JP2016538524A - Cooling system management for server equipment - Google Patents

Abstract

A computer room air handler (CRAH) unit regulates cooling air and supplies it to the first zone. The second zone collects the return air from the first zone, except that the plurality of servers are between the first zone and the second zone and the air heated by those servers is second Positioned to be driven into the area. The first zone is separated from the second zone by one or more racks that house the servers and thermal insulation in the area between each server, so that the cooling air in the first zone is second Mixing with return air in the area is prevented. A third zone representing the remaining area of the server equipment is kept at a predefined temperature, but that temperature is higher than the temperature of the first zone and lower than the temperature of the second zone.

Description

  One embodiment of the present invention relates to cooling system management for server equipment, for example.

  [0001] Server equipment may include a collection of computer systems consisting of a primary server and a backup server. The server facility can also include environmental controls and security devices that protect the data contained within the server facility system. Servers are typically stored in racks. There can be a large number of servers in one rack, and the server equipment can have a large number of racks.

  [0002] Each server has a specific heat output based on the amount of power it consumes, and thus a cooling system within the server equipment may be essential to the maintenance and function of these servers. General features of conventional cooling approaches may include ambient cooling where a computer room air conditioning (CRAC) unit is placed around the outer perimeter of the rack, and elevated floors where cool air is sent to the rack through the plenum under the floor. The traditional cooling approach system wastes a significant amount of energy by mixing the hot air from the server with the cold air sent to the rack, cooling the air to a lower temperature to compensate for the mixing. To do so, the CRAC unit may consume more energy.

  [0003] As more companies begin to use practical servers and sharp edge servers in their server equipment, the amount of power consumed per server increases the heat output in the server equipment. Can lead to an overall increase in. As energy costs become higher and energy consumption rates increase, more efficient cooling systems may need to be implemented within the server equipment.

  One embodiment of the present invention relates to cooling system management for server equipment, for example.

[0004]
This summary is provided to outline a selection of concepts in a more simplified form that are further described below in the detailed description. This summary is not intended to identify exclusively important or essential features of the claimed subject matter, nor is it intended to assist in determining the scope of the claimed subject matter.

  [0005] Embodiments are directed to a method and temperature management system for managing a cooling system in a server facility. According to some embodiments, a computer room air handler (CRAH) unit can regulate and supply cooling air to the first area. The second zone can collect the return air from the first zone, but the plurality of airs so that the air heated by the server is forced into the second zone to allow air recovery. A server can be positioned between the first area and the second area. The first zone is separated from the second zone by one or more racks that house the servers and thermal insulation in the area between each server, so that the cooling air in the first zone is second Mixing with return air in the area can be prevented. According to another embodiment, the third zone representing the remaining area of the server facility can be kept at a predefined temperature, provided that the temperature is higher than the temperature of the first zone. It can be higher and lower than the temperature of the second zone.

  [0006] These and other features and advantages will become apparent upon reading the following detailed description and studying the associated drawings. It should be understood that the foregoing general description and the following detailed description are exemplary and are not intended to limit the claimed aspects.

[0007] FIG. 2 is a conceptual diagram illustrating an example temperature management system in a server facility in which embodiments may be implemented. [0008] FIG. 2 illustrates in more detail a first zone and a second zone of an exemplary temperature management system in a server facility. [0009] FIG. 4 is a conceptual diagram illustrating an alternative embodiment for a temperature management system in a server facility. [0010] FIG. 1 illustrates a system for managing a cooling system in a server facility. [0011] FIG. 2 is a block diagram illustrating an example computing operating environment in which embodiments may be implemented. [0012] FIG. 6 is a logic flow diagram illustrating a method for managing a cooling system in a server facility, according to an embodiment.

  [0013] As briefly described above, a computer room air handler (CRAH) unit can regulate and supply cooling air to the first zone. The second zone is capable of collecting return air from the first zone, but multiple such that the air heated by the server is forced into the second zone to allow air recovery. Servers may be positioned between the first zone and the second zone. The first zone is separated from the second zone by one or more racks that house the servers and thermal insulation in the area between each server, so that the cooling air in the first zone is second Mixing with return air in the area can be prevented.

  [0014] In the detailed description that follows, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration specific embodiments or examples. These aspects can be combined, other aspects can be utilized, and structural changes can be made without departing from the spirit or scope of the disclosure. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims and their equivalents.

  [0015] Although some embodiments are described in the general context of program modules that are executed in conjunction with application programs that are executed on an operating system on a personal computer, aspects are described in terms of other program modules. Those skilled in the art will recognize that they can also be implemented in combination.

  [0016] Generally, program modules include routines, programs, components, data structures, and other types of structures that perform particular tasks or implement particular abstract data types. Furthermore, embodiments are implemented in other computer system configurations including handheld devices, microprocessor systems, microprocessor-based consumer electronics or programmable consumer electronics, minicomputers, mainframe computers, and equivalent computing devices. Those skilled in the art will appreciate that this may be done. Embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules can be located in both local and remote memory storage devices.

  [0017] Some embodiments may be implemented as a computer-implemented process (method), as a computing system, or as an article of manufacture such as a computer program product or computer-readable medium. A computer program product can be a computer storage medium that is readable by a computer system and that encodes a computer program comprising instructions for causing a computer or computing system to perform an exemplary process. The computer readable storage medium is a computer readable memory device. The computer-readable storage medium is, for example, via one or more of volatile computer memory, non-volatile memory, hard drive, flash drive, floppy disk, or compact disk, and equivalent hardware media. Can be implemented.

  [0018] Throughout this specification, the term "platform" may be a combination of software and hardware components for operating an air cooling management system. Examples of platforms include, but are not limited to, hosted services that run across multiple servers, applications that run on a single computing device, and equivalent systems. The term “server” generally refers to a computing device that executes one or more software programs, typically in a networked environment. However, the server can also be implemented as a virtual server (software program) that runs on one or more computing devices that are considered servers on the network. Further details regarding these techniques and exemplary operations are given later.

  [0019] FIG. 1 includes a conceptual diagram illustrating an exemplary temperature management system in a server facility in which embodiments may be implemented. As shown in FIG. 1, the system may include a first zone 102, a second zone 108, a third zone 114, and a computer room air handler (CRAH) unit 110. A plurality of servers 106 can be positioned in one or more racks 104 that form a boundary 105 between the first area 102 and the second area 108. The first area can be in contact with the front ends of multiple servers, and the second area can be in contact with the back ends of those servers.

  [0020] The CRAH may be configured to supply cooling air 103 to the first zone, and as the CRAH unit 110 supplies cooling air 103 to the first zone 102, the server 106 It is possible to take cooling air 103 through the front end of those servers and circulate the cooling air in the servers. As the cooling air circulates in the servers, the air can be heated and driven into the second area 108 through the back end of those servers, provided that the second area 108 is The heated air, that is, the return air 107 can be recovered. The first area 102 can be substantially corridor-shaped, with one or more racks forming opposing walls and is shielded by insulation to provide cooling air in the first area 102. 103 can be prevented from mixing with the return air 107 in the second zone 108 area. The area between each server in the one or more racks 104 at the ceiling of the first area 102 and at the boundary 105 of the first area 102 and the second area 108 can be shielded with insulation. is there.

  [0021] A temperature monitoring system coupled to the management controller is capable of measuring the air temperature of each zone and the external environment. The temperature monitoring system can compare the temperature of the return air 107 in the second zone 108 with the temperature of the air in the external environment. If the air in the external environment is hotter than the return air 107 in the second zone 108, the management controller commands the switch 116 to supply the return air 107 in the second zone 108 to the CRAH unit 110. It is possible. In an alternative embodiment, if the air in the external environment is cooler than the return air in the second zone, the management controller expels the return air to the external environment, takes air from the external environment, and supplies it to the CRAH unit. It is possible to give a command to the switch.

  [0022] Next, the CRAH unit 110 may use one or more of the cooling coils and chilled water to regulate the cooling air 103 to be supplied to the first zone 102. The third area 114 may represent the remaining area of the server facility. The third zone 114 can be kept at a predefined temperature, provided that the temperature is higher than the temperature of the first zone 102 and lower than the temperature of the second zone 108. It is.

  [0023] The third area 114 may include a fire suppression system, a security system, and / or a surveillance system. In particular, the large amount of power consumed by a server in a server facility having a significant number of racks can pose a serious risk of fire due to significant heat output. Although the cooling system may serve as a preventive measure to reduce the risk of fire, a fire suppression system may be essential. The fire suppression system may include one or more thermal sensors and / or wiring for detection and a combination of powder and / or liquid agents, such as a sprinkler system, that extinguish the fire.

  [0024] An additional risk associated with server equipment is a security risk. If some or all of the servers may not be replaced and disclosed to unauthorized persons, confidentiality such as corporate data, financial data, or medical data can be disruptive Data or sensitive data may be stored. Security systems such as cameras and alarms can be implemented to ensure containment of that data. The camera may be further useful for manual detection of fire if a fire suppression system malfunctions. It is also possible for a monitoring system such as the temperature monitoring system described above to be present in the third zone 114.

  [0025] The exemplary system of FIG. 1 has been described using specific components, specific tasks of components, and specific arrangements of components. Embodiments are not limited to systems with this exemplary configuration. A thermal management system in a server facility may be implemented in a configuration that uses fewer components or additional components and performs other tasks. In addition, temperature management systems in other facilities may be implemented in a similar manner using the principles described herein.

  [0026] FIG. 2 shows in more detail a first zone and a second zone of an exemplary temperature management system in a server facility. As described in FIG. 1, the thermal management system may include a plurality of servers 206 positioned within one or more racks 204 that form a boundary 205 between the first area 202 and the second area 208. . The first area 202 can be in contact with the front end of those servers, and the second area 208 can be in contact with the back end of those servers. The system can also include a third zone 214 that can be kept at a predefined temperature, provided that the temperature is higher than the temperature in the first zone 202 and in the second zone 208. Below temperature.

  [0027] As the cooling air 203 is supplied to the first zone 202, the servers 206 take in the cooling air 103 via the first fans 210 at the front end of those servers and draw the cooling air in the servers. It is possible to circulate. As the cooling air circulates in the servers, the air can be heated as a result of the heat output of those servers. Servers 206 can drive the heated air into the second area 208 via the second fan 212 in the back end of those servers, provided that the second area 208 is heated. The collected air, that is, the return air 207 can be recovered.

  [0028] As described above, the first section 202 can be substantially corridor-shaped, forming walls facing one or more racks, shielded by thermal insulation, The cooling air 203 in the second section 202 can be prevented from mixing with the return air 207 in the second section 208. The area between each server in the one or more racks 204 at the ceiling of the first area 202 and at the boundary 205 between the first area 202 and the second area 208 can be shielded with insulation. is there. Those insulations may be selected based on local, state, and federal regulations, and industry standards. For example, regulations and industry standards can mandate the use of materials with specific properties or of specific quality to ensure safety and efficiency. Those insulations may be further selected based on fire suppression capabilities and security capabilities. For example, a transparent material can be used to block the first area, allowing the security system to monitor the server for intrusions or to easily detect fires. In another example, aluminum can be used in the structural frame of the first zone for the fire suppression capability of this metal.

  [0029] Blocking the first area 202 may reduce the energy consumption rate of the server equipment. By preventing the cooling air 203 from mixing with higher temperature air, such as return air 207 and air in the third zone, the computer room air handler (CRAH) unit is in the first zone 202. It is possible to reduce the energy consumption of adjusting the cooling air to the appropriate temperature to be supplied. The temperature of the cooling air can be in the range of about 10 ° C. (50 degrees Fahrenheit) to about 23.9 ° C. (75 degrees Fahrenheit).

  [0030] For example, using current solutions, the CRAH unit supplies air at about 20 ° C. (68 degrees Fahrenheit) to a cooling area similar to the first zone 202, where the air is in the cooling area. It is possible to compensate for the increase in air temperature as it mixes with higher temperature air from other areas of the facility. In contrast, using the proposed solution, the CRAH unit allows the cooling air to reach higher temperatures, such as return air 207 in the second zone 208 and air in the third zone 214. Since it is not necessary to compensate for mixing with air, it is possible to supply the first zone 202 with cooling air 203 having a temperature of only 25.6 ° C. (78 degrees Fahrenheit). A temperature difference of 5.6 degrees (10 degrees in Fahrenheit) can correspond to a significant reduction in energy consumption and, as a result, can correspond to a significant reduction in energy costs.

  [0031] Referring to FIG. 3, a conceptual diagram 300 illustrates an alternative embodiment for a temperature management system in a server facility. A temperature monitoring system coupled to the management controller can measure the air temperature in each zone and the air temperature in the external environment 312. The temperature monitoring system can compare the air temperature in the external environment 312 with the temperature of the return air 307 in the second zone 308. In response, the management controller can communicate with the switch 302 to provide instructions that depend on the air temperature comparison.

  In the first scenario, the air in the external environment 312 can be cooler than the return air 107 in the second zone 108. In response, the management controller can give the switch 302 a command to expel the return air 307 to the external environment 312 via the exhaust pipe 304 and take in the air 311 from the external environment 312 via the intake pipe 306. is there. Next, air 311 from the external environment 312 can be supplied to the CRAH unit 110.

  [0033] In the second scenario, the air in the external environment 312 can be hotter than the return air 307 in the second zone 308. The management controller can provide the switch 302 with an instruction to supply the return air 307 in the second zone 308 to the CRAH unit 310.

  [0034] FIG. 4 shows a system for managing a cooling system in a server facility. System 400 may include a management controller 410, a first zone 412, a second zone 414, a computer room air handler (CRAH) unit 416, an external environment 418, and a third zone 420. The management controller 410 can be operated by human control, or may be instructed by the remote control 402 via the network 404. Data related to controlling various processes that manage the cooling system may be stored in and / or received from the data store 430.

  [0035] The server may be located in one or more racks that form a boundary between the first area 412 and the second area 414. The first zone 412 is in contact with the front end of the servers and as the cooling air is supplied to the first zone 412, the servers are cooled via a first fan at the server front end. It is possible to be able to take in air. The servers can circulate the cooling air through the servers and drive the heated return air through a second fan at the back end of the servers, provided that the second Area 414 is in contact with the back end of those servers and can recover its return air.

  [0036] The return air in the second zone 414 can be supplied to the CRAH unit 416 or, alternatively, can be expelled to the external environment 418. The management controller 410 can be coupled to a server facility temperature monitoring system and can communicate with the switch to provide instructions based on measurements and comparisons made by the temperature monitoring system. The temperature monitoring system can measure the temperature of the return air in the second zone 414 and compare it to the air temperature in the external environment 418. If the air in the external environment 312 is at a higher temperature than the return air in the second zone 414, the management controller may command the switch to supply the return air from the second zone 414 to the CRAH unit 416. Is possible. Alternatively, if the air in the external environment 418 is cooler than the return air in the second zone 414, the management controller can command the switch to drive the return air to the external environment 418. Further instructions for taking air from the external environment 418 can be provided to the switch. Next, air from the external environment 418 may be supplied to the CRAH unit 416.

  [0037] Next, the CRAH unit 416 may use one or more of the cooling coils and chilled water to regulate the cooling air. Once the air is well conditioned, the cooling air can be supplied to the first zone 412.

  [0038] The third zone 420 represents the remaining area of the server equipment and can be kept at a predefined temperature, provided that the temperature is higher than the temperature of the first zone 412; It can be lower than the temperature of the second zone 414. The third area 420 may include a fire suppression system, a security system, and / or a monitoring system that is controlled by the management controller 410.

  [0039] The embodiments in FIGS. 1-4 have been described using a particular system that includes components, component tasks, and component placement. Embodiments are not limited to systems with these exemplary configurations. The management of the cooling system in the server facility is configured using other types of systems including components, component tasks, and component placement in a similar manner using the principles described herein. May be implemented.

  [0040] FIG. 5 and the associated description are intended to provide a brief general description of a suitable computing environment in which embodiments may be implemented. With reference to FIG. 5, a block diagram of an exemplary computing operating environment for an application in accordance with an embodiment, such as a computing device 500, is shown. In a basic configuration, computing device 500 may be any portable computing device with wireless communication capabilities, which in some examples may include touch detection capabilities and / or gesture detection capabilities. And may include at least one processing unit 502 and system memory 504. The computing device 500 may also include a plurality of processing devices that cooperate when executing a program. Depending on the exact configuration and type of computing device, system memory 504 may be volatile (such as RAM) or non-volatile (such as ROM, flash memory, etc.) Combinations are also possible. System memory 504 controls the operation of the platform, such as the WINDOWS® operating system, WINDOWS MOBILE® operating system, or WINDOWS PHONE® operating system from Microsoft Corporation in Redmond, Washington. A suitable operating system 505 is typically included. The system memory 504 may also include one or more software applications, such as the management controller application 522, and a switch module 524.

  [0041] A management controller application 522 coupled to the temperature monitoring system can communicate with the switch module 524 to provide instructions, which depend on the measurements and comparisons made by the temperature monitoring system. . The temperature monitoring system can measure the air temperature of each area in the server facility and the air temperature of the external environment, and can compare the air temperature of the second area with the air temperature of the external environment. . In response to determining that the air in the external environment is at a higher temperature than the return air in the second zone, the management controller application 522 instructs the switch module 524 to supply the return air to the CRAH unit. Is possible. Alternatively, in response to determining that the air in the external environment is at a lower temperature than the return air in the second zone, the management controller application 522 instructs the switch module 524 to expel that return air to the external environment. It is possible. The management control application 522 can further instruct the switch module 524 to take air from the external environment and supply the air from the external environment to the CRAH unit. Management controller application 522 and switch module 524 may be separate applications or an integrated module of hosted services. This basic configuration is illustrated in FIG. 5 by the components within dashed line 508.

  [0042] The computing device 500 may have additional features or functions. For example, the computing device 500 may include additional data storage devices (removable and / or non-removable) such as, for example, magnetic disks, optical disks, or tapes. Such additional storage is illustrated in FIG. 5 by removable storage 509 and non-removable storage 510. A computer readable storage medium is a volatile, non-volatile, removable medium implemented in any manner or technique for storing information such as computer readable instructions, data structures, program modules, or other data, and Non-removable media can be included. System memory 504, removable storage 509, and non-removable storage 510 are all examples of computer-readable storage media. Computer readable storage media include RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic This includes, but is not limited to, a storage device or any other medium that can be used to store desired information and can be accessed by computing device 500. Any such computer readable storage media may be part of computing device 500. The computing device 500 may also include an input device 512 such as a keyboard, mouse, pen, voice input device, touch input device, light capture device for detecting gestures, and equivalent input devices. Output devices 514 such as displays, speakers, printers, and other types of output devices can also be included. These devices are well known in the art and need not be described in detail herein.

  [0043] Some embodiments may be implemented in a computing device that includes a communication module, a memory device, and a processor, where the processor is stored in the memory device. In connection with the instruction, the method described above or an equivalent method is performed. Other embodiments may be implemented as a computer readable memory device in which instructions for performing the methods described above or similar methods are stored. Examples of memory devices as various hardware implementations are described above.

  [0044] Computing device 500 also communicates with other devices 518, such as via a wired or wireless network, satellite link, cellular link, short-range network, and the like mechanisms in a distributed computing environment. It is also possible to include a communication connection 516 that allows the user to do so. Other devices 518 may include computer devices that run communication applications, web servers, and equivalent devices. Communication connection 516 is an example of a communication medium. Communication media may include computer readable instructions, data structures, program modules, or other data therein. By way of example, and not limitation, communication media includes wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared and other wireless media.

  [0045] The exemplary embodiment also includes a method. These methods can be implemented in any number of ways, including the structures described herein. One such aspect is due to the mechanical operation of a device of the type described herein.

  [0046] Another optional aspect relates to one or more of the individual actions of those methods to be performed in conjunction with some being performed by a human operator. These human operators do not have to be co-located with each other, but each can only be co-located with a machine that executes a portion of the program.

  [0047] FIG. 6 shows a logic flow diagram for a process 600 of a method for managing a cooling system in a server facility according to an embodiment. Process 600 may be implemented on a server or other system.

  [0048] Process 600 may begin at operation 610 where cooling air may be supplied to the first zone. The first area includes one or more racks that accommodate the plurality of servers, and thermal insulation between each server in the one or more racks at the boundary between the first area and the second area. Can be separated from the second zone. The first zone is in contact with the front end of the servers so that the servers can take in the cooling air supplied to the first zone and circulate the cooling air in the servers. It is possible to As the cooling air is circulated within the servers, the servers can heat the air and drive the return air into the second zone. At act 620, the heated return air can be recovered in the second zone.

  [0049] In operation 630, in response to determining that the air in the external environment is at a higher temperature than the return air in the second zone, the return air in the second zone may be provided to the CRAH unit. In optional operation 640, in response to determining that the air in the external environment is at a lower temperature than the return air in the second zone, the return air is alternatively expelled or warmed to the external environment. It can also be redirected to another space that may be necessary. In that case, air in the external environment can be taken in and supplied to the CRAH unit.

  [0050] At operation 650, the CRAH unit may use one or more of the cooling coils and chilled water to regulate cooling air. In operation 660, after being fully adjusted, the CRAH unit can supply its cooling air to the first zone.

  [0051] The operations included in process 600 are for illustration purposes. Management of the cooling system in the server facility can be performed by a similar process having fewer steps or additional steps using the principles described herein and can also be performed in a different order of operation. Is possible.

  [0052] The above details, examples, and data provide a complete description of the manufacture and use of the configuration of the embodiments. Although the subject matter has been described in language specific to structural features and / or methodological acts, the subject matter defined in the appended claims refers to the specific features or acts described in the preceding paragraph. It should be understood that this is not necessarily a limitation. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims and embodiments.

Claims (15)

A method for managing a cooling system in a server facility, the method comprising:
Supplying cooling air from a Computer Room Air Handler (CRAH) unit to the first zone;
Recovering return air from the first zone within a second zone, wherein a plurality of servers are between the first zone and the second zone by the server. A method in which heated air is pushed into the second area and the first area is positioned so that it is substantially insulated from the rest of the server equipment.   The method of claim 1, wherein the plurality of servers are located in one or more racks that form a boundary between the first area and the second area.   The method of claim 2, wherein the first area is in contact with a front end of the plurality of servers, and the second area is in contact with a back end of the plurality of servers.   The cooling air supplied to the first zone is taken into the plurality of servers through a suction pipe in the front end of the plurality of servers, and the cooling air is circulated between the plurality of servers. 4. The method of claim 3, further comprising the step of: The method further comprising the step of blocking the ceiling of the first area with a heat insulating material,
The method of claim 1, wherein the first area is substantially in the shape of a corridor, forming a wall on which one or more racks of servers oppose.   The area between each server in one or more racks at the boundary of the first zone and the second zone is shielded with insulation to prevent the cooling air and the return air from mixing. The method of claim 5, further comprising a step. A method further comprising using a temperature monitoring system comprising:
The method of claim 1, wherein the temperature monitoring system measures the air temperature in each zone and the air temperature in the external environment. In response to determining that the air in the external environment has a lower air temperature than the return air in the second zone,
Expelling the return air in the second zone to the external environment;
Capturing the air from the external environment;
The method of claim 7, further comprising supplying the air from the external environment to the CRAH unit.   8. The method of claim 7, further comprising supplying the return air to the CRAH unit in response to determining that the air in the external environment is at a higher air temperature than the return air in the second zone. Method.   The method of claim 1, further comprising adjusting one or more of the cooling coils and the cooling air using cold water. A temperature management system for server equipment, the system comprising:
A computer room air handler (CRAH) unit configured to supply cooling air to the first zone;
The first zone is delimited from the second zone by one or more racks that house a plurality of servers, and insulation in the area between each server;
The first area is substantially insulated from the rest of the server equipment;
The second zone is configured to collect return air from the first zone, and the plurality of servers are heated by the server between the first zone and the second zone. A system positioned such that air is driven into the second area.   The system of claim 11, wherein the insulation is selected based on one or more of local, state, and federal regulations, and industry standards.   The system of claim 12, wherein the insulation is further selected based on fire suppression capabilities and security capabilities. The temperature management system further includes a temperature monitoring system,
The temperature monitoring system includes:
Measure the air temperature in each area and the air temperature in the external environment,
Comparing the air temperature in the external environment with the air temperature of the return air in the second zone;
The system of claim 11, configured to supply either air from the external environment or the return air to the CRAH unit based on the result of the comparison. A method for managing a cooling system in a server facility, the method comprising:
Supplying cooling air from a computer room air handler (CRAH) unit to a first zone, wherein the first zone is substantially insulated from the rest of the server equipment;
Recovering return air from the first zone in a second zone, wherein a plurality of servers are heated by the server between the first zone and the second zone. Is positioned to be driven into the second area;
Maintaining a predefined air temperature within a third zone, wherein the predefined air temperature of the third zone is higher than the air temperature of the first zone, And a step below the air temperature of the area.