Vertical air cooling device for gradient utilization of energy

Abstract

The utility model relates to the technical field of heating, ventilation and air conditioning, and particularly provides a vertical air cooling device for gradient utilization of energy, which comprises a machine room air flowing passage, an outdoor air flowing passage, a waste heat recovery coil pipe, a heat exchanger and a cold water coil pipe, a waste heat recovery coil pipe, a heat exchanger and a cold water coil pipe are sequentially and vertically arranged on the machine room air flowing passage in series; the outdoor air flowing passages are distributed on the two sides of the heat exchanger; the heat exchanger comprises a plurality of air-air heat exchange pipes distributed in an array mode, and inner cavities of the air-air heat exchange pipes serve as a part of a machine room air flowing channel. Gaps among the outer walls of the air-air heat exchange pipes serve as a part of an outdoor air flowing channel. The air flow of the machine room is creatively designed to be vertically distributed, the air flow can be distributed in a precise air conditioner machine room of a traditional mechanical refrigeration system, the difficulty in layout, arrangement and operation of equipment such as a data machine room, a machine cabinet and a server is avoided, and the utilization rate of space and occupied space can be greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heating ventilation air conditioning, specifically relates to a vertical air cooling device of energy cascade utilization. BACKGROUND

[0002] At present, more and more data machine rooms adopt indirect evaporative cooling technology, and the PUE index of data center can be greatly improved, but the indirect evaporative cooling technology also has obvious disadvantages, one is that the indirect evaporative cooling system cancels the water loop of the traditional mechanical refrigeration system in the waste heat utilization, leading to the waste heat recovery, and the market lacks effective waste heat utilization technology corresponding to it, which is a technical blank, two is subject to the gravity flow of water spraying and other factors, the air flow in the indirect evaporative cooling unit is horizontally arranged, leading to the waste of space and land of the data center of indirect evaporative cooling technology, and there is a big size difference between different brands of indirect evaporative cooling units, and the early design leads to a lot of rework, affecting the construction progress. CONTENT OF UTILITY MODEL

[0003] In view of the problems existing in the above-mentioned existing construction technology, the utility model provides a vertical air cooling device of energy cascade utilization, which innovatively designs the air flow in the machine room as vertical arrangement, can be arranged in the precision air conditioning machine room of the traditional mechanical refrigeration system, avoids the difficulties in layout, arrangement and operation of the data machine room, cabinet and server equipment, and can greatly improve the utilization rate of space and land.

[0004] The utility model provides a vertical air cooling device of energy cascade utilization, which comprises a machine room air flow channel, an outdoor air flow channel, a waste heat recovery coil, a heat exchanger and a cold water coil, the waste heat recovery coil, the heat exchanger and the cold water coil are vertically and sequentially arranged in sequence on the machine room air flow channel, the outdoor air flow channel is distributed on both sides of the heat exchanger, the heat exchanger comprises a plurality of arrayed air-air heat exchange pipes, the inner cavity of the air-air heat exchange pipe is used as part of the machine room air flow channel, and the gap between the outer walls of the plurality of air-air heat exchange pipes is used as part of the outdoor air flow channel.

[0005] Further, the heat exchanger further comprises a water sprayer, and the water sprayer sprays the outer wall of the air-air heat exchange pipe.

[0006] Further, the heat exchanger further comprises a water pipe, a water collecting groove and a circulating water pump, a plurality of arrayed air-air heat exchange pipes are vertically arranged above the water collecting groove, one end of the water pipe is communicated with the water collecting groove, the other end is communicated with the water sprayer, and the circulating water pump is arranged on the water pipe.

[0007] Furthermore, the heat exchanger also includes a heat exchange baffle; multiple arrayed empty heat exchange tubes are vertically arranged below the heat exchange baffle, and the empty heat exchange tubes penetrate the heat exchange baffle; the water sprayer is located between the heat exchange baffle and the water receiving tank.

[0008] Furthermore, the two ends of the hollow heat exchange tube pass through the heat exchange partition and the water receiving tank, respectively.

[0009] Furthermore, the water sprayers are distributed in the gaps between the outer walls of the plurality of hollow heat exchange tubes.

[0010] Furthermore, a fan is also installed in the airflow path of the computer room.

[0011] Furthermore, an outdoor air fan is also installed on the outdoor air flow path.

[0012] Furthermore, the airflow path in the computer room includes an air inlet and an air outlet; the waste heat recovery coil is located near the air inlet, and the chilled water coil is located near the air outlet.

[0013] Furthermore, the outdoor air flow path includes outdoor air inlets and outdoor air outlets distributed on opposite sides of the heat exchanger.

[0014] The beneficial effects of this utility model are:

[0015] 1) It overcomes the shortcomings of indirect evaporative cooling technology in data centers, which lacks a water loop and cannot recover waste heat. While maintaining the original hours of natural cooling, it can also utilize waste heat recovery coils to recover a large amount of waste heat from the data center air, producing hot water for various purposes, demonstrating high energy-saving potential. 2) The innovative vertical airflow design allows it to be integrated into precision air-conditioned data centers using traditional mechanical refrigeration systems. This avoids difficulties in layout, arrangement, and operation of data center equipment such as racks and servers, significantly improving space and footprint utilization. 3) It requires minimal modification to the air-conditioned data center, has no impact on the data center or rack areas, and has very low investment costs. It can significantly improve the energy efficiency of data centers and has high promotional value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the vertical air-cooling device for energy cascade utilization according to this utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of a medium heat exchanger;

[0018] Figure 3 for Figure 2Structural schematic diagram of another perspective of the heat exchanger.

[0019] In the figure: 1- machine room fan; 2- outdoor air fan; 3- waste heat recovery coil; 4- heat exchanger; 4.1- air-air heat exchange pipe; 4.2- water sprayer; 4.3- water collecting tank; 4.4- heat exchange partition; 4.5- circulating water pump; 5- cold water coil; 6- hot water pipe interface; 7- cold water pipe interface. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below in combination with the drawings and specific embodiments:

[0021] As Figures 1-3 shown in the vertical air-cooled device capable of energy cascade utilization, comprising a machine room air flow passage, an outdoor air flow passage, a waste heat recovery coil 3, a heat exchanger 4 and a cold water coil 5.

[0022] In the machine room air flow passage, the machine room air inlet is connected with one end of the waste heat recovery coil 3, the other end of the waste heat recovery coil 3 is connected with one end of the heat exchanger 4, the other end of the heat exchanger 4 is connected with one end of the cold water coil 5, and the other end of the cold water coil 5 is connected with the machine room air outlet, thereby forming a circulating pipeline, and the machine room fan 1 can be placed in any node of the circulating pipeline.

[0023] In the outdoor air flow passage, the outdoor air inlet is connected with one side of the heat exchanger 4, and the other side of the heat exchanger 4 is connected with the outdoor air outlet, thereby forming a circulating pipeline, and the outdoor air fan 2 can be placed in any node of the circulating pipeline.

[0024] The waste heat recovery coil 3 and the cold water coil 5 are air-water heat exchange coils, and are provided with two water pipe interfaces for connecting with external devices. The waste heat recovery coil 3 is provided with a hot water pipe interface 6, and the cold water coil 5 is provided with a cold water pipe interface 7.

[0025] As Figure 2 and Figure 3 shown, the heat exchanger 4 is horizontally placed, the upper ends of the arrayed multiple air-air heat exchange pipes 4.1 are connected with the heat exchange partition 4.4, and the lower ends of the air-air heat exchange pipes 4.1 are connected with the bottom plate of the water collecting tank 4.3, wherein the upper ends and the lower ends of the air-air heat exchange pipes 4.1 respectively penetrate the heat exchange partition 4.4 and the water collecting tank 4.3, so as to facilitate the flow of the machine room air. The machine room air flow passage is located in the inner cavity of the air-air heat exchange pipe 4.1, and the outdoor air flow passage is located outside the pipe wall of the air-air heat exchange pipe 4.1, the two air flows are not mixed, and only heat exchange occurs on the pipe wall of the air-air heat exchange pipe 4.1.

[0026] In the process, the air in the computer room enters through the passageway. The air in the computer room flows through the waste heat recovery coil 3, passes through the air-to-air heat exchange tube 4.1, is cooled, and then is sent to the chilled water coil 5.

[0027] In the outdoor air flow passage, the water sprayer 4.2 is connected to the circulating water pump 4.5 via a water pipe. The circulating water pump 4.5 is connected to the water receiving tank 4.3 via a water pipe, forming a water spray circulation system. Outdoor air enters this outdoor air flow passage and comes into direct contact with the water in the water spray circulation system. After isenthalpic cooling, it flows through the outer wall of the air-to-air heat exchange tube 4.1, absorbs heat, and is finally discharged into the atmosphere through the outdoor air outlet.

[0028] The working principle of the vertical air-cooling device in this embodiment is as follows:

[0029] When the waste heat recovery coil 3 and the chilled water coil 5 are connected to different heat source systems, such as Figure 1 As shown, with the airflow provided by the server room fan 1, hot air in the data center server room enters from the server room air inlet, flows through the waste heat recovery coil 3, and undergoes heat exchange. The waste heat recovery coil 3 recovers the high-temperature heat in the server room hot air. Subsequently, the server room hot air enters the heat exchanger 4, where a second heat exchange occurs. The heat exchanger 4 recovers the medium-temperature heat in the server room hot air. Further, the server room hot air is sent to the chilled water coil 5, where a third heat exchange occurs. The chilled water coil 5 recovers the low-temperature heat in the server room hot air. The server room air is significantly cooled and then sent back to the data center, thus forming a cycle.

[0030] The hot water, which absorbs heat from the air in the machine room, is transported to an external heat pump heat recovery unit by the waste heat recovery coil 3. In the heat exchanger 4, outdoor air comes into direct contact with the water in the water spray circulation system, and after isenthalpic cooling, flows through… Figure 2 and Figure 3 The outer wall of the air-to-air heat exchange tube 4.1 absorbs the heat from the air in the machine room and finally discharges it into the atmosphere through the outdoor air outlet; the chilled water coil 5 is then transported to the external chiller unit after absorbing the heat from the air in the machine room.

[0031] When the waste heat recovery coil 3 and the chilled water coil 5 share the same heat source system, the waste heat recovery coil 3 and the chilled water coil 5 are turned on alternately according to the outdoor air temperature and humidity thresholds. For example... Figure 1As shown, above the threshold, such as summer, the waste heat recovery coil 3 does not work, the cold water coil 5 works, under the air flow power provided by the machine room fan 1, the hot air in the data center machine room enters from the machine room air inlet, flows through the waste heat recovery coil 3, does not react, then the machine room hot air enters the heat exchanger 4, the first heat exchange occurs, the heat exchanger 4 recovers the high-temperature heat in the machine room hot air, further, the machine room hot air is sent to the cold water coil 5, the second heat exchange occurs, the cold water coil 5 recovers the low-temperature heat in the machine room hot air, the machine room air is significantly cooled, and is sent back to the data center machine room to form a cycle. Below the threshold, such as winter, the waste heat recovery coil 3 works, the cold water coil 5 does not work, under the air flow power provided by the machine room fan 1, the hot air in the data center machine room enters from the machine room air inlet, flows through the waste heat recovery coil 3, the first heat exchange occurs, the waste heat recovery coil 3 recovers the high-temperature heat in the machine room hot air, then the machine room hot air enters the heat exchanger 4, the second heat exchange occurs, the heat exchanger 4 recovers the high-temperature heat in the machine room hot air, the machine room air is significantly cooled, finally, the machine room hot air passes through the cold water coil 5 and is sent back to the data center machine room, wherein the cold water coil 5 does not exchange heat with the hot air, to form a cycle.

[0032] Similarly, the hot water absorbing the heat in the above machine room air is transported to the external heat pump heat recovery unit by the waste heat recovery coil 3 or the cold water coil 5; the outdoor air in the heat exchanger 4 directly contacts the water in the water spray circulation system, after isothermal cooling, flows through the outer wall of the air-to-air heat exchange pipe 4.1 in the heat exchanger 4, absorbs the heat in the above machine room air, and finally is discharged to the atmosphere through the outdoor air outlet. Figure 2 and Figure 3 Similarly, the hot water absorbing the heat in the above machine room air is transported to the external heat pump heat recovery unit by the waste heat recovery coil 3 or the cold water coil 5; the outdoor air in the heat exchanger 4 directly contacts the water in the water spray circulation system, after isothermal cooling, flows through the outer wall of the air-to-air heat exchange pipe 4.1 in the heat exchanger 4, absorbs the heat in the above machine room air, and finally is discharged to the atmosphere through the outdoor air outlet.

[0033] In summary, the vertical air cooling device capable of energy cascade utilization in the embodiment has great research and improvement in key nodes such as waste heat utilization, energy cascade utilization, and space occupation, has high energy-saving potential, especially for data centers in northern regions, and more importantly, innovatively designs the machine room air flow as vertical arrangement, which can greatly improve the utilization rate of space and land of the data center, especially for land shortage areas such as first-tier and second-tier cities.

[0034] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not limited to the above-mentioned embodiments, any technical scheme falling within the concept of the utility model belongs to the protection scope of the utility model. It should be noted that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principles of the utility model are also regarded as the protection scope of the utility model.

Claims

1. A vertical air-cooled device for cascaded energy utilization, characterized in that, It includes an airflow path through the computer room, an outdoor airflow path, a waste heat recovery coil, a heat exchanger, and a chilled water coil; the waste heat recovery coil, the heat exchanger, and the chilled water coil are arranged vertically in series along the airflow path through the computer room; the outdoor airflow path is distributed on both sides of the heat exchanger; the heat exchanger includes multiple arrayed empty heat exchange tubes, and the inner cavity of the empty heat exchange tubes serves as part of the airflow path through the computer room; The gaps between the outer walls of the multiple hollow heat exchange tubes serve as part of the passageway through which the outdoor air flows.

2. The vertical air-cooled device for energy cascade utilization according to claim 1, characterized in that, The heat exchanger also includes a water sprayer; the water sprayer sprays the outer wall of the air-to-air heat exchange tube.

3. The vertical air-cooled device for energy cascade utilization according to claim 2, characterized in that, The heat exchanger also includes water pipes, a water receiving tank, and a circulating water pump; multiple arrays of the air-cooled heat exchange tubes are vertically arranged above the water receiving tank, one end of the water pipe is connected to the water receiving tank, and the other end is connected to the water sprayer, and the circulating water pump is arranged on the water pipe.

4. The vertical air-cooled device for energy cascade utilization according to claim 3, characterized in that, The heat exchanger also includes a heat exchange baffle; multiple arrays of hollow heat exchange tubes are vertically arranged below the heat exchange baffle, and the hollow heat exchange tubes penetrate the heat exchange baffle; the water sprayer is located between the heat exchange baffle and the water receiving tank.

5. The vertical air-cooled device for energy cascade utilization according to claim 4, characterized in that, The two ends of the hollow heat exchange tube pass through the heat exchange partition and the water receiving tank, respectively.

6. The vertical air-cooled device for energy cascade utilization according to claim 4, characterized in that, The water sprayers are distributed in the gaps between the outer walls of the multiple hollow heat exchange tubes.

7. The vertical air-cooled device for energy cascade utilization according to claim 1, characterized in that, The airflow path in the computer room is also equipped with a computer room fan.

8. The vertical air-cooled device for energy cascade utilization according to claim 1, characterized in that, An outdoor air fan is also installed in the outdoor air flow path.

9. The vertical air-cooled device for energy cascade utilization according to claim 1, characterized in that, The airflow path in the computer room includes an air inlet and an air outlet; the waste heat recovery coil is located near the air inlet, and the chilled water coil is located near the air outlet.

10. The vertical air-cooled device for energy cascade utilization according to claim 1, characterized in that, The outdoor air flow path includes an outdoor air inlet and an outdoor air outlet distributed on opposite sides of the heat exchanger.

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