view of a cooling chassis according to various implementations of the present disclosure. The example of the cooling chassis  111  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more cooling chassis  111  having different shapes, sizes, configurations, and so forth. 
     The cooling chassis  111  includes a base  201  and one or more extensions  203   a ,  203   b ,  203   c ,  203   n  extending from the base  201 . In some implementations, the first wall  113  and the second wall  115  are each extensions  203  as shown in  FIG.  2   . For example, the first wall  113  of the cooling chassis  111  can be the extension  203   a  and the second wall  115  of the cooling chassis  111  can be the extension  203   b.    
     The cooling chassis  111  further includes one or more slots  205   a ,  205   b ,  205   n  provided between each of the extensions  203   a ,  203   b ,  203   c ,  203   n . For example, the slot  205   a  is provided between the extensions  203   a  and  203   b , the slot  205   b  is provided between the extensions  203   b  and  203   c , and so forth. It should be understood that each of the slots  205   a ,  205   b ,  205   c ,  205   n  can be the slot  117 . 
     In some implementations, one or more of the extensions  203   a ,  203   b ,  203   c ,  203   n  include a horizontal extension  207 . The horizontal extension  207  includes a hole  209  configured to receive an attachment unit, such as a screw, a nail, a staple, or any other suitable attachment unit. The horizontal extension  207  and the hole  209  enable the connection of a cover to the cooling chassis  111 . In these implementations, the cover is supported at least by the horizontal extension  207  and fastened to the cooling chassis  111  via the attachment unit inserted through the hole  209 . 
       FIG.  3    illustrates a magnified, perspective view of a cooling chassis according to various implementations of the present disclosure. The example of the cooling chassis  111  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more cooling chassis  111  having different shapes, sizes, configurations, and so forth. 
     The magnified view of the cooling chassis  111  illustrated in  FIG.  3    shows a section of the cooling chassis  111  that includes the base  201 , two extensions  203   a ,  203   b , and the slot  205   a  provided between the two extensions  203   a ,  203   b .  FIG.  3    further illustrates a groove  301  provided within the base  201 , the two extensions  203   a ,  203   b , and the slot  205   a . The groove  301  is provided in a U-shape similar to the U-shape created by the base  201 , the two extensions  203   a ,  203   b , and the slot  205   a . In some implementations, the shape and size of the groove  301  corresponds to a size and shape of an exterior of the processing module  119  and/or the heat frame  101  that is configured to be supported by the cooling chassis  111 . In other words, the groove  301  enables the cooling chassis to provide enhanced stability and support for the processing module  119  and the heat frame  101  through a modular, customized fit into the cooling chassis  111 . 
     Various implementations of the present disclosure recognize and take into account the limitations of the existing solutions utilized to stabilize and support a processing module within a conduction cooling chassis. One example solution is the wedge lock, which provides only a small surface contact area on the frame side metal/metal interface and provides uneven heat transfer. For example, by providing a movable conduction cooled wall, i.e., the cooling chassis  111 , between two fixed, immovable walls, the present application introduces a thermal design concept that provides stability and support for the processing module  119  within a conduction cooling chassis, provides uniform heat dissipation to a cooling chassis, i.e., the cooling chassis  111 , and provides direct heat frame access to a forced air channel, e.g., the forced air channel  411 , to incorporate advanced cooling techniques. 
       FIG.  4 A  illustrates an exploded view of a cooling chassis assembly according to various implementations of the present disclosure.  FIG.  4 B  illustrates a rear perspective view of a cooling chassis assembly according to various implementations of the present disclosure. The example of the cooling chassis assembly  400  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more cooling chassis assemblies  400  having different shapes, sizes, configurations, and so forth. 
     The cooling chassis assembly  400  includes the cooling chassis  111 , a fixed chassis exterior wall  401 , and an internal fixed chassis frame  403 . The fixed chassis exterior wall  401  is a solid structure that provides an exterior wall for a mil-aero conduction cooling chassis. The term fixed should be understood to mean immovable relative to the cooling chassis  111  and the internal fixed chassis frame  403 . In some implementations, the fixed chassis exterior wall  401  is connected to additional exterior walls of the mil-aero conduction cooling chassis, such as the first wall  701  and the third wall  705 , as described in greater detail below in the description of  FIGS.  7 A and  7 B . 
     The internal fixed chassis frame  403  includes a base  405  and two extensions  407   a ,  407   b . In some implementations, the base  405  corresponds to the base  201  of the cooling chassis  111 . For example, the length and height of the base  405  corresponds to the length and height of the base  201 . In some implementations, the two extensions  407   a ,  407   b  correspond to the external-most extensions  203   a ,  203   n  of the cooling chassis  111 . In other words, the total length of the internal fixed chassis frame  403  is approximately the same as the total length of the cooling chassis  111 . In some implementations, the total length of the fixed chassis exterior wall  401  is equal to the total length of the internal fixed chassis frame  403  and/or the cooling chassis  111 . In some implementations, the total length of the fixed chassis exterior wall  401  is less than the total length of the internal fixed chassis frame  403  and/or the cooling chassis  111 . 
     The internal fixed chassis frame  403  further includes a gasket  409  that creates a seal between the internal fixed chassis frame  403  and the cooling chassis  111  when the internal fixed chassis frame  403  and the cooling chassis  111  are brought into contact. For example, as illustrated in  FIG.  4 B , the cooling chassis  111  can be fastened against the internal fixed chassis frame  403  via one or more fasteners  419 . The seal created by the gasket  409  restricts air, dust particles, dirt particles, and so forth from passing through. In various implementations, the gasket  409  is comprised of one or more of a rubber material, a neoprene material, a silicone material, a polyurethane material, or any other suitable material to create a seal between the internal fixed chassis frame  403  and the cooling chassis  111 . 
       FIG.  4 C  illustrates a front perspective view of the cooling chassis according to various implementations of the present disclosure. The cooling chassis  111  includes a front face  413  and a rear face  415 . The rear face  415  interfaces with the gasket  409  of the internal fixed chassis frame  403 . The front face  413  faces the fixed chassis exterior wall  401 . In some implementations, the cooling chassis  111  includes a plurality of holes  417 . Each of the plurality of holes  417  is configured to receive a fastener  419  that fastens the cooling chassis  111  to one or both of the fixed chassis exterior wall  401  and the internal fixed chassis frame  403 . For example, one or both of the fixed chassis exterior wall  401  and the internal fixed chassis frame  403  can include respective holes corresponding to the plurality of holes  417  to also receive the fastener. The fastener  419  can be any type of fastener suitable for fastening the cooling chassis  111  to one or both of the fixed chassis exterior wall  401  and the internal fixed chassis frame  403 . For example, the fastener  419  can be a screw. 
     As discussed herein, the cooling chassis  111  and the internal fixed chassis frame  403  are brought into contact. The cooling chassis  111  and the internal fixed chassis frame  403  are brought into contact by the movement of the cooling chassis  111  toward the internal fixed chassis frame  403 . In some implementations, the cooling chassis  111  is moved toward and brought into contact with the internal fixed chassis frame  403  by one or more of spring loaded screws, worm screws, toggle clamps, rail clamps, snap latches, wedge locks, and so forth. In some implementations, a plurality of the fasteners  419  are used to bring the cooling chassis  111  into contact with the internal fixed chassis frame  403 . 
     For example, the fastener  419  can be a spring loaded screw that passes through one of the plurality of holes  417 . As the torque on the fastener  419  is increased, the cooling chassis  111  is brought into contact with the internal fixed chassis frame  403 . The torque on the fastener  419  is brought to a specified value. In some implementations, the specified value is determined so as to stay within mechanical tolerance requirements for the fastener  419 , the cooling chassis  111 , the internal fixed chassis frame  403 , and/or the fixed chassis exterior wall  401 . This enables the total motion of the cooling chassis  111  to be limited, by design, while also allowing only minimal relaxation to allow for installation and removal of a processing module  119 . As shown in  FIG.  4 C , the cooling chassis  111  includes a plurality of holes, each of which is configured to receive an individual fastener  419 . In so doing, multiple fasteners  419  can be torqued at approximately the same time to maintain even clamping pressure lengthwise along the cooling chassis  111 . 
     In some implementations, as discussed in greater detail below, a conduction cooling chassis, such as the mil-aero conduction cooling chassis  700 , includes two analogous cooling chassis  111  on opposite sides of the conduction cooling chassis. In these implementations, each cooling chassis  111  is brought into contact with the respective internal fixed chassis frame  403  simultaneously, or substantially simultaneously, in order to maintain even, parallel clamp pressure lengthwise along each cooling chassis  111 . 
     In another implementation, the cooling chassis  111  is brought into contact with the internal fixed chassis frame  403  via a rail clamp assembly.  FIG.  5 A  illustrates a perspective view of the rail clamp assembly according to various implementations of the present disclosure.  FIG.  5 B  illustrates a magnified, perspective view of the rail clamp according to various implementations of the present disclosure. The example of the rail clamp assembly  500  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more rail clamp assemblies  500  having different shapes, sizes, configurations, and so forth. 
     The rail clamp assembly  500  includes a first clamp  501 , a second clamp  503 , and a connector  520 . As shown in  FIG.  5 B , the first clamp  501  includes a first extending portion  511 , a second extending portion  513 , and a groove  515  provided between the first extending portion  511  and the second extending portion  513 . The groove  515  illustrated in  FIG.  5 B  is trapezoid shaped, but this example should not be construed as limiting. The groove  515  can be provided in a square shape, a rectangular shape, a circular shape, a triangular shape, or any other suitable shape. 
     In some implementations, the first extending portion  511  extends further than the second extending portion  513  while the second extending portion  513  has a wider face than the first extending portion  511 . It should be understood that the second clamp  503  has an identical configuration as the first clamp  501 , but is rotated one hundred eighty degrees in order to provide the same structure and stability on the opposite side of the conduction cooling chassis. 
     In some implementations, the rail clamp assembly  500  is integrated with additional fasteners, such as the fastener  419 , to compress the cooling chassis  111  against the modular heat frame, i.e., the internal fixed chassis frame  403 , via the connector  520 . The connector  520  includes a first extending portion  521   a , a second extending portion  521   b , a first groove  523   a , a second groove  523   b , and a bridge  525 . The bridge  525  is an extension provided between the first extending portion  521   a  and the second extending portion  521   b  and, when mounted on the cooling chassis  111 , is provided perpendicular to both cooling chassis  111  in the conduction cooling chassis. The first extending portion  521   a  extends into the groove  515  of the first clamp  501 , the second extending portion  521   b  extends into the groove of the second clamp  503 , the first extending portion  511  of the first clamp  501  extends into the first groove  523   a , and the first extending portion  511  of the second clamp  503  extends into the second groove  523   b.    
     As described in greater detail below in the description of  FIGS.  7 A and  7 B , the conduction cooling chassis includes a first cooling chassis  111  and a second cooling chassis  111 . In some implementations, the first cooling chassis  111  and second cooling chassis  111  are referred to as a left cooling chassis and a right cooling chassis. The bridge  525  extends across and perpendicular to each of the left cooling chassis and the right cooling chassis. The first clamp  501  is provided external to the right cooling chassis and the second clamp  503  is provided external to the left cooling chassis. In some implementations, the first clamp  501  and the second clamp  503  are provided internal of a right fixed chassis exterior wall  401  and internal of a left fixed chassis exterior wall  401 , respectively. In other implementations, the first clamp  501  and the second clamp  503  are provided external of a right fixed chassis exterior wall  401  and external of a left fixed chassis exterior wall  401 , respectively. When the fastener(s)  419  are tightened, the connector  520  provides a stabilizing force as the respective left and right cooling chassis  111  are compressed toward the respective internal fixed chassis frame  403 . As described above, the fastener  419  can be a spring loaded screw that, when tightened to the specified torque value, compresses the cooling chassis  111  against the internal fixed chassis frame  403 . The compression forms a tight thermal bond while still allowing a processing module  119  to be removed when the rail clamp assembly  500 , or another clamping mechanism used in another implementation, is loosened. 
     In some implementations, the rail clamp assembly  500  is integrated into a cover that traverses an entire side of a conduction cooling chassis, such as the mil-aero conduction cooling chassis  700  illustrated in  FIGS.  7 A and  7 B . For example, the first clamp  501  and the second clamp  503  can be extended to be equal or approximately equal to a length of the cooling chassis  111  and/or the fixed chassis exterior wall  401  and the connector  520  is extended to be a length equal to or approximately equal to the lengths of the first clamp  501  and the second clamp  503 . 
     In other implementations, the conduction cooling chassis includes a plurality of rail clamp assemblies  500 . In other words, the conduction cooling chassis can include a first rail clamp assembly  500  at a first end of the cooling chassis  111 , a second rail clamp assembly  500  at a second end of the cooling chassis  111 , and a third rail clamp assembly  500  between the first and second rail clamp assemblies. Although described herein as including three rail clamp assemblies, various implementations are possible. It should be understood that any number of rail clamp assemblies, including more or less than three, can be used to provide a clamping force in the conduction cooling chassis. 
     In some implementations, the rail clamp assembly  500  is included in part of a separate cover for a mil-aero conduction cooling chassis  700 , described in greater detail below. For example, the connector  520  can be a panel in a cover that is placed on the mil-aero conduction cooling chassis  700 . 
       FIG.  6 A  illustrates a perspective view of the heat frame sidewall according to various implementations of the present disclosure.  FIG.  6 B  illustrates a side view of the heat frame sidewall according to various implementations of the present disclosure. The example of the heat frame sidewall  600  is presented for illustration only and should not be construed as limiting. It should be understood that in the perspectives of the heat frame sidewall  600  illustrated in  FIGS.  6 A and  6 B , the cooling fins and heat pipes are not shown for ease of illustration. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more heat frame sidewalls  600  having different shapes, sizes, configurations, and so forth. 
     The heat frame sidewall  600  includes a first portion  601 , a second portion  603 , an extension  605  between the first portion  601  and the second portion  603 , and a base  611 . In some implementations, as shown in  FIG.  6 B , the extension  605  does not extend along the entire heat frame sidewall  600 . In other implementations, the extension  605  extends along the entire heat frame sidewall  600 . 
     In some implementations, the heat frame sidewall  600  is any one of the extensions  203   a - 203   n  of the cooling chassis  111 . For example, the front face  413  of the cooling chassis  111  is the first face  607  and the rear face  415  of the cooling chassis is the second face  609 . As illustrated in  FIGS.  4 A and  4 B , the gasket  409  creates a seal along the base  611  when the cooling chassis  111  is pressed into contact with the internal fixed chassis frame  403 , as shown in greater detail in  FIG.  7 B . 
     The present disclosure recognizes and takes into account the challenges faced by metal to metal interfaces. At a microscopic level, metal to metal interfaces are full of surface irregularities, which form air pockets that reduce the thermal transfer effectiveness of the interface. To address this, a thermal interface material, such as a thermal grease, can be applied to fill the air pockets and enhance thermal conduction from one solid surface to another. However, in some environments, grease or other semi-solid thermal interfaces are not viable solutions for surfaces that may require periodic maintenance. 
     In some implementations, the first portion  601  and the second portion  603  include a thermal interface material to enhance thermal performance of the heat frame sidewall  600 . In other implementations, the first portion  601  and the second portion  603  are bonded to a thermal interface material, rather than the thermal interface material being included. The thermal interface material can be a soft metal alloy that enables a tight thermal bond when part of an interface, while still allowing the first portion  601  and the second portion  603  to be removed from the interface for maintenance. 
       FIG.  7 A  illustrates an exploded view of a mil-aero conduction cooling chassis according to various implementations of the present disclosure.  FIG.  7 B  illustrates a perspective view of the mil-aero conduction cooling chassis according to various implementations of the present disclosure. The example of the mil-aero conduction cooling chassis  700  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more mil-aero conduction cooling chassis  700  having different shapes, sizes, configurations, and so forth. 
     The mil-aero conduction cooling chassis  700  comprises four exterior walls including a first wall  701 , a second wall  703 , a third wall  705 , and a fourth wall  717 . As shown in the perspective of  FIG.  7 B , the first wall  701  can be referred to as a back wall, the second wall  703  can be referred to as a left side wall, the third wall  705  can be referred to as a front wall, and the fourth wall  707  can be referred to as a right side wall. However, the terms front, back, left, right, and side are merely for illustration and ease of description only. Based on the perspective from which the mil-aero conduction cooling chassis  700  is viewed, the front wall can appear to be the back wall, the left side can appear to be the right side, and so forth. 
     In some implementations, each of the first wall  701 , second wall  703 , third wall  705 , and fourth wall  707  are separate walls that are coupled together by one or more fastening means. For example, the first wall  701  can be coupled to the second wall  703  and the fourth wall  707  via an adhesive, one or more screws, one or more clamps, or any other suitable coupling means to maintain a connection between the various exterior walls. In the same or similar manner, the second wall  703  is coupled to the first wall  701  and the third wall  705 , the third wall  705  is coupled to the second wall  703  and the fourth wall  707 , and the fourth wall  707  is coupled to the third wall  705  and the first wall  701 . In other implementations, the first wall  701 , second wall  703 , third wall  705 , and fourth wall  707  are a single component that is cast, molded, welded, or otherwise produced as a single component. 
     In some implementations, the first wall  701 , second wall  703 , third wall  705 , and fourth wall  707  form a square frame. In In some implementations, the first wall  701 , second wall  703 , third wall  705 , and fourth wall  707  form a rectangular frame. In some implementations, the second wall  703  and the fourth wall  707  are each implementations of the fixed chassis exterior wall  401 . 
     The second wall  703  includes a first air duct  709 . The fourth wall  707  includes a second air duct  711 . The first air duct  709  and the second air duct  711  are configured to enable air flow to enter or exit the mil-aero conduction cooling chassis  700 . The third air duct  713  is configured to either pull or push forced air into the cooling chassis  700 . In implementations where one or more processing modules are inserted into the mil-aero conduction cooling chassis  700 , the air flowing through space  729  and space  727  absorbs heat from the heat frame, fins, and chassis cooling wall; thereby cooling the processing modules. In some implementations, the first wall  701  includes a third air duct  713 . The third air duct  713  is configured to provide additional air flow into or out of the mil-aero conduction cooling chassis  700 . 
     The mil-aero conduction cooling chassis  700  further includes a rear plenum  715 . It should be understood that the term rear is for illustration and description only. In implementations where the mil-aero conduction cooling chassis  700  is viewed from a perspective different than the perspective illustrated in  FIGS.  7 A and  7 B , the rear plenum  715  can be seen on a side or front of the mil-aero conduction cooling chassis  700 . The rear plenum  715  is an internal frame of the mil-aero conduction cooling chassis  700  and provides additional structure and stability to the mil-aero conduction cooling chassis  700 . A space  725  is provided between the first wall  701  and the rear plenum  715  that facilitates air flow into or out of the mil-aero conduction cooling chassis  700 . The rear plenum  715  includes a first plenum duct  717   a  that enables air flow into or out of and a space  729  and a second plenum duct  717   b  that enables air flow into or out of a space  727 . 
     The mil-aero conduction cooling chassis  700  further includes a first cooling chassis  719   a  and a second cooling chassis  719   b . Each of the first cooling chassis  719   a  and the second cooling chassis  719   b  can be the cooling chassis  111 . The first cooling chassis  719   a  is provided proximate to the second wall  703  and separated from the second wall  703  by the space  729 . The second cooling chassis  719   b  is provided proximate to the fourth wall  707  and separated from the fourth wall  707  by the space  727 . In some implementations, each of the space  727  and the space  729  are the channel  411  described in greater detail above. 
     The mil-aero conduction cooling chassis  700  further includes a first internal fixed chassis frame  721   a  and a second internal fixed chassis frame  721   b . Each of the first internal fixed chassis frame  721   a  and the second internal fixed chassis frame  721   b  can be the internal fixed chassis frame  403 . The first internal fixed chassis frame  721   a  is provided proximate to the first cooling chassis  719   a  and the second internal fixed chassis frame  721   b  is provided proximate the second cooling chassis  719   b  (not pictured in  FIG.  7 B ). In some implementations, the first internal fixed chassis frame  721   a  is clamped to the first cooling chassis  719   a  and the second internal fixed chassis frame  721   b  is clamped to the second cooling chassis  719   b  via a rail clamp assembly, for example the rail clamp assembly  500  illustrated in  FIGS.  5 A and  5 B  and described above. 
     Each of the first internal fixed chassis frame  721   a  and the second internal fixed chassis frame  721   b  include a gasket  723 . The gasket  723  can be the gasket  409 . The gasket  723  enables the first internal fixed chassis frame  721   a  to create a seal when clamped to the first cooling chassis  719   a  and enables the second internal fixed chassis frame  721   b  to create a seal when clamped to the second cooling chassis  719   b.    
     In some implementations, the mil-aero conduction cooling chassis  700  includes a mounting space  731  configured to receive one or more processing device, such as the processing device  100 . For example, the processing device  100  can be mounted within the mounting space  731  such that the processing device  100  is provided within the mounting space  731 , one heat frame  101  is provided in the space  729 , and another heat frame is provided in the space  727 . In some implementations, the mounting space  731 , the space  727 , and the space  729  are of a suitable size to accommodate a plurality of processing devices  100  of varying sizes and/or shapes. 
     In implementations where one or more processing modules is mounted within the mounting space  731  of the mil-aero conduction cooling chassis  700 , the first air duct  709 , second air duct  711 , and the third air duct  713  provide multiple configurations to enable air flow to cool the mounted one or more processing modules. In one implementation, air can enter the mil-aero conduction cooling chassis  700  via the third air duct  713  to the space  725  between the first wall  701  and the rear plenum  715 . From the space  727 , the air can flow into one or both of i) the space  727  between the cooling chassis  719   b  and the fourth wall  707  via the second plenum duct  717   b , and ii) the space  729  between the cooling chassis  719   a  and the second wall  703  via the first plenum duct  717   a . From the space  727 , the air flows out of the mil-aero conduction cooling chassis  700  via the second air duct  711 . From the space  729 , the air flows out of the mil-aero conduction cooling chassis  700  via the first air duct  709 . In another implementation, air can enter the mil-aero conduction cooling chassis  700  via one or both of the first air duct  709  and the second air duct  711  to the space  729  and the space  727 , respectively. The air can flow through the space  729 , passing over a plurality of fins coupled to the processing module to cool the mounted processing module, and through the first plenum duct  717   a  to the space  725 . Likewise, the air can flow through the space  727 , passing over a plurality of fins coupled to the processing module to cool the mounted processing module, and through the second plenum duct  717   b  to the space  725 . 
       FIG.  8 A  illustrates a perspective view of a processing device according to various implementations of the present disclosure.  FIG.  8 B  illustrates a front view of a processing device according to various implementations of the present disclosure. The example of the processing device  800  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more processing devices  800  having different shapes, sizes, configurations, and so forth. 
     The processing device  800  includes a first heat frame  801   a , a second heat frame  801   b , a heat frame connecting portion  809 , and a processing module  815 . The first and second heat frame  801   a ,  801   b  can be the heat frame  101  as described in greater detail above. For example, the first heat frame  801   a  includes a frame  803   a , a plurality of fins  805   a  corresponding to the plurality of fins  103   a - 103   n , and a plurality of heat pipes  807   a  corresponding to the plurality of heat pipes  107   a - 107   n . Likewise, the second heat frame  801   b  includes a frame  803   b , a plurality of fins  805   b  corresponding to the plurality of fins  103   a - 103   n , and a plurality of heat pipes  807   b  corresponding to the plurality of heat pipes  107   a - 107   n . The first heat frame  801   a  is coupled to a first side of the processing module  815  and the second heat frame  801   b  is coupled to a second side of the processing module  815 , opposite the first side. 
     The heat frame connecting portion  809  is provided between the first heat frame  801   a  and the second heat frame  801   b  and is an extension of the frame  803   a  and the frame  803   b . The heat frame connecting portion  809  is provided on a third side of the processing module  815 . In some implementations, due to the connection between the frame  803   a  and the frame  803   b  via the heat frame connection portion  809 , the first heat frame  801   a , second heat frame  801   b , and the heat frame connecting portion  809  are referred to collectively as a heat frame module. The heat frame connecting portion  809  further includes an extending portion  811   a  that creates a first pair of slots  812   a ,  812   b  and an extending portion  811   b  that creates a second pair of slots  812   c ,  812   d . The first pair of slots  812   a ,  812   b  and the second pair of slots  812   c ,  812   d  provide a space for respective extensions of the cooling chassis  111  to extend in implementations where the processing device  800  is installed in a mil-aero conduction cooling chassis, as illustrated in  FIG.  9    and described in greater detail below. In some implementations, where the first heat frame  801   a  of the processing device  800  is installed on the cooling chassis  111 , the first heat frame  801   a  can be installed in any of the one or more slots  205   a ,  205   b ,  205   n  provided between each of the extensions  203   a ,  203   b ,  203   c ,  203   n . For example, the first heat frame  801   a  can be installed in the slot  205   a . The first extension  203   a  is extended through the slot  812   b  and the second extension  203   b  is extended through the slot  812   a . A similar configuration enables the second heat frame  801   b  to be installed on a separate cooling chassis, for example where the second heat frame  801   b  is installed in the slot  205   a , the first extension  203   a  is extended through the slot  812   c  and the second extension  203   b  is extended through the slot  812   d.    
     The processing module  815  can be the processing module  119  illustrated in  FIG.  1   . As described above in the description of  FIG.  1   , the processing module  815  can be any type of processing module that utilizes cooling as described herein. In some implementations, the processing module  119  is a VPX card. In some implementations, the processing module  119  includes a central processing unit (CPU), a graphics processing unit (GPU), or any other high-powered processing unit or card. The processing module  119  can be used for any type of computer processing known to one of skill in the art, for example military applications, aerospace applications, security applications, various commercial applications, various communications applications, and so forth. 
     The processing module  815  is installed between the first heat frame  801   a  and the second heat frame  801   b . In some implementations, the processing module  815  is referred to as mounted to the heat frame connecting portion  809  between the first heat frame  801   a  and the second heat frame  801   b . The processing device  800  further includes a connector  817 , provided on a fourth side of the processing module  815  opposite the third side, to connect the processing module  815  to the mil-aero conduction cooling chassis  700 . In implementations where the processing module  815  is a VPX card, the connector  817  is a VPX connector that connects the VPX card to the mil-aero conduction cooling chassis  700 . 
     In some implementations, the processing device  800  further includes one or more ejector handles, such as the ejector handles  813   a ,  813   b  to release the processing module  815  from the mil-aero conduction cooling chassis  700 . For example, the ejector handles  813   a ,  813   b  can be mechanical levers that, when pulled, release the processing module  815  from the mil-aero conduction cooling chassis  700 . 
       FIG.  9    illustrates a mil-aero conduction cooling chassis according to various implementations of the present disclosure. The example of the mil-aero conduction cooling chassis  900  is presented for illustration only and should not be construed as limiting. Other implementations may be used without departing from the scope of the present disclosure. For example, the present disclosure contemplates one or more mil-aero conduction cooling chassis  900  having different shapes, sizes, configurations, and so forth. 
       FIG.  9    illustrates the mil-aero conduction cooling chassis  900  that includes the processing device  800  mounted into the mil-aero conduction cooling chassis  700  previously illustrated in  FIGS.  7 A and  7 B . The processing module  815  and connector  817  are mounted in the mounting space  731 , the first heat frame  801   a  is mounted in the space  729 , and the second heat frame  801   b  is mounted in the space  727 . For ease of illustration and description, only one processing device  800  is illustrated as mounted in the mil-aero conduction cooling chassis  700 . However, various implementations are possible. One or more additional processing devices  800  can be mounted in additional slots in the cooling chassis  719   a ,  719   b  that are between the processing device  800  and the rear plenum  715  and one or more additional processing devices  800  can be mounted in additional slots in the cooling chassis  719   a ,  719   b  that are between the processing device  800  and the third wall  705 . 
     As described herein, the cooling chassis  111  is movable between the internal fixed chassis frame  403  and the fixed chassis exterior wall  401 . In other words, the first cooling chassis  719   a  is movable between the second wall  703  and the first internal fixed chassis frame  721   a  and the second cooling chassis  719   b  is movable between the fourth wall  707  and the second internal fixed chassis frame  721   b  in order to provide support and stability to the one or more processing devices  800  mounted in the mil-aero conduction cooling chassis  700 . In some implementations, the first cooling chassis  719   a  and the second cooling chassis  719   b  are moved toward the first internal fixed chassis frame  721   a  and the second internal fixed chassis frame  721   b , respectively, via the tightening of the rail clamp assembly  500 . For example, the connector  520  can be provided lengthwise across the mil-aero conduction cooling chassis  900  perpendicular to the first cooling chassis  719   a  and the second cooling chassis  719   b . The first clamp  501  is provided on the first cooling chassis  719   a  and the second clamp  503  is provided on the second cooling chassis  719   b . The fasteners  419  can then be tightened on the connector  520  to compress the first cooling chassis  719   a  toward the first internal fixed chassis frame  721   a  and the second cooling chassis  719   b  toward the second internal fixed chassis frame  721   b . The fasteners  419  are tightened within mechanical torque specifications to provide sufficient support, without over-tightening, for the first cooling chassis  719   a  and the second cooling chassis  719   b.    
     In some implementations, each of the first cooling chassis  719   a  and the second cooling chassis  719   b  move less than ten millimeters to provide the support and stability to the one or more processing devices  800 . In some implementations, each of the first cooling chassis  719   a  and the second cooling chassis  719   b  move less than five millimeters to provide the support and stability to the one or more processing devices  800 . In some implementations, each of the first cooling chassis  719   a  and the second cooling chassis  719   b  move less than two millimeters to provide the support and stability to the one or more processing devices  800 . 
     The implementation of the mil-aero conduction cooling chassis  900  illustrated in  FIG.  9    provides a stable, rugged solution for conduction cooling of the one or more processing devices  800 . For example, the mil-aero conduction cooling chassis  900  minimizes the unwanted air or dust particles from entering the mil-aero conduction cooling chassis  900  while enabling improved conduction cooling of the one or more processing devices. 
       FIG.  10    illustrates a flowchart diagram illustrating a workflow for cooling one or more processing devices according to various implementations of the present disclosure. The method  1000  can be executed by one or more component described herein, such as the mil-aero conduction cooling chassis  900 . 
     The method  1000  may be implemented by the mil-aero conduction cooling chassis  900 , i.e., the one or more processing devices  800  mounted in the mil-aero conduction cooling chassis  700 . In some implementations, the method  1000  also utilizes additional components of the mil-aero conduction cooling chassis described herein, such as the rail clamp assembly  500 . 
     The method  1000  begins by providing a mil-aero conduction cooling chassis, such as the mil-aero conduction cooling chassis  700 , in step  1001 . In step  1003 , one or more processing devices, such as the processing device  800 , is mounted, or inserted, into the mil-aero conduction cooling chassis  700 . For example, processing module  815  and connector  817  are mounted in the mounting space  731 , the first heat frame  801   a  is mounted in the space  729 , and the second heat frame  801   b  is mounted in the space  727 . 
     In step  1005 , the one or more processing devices  800  are locked into place in the mil-aero conduction cooling chassis  700  via the rail clamp assembly  500 . For example, as described herein, the fasteners  419  are tightened on the connector  520  to compress the first cooling chassis  719   a  toward the first internal fixed chassis frame  721   a  and the second cooling chassis  719   b  toward the second internal fixed chassis frame  721   b . In some implementations, a separate cover is attached to the mil-aero conduction cooling chassis  900  to provide additional support and/or prevent foreign particles from being introduced into the mil-aero conduction cooling chassis  900 . In some implementations, the rail clamp assembly  500  is included as part of the cover. In some implementations, a plurality of rail clamp assemblies  500  are utilized to lock the one or more processing devices  800  into place in the mil-aero conduction cooling chassis  700 . 
     In step  1007 , airflow is introduced into mil-aero conduction cooling chassis  900  to cool the one or more processing devices  800 . For example, air is introduced into mil-aero conduction cooling chassis  900  that flows over the plurality of fins  805   a ,  805   b . The cooling of the plurality of fins  805   a ,  805   b  in turn cools the particular processing device  800  coupled to the plurality of fins  805   a ,  805   b.    
     In step  1009 , it is determined whether the one or more processing devices  800  have been sufficiently cooled by the airflow. In some implementations, the determination is made by the one or more processing devices  800 . In some implementations, the determination is made by an external device that measures a temperature of the one or more processing devices  800 . In implementations where the one or more processing devices  800  are determined to be sufficiently cooled, the method  1000  terminates. In implementations where the one or more processing devices  800  are determined to be sufficiently cool, step  1007  is repeated until, in step  1009 , it is determined that the one or more processing devices  800  are sufficiently cooled. 
     In some implementations, one processing device  800  may be determined to be sufficiently cool while one processing device  800  may be determined to not be sufficiently cool. In these implementations, step  1007  is repeated until all of the processing devices  800  are determined to be sufficiently cool. 
       FIG.  11    illustrates a schematic perspective view of an aircraft having one or more portions controlled by a processing device stored and cooled in a mil-aero conduction cooling chassis as described herein. The aircraft  1200  includes a wing  1102  and a wing  1104  attached to a body  1106 . The aircraft  1100  also includes an engine  1108  attached to the wing  1102  and an engine  1110  attached to the wing  1104 . The body  1106  has a tail section  1112  with a horizontal stabilizer  1114 , a horizontal stabilizer  1116 , and a vertical stabilizer  1118  attached to the tail section  1112  of the body  1106 . The body  1106  in some implementations has a composite skin  1120 . 
     The aircraft  1100  is an example of an aircraft  1100  including one or more components controlled by the processing device  800  mounted in the mil-aero conduction cooling chassis  900  described herein. For example, various software and software applications executed by the aircraft  1100  can be controlled by the one or more processing devices  800 . 
     The illustration of the aircraft  1200  is not meant to imply physical or architectural limitations to the manner in which an illustrative configuration may be implemented. For example, although the aircraft  1200  is a commercial aircraft, the aircraft  1200  can be a military aircraft, a rotorcraft, a helicopter, an unmanned aerial vehicle, or any other suitable aircraft. Other vehicles are possible as well, such as, for example but without limitation, an automobile, a motorcycle, a bus, a boat, a train, or the like. 
     The following clauses describe further aspects of the present disclosure. In some implementations, the clauses described below can be further combined in any sub-combination without departing from the scope of the present disclosure. 
     Clause Set A: 
     A1: A heat frame, comprising: 
     a plurality of fins; and 
     at least one heat pipe extending through a hole provided in each of the plurality of fins, 
     wherein the heat frame is coupled to a cooling chassis. 
     A2: The heat frame of A1, wherein the plurality of fins are provided parallel to the cooling chassis. 
     A3: The heat frame of A1, wherein the plurality of fins are comprised of at least one of copper or aluminum. 
     A4: The heat frame of A1, wherein the at least one heat pipe is configured to contain a gaseous material configured to cool a processing device connected to the heat frame. 
     A5: The heat frame of A1, wherein: 
     the plurality of fins extend in a first direction parallel to the cooling chassis, and 
     the at least one heat pipe is provided in a second direction perpendicular to the first direction. 
     A6: The heat frame of A5, wherein the at least one heat pipe is configured to cool air flowing in the first direction. 
     A7: The heat frame of A1, wherein: 
     the heat frame is coupled to a processing module, and 
     a junction of the heat frame and the processing module is provided at a slot in the cooling chassis. 
     Clause Set B: 
     B1: A processing device, comprising: 
     a processing module; and 
     a first heat frame coupled to a first side of the processing module, 
     a second heat frame coupled to a second side of the processing module, 
     wherein each of the first heat frame and the second heat frames comprises: 
     a plurality of fins, each fin of the plurality of fins including at least one hole, wherein each fin of the plurality of fins is parallel to every other fin; and 
     at least one heat pipe extending through the hole provided in each of the plurality of fins. 
     B2: The processing device of B1, wherein the first side is opposite of the second side. 
     B3: The processing device of B1, further comprising: 
     a heat frame connecting portion coupled to each of the first heat frame and the second heat frame, 
     wherein the heat frame connecting portion is provided on a third side of the processing module. 
     at least one ejector handle configured to remove the processing module from a connecting point. 
     B4: The processing device of B3, wherein the processing module further comprises: 
     a connector configured to connect the processing module to a conduction cooling chassis, 
     wherein the connector is provided on a fourth side of the processing module, opposite the third side. 
     B5: The processing device of B4, wherein the heat frame connecting portion further comprises: 
     at least one ejector handle configured to release the connector from the conduction cooling chassis. 
     Clause Set C: 
     C1: A conduction cooling chassis, comprising: 
     a processing device, comprising: 
     a first heat frame, 
     a second heat frame, and 
     a processing module provided between the first heat frame and the second heat frame; 
     a first cooling chassis and a second cooling chassis, each of the first cooling chassis and the second cooling chassis comprising: 
     a first wall, 
     a second wall, and 
     a slot provided between the first wall and the second wall, wherein a junction between the first heat frame and the processing module is provided in the slot of the first cooling chassis and a junction between the second heat frame and the processing module is provided in the slot of the second cooling chassis. 
     C2: The conduction cooling chassis of C1, wherein each of the first heat frame and the second heat frame comprises: 
     a plurality of fins, each fin of the plurality of fins including at least one hole, wherein each fin of the plurality of fins is parallel to every other fin; and 
     at least one heat pipe extending through the hole provided in each of the plurality of fins. 
     C3: The conduction cooling chassis of C2, further comprising: 
     a first internal fixed chassis frame provided adjacent to the first heat frame, and 
     a second internal fixed chassis frame provided adjacent to the second heat frame. 
     C4: The conduction cooling chassis of C3, further comprising: 
     a rail clamp assembly including: 
     a first rail clamp provided on the first cooling chassis, the first rail clamp including a first fastener, 
     a second rail clamp provided on the second cooling chassis, the second rail clamp including a second fastener, and 
     a bridge provided between the first rail clamp and the second rail clamp. 
     C5: The conduction cooling chassis of C4, wherein: 
     the first fastener and the second fastener are configured to provide an inward pressure on the bridge, and 
     the inward pressure causes the first cooling chassis to move toward the first internal fixed chassis frame and the second cooling chassis to move toward the second internal fixed chassis frame. 
     C6: The conduction cooling chassis of C3, further comprising: 
     a first external fixed chassis frame provided adjacent to the first cooling chassis, wherein the first cooling chassis is provided between the first external fixed chassis frame and the first internal fixed chassis frame; 
     a first space between the first cooling chassis and the first external fixed chassis frame; 
     a second external fixed chassis frame provided adjacent to the second cooling chassis, wherein the second cooling chassis is provided between the second external fixed chassis frame and the second internal fixed chassis frame; and 
     a second space between the second cooling chassis and the second external fixed chassis frame. 
     C7: The conduction cooling chassis of C6, wherein: 
     the first external fixed chassis frame includes a first air duct configured to enable airflow to the first space; and 
     the second external fixed chassis frame includes a second air duct configured to enable airflow to the second space. 
     C8: The conduction cooling chassis of C7, wherein: 
     the airflow in the first space is configured to cool the plurality of fins of the first heat frame, 
     the airflow in the second space is configured to cool the plurality of fins of the second heat frame, and 
     the cooled plurality of fins of the first heat frame and the cooled plurality of fins of the second heat frame is configured to cool the processing module. 
     Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims. 
     It will be understood that the benefits and advantages described above may relate to one implementation or may relate to several implementations. The implementations are not limited to those that solve any or all of the stated problems or those that have any or all of the stated benefits and advantages. It will further be understood that reference to ‘an’ item refers to one or more of those items. 
     The term “comprising” is used in this disclosure to mean including the feature(s) or act(s) followed thereafter, without excluding the presence of one or more additional features or acts. 
     In some implementations, the operations illustrated in the figures may be implemented as software instructions encoded on a computer readable medium, in hardware programmed or designed to perform the operations, or both. For example, aspects of the disclosure may be implemented as an ASIC, SoC, or other circuitry including a plurality of interconnected, electrically conductive elements. 
     The order of execution or performance of the operations in implementations of the disclosure illustrated and described herein is not essential, unless otherwise specified. That is, the operations may be performed in any order, unless otherwise specified, and implementations of the disclosure may include additional or fewer operations than those disclosed herein. For example, it is contemplated that executing or performing a particular operation before, contemporaneously with, or after another operation is within the scope of aspects of the disclosure. 
     When introducing elements of aspects of the disclosure or the examples thereof, the articles “a,” “an,” “the,” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. The term “exemplary” is intended to mean “an example of” The phrase “one or more of the following: A, B, and C” means “at least one of A and/or at least one of B and/or at least one of C.” 
     Having described aspects of the disclosure in detail, it will be apparent that modifications and variations are possible without departing from the scope of aspects of the disclosure as defined in the appended claims. As various changes could be made in the above constructions, products, and methods without departing from the scope of aspects of the disclosure, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. 
     It is to be understood that the above description is intended to be illustrative, and not restrictive. As an illustration, the above-described implementations (and/or aspects thereof) are usable in combination with each other. In addition, many modifications are practicable to adapt a particular situation or material to the teachings of the various implementations of the disclosure without departing from their scope. While the dimensions and types of materials described herein are intended to define the parameters of the various implementations of the disclosure, the implementations are by no means limiting and are exemplary implementations. Many other implementations will be apparent to those of ordinary skill in the art upon reviewing the above description. The scope of the various implementations of the disclosure should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects. Further, the limitations of the following claims are not written in means-plus-function format and are not intended to be interpreted based on 35 U.S.C. § 112(f), unless and until such claim limitations expressly use the phrase “means for” followed by a statement of function void of further structure. 
     This written description uses examples to disclose the various implementations of the disclosure, including the best mode, and also to enable any person of ordinary skill in the art to practice the various implementations of the disclosure, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the various implementations of the disclosure is defined by the claims, and includes other examples that occur to those persons of ordinary skill in the art. Such other examples are intended to be within the scope of the claims if the examples have structural elements that do not differ from the literal language of the claims, or if the examples include equivalent structural elements with insubstantial differences from the literal language of the claims. 
     Although the present disclosure has been described with reference to various implementations, various changes and modifications can be made without departing from the scope of the present disclosure.