A data center integrated energy-saving composite cold source system
Patent Information
- Application Number
- CN202522392176.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-11
AI Technical Summary
然而上述方案仅将干冷器与制冷机简单组合，制冷机的冷凝器通过冷却塔的风扇散热，干冷器则通过另一组风扇散热
[0012]上述技术方案具有以下优点或者有益效果：本实用新型提供的一种数据中心一体化节能复合冷源系统，涉及制冷系统技术领域，其包括第一制冷单元和第二制冷单元；第一制冷单元输出自然冷源；第二制冷单元输出机械冷源；设置温度t1；当环境温度小于等于t1时，仅由第一制冷单元对冷源系统服务对象的冷量接收端进行冷却；当环境温度大于t1时，第一制冷单元和第二制冷单元均对冷量接收端进行冷却；同时第一制冷单元还对第二制冷单元的冷凝部进行冷却。本实用新型提供的一种数据中心一体化节能复合冷源系统，通过设置输出自然冷源的第一制冷单元对冷量接收端进行冷却的同时，还可以对第二制冷单元的冷凝部进行冷却，使得仅设置一套散热风扇系统即可满足整个冷却系统的运行需求，有效降低了冷却系统的体积大小和复杂程度。另外通过第二循环回路将第一制冷单元与第二制冷单元的冷凝部串联，无需设置切换阀门即可完成制冷模式的切换，简化了系统且控制方便。
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Figure CN224844537U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration system technology, and in particular to an integrated energy-saving composite cold source system for data centers. Background Technology
[0002] In data center applications, cooling distribution units (CDUs) are needed to connect to heat-generating devices (such as server units) via a cold source, forming a cooling circulation system. The cooling distribution unit acts as a cold energy receiver in the cold source system, transferring cold energy to the heat-generating devices. The primary side of the cooling distribution unit is connected to the cold source to form a loop, while the secondary side is connected to the heat-generating devices to form another loop. The heat generated by the heat-generating devices is transported to the secondary side of the cooling distribution unit via a medium, where it exchanges heat with the medium on the primary side. The cold source then cools the medium on the primary side.
[0003] Currently, the cooling source equipment used in data centers, communication equipment rooms, and other similar applications typically consists of chillers and dry coolers. Under the same cooling efficiency, chillers consume more energy than dry coolers, but their cooling capacity is superior. In summer, when ambient temperatures are high, the temperature difference between the ambient and the heat-generating equipment is small, making dry coolers alone insufficient for cooling needs. In winter, when ambient temperatures are low, the temperature difference between the ambient and the heat-generating equipment is large, leading to excessive cooling output and wasted energy if only chillers are used.
[0004] Therefore, existing technologies employ a combination of a dry cooler and a refrigeration unit. The dry cooler is used for cooling when the temperature difference between the ambient temperature and the heat-generating equipment is large, and the refrigeration unit is used when the temperature difference is small. However, this approach simply combines the dry cooler and the refrigeration unit; the condenser of the refrigeration unit dissipates heat through a cooling tower fan, while the dry cooler dissipates heat through another set of fans. Because this approach uses two sets of cooling fan systems, the entire cooling system becomes excessively large and complex. Utility Model Content
[0005] To address the aforementioned technical problems, this utility model provides an integrated energy-saving composite cooling source system for data centers. By setting up a first refrigeration unit that outputs a natural cold source to cool the receiving end of the cooling load, it can simultaneously cool the condenser section of a second refrigeration unit. This allows only one cooling fan system to meet the operational requirements of the entire cooling system, effectively reducing its size and complexity. Furthermore, by connecting the condenser sections of the first and second refrigeration units in series via a second circulation loop, switching between cooling modes can be completed without the need for switching valves, simplifying the system and facilitating control.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an integrated energy-saving composite cold source system for data centers, including a first refrigeration unit and a second refrigeration unit; the first refrigeration unit outputs a natural cold source; the second refrigeration unit outputs a mechanical cold source; a temperature t1 is set; the specific value of t1 is determined according to the temperature of the environment, the heat dissipation requirements of the object served by the cold source system, and the refrigeration efficiency of the first and second refrigeration units; When the ambient temperature is less than or equal to t1, only the first refrigeration unit cools the cold energy receiving end of the object served by the cold source system; When the ambient temperature is greater than t1, both the first and second refrigeration units cool the cold energy receiving end; at the same time, the first refrigeration unit also cools the condenser section of the second refrigeration unit.
[0007] The present invention provides an integrated energy-saving composite cooling source system for data centers. Preferably, the first refrigeration unit includes a cooler, a first water pump, and a first heat exchanger; the second refrigeration unit includes a compressor, a second heat exchanger, an expansion valve, and a third heat exchanger; and a second water pump is provided at the cooling capacity receiving end. The hot side outlet of the first heat exchanger is connected to the hot side inlet of the third heat exchanger, the hot side outlet of the third heat exchanger is connected to the inlet of the second water pump, the outlet of the second water pump is connected to the inlet of the cold energy receiving end, and the outlet of the cold energy receiving end is connected to the hot side inlet of the first heat exchanger. The hot side of the first heat exchanger, the hot side of the third heat exchanger, the second water pump, and the cold energy receiving end form the first circulation loop; The cold side outlet of the first heat exchanger is connected to the cold side inlet of the second heat exchanger, the cold side outlet of the second heat exchanger is connected to the inlet of the cooler, the outlet of the cooler is connected to the inlet of the first water pump, and the outlet of the first water pump is connected to the cold side inlet of the first heat exchanger. The cold side of the first heat exchanger, the cold side of the second heat exchanger, the cooler, and the first water pump form a second circulation loop; The compressor's outlet is connected to the inlet of the hot side of the second heat exchanger, the liquid outlet of the hot side of the second heat exchanger is connected to the liquid inlet of the expansion valve, the liquid outlet of the expansion valve is connected to the liquid inlet of the cold side of the third heat exchanger, and the outlet of the cold side of the third heat exchanger is connected to the inlet of the compressor. The compressor, the hot side of the second heat exchanger, the expansion valve, and the cold side of the third heat exchanger form a third circulation loop; When the ambient temperature is less than or equal to t1, the second circulation loop cools the hot side of the first heat exchanger.
[0008] When the ambient temperature is greater than t1, the second circulation loop cools the hot side of the first heat exchanger and the hot side of the second heat exchanger, and the third circulation loop cools the hot side of the third heat exchanger.
[0009] The present invention provides an integrated energy-saving composite cold source system for data centers, wherein, preferably, the heat exchange medium of the second circulation loop is cooling water.
[0010] The present invention provides an integrated energy-saving composite cold source system for data centers, wherein, preferably, the heat exchange medium of the third circulation loop is a refrigerant.
[0011] The present invention provides an integrated energy-saving composite cooling source system for data centers, wherein the cooler is preferably a dry cooler.
[0012] The above technical solution has the following advantages or beneficial effects: This utility model provides an integrated energy-saving composite cold source system for data centers, relating to the field of refrigeration system technology. It includes a first refrigeration unit and a second refrigeration unit. The first refrigeration unit outputs a natural cold source; the second refrigeration unit outputs a mechanical cold source. A temperature t1 is set. When the ambient temperature is less than or equal to t1, only the first refrigeration unit cools the cold energy receiving end of the cold source system. When the ambient temperature is greater than t1, both the first and second refrigeration units cool the cold energy receiving end. Simultaneously, the first refrigeration unit also cools the condenser section of the second refrigeration unit. This integrated energy-saving composite cold source system for data centers, by setting a first refrigeration unit that outputs a natural cold source to cool the cold energy receiving end, can also cool the condenser section of the second refrigeration unit, allowing only one cooling fan system to meet the operational needs of the entire cooling system, effectively reducing the size and complexity of the cooling system. Furthermore, by connecting the condenser sections of the first and second refrigeration units in series through a second circulation loop, the switching of cooling modes can be completed without setting a switching valve, simplifying the system and making control convenient. Attached Figure Description
[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0014] Figure 1 A schematic diagram of an integrated energy-saving composite cold source system for a data center provided in Embodiment 1 of this utility model; Figure 1 Includes: 1. Cooler; 11. First water pump; 12. First heat exchanger; 2. Compressor; 21. Second heat exchanger; 22. Expansion valve; 23. Third heat exchanger; 3. Second water pump; 4. Cooling receiver. Detailed Implementation
[0015] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0016] Example 1: like Figure 1 As shown: The cold energy receiving end 4, which serves the cold source system, is used to deliver low-temperature coolant from the cold source to the heat-generating equipment. In the cooling system used for data centers, it belongs to the cold energy distribution unit (CDU). The cold energy distribution unit has a primary side and a secondary side. The primary side of the cold energy distribution unit is the cold energy receiving end 4. The cold energy receiving end 4 is connected to the cooling ends of the first refrigeration unit and the second refrigeration unit to form a circulation loop. The secondary side of the cold energy distribution unit is connected to the heat-generating equipment to form a circulation loop.
[0017] To address the technical problem of excessively large and complex equipment caused by the use of two sets of cooling fan systems in existing refrigeration systems, this utility model provides an integrated energy-saving composite cold source system for data centers, including a first refrigeration unit and a second refrigeration unit. The coolant on the secondary side of the cooling distribution unit absorbs the heat generated by the heat-generating equipment and then circulates the heat to the primary side. The heat transferred to the primary side is then transferred to the first and second refrigeration units through the circulation loop of the primary side, thereby releasing the heat.
[0018] The first refrigeration unit outputs a natural cold source, achieving its refrigeration function by dissipating heat into the atmospheric environment. In specific implementation schemes, a dry cooler or a cooling tower can be selected. The second refrigeration unit outputs a mechanical cold source. In specific implementation schemes, a compression refrigeration device can be selected for the second refrigeration unit. Its core principle is to use a compressor to provide power, enabling the refrigerant (coolant) to convert between gaseous and liquid states. When the refrigerant changes from a gaseous state to a liquid state, it releases heat, and when it changes from a liquid state to a gaseous state, it absorbs heat.
[0019] Because the cooling efficiency required by heat-generating equipment varies with different ambient temperatures, the cooling system needs to expand its cooling temperature range. When the ambient temperature is low and low cooling efficiency is not required, the cooling system can output less cooling capacity than conventional cooling equipment to meet the demand, while also reducing energy consumption. The specific solution is as follows: The first refrigeration unit includes a cooler 1, a first water pump 11, and a first heat exchanger 12; the second refrigeration unit includes a compressor 2, a second heat exchanger 21, an expansion valve 22, and a third heat exchanger 23; the cooling capacity receiving end 4 is equipped with a second water pump 3; The hot side outlet of the first heat exchanger 12 is connected to the hot side inlet of the third heat exchanger 23. The hot side outlet of the third heat exchanger 23 is connected to the inlet of the second water pump 3. The outlet of the second water pump 3 is connected to the inlet of the cold energy receiving end 4. The outlet of the cold energy receiving end 4 is connected to the hot side inlet of the first heat exchanger 12. The hot side of the first heat exchanger 12, the hot side of the third heat exchanger 23, the second water pump 3, and the cold energy receiving end 4 form the first circulation loop; The cold-side outlet of the first heat exchanger 12 is connected to the cold-side inlet of the second heat exchanger 21, the cold-side outlet of the second heat exchanger 21 is connected to the inlet of the cooler 1, the outlet of the cooler 1 is connected to the inlet of the first water pump 11, and the outlet of the first water pump 11 is connected to the cold-side inlet of the first heat exchanger 12. The cold side of the first heat exchanger 12, the cold side of the second heat exchanger 21, the cooler 1, and the first water pump 11 form a second circulation loop; The outlet of compressor 2 is connected to the inlet of the hot side of the second heat exchanger 21, the outlet of the hot side of the second heat exchanger 21 is connected to the inlet of the expansion valve 22, the outlet of the expansion valve 22 is connected to the inlet of the cold side of the third heat exchanger 23, and the outlet of the cold side of the third heat exchanger 23 is connected to the inlet of compressor 2. The compressor 2, the hot side of the second heat exchanger 21, the expansion valve 22 and the cold side of the third heat exchanger 23 form a third circulation loop; The temperature t1 is set, and its specific value is determined based on the ambient temperature, the heat dissipation requirements of the object served by the cold source system, and the cooling efficiency of the first and second refrigeration units. Generally, t1 is the highest ambient temperature that the first refrigeration unit can meet the cooling requirements of. When the ambient temperature is less than or equal to t1, the integrated energy-saving composite cold source system for data centers provided by this invention uses only the first refrigeration unit for cooling. When the ambient temperature is greater than t1, the second refrigeration unit is the primary cooling unit, with the first refrigeration unit playing a secondary role. Simultaneously, the first refrigeration unit also provides a cold source for the refrigerant condensation process of the second refrigeration unit, achieving the goal of energy saving.
[0020] This utility model provides an integrated energy-saving composite cooling source system for data centers. By setting up a first refrigeration unit that outputs natural cold source to cool the receiving end of the cooling load, it can simultaneously cool the condenser section of a second refrigeration unit. This allows only one cooling fan system to meet the operational requirements of the entire cooling system, effectively reducing the size and complexity of the cooling system. Furthermore, by connecting the condenser sections of the first and second refrigeration units in series via a second circulation loop, switching between cooling modes can be completed without the need for switching valves, simplifying the system and making control convenient.
[0021] This utility model provides an integrated energy-saving composite cold source system for data centers, which has two working modes; Mode 1: When the ambient temperature is less than or equal to t1, the second circulation loop cools the hot side of the first heat exchanger 12. Specifically, the second water pump 3 operates to circulate the cooling water in the first circulation loop; the first water pump 11 operates to circulate the cooling water in the second circulation loop; the compressor 2 does not operate, and the third circulation loop does not participate in the cooling operation; the first circulation loop transfers the heat from the cold energy receiving end 4 to the first heat exchanger 12, and the second circulation loop transfers the heat from the first heat exchanger 12 to the cooler 1, and the heat is discharged into the atmosphere by the cooler 1.
[0022] At this time, since the ambient temperature is low and there is no excessive demand for cooling, only the first refrigeration unit that outputs natural cold source is used to cool the cooling receiver 4; specifically, the cooling receiver 4 transfers heat to the hot side of the first heat exchanger 12 through the first circulation loop, and the cooler 1 cools the hot side of the first heat exchanger 12 through the second circulation loop.
[0023] Mode 2: When the ambient temperature is greater than t1, the second circulation loop cools the hot side of the first heat exchanger 12 and the hot side of the second heat exchanger 21, and the third circulation loop cools the hot side of the third heat exchanger 23. Specifically: the second water pump 3 operates to circulate the cooling water in the first circulation loop; the first water pump 11 operates to circulate the cooling water in the second circulation loop; and the compressor 2 operates to circulate the refrigerant in the third circulation loop.
[0024] At this time, due to the high ambient temperature, there is a certain demand for cooling capacity. Therefore, the first refrigeration unit and the second refrigeration unit work simultaneously. Specifically, the cooling capacity receiving end 4 transfers heat to the hot side of the first heat exchanger 12 and the hot side of the third heat exchanger 23 through the first circulation loop. The cooler 1 cools the hot side of the first heat exchanger 12 through the second circulation loop. At the same time, the cooler 1 also cools the hot side of the second heat exchanger 21 through the second circulation loop. The refrigerant compressed by the compressor 2 and delivered to the hot side of the second heat exchanger 21 is cooled down, so that the high temperature and high pressure gaseous refrigerant becomes a high pressure liquid. After passing through the expansion valve 22, the refrigerant becomes a low temperature and low pressure liquid, and at the same time absorbs a large amount of heat to cool the hot side of the third heat exchanger 23.
[0025] This utility model provides an integrated energy-saving composite cooling system for data centers. By setting up a first cooling unit that outputs natural cooling and a second cooling unit that outputs mechanical cooling, it performs composite cooling according to different ambient temperatures. When the ambient temperature is low, only the natural cooling is activated to reduce energy consumption. When the ambient temperature is high, both the mechanical and natural cooling sources are activated simultaneously, and the natural cooling source is used to condense and cool the mechanical cooling source. This improves the cooling system's adjustment range for ambient temperature, avoids energy waste caused by excessive cooling output, and effectively reduces operating costs.
[0026] In a preferred embodiment, the heat exchange medium of the second circulation loop is cooling water.
[0027] In a preferred embodiment, the heat exchange medium of the third circulation loop is a refrigerant.
[0028] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application filed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.
[0029] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. An integrated energy-saving composite cooling system for data centers, characterized in that, It includes a first refrigeration unit and a second refrigeration unit for cooling the cold energy receiving end of the object served by the cold source system; The first refrigeration unit outputs a natural cold source; The second refrigeration unit outputs a mechanical cold source; The first refrigeration unit includes a cooler, a first water pump, and a first heat exchanger; The second refrigeration unit includes a compressor, a second heat exchanger, an expansion valve, and a third heat exchanger; The cooling capacity receiving end is equipped with a second water pump; The liquid outlet on the hot side of the first heat exchanger is connected to the liquid inlet on the hot side of the third heat exchanger, the liquid outlet on the hot side of the third heat exchanger is connected to the liquid inlet of the second water pump, the liquid outlet of the second water pump is connected to the liquid inlet of the cold energy receiving end, and the liquid outlet of the cold energy receiving end is connected to the liquid inlet on the hot side of the first heat exchanger. The hot side of the first heat exchanger, the hot side of the third heat exchanger, the second water pump, and the cold energy receiving end form a first circulation loop; The cold-side outlet of the first heat exchanger is connected to the cold-side inlet of the second heat exchanger, the cold-side outlet of the second heat exchanger is connected to the inlet of the cooler, the outlet of the cooler is connected to the inlet of the first water pump, and the outlet of the first water pump is connected to the cold-side inlet of the first heat exchanger. The cold side of the first heat exchanger, the cold side of the second heat exchanger, the cooler, and the first water pump form a second circulation loop; The compressor's outlet is connected to the inlet of the hot side of the second heat exchanger, the liquid outlet of the hot side of the second heat exchanger is connected to the inlet of the expansion valve, the liquid outlet of the expansion valve is connected to the inlet of the cold side of the third heat exchanger, and the outlet of the cold side of the third heat exchanger is connected to the inlet of the compressor. The compressor, the hot side of the second heat exchanger, the expansion valve, and the cold side of the third heat exchanger form a third circulation loop.
2. The integrated energy-saving composite cooling system for data centers according to claim 1, characterized in that, The heat exchange medium in the second circulation loop is cooling water.
3. The integrated energy-saving composite cooling system for data centers according to claim 1, characterized in that, The heat exchange medium in the third circulation loop is a refrigerant.
4. The integrated energy-saving composite cooling system for data centers according to claim 1, characterized in that, The cooler is a dry cooler.