Modular 2D cooling system design

Abstract

A two-dimensional liquid cooling system for a data center. A horizontal assembly is located above an IT cluster and serves as a primary cooling unit. A vertical unit is located next to several IT clusters and is connected to several horizontal units and can be used as a backup for any cluster or to enhance the cooling performance of any cluster. The horizontal assembly includes a cooling module having a cooling unit, a coolant module that receives cooling liquid from the cooling unit and provides cooling liquid to a distribution layer, the distribution layer including a supply loop and a return loop. The vertical unit is connected to multiple supply loops and return loops to provide cooling liquid to multiple clusters. The cooling system and the entire data center are modularized in different configurations.

Description

Technical Field

[0001] Embodiments of the present invention generally relate to systems for data center cooling. More specifically, embodiments of the present invention relate to modular, resilient, and efficient liquid cooling systems. Background Art

[0002] Cooling is a prominent factor in the design of computer systems and data centers. In addition to the cooling of data center equipment, modern high-performance processors and IT equipment require effective heat removal and pre-cooling systems. Heat removal from the processor can be improved by using liquid cooling. The current implementation of liquid cooling involves liquid cooling facilities designed and built specifically for a specific data center. Then, chilled water pipes transport chilled water from the equipment room to the server room and are connected to various manifolds to distribute the liquid to the cooling circuit. This approach has several disadvantages. First, each system must be redesigned specifically for each new data center. Secondly, facilities are established to provide cooling to the entire data center. However, initially the data center may not be fully filled with servers, so most of the facilities cannot be fully utilized before the data center is fully filled. Third, once the facilities are established, it is difficult and expensive to modify and / or upgrade them. Finally, when a failure occurs, it may result in the need to take some servers offline.

[0003] Therefore, there is a need for a liquid cooling solution that is effective, resilient, and reliable while providing high performance. Additionally, the solution should be easy to deploy and maintain while reducing acquisition and ownership costs.

[0004] Modularity is an effective method for building and designing data centers, which include IT clusters, power and cooling systems. Effective modular design for liquid cooling systems can significantly benefit data center designers and developers. Modular cooling systems can be designed to be universal and suitable for different data centers and IT clusters, so that designers only need to select the appropriate parts of the modular cooling system to fit a specific data center. This approach also enables the system to be built and tested in a factory before being shipped to the site, and can be quickly assembled on site in a plug-and-play manner. Summary of the invention

[0005] According to one aspect of the present application, a two-dimensional liquid cooling system for a data center is provided. The two-dimensional liquid cooling system for a data center may include:

[0006] A horizontal component is configured to be located on the server cluster, the horizontal component comprising:

[0007] providing at least one cooling module with a first cooling liquid;

[0008] a coolant module; and

[0009] Allocation module;

[0010] a vertical assembly configured to be located on a side adjacent to the server cluster and to provide a third cooling liquid;

[0011] wherein the coolant module is fluidly coupled to the cooling module and the distribution module, and receives the first coolant from the cooling module, and provides a second coolant to the distribution module;

[0012] wherein the distribution module is fluidly coupled to the vertical assembly and receives the third coolant from the vertical assembly; and

[0013] The distribution module includes a plurality of branch connectors, which are connected to the server cluster and selectively provide the second coolant and the third coolant to the server cluster.

[0014] According to another aspect of the present application, a data center system is provided, which may include:

[0015] a plurality of clusters, each cluster comprising a server cooling system for cooling a plurality of server racks;

[0016] a plurality of horizontal cooling assemblies, each horizontal cooling assembly being mounted on one of the clusters and supplying primary coolant to a corresponding server cooling system; and

[0017] A vertical cooling assembly is mounted adjacent to the plurality of clusters and provides auxiliary cooling fluid to a server cooling system of each of the plurality of clusters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings in which like references indicate similar elements.

[0019] Figure 1 is a schematic diagram showing an example of a prior art data center with liquid cooling.

[0020] Figure 2A is a schematic diagram showing the overall structure of a liquid cooling system installed in a data center, and Figure 2B is a detailed diagram of a mode of a system according to an embodiment.

[0021] Figure 3 is a schematic diagram showing a top view of a main cooling module and a vertical cooling module according to an embodiment.

[0022] Figure 4 is a simplified schematic diagram illustrating a dispensing module according to an embodiment.

[0023] Figure 5 is a simplified schematic diagram showing another version of a dispensing module according to another embodiment.

[0024] Figure 6 is a schematic diagram showing yet another version of the allocation module according to an embodiment.

[0025] Figure 7 is a schematic diagram showing a top view of a cooling system in a data center according to an embodiment.

[0026] Figure 8 is a schematic diagram showing an example of a cooling system attached to two rows of IT clusters positioned back-to-back, according to an embodiment.

[0027] Fig. 9 is a flow chart illustrating a process according to an embodiment. DETAILED DESCRIPTION

[0028] Various embodiments and aspects of the present invention will be described with reference to the details discussed below, and the accompanying drawings will illustrate various embodiments. The following description and accompanying drawings are illustrative of the present invention and do not constitute a limitation of the present invention. Many specific details are described to provide a thorough understanding of various embodiments of the present invention. However, in some cases, in order to provide a concise discussion of embodiments of the present invention, known or conventional details are not described.

[0029] Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the invention. The phrase "in one embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment.

[0030] The present disclosure provides embodiments of a modular liquid cooling system for supporting IT clusters or IT containers filled with liquid-cooled IT equipment or liquid cooling units in the IT equipment. The design is modular because it is assembled from discrete units, each of which can be assembled and tested before being shipped to the site. Utilization is improved because the number of discrete cooling units can be the same as the number of IT clusters, and one backup unit can serve all clusters. In addition, the system is easily expandable as additional clusters are put into service by adding discrete cooling units accordingly.

[0031] Redundant design is critical to maintaining system uptime and reliability in order to ensure service level agreements (SLAs) for the corresponding businesses running on the servers. The disclosed embodiments provide innovative designs for redundancy with minimal equipment to reduce overall costs. In addition, redundant units provide additional features, such as serving as an enhanced cooling source in some cases.

[0032] When deploying liquid distribution for IT clusters, reliability is a key requirement. The possibility of cooling liquid leakage is a key challenge for many data center designers and developers. To eliminate this possibility, the disclosed embodiments provide a design where the main fluid distribution and fluid section are completely separated from the IT equipment without affecting performance and system operation.

[0033] As will be described in more detail below, the disclosed embodiments provide a two-dimensional cooling system. The system includes a horizontal component located on top of the IT cluster, and a vertical component located to the side of the IT cluster and adjacent to the IT cluster. This design provides redundancy and flexibility in the cooling arrangement. The entire system is built using a modular concept and includes one or more cooling modules, a coolant module, and a distribution module. These modules can be assembled into a unit or separated into separate modules. For different types of redundancy and cooling levels, the modules can operate in different modes.

[0034] The distribution module is connected to the horizontal cooling assembly and the vertical cooling assembly. The distribution module receives cooling fluid from both cooling assemblies and distributes the cooling fluid through the optional extension layer. The extension layer provides the functions required to connect the cooling loop to the IT racks and / or cooling units.

[0035] The system design enables flexible modular design and configuration, and can be effectively deployed for data center campuses of different sizes.

[0036] Figure 1 1 is a simplified schematic diagram showing an example of a prior art data center with liquid cooling equipment. A building 100 houses a data room 105 with multiple IT clusters 110, each with multiple server racks. A cooling liquid facility 115 is located outside of the data room 105 and may include some equipment, such as a cooling tower 120, which is located outside of the building 100. Various pipes and manifolds 125 deliver chilled water to the clusters 110 and return warm water from the clusters 110 to the facility 115.

[0037] Figure 2A2 is a schematic diagram showing a side view of the overall structure of a liquid cooling system according to an embodiment. As shown, IT racks 111 are located in a cluster within a server room 105 within a data center 100. Liquid cooling system 200 includes horizontal components 205 and vertical components 210. As will be described in more detail below, horizontal components 205 provide normal daily cooling operations, while vertical components 210 operate as backup, enhanced cooling operations, or replacements during maintenance of horizontal components, for example. Horizontal components 205 are used for one rack cluster or one rack container, while vertical components 210 can be used for several clusters or containers.

[0038] Figure 2B Shown in more detail Figure 2A The system shown in Figure 2B As shown, in this particular example, each of the server racks 111 includes an integrated heat exchanger 113, which requires a cooled liquid as a heat removal medium. The racks 111 can be integrated with the heat exchanger 113, which is a liquid-to-air cooling device or other type of cooling device, such as a liquid distribution manifold mounted on the rack. Other examples that may require cooling liquid include rear door coolers, row coolers, or rack liquid distribution manifolds. The cooled liquid can be provided by the horizontal assembly 205, the vertical assembly 210, or both, depending on the operating mode of the distribution module 215. The operating mode of the distribution module 215 is set by the position of the valve 217.

[0039] In this particular example, the horizontal assembly 205 consists of two cooling modules 220 and one coolant module 225. The coolant module 225 can be a chillerless system that delivers coolant liquid to the distribution module 215 and receives warm liquid back from the distribution module 215. In one example, the coolant module 225 includes an optional (indicated by dashed lines) liquid-liquid heat exchanger 252, where the liquid received from the cooling module 220 is used as a heat removal medium. In this way, there are two liquid loops, where the coolant module creates a separation between the liquid flowing in the cooling module 220 and the liquid flowing in the distribution module 215, and thus the liquid flowing in the heat exchanger 113. This enables different fluids to flow in the cooling module's circuits, and liquids to flow in the heat exchanger 113. Thus, for example, the liquid flow in the cooling module 220 can be formulated for maximum heat transfer, while the liquid flowing in the heat exchanger 113 can be formulated for maximum purity or more reliable and compatible with the wetted materials used in the circuit.

[0040] In another example, the coolant module 225 includes an optional fluid filtration system 254 that includes a pump, a liquid tank, a filtration system, and a control system. In this configuration, the coolant module receives liquid from a different cooling module 220 and performs additional processing on the liquid before delivering it to the distribution module 215. Therefore, in this arrangement, there is a single liquid loop from the cooling module 220 to the distribution module 215.

[0041] In another embodiment, the liquid-liquid heat exchanger 252 and the filtration system 254 may be packaged within the coolant module 225 and have different operating modes for different application purposes. Therefore, in order to distinguish the coolant flowing in the cooling module 220 and the liquid delivered by the coolant module 225 to the distribution module 215, the former may be referred to as the "first coolant" and the latter may be referred to as the "second coolant", which may or may not have the same composition. However, the use of the terms "first", "second", "primary", "secondary", etc. should not be interpreted as implying an order, priority, or hierarchy.

[0042] In the disclosed embodiments, the coolant module 225 and the cooling module 220 may be separate modules that may be assembled together on site, or combined / integrated modules that are shipped to site as a single unit.

[0043] The vertical cooling assembly 210 forms an independent cooling system serving several IT rack clusters 111. The vertical cooling assembly 210 includes a top module 212 having a liquid circuit directly connected to a distribution module 215. In one embodiment, the top module 212 may be similar to the coolant module 225 with an optional heat exchanger 256, while in another embodiment, the top module 212 may simply be a pump system 257 for supplying fluid to the distribution module 215. In order to distinguish the cooling liquid delivered by the vertical module 210 from the cooling liquid delivered by the horizontal module 205, it may be referred to as "tertiary cooling liquid". In this design, the second cooling liquid and the third cooling liquid delivered from the coolant module 225 are both delivered to the distribution module 215 and distributed to the racks by the distribution module 215, and the composition of the second cooling liquid and the third cooling liquid may be the same. However, thermal conditions such as temperature may be different.

[0044] The bottom module 214 forms a cooler, such as a cooling water system. The vertical cooling assembly 210 is typically used as a redundant or backup unit. In addition, the vertical cooling assembly 210 can be used to provide enhanced cooling when needed. In this sense, in the present disclosure, the second coolant delivered by the coolant module 225 can be referred to as the primary coolant, and the third coolant delivered by the vertical cooling assembly 210 can be referred to as the secondary coolant (the primary coolant and the secondary coolant can have the same composition). Typically, one vertical cooling assembly 210 serves several horizontal cooling assemblies 205.

[0045] Figure 3 A top view of the horizontal cooling assembly 205 and the vertical cooling assembly 210 is shown. In this figure, the coolant module 225 is located in the middle between the two cooling modules 220. The distribution module 215 is located below the cooling modules 220 and the coolant module 225. The modules are interconnected by liquid loops, each of which is pre-designed and pre-assembled in each of the modules and interconnected with other loops using standard interfaces or connection ports. The distribution module 215 can be customized with different sizes or different numbers of connection ports to serve the specific cooling system integrated with the rack 111. Figure 3 In the example of FIG. 1 , the cluster includes two rows of IT racks, where cooling modules 220 and coolant modules 225 serve both rows. In contrast, distribution modules 215 distribute liquid from coolant modules 225, vertical assemblies 210, or both to the IT racks. In other embodiments, the modules may be arranged in other configurations. Figure 3 As shown, each of the modules can be an independent unit connected to other units by fluid conduits, so that other arrangements can be made to suit a specific arrangement. In addition, the number and size of the units can be changed to suit any scale.

[0046] Figure 4 4 is a simplified schematic diagram showing a distribution module 215 according to an embodiment. The distribution module 215 includes a supply loop 414 that receives a coolant (i.e., a secondary coolant or a primary coolant) from the coolant module 225, and a return loop 416 that returns a warmed liquid to the coolant module 225. The supply loop and the return loop are connected to the coolant module 225 via a coupling 418, and are connected to the rack via a coupling 417. In addition, the supply loop 414 and the return loop 416 are connected to the vertical cooling module 210 via a coupling 419 (the direction of the arrows shows the input line and the output line) to receive the third coolant or the second coolant.

[0047] Figure 52 is a simplified schematic diagram showing another version of a distribution module according to another embodiment. In this embodiment, the distribution module 215 is composed of a loop layer 520 and an extension layer 530. The loop layer 520 accommodates the supply loop 414 and the return loop 416, and the extension layer accommodates the branch connector 417 for connecting the supply loop and the return loop to the rack 111. The extension layer 530 includes a port retainer 527, which is used to fix the branch connector 417 when the branch connector 417 is not connected to the rack 111. This feature can be used, for example, during transportation of the module to the assembly position, or for fixing unused branch connectors. In addition, the port retainer 527 may include an elastic component for applying a force when the branch connector 417 is disconnected from the rack 111 to retract the flexible hose of the branch connector 417. The extension layer 530 also includes a channel 535 for guiding the branch connector 417 to the rack 111. In one embodiment, section 520 and section 530 may be combined into one section, or separated into two sections.

[0048] Figure 6 Another embodiment of the distribution module 215 is shown. In this embodiment, the function of the ring layer 520 is the same as Figure 5 The example shown is the same. On the other hand, the extension layer 530 is divided into two compartments - a standard extension compartment 660 and a reinforced extension compartment 665. The standard extension compartment 660 and the reinforced extension compartment 665 are Figure 5 520, except that it is shorter than the entire length of the loop layer 520. The branch connector 417 of the standard extension layer 660 is similar to Figure 5 and directly connected to the supply loop 414 and the return loop 416. Figure 6 , the branch connector 417 is shown attached to the port holder 527 for transport.

[0049] The enhanced extension compartment 665 also includes branch connectors 417, but they are not directly connected to the supply circuit 414 and the return circuit 416. Instead, the branch connectors 417 are connected to the liquid-liquid heat exchanger 640 installed in the enhanced extension compartment 665. The cold side of the liquid-liquid heat exchanger 640 is connected to the supply circuit 414 and the return circuit 416 via a fluid connection 644 connected to a fluid port 642. In this regard, the fluid port 642 is a standard port that can be used to connect additional cooling equipment or configure additional heat transfer circuits. The cold side fluid connection can be pre-assembled for easy installation. The hot side is equipped with a flexible hose and a branch connector 417, which is used to connect to the rack through an open channel 535. The branch connector 417 of the enhanced extension compartment 665 is also shown connected to a port holder 527 for transportation.

[0050] According to actual usage, the enhanced extension compartment 665 can be added to or removed from the system, or replaced with the standard extension compartment 660. For example, if different racks require different working fluids, such as different purified fluids, or single-phase fluids and two-phase fluids, the enhanced extension compartment 665 can be used to form a second loop for the rack. That is, the heat exchanger 640 receives the second coolant and / or the third coolant as a heat removal medium and provides a fourth coolant to the rack. The fourth coolant may have the same or different composition as the second coolant.

[0051] By using two extension compartments in series, the regular extension is still able to deliver fluid flowing in the supply loop 414 to the racks, while the enhanced extension compartment delivers a different type of fluid to the racks, and the fluid from the supply loop is still used as the cooling fluid in the heat exchanger 640. In this design, the operating conditions or composition of the fluids in the standard extension compartment 660 and the enhanced extension compartment 665 can be configured differently and independently. Having the ability to install either the standard extension compartment or the enhanced extension compartment, or both in series, gives the system additional flexibility and resiliency.

[0052] Figure 7 is a schematic diagram showing a top view of a cooling system in a data center according to an embodiment. The figure shows six IT clusters 110, but for clarity, the system 200 is shown with one horizontal module 205 on only one cluster 110. It should be understood that each of the clusters 110 can be provided with a horizontal module 205 when filled and liquid cooling is required. When the cooling system 200 is provided on several or all IT clusters 110, each cluster 110 has a horizontal module 205 provided on the top of the cluster, and all clusters share one vertical cooling module 210. The supply loop 414 and the return loop 416 are connected to the corresponding coolant module 225 via connector 418, and to the vertical module 210 via connector 419. Thus, in the example shown, six sets of supply and return modules can be individually connected to six coolant modules of six different horizontal modules, and they are all connected to one vertical module.

[0053] exist Figure 7In the example of , each IT cluster 110 has two rows of server racks 111. In addition, in this example, the supply loop 414 and the return loop 416 of one horizontal module 205 serve two rows of racks 111 in one cluster 110. In the event that one of the groups 110 needs to be repaired, valves 418 and 419 can be closed, allowing the vertical modules to continue to serve the remaining groups. Similarly, if any of the cooling modules 220 or the coolant modules 225 fails or requires repair, valve 418 can be closed, while valve 419 can be opened, so that the coolant in the supply loop 414 and the return loop 416 can be provided by the vertical module 210. In addition, if any of the IT clusters 110 requires enhanced cooling capacity, valves 418 and 419 can be opened, so that cooling is provided from both the horizontal module 205 and the vertical module 210. Therefore, according to this design, a single vertical module 210 can be used as a backup or enhanced cooling option for any cluster, eliminating the need for multiple backup systems.

[0054] Figure 8 Another example is shown in which two rows of IT clusters 110 are arranged back-to-back with a vertical module 210 located therebetween. In this arrangement, further savings are achieved by having the vertical module serve both rows of IT clusters 110, wherein whenever any rack in any cluster requires a backup or enhanced coolant supply, the valves of the supply and return loops for that particular rack are opened to receive coolant from the vertical unit 210. As shown, in all disclosed embodiments, the vertical unit 210 may include an independent cooling unit 214 (i.e., a heat exchanger) and a coolant unit 212, wherein the coolant unit 212 is connected to the supply and return loops of several horizontal units via a plurality of connectors 419. Additionally, in the disclosed embodiments, the cooling unit 214 is operative to cool a liquid and deliver the cooled liquid to the coolant unit 212, while the coolant unit 212 is operative to provide a second cooling liquid to the supply loop 414 such that the liquid delivered by the coolant unit 212 is isolated from the liquid of the cooling unit 214. Figure 8 In an embodiment, the fluid supply loop and return loop (not visible) are configured to distribute cooling fluid throughout the two rows of IT clusters and are connected to a plurality of connectors 419 to selectively receive cooling fluid from the vertical unit 210. The supply loop includes standard connectors that enable quick and easy connection to the pipes leading to the racks. Thus, the entire cooling system can be assembled and tested in the factory, and then, when assembled on site, simply connected to each rack and ready to run.

[0055] Fig. 9is a flow chart showing the process of putting a cooling system into service in a simple plug-and-play manner. The process is shown in steps, but the order provided is not mandatory and may be changed. At 900, the cluster is populated with IT equipment and a liquid cooling system, such as a processor cooling loop, is assembled with the rack. At 905, a distribution module 215 is assembled on the cluster. The supply loop and return loop of the distribution module can be connected to the liquid cooling system of the rack. The liquid can then be pumped and pressurized to check for any leaks. At 910, the cooling module and the coolant module are assembled on the distribution module, and the pipes from the coolant module are connected to the loop of the distribution module. At 915, the vertical module is assembled, and at 920, the vertical module is connected to the loop of the distribution module.

[0056] Thus, the disclosed embodiments provide a modular cooling system that can be easily assembled as a plug-and-play piece in a data center facility. The system is two-dimensional in that it includes horizontal components and vertical components. The horizontal components are primary cooling modules and are dedicated to a group of server racks, while the vertical components are secondary or auxiliary cooling modules and can be used as backup or to provide enhanced cooling when needed. The vertical modules can be connected to several groups of server racks by connecting the coolant modules of the vertical units to several distribution modules of several horizontal units. The horizontal modules include a supply liquid loop and a return liquid loop that provide coolant to individual server racks from the horizontal modules, from the vertical modules, or from both. Both the horizontal modules and the vertical modules include a liquid-to-liquid heat exchanger so that the cooling liquid delivered to the supply loop is isolated from the cold side liquid of the heat exchanger.

[0057] Through the disclosed embodiment, a data center system is provided, comprising: a plurality of clusters, each cluster comprising a server cooling system for cooling a plurality of server racks; a plurality of horizontal cooling assemblies, each of which is mounted on one of the clusters and supplies cooling liquid to the corresponding server cooling system; and a vertical cooling assembly, which is mounted next to the plurality of clusters and provides auxiliary cooling liquid to the server cooling system of each of the plurality of clusters.

[0058] As shown, the entire cooling system is modularized by dividing it into multiple independent units that can be assembled together in different configurations to produce different effective cooling systems. The multiple independent units can be completely manufactured, assembled and tested in the factory so that when the modules are delivered on site, they are ready to be assembled and powered on. This shortens the design and construction time and greatly reduces costs because no customization or construction work is required. In addition, if a failure occurs, the failed module can be effectively replaced without affecting other modules.

[0059] The cooling system is a two-dimensional liquid cooling system and includes: a horizontal component configured to be positioned above a server cluster, the horizontal component including at least one cooling module, the cooling module including a cooler, a coolant module and a distribution module; a vertical component configured to be located on a side adjacent to the server cluster and including a cooler; wherein the coolant module is fluidly connected to the cooling module and the distribution module, and receives cooled liquid from the cooling module, and provides primary cooling liquid to the distribution module; wherein the distribution module is fluidly connected to the vertical component and receives secondary cooling liquid from the vertical component; and wherein the distribution module includes a plurality of branch connectors, the plurality of branch connectors are connected to the server cluster, and selectively provide primary cooling liquid and secondary cooling liquid to the server cluster.

[0060] In the foregoing description, embodiments of the present invention have been described with reference to specific exemplary embodiments of the present invention. It is apparent that various modifications may be made thereto without departing from the broader spirit and scope of the present invention as set forth in the appended claims. Therefore, the description and drawings are considered to be illustrative rather than restrictive.

[0061] Additionally, in the present disclosure, the terms "first", "second", "third", "fourth", "primary", "secondary" and "auxiliary" should be interpreted as being used only to distinguish different coolants, rather than to distinguish order, priority, hierarchy or importance.

Claims

1. A two-dimensional liquid cooling system for a data center, comprising: A horizontal component is configured to be located on the server cluster, the horizontal component comprising: providing at least one cooling module with a first cooling liquid; a coolant module; and Allocation module; a vertical assembly configured to be located on a side adjacent to the server cluster, the vertical assembly comprising an auxiliary coolant module fluidly coupled to the distribution module and providing a third cooling liquid; wherein the coolant module is fluidly coupled to the cooling module and the distribution module, and receives the first coolant from the cooling module, and provides a second coolant to the distribution module; wherein the distribution module is fluidly coupled to the vertical assembly and receives the third coolant from the vertical assembly; and Wherein, the distribution module comprises a plurality of branch connectors, the plurality of branch connectors are connected to the server cluster and selectively provide the second coolant and the third coolant to the server cluster; wherein each of the auxiliary coolant modules is fluidly coupled to a plurality of the distribution modules to provide the third coolant to a plurality of the server clusters; and Each branch of the branch connector is connected to a corresponding rack of the server cluster, the distribution module further includes an extended heat exchanger, and each of the racks includes an extended heat exchanger integrated with the rack.

2. The cooling system according to claim 1, wherein: The coolant module includes a heat exchanger that receives the first coolant liquid from the cooling module and provides the second coolant liquid to the distribution module.

3. The cooling system according to claim 1, wherein: The coolant module includes a fluid filtration system that receives the first coolant from the cooling module and provides the second coolant to the distribution module.

4. The cooling system according to claim 1, wherein: The distribution module includes an extension module accommodating the plurality of branch connectors, a supply loop, and a return loop.

5. The cooling system according to claim 4, wherein: The extension module further includes a port holder supporting the plurality of branch connectors and a plurality of channels for branching each of the branch connectors to a corresponding rack of the server cluster.

6. The cooling system according to claim 5, wherein: The extension module also includes the extension heat exchanger, which receives the cooling liquid from the coolant module and supplies purified liquid to the server cluster.

7. The cooling system of claim 1 further comprising a first valve device and a second valve device, the first valve device selectively enabling fluid flow between the coolant module and the distribution module, and the second valve device selectively enabling fluid flow between the auxiliary coolant module and the distribution module.

8. A data center system, comprising: a plurality of clusters, each cluster comprising a server cooling system for cooling a plurality of server racks; a plurality of horizontal cooling assemblies, each horizontal cooling assembly being mounted on one of the clusters and supplying primary coolant to a corresponding server cooling system; as well as a vertical cooling assembly mounted adjacent to the plurality of clusters and providing supplemental cooling fluid to a server cooling system of each of the plurality of clusters; wherein each of the horizontal cooling assemblies comprises a distribution module, the distribution module being fluidly coupled to the vertical cooling assembly and selectively distributing the primary cooling liquid and the auxiliary cooling liquid to corresponding server cooling systems; as well as The distribution module includes a plurality of branch connectors, each branch of the branch connectors being connected to a corresponding server rack of the cluster, each of the server racks including an extended heat exchanger integrated with the server rack.

9. The system according to claim 8, wherein: Each of the horizontal cooling assemblies includes a cooling module and a coolant module fluidly connected to the cooling module and a corresponding distribution module.

10. The system according to claim 9, wherein: The coolant module includes a heat exchanger that receives the primary coolant from the cooling module and provides the primary coolant to the distribution module.

11. The system according to claim 9, wherein: The coolant module includes a liquid filtration system that receives the coolant from the cooling module and provides the main coolant to the distribution module.

12. The system according to claim 8, wherein: The distribution module includes a liquid loop layer and an extension layer, the liquid loop layer includes a supply loop and a return loop, and the extension layer includes a plurality of branch connectors, each branch connector is coupled to a port of the server cooling system.

13. The system according to claim 12, wherein: The extension layer includes a port holder supporting the plurality of branch connectors and a plurality of channels for branching each of the branch connectors to a corresponding port of the server cooling system.

14. The system of claim 13, further comprising a reinforced extension layer comprising a heat exchanger and a plurality of branch connectors fluidly connected to a hot side of the heat exchanger, and wherein, The cold side of the heat exchanger is fluidly coupled to the liquid circuit layer, thereby forming a plurality of circuits within the reinforced extension layer.

15. The system of claim 8, further comprising: a first valve device that selectively enables fluid flow between the horizontal cooling assembly and the distribution module; and a second valve arrangement that selectively enables fluid flow between the vertical cooling assembly and the distribution module.

16. The system of claim 15, wherein: The vertical cooling assembly includes an external cooling unit and an auxiliary coolant module that receives cooling liquid from the external cooling unit and provides auxiliary cooling liquid to the distribution module.

17. The system of claim 8, further comprising a second plurality of clusters, and wherein: The vertical cooling assembly is located between the plurality of clusters and the second plurality of clusters and provides the auxiliary cooling fluid to the server cooling system of each of the plurality of clusters and the second plurality of clusters.

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