Auxiliary cooling unit device of compressor

Abstract

A cooling distribution unit includes a refrigeration unit configured to be coupled to a dry cooling unit. The refrigeration unit is configured to receive the first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit for cooling. The cooling distribution unit also includes a first control valve coupled to the refrigeration unit. The first control valve is configured to output a first portion of a second cooling fluid at a first temperature. The cooling distribution unit also includes a second control valve coupled to the refrigeration unit. The second control valve is configured to output a second portion of the second cooling fluid at a second temperature.

Description

Technical Field

[0001] The technical field relates generally to cooling systems and, more particularly, to cooling systems that combine different techniques for removing heat from rack powered equipment within a data center. Background Art

[0002] A data center can include a building, a dedicated space within a building (such as a room or closet), or a group of buildings used to house electronic equipment (such as servers) and related components (such as telecommunications equipment, network equipment, and storage systems). Data centers typically include redundant or backup components and infrastructure for power, data communication connections, environmental controls (such as air conditioning and fire suppression), and various safety devices. Data centers can vary greatly in size, power requirements, redundancy, and overall structure. Managing the heat generated by electronic equipment within a data center ensures the proper operation of the electronic equipment and increases its life expectancy. Summary of the invention

[0003] One aspect of the present disclosure relates to a cooling distribution unit, which includes a refrigeration unit configured to be coupled to a dry cooling unit. The refrigeration unit is configured to receive a first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit for cooling. The cooling distribution unit also includes a first control valve coupled to the refrigeration unit. The first control valve is configured to output a first portion of a second cooling fluid at a first temperature. The cooling distribution unit also includes a second control valve coupled to the refrigeration unit. The second control valve is configured to output a second portion of the second cooling fluid at a second temperature.

[0004] Embodiments of the cooling distribution unit may also include a pump on the return line of the second portion of the second cooling fluid. The pump may be configured to control the pressure of the second portion of the second cooling fluid output by the second control valve. The pressure of the second portion of the second cooling fluid may be less than atmospheric pressure. The cooling distribution unit may also include an ejector in fluid communication with the pump to help control the pressure of the second portion of the second cooling fluid output by the second control valve. The cooling distribution unit may also include a controller configured to selectively control the first control valve, the second control valve, and the pump. The controller may also be configured to selectively control the compressor of the refrigeration unit to achieve at least one of an energy-saving mode, a mechanical mode, or a hybrid operating mode. The cooling distribution unit may also include at least one temperature sensor communicating with the controller. The controller may also be configured to determine the operating mode based at least in part on an input signal from at least one temperature sensor. The cooling distribution unit also includes a heat exchanger disposed between the refrigeration unit and the first control valve and the second control valve. The second cooling fluid may return to the heat exchanger in a relatively warm state, and the heat exchanger is configured to cool the second cooling fluid. The heat exchanger may be coupled to the refrigeration unit. The heat exchanger may be configured to receive a third cooling fluid in a relatively cold state from a refrigeration unit and output the third cooling fluid in a relatively warm state to the refrigeration unit for cooling. The refrigeration unit may include a condenser, a valve in fluid communication with the condenser, an evaporator in fluid communication with the valve, and a compressor in fluid communication with the evaporator and the condenser. The condenser may be configured to receive a first cooling fluid in a relatively cold state from a dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit. The cooling distribution unit may also include at least one valve between the refrigeration unit and the dry cooling unit. At least one valve may be configured to control the amount of the first cooling fluid flowing into and out of the dry cooling unit. The cooling distribution unit may also include a first pump configured to output a first portion of a second cooling fluid and a second pump configured to output a second portion of the second cooling fluid. The cooling distribution unit may also include a first pump on a supply line of the first portion of the second cooling fluid and a second pump on a return line of the second portion of the second cooling fluid. The first pump may be configured to control the pressure of the first portion of the second fluid, and the second pump may be configured to control the pressure of the second portion of the second cooling fluid. The return line of the first portion of the second cooling fluid may be coupled to the three-way valve of the supply line of the first portion of the second cooling fluid. The return line of the second portion of the second cooling fluid may be coupled to the three-way valve of the supply line of the second portion of the second cooling fluid.

[0005] Another aspect of the present invention relates to a method for dispensing a cooling fluid at two different temperatures. In one embodiment, the method includes: providing cooling fluid to a first control valve and a second control valve; controlling the first control valve to output a first portion of the cooling fluid at a first temperature; and controlling the second control valve to output a second portion of the cooling fluid at a second temperature.

[0006] Embodiments of the method may also include controlling the pressure of the second portion of the cooling fluid. Controlling the pressure may include coupling the pump to a return line of the second portion of the second cooling fluid. The pump may be configured to control the pressure of the second portion of the cooling fluid output by the second control valve. The pressure of the second cooling fluid may be less than atmospheric pressure. Controlling the pressure may also include providing an ejector in fluid communication with the pump to help control the pressure of the second portion of the cooling fluid output by the second control valve. The method may also include selectively controlling the first control valve, the second control valve, and the pump of the system with a controller. The controller may also be configured to selectively control a compressor of a refrigeration unit to achieve at least one of an energy-saving mode, a mechanical mode, or a mixed mode of operation. The cooling fluid may be output by a refrigeration unit coupled to a dry cooling unit. The refrigeration unit may be configured to receive a first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit for cooling. The first control valve and the second control valve may be coupled to the refrigeration unit. A heat exchanger may be disposed between the refrigeration unit and the first control valve and the second control valve.

[0007] Yet another aspect of the present disclosure relates to a cooling distribution unit, comprising a refrigeration unit configured to be coupled to a dry cooling unit. The refrigeration unit comprises a condenser, a valve in fluid communication with the condenser, an evaporator in fluid communication with the valve, and a compressor in fluid communication with the evaporator and the condenser. The condenser is configured to receive a first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit. The cooling distribution unit also comprises a heat exchanger coupled to the refrigeration unit. The heat exchanger is configured to receive a second cooling fluid in a relatively cold state from the evaporator of the refrigeration unit and output the second cooling fluid in a relatively warm state to the evaporator of the refrigeration unit. The cooling distribution unit also comprises a first control valve coupled to the heat exchanger. The first control valve is configured to output a first portion of a third cooling fluid from the heat exchanger at a first temperature. The cooling distribution unit also comprises a second control valve coupled to the heat exchanger. The second control valve is configured to output a second portion of the third cooling fluid from the heat exchanger at a second temperature. The cooling distribution unit also comprises a pump coupled to a return side of the liquid cooling equipment rack. The pump is configured to control the pressure of the second portion of the third cooling fluid output by the second control valve.

[0008] Other aspects, embodiments and advantages of these example aspects and embodiments are discussed in detail below. In addition, it should be understood that the foregoing information and the following detailed description are merely illustrative examples of various aspects and embodiments, and are intended to provide an overview or framework for understanding the nature and characteristics of the claimed aspects and embodiments. The embodiments disclosed herein may be combined with other embodiments, and references to "embodiment", "example", "some embodiments", "some examples", "alternative embodiments", "various embodiments", "one embodiment", "at least one embodiment", "this and other embodiments", "certain embodiments", etc. are not necessarily mutually exclusive, but are intended to indicate that the specific features, structures or characteristics described may be included in at least one embodiment. The appearance of these terms here does not necessarily all refer to the same embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Various aspects of at least one embodiment are discussed below with reference to the accompanying drawings, which are not intended to be drawn to scale. The accompanying drawings are included to provide illustration and further understanding of the various aspects and embodiments, and are incorporated into and constitute a part of the specification, but are not intended as a definition of the limits of any particular embodiment. The accompanying drawings, together with the rest of the specification, serve to explain the principles and operation of the described and claimed aspects and embodiments. In the drawings, each identical or nearly identical component shown in various figures is represented by the same number. For clarity, not every component is labeled in every figure. In the drawings:

[0010] Figure 1 is a perspective view of a cooling distribution unit according to an embodiment of the present disclosure;

[0011] Figure 2 is a schematic diagram of a liquid cooled equipment rack cooled by a chiller and / or dry cooling unit and a cooling distribution unit;

[0012] Figure 3 is a schematic diagram of multiple groups of liquid-cooled racks requiring different cooling temperatures cooled by a chiller and / or a dry cooling unit and a cooling distribution unit;

[0013] Figure 4 is a schematic diagram of a cooling distribution unit according to an embodiment of the present disclosure;

[0014] Figure 5 is a schematic diagram of a cooling distribution unit according to another embodiment of the present disclosure;

[0015] Figure 6 is a schematic diagram of a cooling distribution unit according to another embodiment of the present disclosure;

[0016] Figure 7 is a schematic diagram illustrating an exemplary cooling distribution unit in an energy-saving mode of operation;

[0017] Figure 8 is a schematic diagram showing an exemplary cooling distribution unit in a mixed (hybrid) mode of operation; and

[0018] Fig. 9 is a schematic diagram showing an exemplary cooling distribution unit in a mechanical operating mode. DETAILED DESCRIPTION

[0019] Cooling systems used to remove heat from conditioned spaces (such as IT environments) use a heat transfer fluid (such as air, water, or refrigerant) to transfer thermal energy from indoors to outdoors. Many cooling systems rely on a refrigeration cycle as the primary cooling means. Pumped refrigerant systems provide isolation between the primary heat rejection system and the IT equipment. Direct and indirect air methods rely on outdoor conditions as the primary cooling means, which makes them more effective in mild climates.

[0020] Although the examples discussed herein relate to IT environments, the methods and systems discussed in the present disclosure may be applied to any confined space (also referred to herein as a "conditioned space"), such as a room, a building interior, or other structure containing air to be cooled. For example, the space to be cooled may be one or more rooms in a public or private building, such as a private residence, an office space, or other commercial or municipal space, or may include spaces in an industrial or manufacturing complex. Furthermore, more than one cooling device may be used for cooling.

[0021] In some embodiments, the space being cooled is a data center or IT environment. A data center may include one or more rooms or spaces containing multiple rows of equipment racks designed to house electronic equipment (e.g., data processing, network, and telecommunications equipment). During operation, the electronic equipment generates heat that needs to be removed to ensure continued performance, reliability, and service life of the equipment components housed by the equipment racks. One or more embodiments of the system disclosed herein are designed to remove heat generated by electronic equipment within a data center and return cool air to the data center.

[0022] One example of a heat rejection method in an IT environment includes rows of equipment paired with dry cooling units. Dry cooling units, also referred to herein as "dry heat rejection units" or "outdoor heat exchangers," are a type of heat exchanger in which air is used to cool a transport fluid (i.e., glycol) flowing through a cooling coil. Another example of a heat rejection method is to use a chiller or "wet" cooler.

[0023] In this type of system, the refrigeration cycle components (e.g., dry cooling units) can be located in a housing outside the cooled space, and the heat exchanger can be located in the cooled space. The heat exchanger uses flowing glycol to collect heat from the refrigerant of the refrigeration unit and transport it away from the IT environment. The glycol flows through a pipe to the dry cooling unit, where the heat is discharged to the outside atmosphere. Pumps and other components such as motors are used to circulate the glycol in and out of the refrigeration unit and the dry cooling unit in its circuit. However, embodiments of the present disclosure place the cooling distribution unit in the cooled space.

[0024] refer to Figure 1 One method of cooling electronic equipment employs a liquid cooling architecture that includes a cooling distribution unit, sometimes referred to as a CDU, and generally indicated at 10. As technology related to liquid cooling has emerged, the cooling distribution unit 10 is configured to distribute cooling fluid between a refrigeration unit (e.g., a chiller or dry cooling unit) and various servers. In one embodiment, the cooling distribution unit 10 includes a water or water / glycol unit having a plate exchanger for distributing the fluid and a series of pumps having fixed or variable speeds. The distribution of the fluid used within the cooling distribution unit 10 can be accomplished using different techniques and methods.

[0025] refer to Figure 2 , a row of liquid-cooled IT racks represented by 20 is cooled by a cooling fluid provided by a refrigeration machine and / or dry cooler represented by 22 through a cooling distribution unit 24. As shown, the unit 22 that produces the cooling fluid is mainly a refrigeration machine with a built-in free cooling / economy system, or a dry cooling unit. These units 22 can be large in cooling capacity and are usually placed outdoors and on the roof of the data center. Liquid cooling applications require operating temperatures higher than those traditionally required for air-cooled IT applications, which has led to an increase in the application of economizers such as dry cooling units, cooling towers, etc. Even in applications with integrated free cooling refrigeration machines or water-cooled refrigeration machines connected to dry cooling units, the number of hours per year contributed by the compressor (mechanical operation) is also decreasing, and will decrease in the future compared to the past.

[0026] refer to Figure 3, a first row of IT racks represented by 30 and a second row of IT racks represented by 32 are cooled by a cooling fluid provided by a chiller and / or a dry cooler represented by 34 via a cooling distribution unit 36. In the illustrated embodiment, the first row of IT racks includes air-cooled IT racks that require a lower cooling temperature, and the second row of IT racks includes liquid-cooled IT racks that require a higher cooling temperature. The cooling distribution unit 36 ​​is configured to deliver (sometimes referred to as output) a cooling fluid at a first temperature to the first row of liquid-cooled IT racks 30, and to deliver a cooling fluid at a second temperature to the second row of liquid-cooled IT racks 32, as described above, the second temperature may be higher than the first temperature. It is expected that in liquid cooling applications, it is not possible to discharge all the heat generated by the servers. For this reason, a certain percentage of the heat must be discharged through a conventional air cooling system. In some data center applications, not all servers are liquid-cooled, but some of them may require air cooling. In both cases, the heat is distributed to at least two different temperature levels by the system.

[0027] For the cooling distribution unit described herein, positive pressure means that the water pressure at the servers of the liquid-cooled IT rack is higher than the atmospheric pressure. In this case, the architecture is usually operated by a flow-through pump. Negative pressure means that the water pressure at the servers of the liquid-cooled IT rack is lower than the atmospheric pressure. In this case, the architecture is operated by a flow-through pump installed after the server or by an ejector, or generally by a device capable of maintaining a pressure lower than the atmospheric pressure, which will be described in more detail below.

[0028] Embodiments of the present disclosure are configured to be used within any type of data center, including new data centers, existing data centers, and hybrid data centers. For new data centers, the ability to install a motorized CDU indoors makes it possible to utilize the entire exterior space available for energy-saving systems (insulated or non-insulated), thus having the maximum possible available surface without having to dedicate space to cooling units with compressors. Existing data centers may have consistent limitations on the impact on the hydraulic architecture compared to water-cooled chillers and dry cooling units. The already existing hydraulic infrastructure can be simplified. Furthermore, a modular approach is allowed because the customer does not have to completely change this infrastructure. For hybrid data centers, dual set points can be utilized, without having to choose a lower set point when there is only one set point, thereby reducing the efficiency of the entire system.

[0029] Embodiments of the present disclosure are directed to providing an indoor cooling unit that contains all the typical devices of a cooling distribution unit, but at the same time integrates a complete refrigeration circuit that can operate when the external economizer is no longer sufficient, therefore in very high ambient temperature conditions. Furthermore, this concept allows to place units with different set points from each other in separate data centers, without being forced to have only one outdoor large chiller on the roof with a water set point equal to the minimum between the required temperatures, and therefore operating at its worst efficiency.

[0030] The motorized cooling distribution unit can be connected on one side to a liquid cooling system (working with negative or positive pressure) and on the other side to an energy saving system located externally.

[0031] Embodiments of the present disclosure also contemplate different operating modes, including energy-saving mode, mixed (hybrid) mode and mechanical mode. For each operating mode, it is indicated which valves are open or closed, and whether the compressor is running.

[0032] Reference Figure 4 , a cooling distribution unit is generally indicated at 40. As shown, the cooling distribution unit is connected to a dry cooling unit 42, which, as described above, can be located outside of the data center facility. The cooling distribution unit 40 can be located within the data center facility. The dry cooling unit 42 is configured to receive a relatively warm cooling fluid from the cooling distribution unit 40 and to deliver a relatively cool cooling fluid to the cooling distribution unit. Any suitable medium can be used as the cooling fluid, including water, a water / ethylene glycol mixture, or a liquid refrigerant.

[0033] The cooling distribution unit 40 includes a refrigeration unit, generally indicated at 44, having a condenser 46, a thermal expansion valve 48 (sometimes referred to herein simply as a valve), an evaporator 50, and a compressor 52, which operate together to produce a vapor compression cycle. As is well known, vapor compression systems use a circulating liquid refrigerant as a cooling medium to absorb and reject heat from a space or medium to be cooled. The circulating refrigerant enters the compressor 52 in a thermodynamic state known as saturated vapor and is compressed to a higher pressure, resulting in a higher temperature. The hot compressed vapor is then in a thermodynamic state known as superheated vapor, and is at a temperature and pressure that can be condensed by cooling water or cooling air flowing through the coils or pipes.

[0034] The superheated vapor then passes through the condenser 46, where heat is transferred from the circulating refrigerant to the external medium, allowing the gaseous refrigerant to cool and condense into a liquid. The rejected heat is carried away by water or air, depending on the type of condenser. The condensed liquid refrigerant, which is in a thermodynamic state known as a saturated liquid, is next directed through a thermal expansion valve 48, where the saturated liquid undergoes a sudden drop in pressure, which lowers the temperature of the liquid and vapor refrigerant mixture to a temperature that is colder than the temperature of the enclosed space to be refrigerated. The cold refrigerant liquid and vapor mixture is then directed through the coils or pipes in the evaporator 50. The air in the enclosed space circulates in the coils or pipes due to thermal convection or a fan. Since the air is hotter than the cold liquid refrigerant, heat is transferred, thereby cooling the air and causing the liquid to evaporate, returning it to a gaseous state while absorbing heat. To complete the refrigeration cycle, the refrigerant vapor from the evaporator 50 is again a saturated vapor and is directed back to the compressor 52.

[0035] like Figure 4 As shown, a supply line 54 is provided to deliver a cooling fluid in a relatively cool state (sometimes referred to herein as a first cooling fluid) from the dry cooling unit 42 to the condenser 46 of the refrigeration unit 44, and a return line 56 is provided to return the cooling fluid in a relatively warmed or heated state from the condenser of the refrigeration unit to the dry cooling unit. As shown, the supply line 54 includes a valve 58, a pump 60, and a three-way valve 62 to control the delivery of the relatively cool cooling fluid. The three-way valve 62 can be controlled to transfer some or all of the cooling fluid from the supply line 54 to the return line 56.

[0036] The cooling distribution unit 40 also includes a heat exchanger 64 in fluid communication with the evaporator 50 of the refrigeration unit 44. Specifically, a supply line 66 is provided to deliver a cooling fluid (sometimes referred to herein as a third cooling fluid) in a relatively cooling state from the evaporator 50 of the refrigeration unit 44 to the heat exchanger 64, and a return line 68 is provided to return the cooling fluid in a relatively warming or heating state from the heat exchanger to the evaporator of the refrigeration unit. In one embodiment, the cooling fluid is a water / ethylene glycol mixture, and the heat exchanger 64 is a brazed plate heat exchanger. As shown, a pump 70 is provided in the supply line 66 to move the cooling fluid from the evaporator 50 of the refrigeration unit 44 to the heat exchanger 64. A valve 72 is provided in the return line 68 to control the amount of cooling fluid from the heat exchanger 64 to the evaporator 50 of the refrigeration unit 44. The return line 68 is also in fluid communication with the return line 56 that connects the condenser 46 of the refrigeration unit 44 to the dry cooling unit through a line 74. After the valve 72, another line 76 is provided from the supply line 54 to the return line 68. The line 76 includes a valve 78, which may be provided between the supply line 54 connecting the dry cooling unit 42 to the condenser 46 of the refrigeration unit 44 and the return line 68 connecting the heat exchanger 64 to the evaporator 50 of the refrigeration unit 44. Another line 80 is provided between the line 76 and the supply line 54, and a valve 82 is provided to control the flow of cooling fluid through the line 80.

[0037] As described above, supply line 66 includes pump 70 to move cooling fluid from evaporator 50 of refrigeration unit 44 to heat exchanger 64. Return line 68 includes valve 72 to control the flow of cooling fluid delivered by heat exchanger 64 to evaporator 50 of refrigeration unit 44. Further control is provided by valves 78 and 82 associated with line 77 in fluid communication with return line 68.

[0038] The heat exchanger 64 is also configured to include a supply line 84 for delivering a cooling fluid (sometimes referred to herein as a second cooling fluid) in a relatively cool state to a liquid cooling equipment rack 86, and a return line 88 for returning the cooling fluid in a relatively warmed or heated state to the heat exchanger 64. As shown, the supply line 84 includes a first supply line portion 84a for delivering a first portion of the cooling fluid to an electronic device located in the liquid cooling equipment rack 86, and a second supply line portion 84b for delivering a second portion of the cooling fluid to another electronic device located in the liquid cooling equipment rack 86 or another liquid cooling equipment rack. Similarly, the return line 88 includes a first return line portion 88a for delivering the first portion of the cooling fluid to the heat exchanger 64 and a second return line portion 88b for delivering the second portion of the cooling fluid to the heat exchanger 64.

[0039] In the illustrated embodiment, the first supply line portion 84a includes a variable speed pump 90 to move a first portion of the cooling fluid to the liquid cooling equipment rack 86. The second supply line portion 84b includes a variable speed pump 92 to move a second portion of the cooling fluid to the liquid cooling equipment rack 86. A three-way valve 94 is provided and in fluid communication with the first supply line portion 84a and the first return line 88a to control the amount of the first portion of the cooling fluid flowing into and out of the liquid cooling equipment rack 86. Similarly, a three-way valve 96 is provided and in fluid communication with the second supply line portion 84b and the second return line portion 88b to control the amount of the second portion of the cooling fluid flowing into and out of the liquid cooling equipment rack 86.

[0040] It should be noted that the three-way valve 94 may be referred to herein as a first control valve and the three-way valve 96 may be referred to herein as a second control valve. Figure 4 The heat exchanger 64 is shown to be disposed between the refrigeration unit 44 and the first control valve (eg, three-way valve 94) and the second control valve (eg, three-way valve 96), but it should be noted that Figure 4 A schematic representation of the location of the heat exchanger is shown, which may or may not correspond to a physical location. One side of the heat exchanger 64 is coupled to the evaporator 50 of the refrigeration unit 44 and the opposite side of the heat exchanger 64 is coupled to the three-way valves 94 , 96 .

[0041] One aspect of the present disclosure is that by controlling the pumps 90, 92 and the three-way valves 94, 96, the temperature of the cooling fluid delivered by the first supply line portion 84a and the temperature of the cooling fluid delivered by the second supply line portion 84b can be controlled. As described above, it is sometimes desirable to provide cooling fluid to the liquid cooling device at different or varying temperatures. In one example, the variable speed pump 90 and the three-way valve 94 can be configured to deliver a first portion of the cooling fluid through the first supply line portion 84a at a first temperature, such as T1. The variable speed pump 92 and the three-way valve 96 can be configured to deliver a second portion of the cooling fluid through the second supply line portion 84b at a second temperature, such as T2, wherein the second temperature is greater than the first temperature. A suitable temperature sensor can be provided to detect the temperature of the first portion of the cooling fluid in the first supply line portion 84a and the second portion of the cooling fluid in the second supply line portion 84b.

[0042] refer to Figure 5, in another embodiment, a cooling distribution unit is generally indicated at 100. With this embodiment, as will be described in more detail below, in addition to controlling the temperature of the cooling fluid, the pressure of the cooling fluid delivered to one or more liquid cooling equipment racks can be controlled. As shown, the cooling distribution unit 100 is connected to a dry cooling unit 102, which, as described above, can be located outside of a data center facility. As with the cooling distribution unit 40, the cooling distribution unit 100 can be located within a data center facility. The dry cooling unit 102 is configured to receive relatively warm cooling fluid from the cooling distribution unit 100 and deliver relatively cool cooling fluid to the cooling distribution unit.

[0043] The cooling distribution unit 100 includes a refrigeration unit, generally indicated at 104, having a condenser 106, a thermal expansion valve 108, an evaporator 110, and a compressor 112, which operate together to produce a vapor compression cycle. A supply line 114 is provided to deliver a cooling fluid (sometimes referred to herein as a first cooling fluid) in a relatively cool state from the dry cooling unit 102 to the condenser 106 of the refrigeration unit 104, and a return line 116 is provided to return the cooling fluid in a relatively warmed or heated state from the condenser 106 of the refrigeration unit 104 to the dry cooling unit 102. As shown, the supply line 114 includes a valve 118, a pump 120, and a three-way valve 122 to control the delivery of the relatively cool cooling fluid to the condenser 106 of the refrigeration unit 104. The three-way valve 122 can be controlled to deliver part or all of the cooling fluid to the return line 116.

[0044] The cooling distribution unit 100 also includes a heat exchanger 124 in fluid communication with the evaporator 110 of the refrigeration unit 104. Specifically, a supply line 106 is provided to deliver a cooling fluid in a relatively cooled state from the evaporator 110 of the refrigeration unit 104 to the heat exchanger 124, and a return line 128 is provided to return the cooling fluid in a relatively warmed or heated state from the heat exchanger 124 to the evaporator 110 of the refrigeration unit 104. In one embodiment, the cooling fluid is a water / ethylene glycol mixture and the heat exchanger 124 is a brazed plate heat exchanger. As shown, a pump 130 is provided in the supply line 126 to move the cooling fluid from the evaporator 110 of the refrigeration unit 104 to the heat exchanger 124. A valve 132 is provided in the return line 128 to control the amount of cooling fluid from the heat exchanger 124 to the evaporator 110 of the refrigeration unit 104. The return line 128 is further in fluid communication with a return line 116 that connects the condenser 106 of the refrigeration unit 104 to the dry cooling unit via a line 134. After the valve 132, another line 136 is provided from the supply line 114 to the return line 128. The line 136 includes a valve 138 that may be provided between the supply line 114 that connects the dry cooling unit 102 to the condenser 106 of the refrigeration unit 104 and the return line 128 that connects the heat exchanger 124 to the evaporator 110 of the refrigeration unit 104. Another line 140 is provided between the line 136 and the supply line 114, and a valve 142 is provided to control the flow of cooling fluid through the line 140.

[0045] As described above, the supply line 126 includes a pump 130 to move cooling fluid from the evaporator 110 of the refrigeration unit 104 to the heat exchanger 124. The return line 128 includes a valve 132 to control the flow of cooling fluid delivered by the heat exchanger 124 to the evaporator 110 of the refrigeration unit 104. Further control is provided by valves 138 and 142 associated with a line 136 in fluid communication with the return line 128.

[0046] The heat exchanger 124 is further configured to include a supply line 144 for delivering a cooling fluid (sometimes referred to herein as a second cooling fluid) in a relatively cool state to a liquid cooling equipment rack 146, and a return line 148 for returning the cooling fluid in a relatively warmed or heated state to the heat exchanger 124. As shown, the supply line 144 includes a first supply line portion 144a for delivering a first portion of the cooling fluid to an electronic device located in the liquid cooling equipment rack 146, and a second supply line portion 144b for delivering a second portion of the cooling fluid to another electronic device located in the liquid cooling equipment rack 146 or another liquid cooling equipment rack. Similarly, the return line 148 includes a first return line portion 148a for delivering a first portion of the cooling fluid to the heat exchanger 124, and a second return line portion 148b for delivering a second portion of the cooling fluid to the heat exchanger 124. In the illustrated embodiment, the first supply line portion 144a includes a variable speed pump 150 to move the first portion of the cooling fluid to the liquid cooling equipment rack 146. A three-way valve 152 is provided and in fluid communication with the first supply line portion 144a and the first return line 148a to control the amount of the first portion of the cooling fluid flowing into and out of the liquid cooling equipment rack 146. Another three-way valve 154 is provided and in fluid communication with the second supply line portion 144b and the second return line 148b to control the amount of the second portion of the cooling fluid flowing into and out of the liquid cooling equipment rack 146.

[0047] The second supply line portion 144b includes a throttle valve 156 to control the flow of the second portion of the cooling fluid to the liquid cooling equipment rack 146. In addition, the second return line 148b includes a variable speed pump 158 to move the second portion of the cooling fluid from the liquid cooling equipment rack 146 to the heat exchanger 124. The purpose of the throttle valve 156 and the variable speed pump 158 will be described in more detail below. A purge valve 160 is provided to release air from the second supply line portion 144b.

[0048] It should be noted that the three-way valve 152 may be referred to herein as a first control valve, and the three-way valve 154 may be referred to herein as a second control valve. Figure 5 The heat exchanger 124 is shown to be disposed between the refrigeration unit 104 and the first control valve (eg, three-way valve 152) and the second control valve (eg, three-way valve 154), but it should be noted that Figure 5 A schematic representation of the location of the heat exchanger is shown, which may or may not correspond to a physical location. One side of the heat exchanger 124 is coupled to the evaporator 110 of the refrigeration unit 104 , while the opposite side of the heat exchanger 124 is coupled to the three-way valves 152 , 154 .

[0049] One aspect of the present disclosure is that by controlling the pump 150 and the three-way valves 152, 154, the temperature of the cooling fluid delivered by the first supply line portion 144a and the temperature of the cooling fluid delivered by the second supply line portion 144b can be controlled. As previously mentioned, it is sometimes necessary to provide cooling fluid to the liquid cooling device at different or varying temperatures. In one example, the variable speed pump 150 and the three-way valve 152 can be configured to deliver a first portion of the cooling fluid through the first supply line portion 144a at a first temperature (e.g., T1). The throttle valve 156, the variable speed pump 158, and the three-way valve 154 can be configured to deliver a second portion of the cooling fluid through the second supply line portion 144b at a second temperature (e.g., T2), wherein the second temperature is greater than the first temperature. A suitable temperature sensor can be provided to detect the temperature of the first portion of the cooling fluid in the first supply line portion 144a and the second portion of the cooling fluid in the second supply line portion 144b.

[0050] Another aspect of the present disclosure is that by controlling the throttle valve 156 and the pump 158, the pressure of the second portion of the cooling fluid can be controlled. It may be desirable to deliver a cooling fluid below atmospheric pressure. For example, in a configuration to avoid leakage, delivering fluid at atmospheric pressure will help prevent any such leakage. By manipulating the throttle valve 156 and the pump 158, the pressure of the second portion of the cooling fluid passing through the second supply line portion 144b can be reduced. In one example, the pump 150 and the three-way valve 152 can be configured to deliver the first portion of the cooling fluid through the first supply line portion 144a at a first pressure (e.g., P1). The throttle valve 156, the pump 158, and the three-way valve 154 can be configured to deliver the second portion of the cooling fluid through the second supply line portion 144b at a second pressure (e.g., P2), wherein the second pressure is greater than the first pressure.

[0051] refer to Figure 6 In another embodiment, a cooling distribution unit is generally indicated at 170. With this embodiment, as will be described in more detail below, in addition to controlling the temperature of the cooling fluid, the pressure of the cooling fluid delivered to one or more liquid-cooled equipment racks can be controlled, which is an alternative to the cooling distribution unit 100. As shown, the cooling distribution unit 170 is connected to a dry cooling unit 172, which, as described above, can be located outside of the data center facility. As with the cooling distribution units 40, 100, the cooling distribution unit 170 can be located within the data center facility. The dry cooling unit 172 is configured to receive relatively warm cooling fluid from the cooling distribution unit 170 and deliver relatively cool cooling fluid to the cooling distribution unit.

[0052] The cooling distribution unit 170 includes a refrigeration unit generally indicated at 174, which has a condenser 176, a thermal expansion valve 178, an evaporator 180, and a compressor 182, which operate together to produce a vapor compression cycle. A supply line 184 is provided to deliver a cooling fluid (sometimes referred to herein as a first cooling fluid) in a relatively cool state from the dry cooling unit 172 to the condenser 176 of the refrigeration unit 174, and a return line 186 is provided to return the cooling fluid in a relatively warmed or heated state from the condenser 176 of the refrigeration unit 174 to the dry cooling unit 172. As shown, the supply line 184 includes a valve 188, a pump 190, and a three-way valve 192 to control the delivery of the relatively cold cooling fluid. The three-way valve 192 can be controlled to deliver part or all of the cooling fluid to the return line 186.

[0053] The cooling distribution unit 170 also includes a heat exchanger 194 in fluid communication with the condenser 176 of the refrigeration unit 174. Specifically, a supply line 196 is provided to deliver a cooling fluid (sometimes referred to herein as a third cooling fluid) in a relatively cooled state from the evaporator 180 of the refrigeration unit 174 to the heat exchanger 194, and a return line 198 is provided to return the cooling fluid in a relatively warmed or heated state from the heat exchanger to the evaporator 180 of the refrigeration unit 174. In one embodiment, the cooling fluid is a water / ethylene glycol mixture and the heat exchanger is a brazed plate heat exchanger. As shown, a pump 200 is provided in the supply line 196 to move the cooling fluid from the evaporator 180 of the refrigeration unit 174 to the heat exchanger 194. A valve 202 is provided in the return line 198 to control the amount of cooling fluid from the heat exchanger 194 to the evaporator 180 of the refrigeration unit 174. The return line 198 is also in fluid communication with the return line 186 that connects the condenser 176 of the refrigeration unit 174 to the dry cooling unit via the line 204. After the valve 202, another line 206 is provided from the supply line 184 to the return line 198. The line 206 includes a valve 208 that may be provided between the supply line 184 that connects the dry cooling unit 172 to the condenser 176 of the refrigeration unit 174 and the return line 198 that connects the heat exchanger 194 to the evaporator 180 of the refrigeration unit 174. Another line 210 is provided between the line 206 and the supply line 184, and a valve 212 is provided to control the flow of cooling fluid through the line 210.

[0054] The heat exchanger 194 is also configured to include a supply line 214 for delivering a cooling fluid (sometimes referred to herein as a second cooling fluid) in a relatively cool state to a liquid cooling equipment rack 216, and a return line 218 for returning the cooling fluid in a relatively warmed or heated state to the heat exchanger 194. As described above, the supply line 196 includes a pump 200 to move the cooling fluid from the evaporator 180 of the refrigeration unit 174 to the heat exchanger 194. The return line 198 includes a valve 202 to control the flow of the cooling fluid delivered by the heat exchanger 194 to the evaporator 180 of the refrigeration unit 174. Further control is provided by valves 208 and 212 associated with a line 206 in fluid communication with the return line 198.

[0055] As shown, the supply line 214 includes a first supply line portion 214a for delivering a first portion of the cooling fluid to an electronic device located in the liquid cooling equipment rack 216, and a second supply line portion 214b for delivering a second portion of the cooling fluid to another electronic device located in the liquid cooling equipment rack 216 or another liquid cooling equipment rack. Similarly, the return line 218 includes a first return line portion 218a for delivering the first portion of the cooling fluid to the heat exchanger 194 and a second return line portion 218b for delivering the second portion of the cooling fluid to the heat exchanger 194. In the illustrated embodiment, the first supply line portion 214a includes a variable speed pump 220 to move the first portion of the cooling fluid to the liquid cooling equipment rack 216. A three-way valve 222 is provided and is in fluid communication with the first supply line portion 214a and the first return line portion 218a to control the amount of the first portion of the cooling fluid flowing into and out of the liquid cooling equipment rack 216. Another three-way valve 224 is provided and in fluid communication with the second supply line portion 214 b and the second return line portion 218 b to control the amount of the second portion of cooling fluid flowing into and out of the liquid cooling equipment rack 216 .

[0056] The second supply line portion 214b includes a throttle valve 226 to control the flow of the second portion of the cooling fluid to the liquid cooling equipment rack 216. In addition, the second return line portion 218b includes a variable speed pump 228 to move the second portion of the cooling fluid from the liquid cooling equipment rack 216 to the heat exchanger 194. The purpose of the throttle valve 226 and the variable speed pump 228 will be described in more detail below. In addition, the second return line portion 218b includes an ejector 230 located after the variable speed pump 228. The ejector 230 is a vacuum pump type that generates a vacuum through the Venturi effect. With the ejector 230, the working fluid flows through a nozzle into a pipe whose cross-sectional area first narrows and then expands. A purge valve 232 is provided to release air from the second supply line portion 214b.

[0057] It should be noted that the three-way valve 222 may be referred to herein as a first control valve, and the three-way valve 224 may be referred to herein as a second control valve. Figure 6 The heat exchanger 194 is shown to be disposed between the refrigeration unit 174 and the first control valve (eg, three-way valve 222) and the second control valve (eg, three-way valve 224), but it should be noted that Figure 4 A schematic representation of the location of the heat exchanger is shown, which may or may not correspond to a physical location. One side of the heat exchanger 194 is coupled to the evaporator 180 of the refrigeration unit 174 , while the opposite side of the heat exchanger 194 is coupled to the three-way valves 222 , 224 .

[0058] One aspect of the present invention is that by controlling the pump 220 and the three-way valves 222, 224, the temperature of the cooling fluid delivered by the first supply line portion 214a and the temperature of the cooling fluid delivered by the second supply line portion 214b can be controlled. As previously mentioned, it is sometimes necessary to provide cooling fluid to the liquid cooling device at different or varying temperatures. In one example, the variable speed pump 220 and the three-way valve 222 can be configured to deliver a first portion of the cooling fluid through the first supply line portion 214a at a first temperature (e.g., T1). The throttle valve 226, the variable speed pump 228, and the three-way valve 224 can be configured to deliver a second portion of the cooling fluid through the second supply line portion 214b at a second temperature (e.g., T2), wherein the second temperature is greater than the first temperature. A suitable temperature sensor can be provided to detect the temperature of the first portion of the cooling fluid in the first supply line portion 214a and the second portion of the cooling fluid in the second supply line portion 214b.

[0059] Another aspect of the present disclosure is that by controlling the throttle valve 226 and the pump 228 and the ejector 230, the pressure of the second portion of the cooling fluid can be controlled. It may be desirable to deliver a cooling fluid below atmospheric pressure. For example, in a configuration where leakage is to be avoided, delivering the fluid at atmospheric pressure will help prevent any such leakage. The pressure of the second portion of the cooling fluid can be reduced by manipulating the throttle valve 226, the pump 228 and the ejector 230. The ejector 230 is also provided to more carefully regulate the pressure of the second portion of the cooling fluid and enable a smaller variable speed pump 228. In one example, the pump 220 can be configured to deliver the first portion of the cooling fluid through the first supply line portion 214a at a first pressure (e.g., P1). The throttle valve 226 and the pump 228 and the ejector 230 can be configured to deliver the second portion of the cooling fluid through the second supply line portion 214b at a second pressure (e.g., P2), wherein the second pressure is greater than the first pressure.

[0060] Various aspects of the cooling distribution units 40, 100, 170 described herein may be controlled by one or more computer systems or controllers. For example, the pumps and valves described herein may be controlled by one or more controllers. In one embodiment, a controller 98 is provided to control the cooling distribution unit 40, a controller 162 is provided to control the cooling distribution unit 100, and a controller 234 is provided to control the cooling distribution unit 170. Various sensors are also coupled to the controllers.

[0061] Various controllers can perform the various operations discussed above. Using the data stored in the relevant memory and / or storage device, the controller also executes one or more instructions stored on one or more non-transitory computer-readable media, and the controller may include and / or be connected to one or more non-transitory computer-readable media, which can generate manipulated data. In some examples, the controller may include one or more processors or other types of controllers. In one example, the controller is or includes at least one processor. In another example, in addition to a general-purpose processor, or instead of a general-purpose processor, the controller uses a dedicated integrated circuit suitable for performing a specific operation to perform at least a part of the above-mentioned operations. As shown in these examples, many specific combinations of hardware and software can be used according to the examples of the present disclosure to perform the operations described herein, and the present disclosure is not limited to any specific combination of hardware and software components. The examples of the present disclosure may include a computer program product configured to perform the above-mentioned methods, processes and / or operations. The computer program product may be or include one or more controllers and / or processors configured to execute instructions to perform the above-mentioned methods, processes and / or operations.

[0062] refer to Figure 7 , refer to Figure 5 , a first operating mode, sometimes referred to as an economizer or free cooling operating mode, can be used when the outside temperature is low enough to cool the cooling fluid to a degree that warm or hot air can be cooled to a set point temperature without using a refrigeration unit. In this operating mode, the compressor 112 of the refrigeration unit 104 is in an off position. In addition, valve 118 is closed to cut off the supply of the first cooling fluid from the dry cooling unit 102 to the condenser 106 of the refrigeration unit 104. In addition, valve 132 is closed to cut off the return of the third cooling fluid from the heat exchanger 124 to the evaporator 110 of the refrigeration unit 104. In addition, valves 138 and 142 are opened and closed, respectively.

[0063] refer to Figure 8 , also refer to Figure 5In the various aspects of the cooling distribution unit 100 shown in the second operation mode, sometimes referred to as a hybrid operation mode, the second operation mode, sometimes referred to as a hybrid operation mode, can be used in the case where the cooling fluid can be implemented for at least partial free cooling when the external temperature is cooled. In the hybrid mode, the refrigeration unit 104 contributes to cooling. In the hybrid mode, the evaporator 110 of the refrigeration unit 104 can be operated at a lower setting than the mechanical mode (described below), which reduces energy consumption. In this operation mode, the compressor 112 of the refrigeration unit is in an open position. In addition, valve 118 is closed to cut off the supply of the first cooling fluid from the dry cooling unit 102 to the condenser 106 of the refrigeration unit 104. Another valve 132 is closed to cut off the return of the third cooling fluid from the heat exchanger 124 to the evaporator 110 of the refrigeration unit 104. In addition, valves 138 and 142 are all opened.

[0064] refer to Fig. 9 , also refer to Figure 5 The aspects of the cooling distribution unit 100 shown, when the outdoor air is too hot or too humid to support the inlet set point, can implement a third operating mode, sometimes referred to as a mechanical operating mode, in which the refrigeration unit 104 operates as a normal closed loop system. In this operating mode, the compressor 112 of the refrigeration unit is in an open position. In addition, valve 118 is opened to provide fluid communication from the dry cooling unit 102 to the condenser 106 of the refrigeration unit via the supply line 114. In addition, valve 132 is opened to return the warmed or heated cooling fluid from the heat exchanger 124 to the evaporator 110 of the refrigeration unit 132. In addition, valves 138, 142 are closed.

[0065] The various aspects disclosed herein according to the present disclosure are not limited in their application to the details of the construction and arrangement of the parts set forth in the following description or shown in the accompanying drawings. These aspects can adopt other embodiments and can be practiced or executed in various ways. The examples of specific embodiments provided here are only for illustrative purposes, not for limitation. Specifically, the actions, parts, elements and features discussed in conjunction with any one or more embodiments are not intended to be excluded from similar roles in any other embodiments.

[0066] In addition, the wording and terminology used herein are for descriptive purposes and should not be considered restrictive. Any reference to the examples, embodiments, parts, elements or actions of the systems and methods mentioned herein in the singular form may also cover embodiments that include multiple embodiments, and any reference to any embodiments, parts, elements or actions mentioned herein in the plural form may also cover embodiments that only include the singular. References in the singular or plural form are not intended to limit the currently disclosed systems or methods, their parts, actions or elements. "Including", "including", "having", "containing", "involving" and their variants used herein mean to include the items listed thereafter and their equivalents and additional items. References to "or" may be interpreted as inclusive, so that any term described using "or" may represent any of the terms of a single, more than one and all descriptions. In addition, in the case of inconsistent term usage between this document and the documents incorporated herein by reference, the term usage in the incorporated reference is a supplement to this document; for irreconcilable inconsistencies, the term usage in this document shall prevail.

[0067] Therefore, having described at least one example of multiple aspects, it should be understood that those skilled in the art will readily think of various changes, modifications and improvements. For example, the examples disclosed herein may also be used in other contexts. Such changes, modifications and improvements are intended to be part of this disclosure and are intended to be within the scope of the examples discussed herein. Therefore, the foregoing description and drawings are merely exemplary.

Claims

1. A cooling distribution unit, comprising: a refrigeration unit configured to be coupled to the dry cooling unit, the refrigeration unit configured to receive the first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit for cooling; a first control valve coupled to the refrigeration unit, the first control valve configured to output a first portion of the second cooling fluid at a first temperature; as well as A second control valve is coupled to the refrigeration unit, the second control valve being configured to output a second portion of the second cooling fluid at a second temperature. 2 . The cooling distribution unit of claim 1 , further comprising a pump on a return line of the second portion of the second cooling fluid, the pump being configured to control a pressure of the second portion of the second cooling fluid output by the second control valve.

3. The cooling distribution unit of claim 2, further comprising an ejector in fluid communication with the pump to help control the pressure of the second portion of the second cooling fluid output by the second control valve.

4. The cooling distribution unit according to claim 1, wherein: The second portion of the second cooling fluid has a pressure less than atmospheric pressure. 5 . The cooling distribution unit of claim 2 , further comprising a controller configured to selectively control the first control valve, the second control valve, and the pump.

6. The cooling distribution unit according to claim 5, wherein: The controller is also configured to selectively control a compressor of the refrigeration unit to implement at least one of an energy-saving mode, a mechanical mode, or a hybrid operating mode.

7. The cooling distribution unit of claim 6, further comprising at least one temperature sensor in communication with the controller, the controller further configured to determine an operating mode based at least in part on an input signal from the at least one temperature sensor.

8. The cooling distribution unit of claim 1, further comprising a heat exchanger disposed between the refrigeration unit and the first and second control valves.

9. The cooling distribution unit according to claim 8, wherein: The second cooling fluid returns to the heat exchanger in a relatively warm state, and the heat exchanger is configured to cool the second cooling fluid.

10. The cooling distribution unit according to claim 8, wherein: The heat exchanger is coupled to the refrigeration unit, the heat exchanger being configured to receive the third cooling fluid in a relatively cool state from the refrigeration unit and output the third cooling fluid in a relatively warm state to the refrigeration unit for cooling.

11. The cooling distribution unit according to claim 1, wherein: The refrigeration unit includes a condenser, a valve connected to the condenser fluid, an evaporator connected to the valve fluid, and a compressor connected to the evaporator and condenser fluids, the condenser being configured to receive a first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit.

12. The cooling distribution unit of claim 1, further comprising at least one valve between the refrigeration unit and the dry cooling unit, the at least one valve configured to control the amount of first cooling fluid flowing into and out of the dry cooling unit.

13. The cooling distribution unit of claim 1, further comprising a first pump configured to output a first portion of the second cooling fluid and a second pump configured to output a second portion of the second cooling fluid.

14. The cooling distribution unit of claim 1 , further comprising a first pump on a supply line of a first portion of the second cooling fluid, and a second pump on a return line of a second portion of the second cooling fluid, the first pump being configured to control a pressure of the first portion of the second fluid, and the second pump being configured to control a pressure of the second portion of the second cooling fluid.

15. The cooling distribution unit according to claim 1, wherein: The return line of the first portion of the second cooling fluid is coupled to the three-way valve of the supply line of the first portion of the second cooling fluid.

16. The cooling distribution unit according to claim 1, wherein: The return line of the second portion of the second cooling fluid is coupled to the three-way valve of the supply line of the second portion of the second cooling fluid.

17. A method of dispensing a cooling fluid at two different temperatures, the method comprising: providing a cooling fluid to the first control valve and the second control valve; controlling the first control valve to output a first portion of the cooling fluid at a first temperature; as well as The second control valve is controlled to output a second portion of the cooling fluid at a second temperature.

18. The method of claim 17, further comprising controlling a pressure of the second portion of the cooling fluid.

19. The method according to claim 18, wherein: Controlling the pressure includes coupling a pump to a return line of the second portion of the second cooling fluid, the pump configured to control the pressure of the second portion of the cooling fluid output by the second control valve.

20. The method according to claim 18, wherein: Controlling the pressure also includes providing an ejector in fluid communication with the pump to help control the pressure of the second portion of the cooling fluid output by the second control valve.

21. The method according to claim 18, wherein: The second cooling fluid has a pressure less than atmospheric pressure.

22. The method of claim 19, further comprising selectively controlling the first control valve, the second control valve, and the pump of the system with a controller.

23. The method according to claim 22, wherein: The controller is also configured to selectively control a compressor of the refrigeration unit to achieve at least one of an energy-saving mode, a mechanical mode, or a mixed mode operation.

24. The method of claim 17, wherein: The cooling fluid is output by a refrigeration unit coupled to the dry cooling unit.

25. The method according to claim 24, wherein: The refrigeration unit is configured to receive the first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit for cooling.

26. The method according to claim 24, wherein: The first control valve and the second control valve are coupled to the refrigeration unit.

27. The method according to claim 26, wherein: The heat exchanger is disposed between the refrigeration unit and the first and second control valves.

28. A cooling distribution unit comprising: a refrigeration unit configured to be coupled to the dry cooling unit, the refrigeration unit comprising a condenser, a valve in fluid communication with the condenser, an evaporator in fluid communication with the valve, and a compressor in fluid communication with the evaporator and the condenser, the condenser configured to receive a first cooling fluid in a relatively cold state from the dry cooling unit and output the first cooling fluid in a relatively warm state to the dry cooling unit; a heat exchanger coupled to the refrigeration unit, the heat exchanger configured to receive the second cooling fluid in a relatively cool state from the evaporator of the refrigeration unit and output the second cooling fluid in a relatively warm state to the evaporator of the refrigeration unit; a first control valve coupled to the heat exchanger, the first control valve configured to output a first portion of the third cooling fluid from the heat exchanger at a first temperature; a second control valve coupled to the heat exchanger, the second control valve configured to output a second portion of the third cooling fluid from the heat exchanger at a second temperature; as well as A pump is coupled to a return side of the liquid cooling equipment rack, the pump being configured to control a pressure of a second portion of the third cooling fluid output by the second control valve.

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