A distributed high-efficiency targeted refrigeration system for a data center

Abstract

The present invention relates to a distributed high-efficiency targeted refrigeration system for a data center, comprising: a micro-module cabinet and a targeted cooling air-conditioning unit. The micro-module cabinet includes an even number of server cabinets arranged oppositely, the tops of the oppositely arranged server cabinets are connected and sealed by an upper cover plate, a sealed door is arranged between the server cabinets on the edge in the micro-module cabinet, and a cooling space is formed among the sealed door, the upper cover plate and the server cabinets. The server cabinet includes a backplane, a server mounting rack and a panel, and a hot channel is arranged between the backplane and the server mounting rack; the targeted cooling air-conditioning unit is arranged in the raised floor under each server cabinet, the return air outlet of the targeted cooling air-conditioning unit is connected to the hot channel, and the air outlet is connected to the cooling space. The present invention can solve the problem of high energy consumption of the traditional data center air-conditioning system, and enables the PUE value to be less than 1.3.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning systems, and in particular to a distributed, efficient, targeted refrigeration system for a data center. Background Art

[0002] With the increasing density of IT equipment in electronic information system rooms, addressing the increasing heat dissipation of both equipment and rooms has garnered significant attention. Research indicates that IT / telecom-related carbon emissions have become one of the largest sources of greenhouse gas emissions, generating 860 million tons annually. These emissions continue to rise rapidly as global demand for computing, data storage, and communications technologies grows.

[0003] The PUE (Power Usage Effectiveness) value has become an internationally accepted metric for measuring data center power efficiency. The PUE value is the ratio of all energy consumed by a data center to the energy consumed by the IT load. The closer the PUE value is to 1, the more green a data center is. Currently, advanced data center rooms abroad typically have PUE values between 1.8 and 2, while most data centers in my country have PUE values between 2 and 3. Therefore, reducing the PUE value is an urgent issue that needs to be addressed. Summary of the Invention

[0004] The present invention provides a distributed and efficient targeted refrigeration system for data centers, which can solve the problem of high energy consumption of traditional data center air-conditioning systems and make the PUE value less than 1.3.

[0005] The technical solution adopted by the present invention to solve its technical problems is: to provide a distributed and efficient targeted cooling system for a data center, comprising: a micro-module cabinet and a targeted cooling air-conditioning unit, the micro-module cabinet comprising an even number of relatively arranged server cabinets, the tops of the relatively arranged server cabinets being connected and sealed by an upper cover plate, a sealed door being arranged between the server cabinets on the side of the micro-module cabinet, a cooling space being formed between the sealed door, the upper cover plate and the server cabinet, the server cabinet comprising a back plate, a server mounting rack and a panel, a heat channel being arranged between the back plate and the server mounting rack; the targeted cooling air-conditioning unit being arranged in an elevated floor under each server cabinet, the return air outlet of the targeted cooling air-conditioning unit being connected to the heat channel, and the air outlet being connected to the cooling space; the heat generated by the servers on the server mounting rack is guided to the cooling air-conditioning unit via the heat channel, and the cooling air generated after cooling by the cooling air-conditioning unit enters the cooling space through the air outlet.

[0006] The back panel of the server cabinet is a heat-insulating panel, and the front panel is a ventilation grid panel.

[0007] A flow guide plate is provided between the backplane and the server mounting rack inside the server cabinet. The bottom of the flow guide plate is connected to the bottom of the server cabinet, and a set distance is left between the top of the flow guide plate and the top of the server cabinet. The channel formed among the flow guide plate, the server mounting rack, and the backplane serves as the hot channel. The heat generated by the servers on the server mounting rack first moves upward under the action of the flow guide plate, and then moves downward to the air outlet under the action of the fan in the cooling air-conditioning unit.

[0008] An exhaust fan is provided at the top of the server cabinet above the hot channel.

[0009] The targeted cooling air-conditioning unit includes a first placement space and a second placement space. The first placement space is located in the raised floor at the bottom of the server cabinet, and an air return opening is provided at the position where the first placement space is connected to the hot channel. The second placement space is located in the raised floor under the cooling space, and an air outlet is provided at the position where the second placement space is connected to the cooling space. A cooler is provided in the first placement space, and a fan is provided in the second placement space.

[0010] The cross-section of the heat exchange tube used in the cooler is elliptical, and the long axis direction of the ellipse is the same as the air flow direction.

[0011] An air flow transition channel is provided between two adjacent targeted cooling air-conditioning units.

[0012] The cooler is connected to an external integrated chiller station. The integrated chiller station includes a magnetic levitation chiller and a closed cooling tower. The closed cooling tower is connected to the magnetic levitation chiller. The closed cooling tower is used to provide cooling water for the magnetic levitation chiller, and the magnetic levitation chiller is used to generate chilled water at 20 - 22 °C and deliver the 20 - 22 °C chilled water to the cooler.

[0013] The cooler is connected to an external air-cooled condenser, and the air-cooled condenser uses cold air for cooling.

[0014] The cooler is connected to an external shallow geothermal fresh air system. The shallow geothermal fresh air system includes a shallow geothermal heat exchanger buried underground. The shallow geothermal heat exchanger is connected to the ground through a fresh air pipe and to the computer room where the micro-module cabinet is placed through a supply air pipe. The shallow geothermal heat exchanger is also connected to the cooler.

[0015] Beneficial effects

[0016] Due to the adoption of the above technical solution, compared with the prior art, the present invention has the following advantages and positive effects: In the distributed high-efficiency targeted cooling system of the data center of the present invention, a targeted cooling air conditioner is arranged in the raised floor corresponding to the bottom of each cabinet. The targeted cooling air conditioner is used to eliminate the heat generated by the servers in the cabinet and at the same time perform targeted cooling on the cabinet. Since the cooling distance is short, the cooling efficiency is high. Placing all the targeted cooling air conditioners in the raised floor can effectively save the floor area of the data center and make reasonable use of the space in the data center. The distributed high-efficiency targeted cooling system of the data center of the present invention adopts an integrated chiller station and a shallow geothermal fresh air system to provide cold sources for each targeted cooling air conditioner, which can make full use of the natural cold source outdoors and ultimately achieve the goals of energy conservation, low carbon, green and environmental protection. In the present invention, the targeted cooling air conditioner adopts a flat tube low wind resistance cooler, and its wind resistance is reduced by 30% compared with the ordinary round tube cooler, and the cooling effect is improved by 10%. The cabinets in the present invention adopt airtight three-channel cabinets, so that the heat generated by the servers circulates inside the cabinets, realizing efficient cooling of the servers in the cabinets, thereby achieving the goal of energy conservation and ensuring that the PUE value of the data center is less than 1.3. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the principle of the flat tube low wind resistance cooler in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0020] An embodiment of the present invention relates to a distributed high-efficiency targeted cooling system for a data center, as Figure 1As shown in the figure, it includes a micro-module cabinet 1 and a targeted cooling air-conditioning unit 2. The micro-module cabinet 1 includes an even number of oppositely arranged server cabinets 11 (for example, 5 server cabinets are arranged on one side, and 5 server cabinets are oppositely arranged on the other side, so there are a total of 10 server cabinets). The tops of the oppositely arranged server cabinets 11 are connected and sealed by an upper cover plate 12. A sealed door is arranged between the server cabinets 11 on the edge of the micro-module cabinet 1. A cooling space 13 is formed among the sealed door, the upper cover plate 12 and the server cabinets 11. The server cabinet 11 includes a backplane 111, a server mounting rack 112 and a panel 113. A hot channel is arranged between the backplane 111 and the server mounting rack 112. In this embodiment, the backplane 111 of the server cabinet 11 is a heat-insulating board, and the panel 113 is a ventilation grid board. In this way, the heat generated by the servers installed on the server mounting rack 112 can be prevented from being dissipated to the outside through the backplane, and the cold air in the cooling space can cool the servers through the ventilation grid board, ensuring that the servers can work at the most suitable temperature.

[0021] A flow guide plate 114 is arranged between the backplane 111 and the server mounting rack 112 in the server cabinet 11. The bottom of the flow guide plate 114 is connected to the bottom of the server cabinet 11, and a set distance is left between the top of the flow guide plate 114 and the top of the server cabinet 11. The channel formed among the flow guide plate 114, the server mounting rack 112 and the backplane 111 serves as the hot channel. The hot channel is divided into an ascending channel and a descending channel by the flow guide plate 114. The heat generated by the servers can be converged by using the ascending channel, and then all the converged heat is sent into the targeted cooling air-conditioning unit through the descending channel, so that efficient cooling can be carried out. The heat generated by the servers on the server mounting rack first moves upward under the action of the flow guide plate 114, and then moves downward to the air outlet under the action of the fan in the cooling air-conditioning unit. A exhaust fan 115 is arranged at the top of the server cabinet 11 above the hot channel. The exhaust fan 115 is forcibly started when the targeted cooling air-conditioning unit fails, and the heat generated by the servers is discharged through the exhaust fan, thus forming a temporary heat dissipation channel. It can be seen that the micro-module cabinet 1 adopted in this embodiment is a sealed three-channel cabinet, which can make the heat generated by the servers circulate inside the cabinet, realize efficient cooling of the servers in the cabinet, and thus achieve the purpose of energy saving.

[0022] In this embodiment, the targeted cooling air-conditioning unit 2 is arranged in the raised floor under each server cabinet 11. The return air outlet of the targeted cooling air-conditioning unit 2 is connected to the hot aisle, and the air outlet is connected to the cooling space. The heat generated by the servers on the server mounting rack 112 is guided to the cooling air-conditioning unit 2 through the hot aisle. The cooled air generated after being cooled by the cooling air-conditioning unit 2 enters the cooling space through the air outlet. The targeted cooling air-conditioning unit 2 includes a first placement space 21 and a second placement space 22. The first placement space 21 is located in the raised floor under the bottom of the server cabinet 11. At the position where the first placement space 21 is connected to the hot aisle, there is provided the return air outlet 23. An air inlet equalizing plate can be arranged at the position of the return air outlet so that the air volume entering the return air outlet can be evenly distributed. The second placement space 22 is located in the raised floor under the cooling space. At the position where the second placement space 22 is connected to the cooling space, there is provided the air outlet 24. A cooler 25 is arranged in the first placement space 21. The cooler 25 is connected to an external refrigeration system through two pipes for heat exchange. A fan 26 is arranged in the second placement space 22. On the one hand, the fan fills heat into the return air outlet 23, and on the other hand, blows the air cooled by the cooler out from the air outlet 24 to cool the servers. In this embodiment, one targeted cooling air-conditioning is arranged in the raised floor corresponding to the bottom of each cabinet. The targeted cooling air-conditioning is used to eliminate the heat generated by the servers in the cabinet and at the same time conduct targeted cooling on the cabinet. Since the cooling distance is short, the cooling efficiency is high. Placing all the targeted cooling air-conditionings in the raised floor can effectively save the floor area of the data center and rationally utilize the space in the data center, so as to achieve the maximum layout of cabinets.

[0023] In this embodiment, the cross-section of the heat exchange tube A used in the cooler is elliptical, the ratio of its major axis to minor axis is 2:1, and the major axis direction is the same as the air flow direction, as Figure 2 shown. Since the two sides of the elliptical flat tube are thinner than the middle, it has a lower wind resistance during the heat transfer process. Therefore, compared with an ordinary round tube cooler, the wind resistance of the flat tube cooler is reduced by 30%, and the cooling effect can be improved by 10%.

[0024] In this embodiment, the external refrigeration system can be an integrated refrigeration station, an air-cooled condenser, or a shallow geothermal fresh air system.

[0025] When the external refrigeration system is an integrated refrigeration station, the integrated refrigeration station includes a magnetic levitation chiller 3 and a closed cooling tower 4, and the closed cooling tower 4 is connected to the magnetic levitation chiller 3; the closed cooling tower 4 is used to provide cooling water for the magnetic levitation chiller 3, and the magnetic levitation chiller 3 is used to generate chilled water at 20 - 22°C and transport the 20 - 22°C chilled water to the cooler. The magnetic levitation chiller in this embodiment adopts a high-temperature water design, with a COP of over 12, and significant energy savings. The use of an integrated refrigeration station allows for factory prefabrication and fast on-site installation. When cooling in summer, the chiller and the cooling tower are turned on to produce high-temperature chilled water, and the chilled water outlet temperature is 20 - 22°C. Compared with the conventional chiller with a chilled water outlet of 7°C, this embodiment has better energy-saving effects. The magnetic levitation chiller in this embodiment uses high-temperature chilled water at 20 - 22°C to enter the targeted cooling air-conditioning unit, and the return air temperature is controlled at 26 - 28°C. Since the cooler adopts a flat tube design, it can ensure that the supply air temperature after cooling is between 23 - 25°C to meet the server cooling requirements. The temperature difference of the water in this heat exchange process is 6 - 8°C, and the flow rate decreases, which can save the power consumption of the water pump.

[0026] When the external refrigeration system is an air-cooled condenser 5, the air-cooled condenser 5 uses cold air for cooling. This air-cooled condenser usually needs to be used in conjunction with an integrated refrigeration station. When cooling in winter or the transitional season, the integrated refrigeration station can be turned off and switched to the air-cooled condenser, which directly uses cold air for cooling. In this way, the plate heat exchanger of the traditional system can be reduced, and the problem of temperature loss of about 2°C through the plate heat exchanger can be avoided.

[0027] When the external refrigeration system is a shallow geothermal fresh air system, the shallow geothermal fresh air system includes a shallow geothermal heat exchanger 6 buried underground. The shallow geothermal heat exchanger 6 is connected to the ground through a fresh air pipe 7 and to the computer room where the micro-module cabinet is placed through a supply air pipe 8; the shallow geothermal heat exchanger 6 is also connected to the cooler. The fresh air exchanges heat through the shallow geothermal energy. The fresh air enters the shallow geothermal heat exchanger from the ground and exchanges heat with the soil heat. Without mechanical cooling conditions, the temperature difference can reach 8 - 12°C. When the outdoor fresh air temperature is relatively high under extreme conditions, mechanical refrigeration can be carried out, and the cooled air is sent into the computer room by the fan power box. In this embodiment, the shallow geothermal heat exchanger needs to be buried 1.5 - 3 meters underground, with a diameter of 300 - 500 mm, having small air resistance and significant energy savings.

[0028] Key equipment such as the chiller, cooling tower, and water pump in this embodiment adopts a backup design. When a component or system fails, the standby equipment can be started, and the normal operation of the cabinet can still be ensured. The targeted cooling air conditioner unit adopts a dual-fan design or a dual-unit setup with an air flow transition channel. When one targeted cooling air conditioner unit fails, the cold air from the other targeted cooling air conditioner unit can supply cooling to the server cabinet corresponding to the faulty air conditioner unit through the air flow transition channel, that is, the other targeted cooling air conditioner unit supplies two server cabinets. The air volume is increased through frequency conversion to try to meet the heat dissipation as much as possible, waiting for the fault to be resolved and restoring the original operation mode.

[0029] After the above design, the PUE value of the data center adopting this embodiment can be ensured to be less than 1.3. It can be seen that the present invention can effectively solve the problem of high energy consumption of the traditional data center air conditioning system.

Claims

1. A distributed high-efficiency targeted refrigeration system for a data center, characterized in that, It includes: a micro-module cabinet and a targeted cooling air-conditioning unit. The micro-module cabinet includes an even number of oppositely arranged server cabinets. The tops of the oppositely arranged server cabinets are connected and sealed by an upper cover plate. A sealing door is arranged between the server cabinets on the edge of the micro-module cabinet. A cooling space is formed among the sealing door, the upper cover plate and the server cabinets. The server cabinet includes a back plate, a server mounting rack and a front panel. A hot channel is arranged between the back plate and the server mounting rack. The targeted cooling air-conditioning unit is arranged in the raised floor under each server cabinet. The return air outlet of the targeted cooling air-conditioning unit is connected to the hot channel, and the air outlet is connected to the cooling space. The heat generated by the servers on the server mounting rack is guided to the cooling air-conditioning unit through the hot channel. The cooling air generated after being cooled by the cooling air-conditioning unit enters the cooling space through the air outlet. A flow guide plate is arranged between the back plate and the server mounting rack in the server cabinet. The bottom of the flow guide plate is connected to the bottom of the server cabinet, and a set distance is left between the top of the flow guide plate and the top of the server cabinet. The channel formed among the flow guide plate, the server mounting rack and the back plate serves as the hot channel. The heat generated by the servers on the server mounting rack first moves upward under the action of the flow guide plate, and then moves downward to the air outlet under the action of the fan in the cooling air-conditioning unit.

2. The distributed high-efficiency targeted refrigeration system for a data center according to claim 1, wherein The back plate of the server cabinet is a heat-insulating plate, and the front panel is a ventilation grid plate.

3. The distributed high-efficiency targeted refrigeration system for a data center according to claim 1, characterized in that, An exhaust fan is arranged at the top of the server cabinet above the hot channel.

4. The distributed high-efficiency targeted refrigeration system for a data center according to claim 1, wherein, The targeted cooling air-conditioning unit includes a first placement space and a second placement space. The first placement space is located in the raised floor under the server cabinet, and the return air outlet is arranged at the position where the first placement space is connected to the hot channel. The second placement space is located in the raised floor under the cooling space, and the air outlet is arranged at the position where the second placement space is connected to the cooling space. A cooler is arranged in the first placement space, and a fan is arranged in the second placement space.

5. The distributed high-efficiency targeted refrigeration system for a data center according to claim 4, wherein The cross-section of the heat exchange tube adopted by the cooler is oval, and the long axis direction of the oval is the same as the air flow direction.

6. The distributed high-efficiency targeted refrigeration system for a data center according to claim 4, wherein An air flow transition channel is arranged between two adjacent targeted cooling air-conditioning units.

7. The distributed high-efficiency targeted refrigeration system for a data center according to claim 4, wherein The cooler is connected to an external integrated refrigeration station. The integrated refrigeration station includes a magnetic levitation chiller and a closed cooling tower. The closed cooling tower is connected to the magnetic levitation chiller. The closed cooling tower is used to provide cooling water for the magnetic levitation chiller. The magnetic levitation chiller is used to generate chilled water at 20-22°C and transport the 20-22°C chilled water to the cooler.

8. The distributed high-efficiency targeted refrigeration system for a data center according to claim 4, characterized in that The cooler is connected to an external air-cooled condenser, and the air-cooled condenser uses cold air for cooling.

9. The distributed high-efficiency targeted refrigeration system for a data center according to claim 4, wherein, The cooler is connected to an external shallow geothermal fresh air system. The shallow geothermal fresh air system includes a shallow geothermal heat exchanger buried underground. The shallow geothermal heat exchanger is connected to the ground through a fresh air pipe and to the computer room where the micro-module cabinet is placed through a supply air pipe. The shallow geothermal heat exchanger is also connected to the cooler.

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