Phase change auxiliary evaporative cooling air conditioning system for data center

Abstract

The utility model discloses a phase change auxiliary evaporative cooling air conditioning system applied to a data center, which comprises a cooling channel, and an air inlet filter screen, a spraying device, a phase change energy storage system, an air supply system and an air outlet filter screen are sequentially arranged in the cooling channel from an air inlet to an air outlet. The phase change energy storage system comprises phase change plates arranged side by side in the direction from an air inlet to an air outlet of the cooling channel, the space between every two adjacent phase change plates is filled with a phase change material, introduced air sequentially passes through the spraying device and the phase change energy storage system, and the air subjected to two times of temperature and humidity treatment meets the air supply requirement of the data center machine room. And the air is fed into the machine room for cooling through the axial flow fan. The system has the advantages that the data center can be continuously cooled, the system has the advantages of being safe, reliable, low in operation energy consumption and high in refrigeration efficiency, the operation time can be adjusted according to the actual situation, periodic intermittent operation is adopted, different phase change materials and spraying liquid can be used according to different requirements, and flexibility is high.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature reduction and cooling devices, and in particular to a phase change auxiliary evaporative cooling air conditioning system for a data center. Background Art

[0002] At present, natural air cooling, liquid cooling, latent heat storage and other technologies have been proposed for data center cooling systems at home and abroad. Among them, natural air cooling is a technology that does not rely on mechanical equipment or electricity. It uses natural airflow, heat convection and radiation to discharge heat or introduce cold air to achieve the purpose of cooling through reasonable design of building structure or system. However, only a few areas in China have meteorological conditions that meet the requirements of direct natural air cooling technology for most of the year; liquid cooling is a technology that uses fluid (usually water or specific coolant) as a cooling medium to replace traditional air conditioning to absorb and transfer heat. It has high cooling efficiency and low energy consumption, but there are safety hazards. There is a risk of liquid leakage, which affects the safety and stability of equipment in the computer room; latent heat storage technology is a technology that uses the latent heat released or absorbed by a substance during a phase change process to store and release energy. Today, this technology has been applied to emergency refrigeration and waste heat recovery and treatment systems in data centers, but it is less used in sustainable cooling of data center computer rooms. With the introduction of energy conservation, emission reduction, carbon peak and carbon neutrality concepts, these technologies are all committed to the construction of green and low-carbon data centers, but there is still room for improvement in terms of safety, economy and efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a safe, reliable, low-energy-consuming phase-change assisted evaporative cooling air-conditioning system for a data center.

[0004] The technical solution is as follows: A phase-change assisted evaporative cooling air conditioning system for a data center, the main point of which is that it includes a cooling channel, in which an air inlet filter, a spray device, a phase-change energy storage system, an air supply system and an air outlet filter are arranged in sequence from the air inlet to the air outlet in the cooling channel, and the phase-change energy storage system includes phase-change plates arranged side by side along the direction from the air inlet to the air outlet of the cooling channel, and phase-change materials are filled between adjacent phase-change plates. With the above structure, outdoor fresh air enters the cooling channel through the air inlet filter, and the evaporative cooling of the spray device achieves the effect of cooling and humidifying, and then the phase-change energy storage system achieves the effect of cooling and dehumidifying. The air after two temperature and humidity treatments is sent to the data room, which can cool the data rack.

[0005] Preferably, the spray device comprises a top spray pipe and a side wall spray pipe respectively arranged on the top and side wall of the cooling channel, the top spray pipe and the side wall spray pipe are connected to each other, and a water spray port is provided on the top spray pipe. With the above structure, cooling water is transported to the water spray port of the top spray pipe through the side wall spray pipe, and the cooling water is sprayed downward from the water spray port, and then directly and fully contacts with the introduced air, so as to achieve the effect of cooling and humidifying.

[0006] As a preference: a residual water recovery hole is provided at the bottom of the cooling channel below the spray device, and the residual water recovery hole is arranged corresponding to the water spray port. With the above structure, the residual water recovery hole provided at the bottom of the cooling channel can collect the cooling water after spraying for secondary recycling, thus saving water resources.

[0007] Preferably, the air inlet filter and the air outlet filter are respectively close to the air inlet and the air outlet of the cooling channel. With the above structure, some impurities in the air can be filtered out to prevent them from affecting the cooling effect of the phase change assisted evaporative cooling air conditioning system, and at the same time, prevent impurities from entering the computer room of the data center and affecting the operation or heat dissipation of the equipment in the computer room.

[0008] As a preferred embodiment: the outermost phase change plate and the side wall of the cooling channel are filled with phase change material, and multiple phase change plates are vertically, evenly, and equidistantly arranged in the cooling channel. With the above structure, the phase change material filled in the phase change plate contacts the air to exchange latent heat, thereby achieving the effect of cooling and dehumidifying. Multiple phase change plates are arranged vertically in the cooling channel, which is conducive to completing the latent heat exchange more quickly and completely, thereby achieving cooling and dehumidifying.

[0009] As a preferred embodiment: the air supply system supports and several axial flow fans installed on the supports. With the above structure, the axial flow fans can provide energy for the air that has been treated with temperature and humidity twice, and transport the air into the data center room to achieve cooling of the data center room.

[0010] Compared with the prior art, the utility model has the following beneficial effects: for sustainable cooling of data centers, the system is safe and reliable, has low operating energy consumption, and has high refrigeration efficiency. The operating time can also be adjusted according to actual conditions, and periodic intermittent operation can be adopted. Different phase change materials and spray liquids can be used according to different requirements, and the system has high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 A top view of a phase change assisted evaporative cooling air conditioning system;

[0013] Figure 3A new type of flow chart is used for this purpose. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with embodiments and drawings.

[0015] like Figure 1 and Figure 2 As shown, a phase change assisted evaporative cooling air conditioning system applied to a data center mainly comprises a cooling channel 1, in which an air inlet filter 5, a spray device 2, a phase change energy storage system, an air supply system and an air outlet filter 6 are sequentially arranged from the air inlet to the air outlet in the cooling channel 1, the phase change energy storage system comprises phase change plates 3 arranged side by side along the air inlet to the air outlet direction of the cooling channel 1, and phase change materials are filled between adjacent phase change plates 3, and the air after evaporative cooling by the spray device 2 and treatment by the phase change energy storage section will become air that can meet the air supply requirements of the data center computer room, and the outdoor fresh air sequentially passes through the spray device 2 of the evaporative cooling section and the phase change plate 3 of the energy storage section to sequentially achieve the effects of cooling and humidifying and cooling and dehumidifying, and the air after two temperature and humidity treatments meets the air supply requirements of the data center computer room, and the air that meets the requirements is sent into the data room, so that the data room can be cooled to avoid the computer room from being unable to operate due to overheating, causing unnecessary losses.

[0016] The spray device 2 includes a top spray pipe 201 and a side wall spray pipe 202 respectively arranged on the top and side wall of the cooling channel 1, the top spray pipe 201 and the side wall spray pipe 202 are connected to each other, a water spray port 203 is opened on the top spray pipe 201, the number of the water spray ports 203 is 3, and they are equidistantly arranged on the top spray pipe 201, and a residual water recovery hole 204 is opened at the bottom of the cooling channel 1 below the spray device 2, and the positions and numbers of the water spray ports 203 and the residual water recovery holes 204 correspond to each other, the water spray port 203 is arranged at the top, and the cooling water sprayed from top to bottom can fully contact the fresh air introduced into the cooling channel 1 as much as possible, so as to achieve the purpose of cooling and humidifying, and the residual water recovery hole 204 is arranged corresponding to the water spray port 203, and the residual water after spraying is collected through the residual water recovery hole 204 at the bottom of the device, and is re-transported back to the spray pipe through a water pump for secondary recycling.

[0017] Phase change material is filled between the outermost phase change plate 3 and the side wall of the cooling channel 1. Multiple phase change plates 3 are vertically, evenly and equidistantly arranged in the cooling channel 1. At night, the phase change plate 2 directly introduces outdoor cold air, and the phase change material is naturally cooled, stores cold energy, and presents a solid state. During the day, when working, outdoor hot air is introduced to exchange heat and moisture with water and phase change material. At this time, the phase change material releases the cold energy stored at night, absorbs heat in the air, and presents a liquid state. This not only saves energy consumption, but also enables the air-conditioning system to operate for a long time, and can ensure that sufficient cold air is delivered to the data center computer room for cooling during the day or at night.

[0018] Data center rooms in different situations can be adaptively adjusted according to specific circumstances. The air supply volume and the number of water nozzles 203, phase change panels 3 or the internal phase change material of the phase change panel 3 can be controlled according to wind speed, ambient temperature and the size of the cooling channel 1 to meet the data center's demand for cold air and achieve safe and efficient cooling and heat dissipation.

[0019] The air inlet filter 5 and the air outlet filter 6 are respectively close to the air inlet and the air outlet of the cooling channel 1, and can filter out certain impurities in the air to prevent them from affecting the cooling effect of the phase change assisted evaporative cooling air-conditioning system, while preventing impurities from entering the computer room of the data center and affecting the operation or heat dissipation of the equipment in the computer room.

[0020] The air supply system support and the plurality of axial fans 4 mounted on the support provide power for the processed air, which is transported through the data center room for cooling to avoid overheating.

[0021] like Figure 3As shown, the air conditioning system provides a method of combining direct evaporative cooling and phase change energy storage technology under natural wind cooling to adjust the temperature and humidity of outdoor fresh air. The system makes full use of natural cold sources. First, the outdoor fresh air that has undergone primary treatment such as filtration and purification is guided to flow into the spray device 2 through the air inlet filter 5 and directly contact with water. The spray device 2 is a direct evaporative cooler. The method of generating cold air by direct evaporative cooling is used. The saturated air layer on the outer layer of the water molecules evaporates or condenses due to the vapor pressure difference between the water molecules and the surrounding air, thereby realizing heat and moisture exchange between the air and the water. The air that achieves the effect of cooling and humidifying then flows through the phase change plate 3 and contacts with the inside of the plate. The phase change material is indirectly in contact with the air, and latent heat exchange occurs. The solid phase change material absorbs heat from the air and liquefies, and the air temperature decreases. Since the air is in direct contact with the metal shell of the phase change plate, some water vapor remains on the metal shell, achieving the purpose of dehumidifying the air. Finally, the air after two temperature and humidity treatments is sent to the computer room under the guidance of the axial flow fan 4, and the temperature of the computer room is controlled. The hot air in the computer room will dissipate from the top, and the cooling water sprayed by the spray device 2 is recovered through the residual water recovery hole 204, and then re-delivered to the spray device 2 by the water pump for secondary use, which can effectively save resources and avoid waste.

[0022] In the phase change assisted evaporative cooling air conditioning system used in the data center, the spray device 2 plays a dominant role in the cooling effect of the air; the phase change plate 3 plays a dominant role in the humidity control of the air, and the two work together to meet the air supply requirements of the data center, thereby delivering air into the computer room to achieve safe and efficient cooling; in addition, in view of the meteorological characteristics of various regions in my country, the device has great potential for application in most regions of the country.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A phase change assisted evaporative cooling air conditioning system for a data center, comprising a cooling channel (1), characterized in that: An air inlet filter (5), a spray device (2), a phase change energy storage system, an air supply system and an air outlet filter (6) are arranged in sequence from the air inlet to the air outlet in the cooling channel (1); the phase change energy storage system comprises phase change plates (3) arranged side by side along the direction from the air inlet to the air outlet of the cooling channel (1); phase change material is filled between adjacent phase change plates (3).

2. The phase change assisted evaporative cooling air conditioning system for a data center according to claim 1, characterized in that: The spray device (2) comprises a top spray pipe (201) and a side wall spray pipe (202) respectively arranged on the top and side wall of the cooling channel (1); the top spray pipe (201) and the side wall spray pipe (202) are interconnected, and a water spray port (203) is provided on the top spray pipe (201).

3. The phase change assisted evaporative cooling air conditioning system for a data center according to claim 2, characterized in that: A residual water recovery hole (204) is provided at the bottom of the cooling channel (1) below the spray device (2), and the residual water recovery hole (204) is arranged corresponding to the water spray port (203).

4. The phase change assisted evaporative cooling air conditioning system for a data center according to claim 1, 2 or 3, characterized in that: The air inlet filter (5) and the air outlet filter (6) are respectively close to the air inlet and the air outlet of the cooling channel (1).

5. The phase change assisted evaporative cooling air conditioning system for a data center according to claim 1, 2 or 3, characterized in that: Phase change material is filled between the outermost phase change plate (3) and the side wall of the cooling channel (1), and a plurality of phase change plates (3) are arranged vertically, evenly and equidistantly in the cooling channel (1).

6. The phase change assisted evaporative cooling air conditioning system for a data center according to claim 1, 2 or 3, characterized in that: The air supply system supports and a plurality of axial flow fans (4) mounted on the supports.

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