CN215991717U - Phase-change refrigerating system - Google Patents
Phase-change refrigerating system Download PDFInfo
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- CN215991717U CN215991717U CN202122067808.XU CN202122067808U CN215991717U CN 215991717 U CN215991717 U CN 215991717U CN 202122067808 U CN202122067808 U CN 202122067808U CN 215991717 U CN215991717 U CN 215991717U
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Abstract
The disclosure provides a phase change refrigeration system, relates to the field of refrigeration systems, and particularly relates to the field of refrigeration of data centers. The specific implementation scheme is as follows: the system comprises: the system comprises a phase change circulating device, a cooling tower which is intensively arranged on a roof and a tail end heat exchange device which is arranged indoors; the phase change circulating device is communicated with the cooling tower through a first pipeline, and the phase change circulating device is communicated with the tail end heat exchange device through a second pipeline; the cooling fluid in the cooling tower is transmitted to the phase change circulating device through the first pipeline, and the cooling fluid absorbs the heat of the gaseous refrigerant in the phase change circulating device to convert the gaseous refrigerant into the liquid refrigerant; the cooling fluid absorbs heat and then is conveyed to the cooling tower through the first pipeline for cooling again; and the liquid refrigerant is conveyed to the tail end heat exchange device through a second pipeline to refrigerate the indoor space. The phase change refrigeration system provided by the disclosure has the effect of improving the energy efficiency of the refrigeration system.
Description
Technical Field
The disclosure relates to the technical field of refrigeration systems, in particular to a phase-change refrigeration system in the field of data center refrigeration.
Background
A data center is a globally collaborative network of devices that is used to communicate, accelerate, present, compute, store data information over an internet network infrastructure. With the development of internet technology, the demand of data centers is increasing in recent years, and the equipment in the data centers generates a large amount of heat during operation, so that the data centers need to be cooled and radiated.
SUMMERY OF THE UTILITY MODEL
The present disclosure provides a phase change refrigeration system, comprising:
the system comprises a phase change circulating device, a cooling tower which is intensively arranged on a roof and a tail end heat exchange device which is arranged indoors;
the phase change circulating device is communicated with the cooling tower through a first pipeline, and the phase change circulating device is communicated with the tail end heat exchange device through a second pipeline;
the cooling fluid in the cooling tower is transmitted to the phase change circulating device through the first pipeline, and the cooling fluid absorbs the heat of the gaseous refrigerant in the phase change circulating device to convert the gaseous refrigerant into the liquid refrigerant;
the cooling fluid absorbs heat and then is conveyed to the cooling tower through the first pipeline for cooling again; and the liquid refrigerant is conveyed to the tail end heat exchange device through a second pipeline to refrigerate the indoor space.
The phase change refrigeration system provided by the disclosure can improve the energy efficiency of the refrigeration system.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The drawings are included to provide a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
FIG. 1 is a schematic diagram of a phase change refrigeration system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a phase change cycle device according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a heat exchanger according to an embodiment of the present disclosure;
FIG. 4 is a schematic illustration between a cooling tower and a heat exchanger according to an embodiment of the present disclosure;
FIG. 5 is a schematic illustration between a cooling tower and a heat exchanger according to another embodiment of the present disclosure;
FIG. 6 is a schematic view of an evaporator according to an embodiment of the present disclosure.
Reference numerals: 1. a phase change circulation device; 11. a heat exchanger; 111. a first inlet; 112. a first outlet; 113. a second inlet; 114. a second outlet; 12. an air pump; 13. a liquid pump; 14. a filter; 15. a liquid storage tank; 16. a valve; 2. a cooling tower; 21. a water pump; 22. a fluid pump; 3. a terminal heat exchange device; 31. an evaporator; 311. a heat exchange back plate; 312. a liquid supply coil pipe; 313. a flow valve; 314. a temperature sensor; 32. a compressor; 4. a first pipeline; 5. a second pipeline; 51. a liquid pipe section; 52. a gas pipe section.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of the embodiments of the disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The present disclosure provides a phase change refrigeration system that can be applied to numerous fields such as the medical and health field, the mechanical and electronic industry, food engineering, indoor cooling of buildings, and the like. Taking cooling of a data center in a building as an example, the data center generally refers to a physical space for implementing centralized processing, storage, transmission, exchange and management of information, and computer devices, server devices, network devices, storage devices and the like are generally regarded as key devices of a network core computer room. When these devices are in operation, the temperature in the physical space is continuously increased, and if the space is not cooled, the normal operation of the devices is affected.
In the prior art, a traditional chilled water system is adopted for cooling a data center, chilled water circulates through a water chiller to be refrigerated to produce chilled water, then a water pump provides power to supply the chilled water to a room precision air conditioner, and return air is cooled to refrigerate a machine room; the cooling water system sends the heat generated by the water chilling unit to the cooling tower through the water pump, and cools the cooling water through outdoor air to supply water and convey the heat to the atmosphere. When the system is used for high-rise buildings, as a large amount of cooling water needs to be conveyed to a high rise, the pressure required by high-rise water supply is high, and a water pump is required to provide sufficient power, the system has the defects of high energy consumption and poor energy saving performance, and does not meet the requirement of PUE (index for evaluating energy efficiency of a data center); in addition, the high-rise water delivery system also needs to be provided with corresponding engineering pipelines which are arranged on a high-rise building in a complex way, so that the existing chilled water system is not suitable for the high-rise building and also does not meet the energy-saving requirement.
In order to solve the above problem, an embodiment of the present disclosure provides a phase change refrigeration system, as shown in fig. 1, including:
phase change circulating device 1, cooling tower 2 and terminal heat transfer device 3.
For example, the refrigeration system cools a data center in a high-rise building, the terminal heat exchange devices 3 are arranged in the building, the phase change circulation devices 1 correspond to the terminal heat exchange devices 3 one to one, the phase change circulation devices 1 are arranged on the outer sides of the high-rise building, the cooling towers 2 are intensively arranged on the roof of the high-rise building, and one cooling tower 2 can be connected with a plurality of phase change cooling devices.
As shown in fig. 2, the phase change circulation device 1 is communicated with the cooling tower 2 through a first pipeline 4, and the phase change circulation device 1 is communicated with the terminal heat exchange device 3 through a second pipeline 5.
The cooling fluid in the cooling tower 2 is transferred to the phase change cycle device 1 through the first pipe 4, and the cooling fluid absorbs heat of the gaseous refrigerant in the phase change cycle device 1 to convert the gaseous refrigerant into the liquid refrigerant.
The cooling fluid absorbs heat and then is conveyed into the cooling tower 2 through the first pipeline 4 for cooling again; the liquid refrigerant is conveyed to the tail end heat exchange device 3 through the second pipeline 5 to refrigerate the indoor space.
The cooling system of the present disclosure is provided with the centralized cooling tower 2 on the roof, the phase change circulating device 1 and the terminal heat exchange device 3 utilize the scheme of the phase change refrigerant, and the liquid refrigerant needs to absorb a large amount of heat in the process of being converted into the gaseous refrigerant, so that the cooling system can realize the effect of cooling the indoor space. Because the phase-change refrigerant has strong cold carrying capacity, the refrigeration system is suitable for high-rise buildings, can improve the energy efficiency of the refrigeration system and meets the requirements of PUE. In addition, in the refrigeration process, the refrigerant is circularly converted between a liquid state and a gaseous state, so that the recycling of the refrigerant can be realized.
In one example, the first pipeline 4 and the second pipeline 5 may be metal pipelines such as steel pipes and copper pipes, or corrosion-resistant polymer pipelines such as teflon pipes. If adopt metal pipeline, metal pipeline inner wall sets up anticorrosive coating, avoids corrosive fluid to corrode the pipeline inner wall.
As shown in fig. 2, the phase change cycle apparatus 1 includes a heat exchanger 11, an air pump 12, and a liquid pump 13, in one example, the heat exchanger 11 is a shell-and-tube heat exchanger 11, a cold fluid flows inside a tube of the heat exchanger 11, a hot fluid flows inside a shell of the heat exchanger 11, and the cold fluid and the hot fluid exchange heat inside the heat exchanger 11. Fig. 3 shows a cross-sectional view of the heat exchanger 11, where the heat exchanger 11 includes a first inlet 111, a first outlet 112, a second inlet 113, and a second outlet 114, where the cooling fluid output from the cooling tower 2 enters the inside of the heat exchanger 11 through the first inlet 111, and the cooling fluid absorbs heat in the heat exchanger 11, and then is output through the first outlet 112 and enters the cooling tower 2. The liquid refrigerant in the heat exchanger 11 enters the terminal heat exchange device 3 through the second inlet 113, the liquid refrigerant is vaporized into a gaseous refrigerant after absorbing heat in the terminal heat exchange device 3, and the gaseous refrigerant is output through the second outlet 114 and then enters the heat exchanger 11 to be cooled again into the liquid refrigerant.
The air pump 12 and the liquid pump 13 are used for delivering refrigerant, and the refrigerant can be R134a, freon, hydrocarbon, ammonia, and other phase-change fluids, and the disclosure does not limit the type of the refrigerant. Because the refrigerant is corrosive, the refrigerant easily damages the air pump 12 and the liquid pump 13, so the air pump 12 and the liquid pump 13 are both fluorine pumps, and because the linings of the fluorine pumps are both fluoroplastics, the fluoroplastics have corrosion resistance, and therefore the fluorine pumps can be used for conveying various corrosive fluids.
As shown in fig. 2, the second pipeline 5 comprises a liquid pipe section 51 and a gas pipe section 52, wherein one end of the liquid pipe section 51 is communicated with the second outlet 114 of the heat exchanger 11, and the other end is communicated with the terminal heat exchange device 3. One end of the gas pipe section 52 communicates with the second inlet 113 of the heat exchanger 11, and the other end communicates with the terminal heat exchange device 3.
As shown in fig. 2, the air pump 12 is disposed in the air pipe section 52 of the second pipeline 5, and the air pump 12 is located between the heat exchanger 11 and the end heat exchange device 3, and the air pump 12 delivers the gaseous refrigerant in the end heat exchange device 3 to the heat exchanger 11 through the air pipe section 52 of the second pipeline 5. The liquid pump 13 is disposed in the liquid pipe section 51 of the second pipeline 5, the liquid pump 13 is located between the heat exchanger 11 and the end heat exchange device 3, and the liquid pump 13 delivers the liquid refrigerant in the heat exchanger 11 to the end heat exchange device 3 through the liquid pipe section 51 of the second pipeline 5. The liquid refrigerant is converted into a gaseous refrigerant after exchanging heat with the tail end heat exchange device 3, the gaseous refrigerant enters the heat exchanger 11 through the air pipe section 52 of the second pipeline 5, and the gaseous refrigerant is converted into liquid again after exchanging heat with heat exchange fluid in the heat exchanger 11, so that the phase change cycle process of the refrigerant is completed.
In one example, the cooling fluid in the cooling tower 2 is cooling water, the cooling tower 2 is centrally disposed on the roof of a high-rise building, in order to increase the heat exchange rate between the cooling water and air, the cooling tower 2 may be disposed in plurality on the roof of the high-rise building, and the cooling tower 2 may be an open cooling tower or a closed cooling tower, which is not limited by the present disclosure. As shown in fig. 4, the cooling tower 2 is communicated with the heat exchanger 11 through the first pipeline 4, the water pump 21 provides power for cooling water, the water pump 21 is disposed between the cooling tower 2 and the heat exchanger 11, after the water pump 21 is started, the cooling water flows out to the first pipeline 4 through the outlet of the cooling tower 2, and then enters the pipe of the heat exchanger 11 through the first inlet 111 of the heat exchanger 11 through transmission of the first pipeline 4, after the cooling water absorbs heat of the gaseous refrigerant in the heat exchanger 11, a small part of the cooling water is evaporated into water vapor, after the rest of the cooling water absorbs heat, the temperature is increased and converted into hot water, the water vapor and the hot water flow out through the first outlet 112 of the heat exchanger 11, and then enter the cooling tower 2 through the inlet of the first pipeline 4, and the water vapor and the hot water are cooled into the cooling water again after exchanging heat with outdoor air in the cooling tower 2. Since the cooling water in the cooling tower 2 is less evaporated, it is necessary to periodically replenish the cooling tower 2 with cooling water.
In one example, the cooling fluid in the cooling tower 2 may also be a phase change fluid, as shown in fig. 5, the cooling tower 2 is communicated with the heat exchanger 11 through the first pipeline 4, the fluid pump 22 provides power for the phase change fluid, and the fluid pump 22 is disposed between the cooling tower 2 and the heat exchanger 11. After the fluid pump 22 is started, the phase-change fluid flows out to the first pipeline 4 through the outlet of the cooling tower 2, and then enters the tube of the heat exchanger 11 through the first inlet 111 of the heat exchanger 11 after being transmitted by the first pipeline 4, and the phase-change fluid is converted from a liquid state to a gaseous state after absorbing the heat of the gaseous refrigerant in the heat exchanger 11. The gaseous phase-change fluid flows out through the first outlet 112 of the heat exchanger 11, and then enters the cooling tower 2 through the transmission of the first pipeline 4, and the gaseous phase-change fluid is converted into a liquid state again from a gaseous state after heat exchange in the cooling tower 2.
In an example, when the terminal heat exchange device 3 outputs the gaseous refrigerant, impurities such as dust in a room may be entrained in the gaseous refrigerant, and in order to prevent the impurities contained in the gaseous refrigerant from damaging the air pump 12 and affecting the operation of the air pump 12, as shown in fig. 2, a filter 14 is disposed at the air pipe section 52 of the second pipeline 5, the filter 14 is located between the air pump 12 and the terminal heat exchange device 3, after the gaseous refrigerant is filtered by the filter 14, the impurities such as dust are filtered by the filter 14, and the filtered gaseous refrigerant enters the air pump 12 and is delivered to the shell of the heat exchanger 11.
Because the gaseous refrigerant is converted into the liquid refrigerant after exchanging heat in the heat exchanger 11, after the liquid pump 13 is started, the liquid pump 13 conveys the liquid refrigerant to the heat exchange end, and if the liquid pump 13 is closed and other devices of the refrigeration system still normally operate, the liquid refrigerant in the heat exchanger 11 can be continuously output, so that the liquid refrigerant is accumulated in the second pipeline 5, and the phenomenon that the pressure in the second pipeline 5 is overlarge and the expansion or the liquid refrigerant flows back to the heat exchanger 11 occurs. As shown in fig. 2, a receiver 15 is provided at the liquid pipe section 51 of the second pipe 5, the receiver 15 is located between the heat exchanger 11 and the liquid pump 13, and the receiver 15 is provided to store excess liquid refrigerant.
In one example, as shown in fig. 2, the liquid pipe section 51 of the second pipeline 5 is provided with a valve 16, the valve 16 is positioned between the liquid pump 13 and the end heat exchanger 3, and the valve 16 is arranged for adjusting the flow rate of the liquid refrigerant.
In one example, as shown in fig. 2, the terminal heat exchange device 3 includes an evaporator 31 and a compressor 32, an input end of the compressor 32 is connected with the evaporator 31, and an output end of the compressor 32 is connected with the heat exchanger 11; the liquid refrigerant in the heat exchanger 11 is sent to the evaporator 31 through the second pipe 5, and the liquid refrigerant is vaporized into a gaseous refrigerant after absorbing heat in the evaporator 31. The gaseous refrigerant is sucked by the compressor 32 and then converted into a high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the heat exchanger 11 and is cooled again into a liquid refrigerant.
In one example, the evaporator 31 may be a wind wall or a back plate heat exchanger, the back plate heat exchanger may be a conventional copper-tube aluminum fin heat exchanger 11 or a micro-channel heat exchanger 11 in the field of vehicle air conditioners, and the specific form of the evaporator 31 is not limited by the present disclosure.
The evaporator 31 is described by taking a back plate heat exchanger as an example, as shown in fig. 6, the evaporator 31 includes a plurality of heat exchange back plates 311, and the arrangement of the plurality of heat exchange back plates 311 is beneficial to improving the evaporation effect of the liquid refrigerant. The liquid supply coil 312 is arranged on the heat exchange back plate 311, the liquid supply coil 312 is communicated with a liquid inlet of the heat exchange back plate 311, the liquid supply coil 312 is arranged spirally or in an arc shape, and the spiral or the arc shape can improve the surface area of the liquid supply coil 312, so that the liquid refrigerant absorbs more heat, and the indoor refrigeration effect is improved.
As shown in fig. 6, a flow valve 313 is disposed between the liquid inlet of heat exchange back plate 311 and liquid supply coil 312, flow valve 313 is used for adjusting the flow rate of liquid refrigerant, liquid refrigerant is powered by liquid pump 13 and is delivered to the liquid inlet of heat exchange back plate 311, then throttled by flow valve 313 and enters liquid supply coil 312, and then liquid refrigerant absorbs heat and is evaporated into gaseous refrigerant. The flow valve 313 adopts an electronic expansion valve which has the characteristic of quick adjustment response. In order to facilitate control of the electronic expansion valve, the evaporator 31 is further provided with a temperature sensor 314, the temperature sensor 314 is electrically connected with the electronic expansion valve, and the electronic expansion valve performs opening adjustment according to the temperature collected by the temperature sensor 314, so as to adjust the flow rate of the liquid refrigerant.
In one example, a wet bulb thermometer for measuring the outdoor wet bulb temperature is provided outdoors and fixed on the roof of a high-rise building, and when the outdoor wet bulb temperature is lower than the indoor supply air temperature, the compressor 32 is bypassed in this state, and the refrigeration system adopts a natural cooling mode. When the outdoor wet bulb temperature is higher than the indoor supply air temperature, the compressor 32 is turned on and the refrigeration system adopts a mechanical refrigeration mode. For example, the outdoor temperature in winter is low, the refrigeration system adopts a natural cooling mode, the outdoor temperature in summer is high, and the refrigeration system adopts a mechanical refrigeration mode.
In one example, the compressor 32 is an oil-free compressor, which refers to a compressor 32 that does not use lubricating oil in the cylinders of the compressor 32, and the discharge gas is free of oil gas because no lubricating oil is in contact with the compressed gas source during operation. The problem that the oil return problem of the compressor 32 affects the refrigeration of the phase-change refrigeration system can be avoided by adopting the oil-free compressor, so that the refrigeration effect of the phase-change refrigeration system is improved.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (9)
1. A phase change refrigeration system, the system comprising:
the system comprises a phase change circulating device, a cooling tower which is intensively arranged on a roof and a tail end heat exchange device which is arranged indoors;
the phase change circulating device is communicated with the cooling tower through a first pipeline, and the phase change circulating device is communicated with the tail end heat exchange device through a second pipeline;
the cooling fluid in the cooling tower is transmitted to the phase change circulating device through the first pipeline, and the cooling fluid absorbs the heat of the gaseous refrigerant in the phase change circulating device to convert the gaseous refrigerant into the liquid refrigerant;
the cooling fluid absorbs heat and then is conveyed to the cooling tower through the first pipeline for cooling again; and the liquid refrigerant is conveyed to the tail end heat exchange device through a second pipeline to refrigerate the indoor space.
2. The system of claim 1, wherein the phase change cycle device comprises: the heat exchanger, the air pump and the liquid pump;
the gas pump is arranged between the heat exchanger and the tail end heat exchange device, and the gas pump conveys the gaseous refrigerant in the tail end heat exchange device to the heat exchanger through the second pipeline;
the liquid pump is arranged between the heat exchanger and the tail end heat exchange device, and the liquid pump conveys the liquid refrigerant in the heat exchanger to the tail end heat exchange device through a second pipeline.
3. The system of claim 1 or 2, wherein a filter is disposed on the second pipeline for filtering impurities in the gaseous refrigerant, the filter being located between the air pump and the terminal heat exchange device.
4. The system of claim 3, wherein a valve is disposed on the second line for regulating the flow of the liquid refrigerant, the valve being located between the liquid pump and the terminal heat exchange device.
5. The system of claim 3, wherein a liquid reservoir is provided on the second conduit for storing the liquid refrigerant, the liquid reservoir being located between the heat exchanger and the liquid pump.
6. The system of claim 3, wherein the cooling fluid in the cooling tower is cooling water, the cooling tower powering the cooling water via a water pump;
and the water pump conveys the cooling water in the cooling tower to the heat exchanger through the first pipeline, and the cooling water absorbs the heat of the gaseous refrigerant and then is conveyed into the cooling tower through the first pipeline for cooling again.
7. The system of claim 3, wherein the cooling fluid in the cooling tower is a phase-change fluid, the cooling tower being powered by a fluid pump;
the fluid pump conveys the phase-change fluid in the cooling tower to the heat exchanger through the first pipeline, and the phase-change fluid is converted from a liquid state to a gaseous state after absorbing heat of gaseous refrigerant in the heat exchanger; the phase-change fluid after absorbing the heat is conveyed to the cooling tower through the first pipeline to be cooled again, and the phase-change fluid is converted into a liquid state from a gaseous state in the cooling tower.
8. The system of claim 6 or 7, wherein the terminal heat exchange device comprises: the heat exchanger comprises an evaporator and a compressor, wherein the input end of the compressor is connected with the evaporator, and the output end of the compressor is connected with the heat exchanger;
the liquid refrigerant is conveyed to the evaporator through the second pipeline, and after absorbing heat in the evaporator, the liquid refrigerant is vaporized into gaseous refrigerant;
and the gaseous refrigerant is treated by the compressor and then enters the heat exchanger to be cooled into a liquid refrigerant.
9. The system of claim 8, wherein a throttle valve is disposed within the evaporator for regulating the flow of the liquid refrigerant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122067808.XU CN215991717U (en) | 2021-08-30 | 2021-08-30 | Phase-change refrigerating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122067808.XU CN215991717U (en) | 2021-08-30 | 2021-08-30 | Phase-change refrigerating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115175521A (en) * | 2022-06-30 | 2022-10-11 | 阿里巴巴（中国）有限公司 | Dry cooler, control method of dry cooler, electronic device and storage medium |
| CN117320391A (en) * | 2023-09-26 | 2023-12-29 | 黑龙江大学 | Heat energy exchange system for data center and sewage plant |
-
2021
- 2021-08-30 CN CN202122067808.XU patent/CN215991717U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115175521A (en) * | 2022-06-30 | 2022-10-11 | 阿里巴巴（中国）有限公司 | Dry cooler, control method of dry cooler, electronic device and storage medium |
| CN117320391A (en) * | 2023-09-26 | 2023-12-29 | 黑龙江大学 | Heat energy exchange system for data center and sewage plant |
| CN117320391B (en) * | 2023-09-26 | 2024-05-28 | 黑龙江大学 | Heat energy exchange system for data center and sewage plant |
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