CN116887581A - Immersed liquid cooling cabinet cooling system and control method - Google Patents
Immersed liquid cooling cabinet cooling system and control method Download PDFInfo
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- CN116887581A CN116887581A CN202310985801.7A CN202310985801A CN116887581A CN 116887581 A CN116887581 A CN 116887581A CN 202310985801 A CN202310985801 A CN 202310985801A CN 116887581 A CN116887581 A CN 116887581A
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- 239000007788 liquid Substances 0.000 title claims abstract description 317
- 238000001816 cooling Methods 0.000 title claims abstract description 304
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000011084 recovery Methods 0.000 claims abstract description 127
- 239000003507 refrigerant Substances 0.000 claims abstract description 70
- 239000002918 waste heat Substances 0.000 claims abstract description 65
- 238000005057 refrigeration Methods 0.000 claims abstract description 44
- 238000009825 accumulation Methods 0.000 claims description 50
- 230000001276 controlling effect Effects 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 15
- 230000017525 heat dissipation Effects 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 9
- 238000007654 immersion Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000012080 ambient air Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 13
- 230000001932 seasonal effect Effects 0.000 abstract description 5
- 239000000110 cooling liquid Substances 0.000 description 37
- 238000003860 storage Methods 0.000 description 21
- 239000000498 cooling water Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 10
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004334 fluoridation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20836—Thermal management, e.g. server temperature control
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention provides an immersed liquid cooling cabinet cooling system and a control method, wherein the cooling system comprises: the liquid cooling circulation comprises a liquid cooling tail end, a first liquid pump, a first intermediate heat exchanger and a second intermediate heat exchanger, and is provided with a first cold carrying working medium; the compressor refrigeration cycle comprises a compressor, a throttling element and a condensing heat exchanger which are connected through pipelines, wherein the refrigerant in the compressor forms heat exchange with the first refrigeration working medium in the second intermediate heat exchanger; the waste heat recovery cycle has the second cold-carrying working medium capable of forming heat exchange with the first cold-carrying working medium in the first intermediate heat exchanger, and the second cold-carrying working medium capable of forming heat exchange with the refrigerant in the condensing heat exchanger. According to the invention, at least one of the two cold sources can be controlled to cool the liquid cooling circulation according to the temperature of the second cold-carrying working medium, so that the natural cold source is utilized to a great extent, and the energy consumption of the high-temperature seasonal unit is reduced; waste heat utilization is realized, meaningless dissipation of energy is avoided, and heat pollution to the environment is reduced.
Description
Technical Field
The invention belongs to the technical field of cabinet cooling, and particularly relates to an immersed liquid cooling cabinet cooling system and a control method.
Background
Along with the increase of data processing capacity and data transmission speed of a data center, the heat dissipation requirement of the data center is further improved, and the traditional air cooling mode is adopted to cool components such as a server and the like, so that a fan with higher rotating speed and larger diameter and a heat dissipation channel with larger volume are required to meet the requirement, and the noise in a corresponding space is increased, the environmental heat influence is aggravated, and the construction cost and the running cost are increased. In order to meet the development requirement of the data center, the submerged liquid cooling technology is developed to become the most ideal refrigeration scheme of the data center.
The existing immersion liquid cooling technology is mainly divided into direct cooling and indirect cooling, wherein the indirect cooling is mainly cold plate type liquid cooling, and the direct cooling comprises single-phase immersion liquid cooling, two-phase immersion liquid cooling and single-phase spray type liquid cooling. The single-phase immersed liquid cooling is to directly immerse the server in the electronic fluoridation liquid to enable each electronic component on the server to exchange heat, and the electronic fluoridation liquid absorbs heat from the electronic fluoridation liquid and then releases heat through an external circulation cold source, so that the whole cooling circulation of the server is realized.
The inventor finds that the immersed liquid cooling cabinet cooling system in the related art mostly adopts a single external circulation cold source, such as one of cooling water circulation of a cooling tower or refrigerant circulation of a compressor, and the single external circulation cold source is difficult to have higher energy efficiency when the external environment is in a high-temperature or low-temperature working condition, so that the total annual energy consumption of the unit cooling system is higher, the energy efficiency is lower, in addition, heat absorbed by circulating cooling in the related art cannot be recycled, which causes meaningless energy dissipation, and the current liquid cooling cabinet cooling system can cause thermal pollution to the environment to a certain extent.
Disclosure of Invention
Therefore, the invention provides an immersed liquid cooling cabinet cooling system and a control method, which can solve the technical problems that in the prior art, the cabinet cooling system adopts a single external circulation cold source and cannot have higher energy efficiency, the unit cooling system has higher total energy consumption and lower energy efficiency all the year round, and meanwhile, the cooling system cannot effectively recycle the heat of equipment to be cooled (such as a server of a data center and the like), so that the energy is meaningless to dissipate, and certain thermal pollution is caused to the environment.
In order to solve the above problems, the present invention provides an immersed liquid cooling cabinet cooling system, comprising:
The liquid cooling circulation comprises a liquid cooling tail end, a first liquid pump, a first intermediate heat exchanger and a second intermediate heat exchanger which are connected through pipelines, wherein the first liquid pump is used for driving a first cold carrying working medium to circulate in the liquid cooling circulation, and a device to be cooled is immersed in the first cold carrying working medium in the liquid cooling tail end;
the compressor refrigeration cycle comprises a compressor, a throttling element and a condensing heat exchanger which are connected through pipelines, wherein the refrigerant in an exhaust pipeline of the compressor forms heat exchange with the first cold-carrying working medium in the second intermediate heat exchanger;
the waste heat recovery cycle comprises a second liquid pump and recovery heat utilization equipment, and is used for driving a second cold-carrying working medium to circulate in the waste heat recovery cycle, wherein the second cold-carrying working medium can form heat exchange with the first cold-carrying working medium in the first intermediate heat exchanger, and the second cold-carrying working medium can also form heat exchange with the refrigerant in the condensation heat exchanger.
In some embodiments of the present invention, in some embodiments,
the liquid cooling cycle further comprises a first flow path control valve bank connected to the first side of the first intermediate heat exchanger and a second flow path control valve bank connected to the first side of the second intermediate heat exchanger, the compressor refrigeration cycle further comprises a third flow path control valve bank connected to the second side of the condensing heat exchanger, the waste heat recovery cycle further comprises a fourth flow path control valve bank connected to the second side of the first intermediate heat exchanger, and the first flow path control valve bank, the second flow path control valve bank, the third flow path control valve bank and the fourth flow path control valve bank can adjust heat exchange generating positions among the first cold carrying working medium, the second cold carrying working medium and the refrigerant.
In some embodiments of the present invention, in some embodiments,
the first pipeline is connected to a first cold-carrying working medium inlet on the first side of the first intermediate heat exchanger, the second pipeline is connected to a first cold-carrying working medium outlet on the first side of the first intermediate heat exchanger, and the first flow control valve group comprises a first electromagnetic valve connected in series to the first pipeline and a second electromagnetic valve connected in series to the second pipeline; the third pipeline is connected to the first cold-carrying working medium inlet of the first side of the second intermediate heat exchanger, the fourth pipeline is connected to the first cold-carrying working medium outlet of the first side of the second intermediate heat exchanger, the second pipeline control valve group comprises a third electromagnetic valve connected in series to the third pipeline and a fourth electromagnetic valve connected in series to the fourth pipeline, one ends of the first pipeline and the second pipeline, far away from the first intermediate heat exchanger, and one ends of the third pipeline and the fourth pipeline, far away from the second intermediate heat exchanger, are connected in parallel to the fifth pipeline, the first pipeline control valve group further comprises a fifth electromagnetic valve connected in series to the fifth pipeline and located between the first pipeline and the second pipeline, and the second pipeline control valve group further comprises a sixth electromagnetic valve connected in series to the fifth pipeline and located between the third pipeline and the fourth pipeline.
In some embodiments of the present invention, in some embodiments,
the third flow path control valve group comprises a seventh electromagnetic valve connected in series with the sixth pipeline and an eighth electromagnetic valve connected in series with the seventh pipeline; the eighth pipeline is connected to the second cold-carrying working medium inlet of the second side of the first intermediate heat exchanger, the ninth pipeline is connected to the second cold-carrying working medium outlet of the second side of the first intermediate heat exchanger, and the fourth flow path control valve group comprises a ninth electromagnetic valve connected in series to the eighth pipeline and a tenth electromagnetic valve connected in series to the ninth pipeline; the third flow path control valve group further comprises an eleventh electromagnetic valve connected in series with the tenth pipeline and positioned between the sixth pipeline and the seventh pipeline, and the fourth flow path control valve group further comprises a twelfth electromagnetic valve connected in series with the tenth pipeline and positioned between the eighth pipeline and the ninth pipeline.
In some embodiments of the present invention, in some embodiments,
the waste heat recovery cycle further comprises a heat recovery liquid conveying pipe and a heat recovery liquid return pipe, wherein an outlet of the heat recovery liquid conveying pipe is communicated with one end, far away from the first intermediate heat exchanger, of the eighth pipeline, a thirteenth electromagnetic valve is connected in series to the heat recovery liquid conveying pipe, one end, far away from the condensation heat exchanger, of the seventh pipeline is communicated with the heat recovery liquid return pipe, and a fourteenth electromagnetic valve is connected in series to the heat recovery liquid return pipe; and/or the heat recovery liquid return pipe is connected with a first liquid treatment device in series, and/or a second liquid treatment device is connected with a pipeline between the first liquid pump and the first pipeline in series.
In some embodiments, further comprising:
the cooling tower liquid conveying pipeline and the cooling tower liquid return pipeline are connected in series, one end of the cooling tower liquid conveying pipeline is communicated with the cooling tower, the other end of the cooling tower liquid conveying pipeline is communicated with one end of the eighth pipeline, which is far away from the first intermediate heat exchanger, through a nineteenth electromagnetic valve, one end of the cooling tower liquid return pipeline is communicated with the cooling tower, the other end of the cooling tower liquid return pipeline is communicated with one end of the heat recovery liquid return pipeline, which is far away from the condensing heat exchanger, through a twentieth electromagnetic valve, the twentieth electromagnetic valve is connected in parallel with the fourteenth electromagnetic valve, a twenty first electromagnetic valve and the twenty first electromagnetic valve are connected in series on the flow pipeline between the second liquid pump and the twelfth electromagnetic valve, and the cold carrying working medium of the cooling tower internal circulation is the second cold carrying working medium.
In some embodiments of the present invention, in some embodiments,
a fifteenth electromagnetic valve is connected in series with one of a liquid inlet pipe and a liquid outlet pipe at the tail end of the liquid cooling, and a flow regulating valve is connected in series with the other one of the liquid inlet pipe and the liquid outlet pipe; and/or the liquid cooling tail ends are provided with a plurality of liquid cooling tail ends which are connected in parallel in the liquid cooling circulation.
In some embodiments of the present invention, in some embodiments,
the liquid cooling circulation further comprises a cold accumulation device, the cold accumulation device is connected with the liquid inlet pipe at the tail end of the liquid cooling through a fifth flow path control valve group, and the fifth flow path control valve group can control the first cold-carrying working medium in the liquid inlet pipe to flow through or not flow through the cold accumulation device.
In some embodiments of the present invention, in some embodiments,
the fifth flow path control valve group comprises a sixteenth electromagnetic valve connected in series with the inlet pipe of the cold accumulation device, a seventeenth electromagnetic valve connected in series with the outlet pipe of the cold accumulation device and an eighteenth electromagnetic valve connected in series with the liquid inlet pipe and positioned between the inlet pipe and the outlet pipe.
The invention also provides a control method of the immersed liquid cooling cabinet cooling system, which is characterized by comprising the following steps:
acquiring a system operation instruction;
when the system operation instruction is a heat recovery instruction, acquiring the real-time temperature Tr of a second cold-carrying working medium in a heat recovery liquid conveying pipe of the waste heat recovery cycle;
And controlling and adjusting the heat exchange generating positions of the first cold-carrying working medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle and the second cold-carrying working medium in the waste heat recovery cycle according to the temperature interval where the Tr is located.
In some embodiments, according to the temperature interval in which the Tr is located, controlling and adjusting the heat exchange occurrence positions of the first cold-carrying medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle, and the second cold-carrying medium in the waste heat recovery cycle includes:
when Tr is smaller than Tr1, controlling the first cold carrying working medium and the second cold carrying working medium to exchange heat at the first intermediate heat exchanger; or alternatively, the process may be performed,
when Tr1 is less than or equal to Tr2, controlling the first cold-carrying working medium to exchange heat with the second cold-carrying working medium at the first intermediate heat exchanger, controlling the first cold-carrying working medium to exchange heat with the refrigerant at the second intermediate heat exchanger, and controlling the second cold-carrying working medium after heat exchange with the first cold-carrying working medium to exchange heat with the refrigerant again at the condensing heat exchanger; or alternatively, the process may be performed,
when Tr2 is less than or equal to Tr3, controlling the heat exchange of the first cold-carrying working medium and the refrigerant at the second intermediate heat exchanger, and controlling the heat exchange of the second cold-carrying working medium and the refrigerant at the condensing heat exchanger;
The first water inlet preset temperature Tr1 is smaller than the second water inlet preset temperature Tr2 and smaller than the third water inlet preset temperature Tr3.
In some embodiments, when the submerged liquid-cooled cabinet cooling system includes a cooling tower feed line, a cooling tower return line,
when Tr is more than or equal to Tr3, the liquid conveying pipeline of the cooling tower is controlled to be communicated with the heat recovery liquid conveying pipe, the liquid return pipeline of the cooling tower is controlled to be communicated with the heat recovery liquid return pipe, and the heat exchange generating position of the first cold carrying working medium in the liquid cooling circulation, the refrigerant in the compressor refrigeration circulation and the second cold carrying working medium in the waste heat recovery circulation is controlled and adjusted according to the temperature interval of the real-time temperature Tr after the liquid conveying pipeline of the cooling tower and the heat recovery liquid conveying pipe are communicated and mixed.
In some embodiments of the present invention, in some embodiments,
when the system operation instruction is a unit conventional operation instruction, acquiring an outdoor environment temperature Tout;
and controlling and adjusting the heat exchange generating positions of the first cold-carrying working medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle and the second cold-carrying working medium in the cooling tower according to the temperature interval where the Tout is positioned.
In some embodiments, controlling and adjusting the heat exchange occurrence positions of the first cold-carrying medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle, and the second cold-carrying medium in the cooling tower according to the temperature interval in which the Tout is located includes:
When Tout > T3, controlling the heat exchange between the first cold carrier medium and the refrigerant at the second intermediate heat exchanger 52, and controlling the heat exchange between the second cold carrier medium and the refrigerant at the condensing heat exchanger 51; or alternatively, the process may be performed,
when T3 is more than or equal to Tout > T2, controlling the first cold-carrying working medium to exchange heat with the second cold-carrying working medium at the first intermediate heat exchanger, controlling the first cold-carrying working medium to exchange heat with the refrigerant at the second intermediate heat exchanger, and controlling the second cold-carrying working medium after heat exchange with the first cold-carrying working medium to exchange heat with the refrigerant again at the condensing heat exchanger; or alternatively, the process may be performed,
when T2 is more than or equal to Tout > T1, controlling the first cold carrying working medium and the second cold carrying working medium to exchange heat at the first intermediate heat exchanger; or alternatively, the process may be performed,
when T1 is more than or equal to Tout, controlling the heat exchange between the first cold-carrying working medium and the refrigerant at the second intermediate heat exchanger, and controlling the heat exchange between the refrigerant and the external environment air at the condensing heat exchanger;
the first preset ring temperature T1 is less than the second preset ring temperature T2 and less than the third preset ring temperature T3.
In some embodiments, when a cold storage device is included, the control method further includes:
Judging whether the power grid reaches a valley period or a peak period;
when the power grid reaches the valley period, controlling a first cold-carrying working medium in a liquid inlet pipe to enter the cold accumulation device for cold accumulation, and cutting off the first cold-carrying working medium after cold accumulation is finished and entering the cold accumulation device; or alternatively, the process may be performed,
when the cold accumulation of the cold accumulation device is finished and the power grid reaches the peak time, a first cold-carrying working medium in the liquid inlet pipe is controlled to enter the cold accumulation device so that the cold accumulation device releases cold to the first cold-carrying working medium, and the first cold-carrying working medium is cut off to enter the cold accumulation device after the cold release is finished.
The cooling system and the control method for the immersed liquid cooling cabinet provided by the invention have the following beneficial effects:
the system is provided with two cold sources of a compressor refrigeration cycle and a waste heat recovery cycle, so that at least one of the two cold sources can be controlled to cool the liquid cooling cycle according to the temperature of a second cold-carrying working medium in the waste heat recovery cycle, the natural cold source can be utilized to a greater extent, the energy consumption of a high-temperature seasonal unit is reduced, the utilization rate of the natural cold source in a transitional season is improved, the annual energy efficiency of the refrigerating unit (cooling system) can be improved, and the annual total energy consumption of the refrigerating unit is reduced; meanwhile, heat in the liquid cooling circulation is transferred to the recovery heat utilization equipment through the second cold-carrying working medium in the waste heat recovery circulation, so that waste heat utilization is realized, meaningless dissipation of energy sources is avoided, and heat pollution to the environment is reduced;
The on-off of the fifth flow path control valve group can be controlled to enable the first cold-carrying working medium to flow through or not flow through the cold accumulation device, so that the cold accumulation device can be started in the low-valley period of the power grid and can release the cold accumulation amount in the peak period of the power grid, the effects of saving energy, reducing consumption and staggering peak power consumption are achieved, and the operation and maintenance cost of the data center is reduced to a certain extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a schematic diagram of an immersion liquid cooled cabinet cooling system according to an embodiment of the invention, wherein arrows show the flow direction of liquid in the associated piping;
FIG. 2 is a schematic diagram illustrating the operation of the submerged liquid-cooled cabinet cooling system in a natural cooling mode for heat recovery;
FIG. 3 is a schematic diagram of the operation of the submerged liquid-cooled cabinet cooling system in a conventional cooling mode for heat recovery;
FIG. 4 is a schematic diagram illustrating the operation of the submerged liquid-cooled cabinet cooling system in the high-temperature cooling mode for heat recovery according to the present invention;
FIG. 5 is a schematic diagram illustrating the operation of the hybrid cold source natural cooling mode of the cooling system of the submerged liquid-cooled cabinet of the present invention;
FIG. 6 is a schematic diagram of a hybrid cold source conventional refrigeration mode operation of the submerged cabinet cooling system of the present invention;
FIG. 7 is a schematic diagram illustrating the operation of the hybrid cold source high temperature refrigeration mode of the cooling system of the submerged liquid cooling cabinet of the present invention;
FIG. 8 is a schematic diagram of the high temperature refrigeration mode operation of the submerged cabinet cooling system of the present invention;
FIG. 9 is a schematic diagram of a conventional refrigeration mode operation of an immersed liquid-cooled cabinet cooling system according to the present invention;
FIG. 10 is a schematic diagram of the natural cooling mode operation of the submerged liquid cooled cabinet cooling system of the present invention;
FIG. 11 is a schematic diagram illustrating the operation of the submerged cabinet cooling system in a cryogenic refrigeration mode according to the present invention;
FIG. 12 is a schematic diagram of a system operation control method of an immersion liquid cooled cabinet cooling system according to another embodiment of the invention.
The reference numerals are expressed as:
1. liquid cooling the tail end;
21. a first liquid pump; 22. a second liquid pump;
31. a second liquid treatment device; 32. a first liquid treatment device;
4. a first intermediate heat exchanger;
51. a condensing heat exchanger; 52. a second intermediate heat exchanger;
6. a throttle element;
7. a compressor;
8. a cold storage device;
9. a flow regulating valve;
101. a fifteenth solenoid valve; 102. a fifth electromagnetic valve; 103. a second electromagnetic valve; 104. a first electromagnetic valve; 105. a ninth electromagnetic valve; 106. a tenth electromagnetic valve; 107. a twenty-first solenoid valve; 108. a twelfth electromagnetic valve; 109. nineteenth solenoid valve; 110. a thirteenth electromagnetic valve; 111. a fourteenth electromagnetic valve; 112. a twentieth solenoid valve; 113. an eleventh electromagnetic valve; 114. a seventh electromagnetic valve; 115. an eighth electromagnetic valve; 116. a fourth electromagnetic valve; 117. a third electromagnetic valve; 118. a sixth electromagnetic valve; 119. a sixteenth electromagnetic valve; 120. an eighteenth electromagnetic valve; 121. seventeenth electromagnetic valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
Referring to fig. 1 and 12 in combination, according to an embodiment of the present invention, there is provided an immersion liquid cooling cabinet cooling system, specifically referring to fig. 1, the cooling system includes:
the liquid cooling circulation comprises a liquid cooling tail end 1, a first liquid pump 21, a first intermediate heat exchanger 4 and a second intermediate heat exchanger 52 which are connected through pipelines, wherein the first liquid pump 21 is used for driving a first cold carrying working medium to circulate in the liquid cooling circulation, equipment to be cooled is immersed in the first cold carrying working medium in the liquid cooling tail end 1 so as to realize cooling and heat dissipation of the equipment to be cooled through phase change of the first cold carrying working medium, the equipment to be cooled can be a server of a data center and the like, and the first cold carrying working medium can be electronic fluoridized liquid or mineral oil and the like and can be a working medium for realizing immersed liquid cooling circulation;
the compressor refrigeration cycle comprises a compressor 7, a throttling element 6 and a condensing heat exchanger 51 which are connected through pipelines, wherein the refrigerant in an exhaust pipeline of the compressor 7 forms heat exchange with the first cold-carrying working medium in the second intermediate heat exchanger 52, namely the second intermediate heat exchanger 52 is shared by the compressor refrigeration cycle and the liquid cooling cycle, working media in corresponding pipelines of the two cycles can form heat exchange in the second intermediate heat exchanger 52, the refrigerant is specifically refrigerant in the existing compressor refrigeration cycle system, specifically, the second intermediate heat exchanger 52 serves as an evaporation side of the compressor refrigeration cycle, and the condensing heat exchanger 51 serves as a condensation side of the compressor refrigeration cycle;
The waste heat recovery cycle comprises a recovery heat utilization device (not shown in the figure), and a second liquid pump 22 for driving a second cold-carrying working medium to circulate in the waste heat recovery cycle, wherein the second cold-carrying working medium can form heat exchange with the first cold-carrying working medium in the first intermediate heat exchanger 4, and can also form heat exchange with the refrigerant in the condensation heat exchanger 51, and in a specific embodiment, the second cold-carrying working medium can specifically adopt cooling water.
According to the technical scheme, the immersed liquid cooling cabinet cooling system is provided with two cold sources of a compressor refrigeration cycle and a waste heat recovery cycle, so that at least one of the two cold sources can be controlled to cool the liquid cooling cycle according to the temperature of a second cold-carrying working medium in the waste heat recovery cycle, natural cold sources can be utilized to a greater extent, energy consumption of a high-temperature seasonal unit is reduced, the utilization rate of the natural cold sources in transitional seasons is improved, the annual energy efficiency of the refrigerating unit (cooling system) can be improved, and the annual total energy consumption of the refrigerating unit is reduced; meanwhile, heat in the liquid cooling circulation is transferred to the recovery heat utilization equipment through the second cold-carrying working medium in the waste heat recovery circulation, so that waste heat utilization is realized, meaningless dissipation of energy is avoided, and heat pollution to the environment is reduced. It should be noted that, the liquid cooling cycle in the application is an immersed liquid cooling cycle, and the heat dissipation is carried out on the equipment to be cooled in the liquid cooling terminal 1 through the immersed liquid cooling cycle, so that the heat dissipation energy consumption of the data center can be reduced to a greater extent, the terminal heat dissipation capacity is enhanced, and meanwhile, the control difficulty and the operation noise of a cooling system of the data center are reduced.
The aforementioned waste heat recovery cycle can extract low-grade heat source to be used as nearby resident or industrial heat, save heating cost and reduce power consumption of the cold source system, at this time, the recovery heat utilization device is specifically a heat dissipation end of a radiator and the like located on the indoor side of the user, while in other feasible use conditions, the recovery heat utilization device can also be other parts, such as a domestic water heating tank, which is not described herein too much. It should be noted that, compared with the traditional air-cooled data center, the liquid return temperature of the immersed liquid cooling liquid (namely, the temperature of the liquid sent from the waste heat recovery circulation to the recovery heat utilization equipment) can reach 45 ℃, and compared with the air-cooled data center, the liquid return temperature is 15-25 ℃ higher, the waste heat recovery efficiency is higher and more stable, and the device has a larger advantage.
In some embodiments of the present invention, in some embodiments,
the liquid cooling cycle further comprises a first flow control valve bank (not referenced in the figure) connected to the first side of the first intermediate heat exchanger 4 and a second flow control valve bank (not referenced in the figure) connected to the first side of the second intermediate heat exchanger 52, the compressor refrigeration cycle further comprises a third flow control valve bank (not referenced in the figure) connected to the second side of the condensing heat exchanger 51, the waste heat recovery cycle further comprises a fourth flow control valve bank (not referenced in the figure) connected to the second side of the first intermediate heat exchanger 4, and the first flow control valve bank, the second flow control valve bank, the third flow control valve bank and the fourth flow control valve bank are capable of adjusting the heat exchange occurrence position among the first cold carrying medium, the second cold carrying medium and the refrigerant.
In the technical scheme, the first flow path control valve bank, the second flow path control valve bank, the third control valve bank and the fourth control valve bank are used for adjusting the flowing directions of the first cold-carrying working medium, the second cold-carrying working medium and the refrigerant, and then the heat exchange occurrence positions of the three heat exchange media are adjusted, so that the cooling system pipeline of the framework is reasonable in arrangement and compact in structure.
As a specific implementation manner, a first pipeline is connected to the first cold-carrying working medium inlet on the first side of the first intermediate heat exchanger 4, a second pipeline is connected to the first cold-carrying working medium outlet on the first side of the first intermediate heat exchanger 4, and the first flow path control valve group comprises a first electromagnetic valve 104 connected in series to the first pipeline and a second electromagnetic valve 103 connected in series to the second pipeline; the third pipeline is connected to the first cold-carrying medium inlet on the first side of the second intermediate heat exchanger 52, the fourth pipeline is connected to the first cold-carrying medium outlet on the first side of the second intermediate heat exchanger 52, the second flow path control valve group comprises a third electromagnetic valve 117 connected in series to the third pipeline and a fourth electromagnetic valve 116 connected in series to the fourth pipeline, one ends of the first pipeline, the second pipeline, which are far away from the first intermediate heat exchanger 4, and one ends of the third pipeline, the fourth pipeline, which are far away from the second intermediate heat exchanger 52, are connected in parallel to the fifth pipeline, the first flow path control valve group further comprises a fifth electromagnetic valve 102 connected in series to the fifth pipeline and between the first pipeline and the second pipeline, and the second flow path control valve group further comprises a sixth electromagnetic valve 118 connected in series to the fifth pipeline and between the third pipeline and the fourth pipeline.
A sixth pipeline is connected to the second cold-carrying medium inlet on the second side of the condensing heat exchanger 51, a seventh pipeline is connected to the second cold-carrying medium outlet on the second side of the condensing heat exchanger 51, and the third flow path control valve group comprises a seventh electromagnetic valve 114 connected in series to the sixth pipeline and an eighth electromagnetic valve 115 connected in series to the seventh pipeline; an eighth pipeline is connected to the second cold-carrying medium inlet of the second side of the first intermediate heat exchanger 4, a ninth pipeline is connected to the second cold-carrying medium outlet of the second side of the first intermediate heat exchanger 4, and the fourth flow path control valve group comprises a ninth electromagnetic valve 105 connected in series to the eighth pipeline and a tenth electromagnetic valve 106 connected in series to the ninth pipeline; the ends of the sixth pipeline and the seventh pipeline far away from the condensing heat exchanger 51 and the ends of the eighth pipeline and the ninth pipeline far away from the first intermediate heat exchanger 4 are connected in parallel to a tenth pipeline, the third flow path control valve group further comprises an eleventh electromagnetic valve 113 connected in series with the tenth pipeline and positioned between the sixth pipeline and the seventh pipeline, and the fourth flow path control valve group further comprises a twelfth electromagnetic valve 108 connected in series with the tenth pipeline and positioned between the eighth pipeline and the ninth pipeline. According to the technical scheme, the flow direction adjustment of each refrigerating medium is realized through the on-off control of the electromagnetic valve on each pipeline, and the flow direction control is realized by adopting the on-off of the electromagnetic valve, so that the control is simple and reliable.
In some embodiments, the waste heat recovery cycle further includes a heat recovery liquid feeding pipe (not labeled in the drawing) and a heat recovery liquid returning pipe (not labeled in the drawing), wherein an outlet of the liquid feeding pipe is communicated with one end of the eighth pipeline far away from the first intermediate heat exchanger 4, the liquid feeding pipe is connected with a thirteenth electromagnetic valve 110 in series, the liquid returning pipe is communicated with one end of the seventh pipeline far away from the condensation heat exchanger 51, and the heat recovery liquid returning pipe is connected with a fourteenth electromagnetic valve 111 in series, and the flow of the second cold-carrying working medium can be completely stopped under the working condition that the waste heat recovery cycle does not need to participate in cooling and heat dissipation through on-off control of the thirteenth electromagnetic valve 110 and the fourteenth electromagnetic valve 111.
In a preferred embodiment, the liquid return pipe is connected with a first liquid treatment device 32 in series, and/or a second liquid treatment device 31 is connected with a pipeline between the first liquid pump 21 and the first pipeline in series, so as to filter and clean the first cold-carrying working medium and the second cold-carrying working medium.
In a preferred embodiment, the cooling system further comprises: the cooling tower liquid conveying pipeline and the cooling tower liquid return pipeline are communicated, one end of the cooling tower liquid conveying pipeline is communicated with a cooling tower (not shown in the figure), the other end of the cooling tower liquid conveying pipeline is communicated with one end, far away from the first intermediate heat exchanger 4, of the eighth pipeline through a nineteenth electromagnetic valve 109, one end of the cooling tower liquid return pipeline is communicated with the cooling tower, the other end of the cooling tower liquid return pipeline is communicated with one end, far away from the condensing heat exchanger 51, of the heat recovery liquid return pipeline through a twentieth electromagnetic valve 112, the twentieth electromagnetic valve 112 is connected with the fourteenth electromagnetic valve 111 in parallel, a twenty-first electromagnetic valve 107 is connected on a flow pipeline between the second liquid pump 22 and the twelfth electromagnetic valve 108 in series, and the twenty-first electromagnetic valve 107 is connected on the ninth pipeline in series, and the cooling medium circulated in the cooling tower is the second cooling medium.
In this technical scheme, can form the mixed flow with waste heat recovery circulation through setting up the cooling tower to when the high temperature of the second cold working medium that carries in waste heat recovery circulation leads to the radiating efficiency to the liquid cooling circulation lower (energy efficiency is low, the energy consumption is high), can control the cold working medium that carries in the cooling tower to mix and circulate to waste heat recovery circulation in, and then realize the promotion of cooling efficiency. In a preferred embodiment, the second cold-carrying medium is water. It can be understood that part of pipelines of the cooling tower and the waste heat recovery cycle are shared by the electromagnetic valve, so that the cooling system provided by the invention is provided with the compressor refrigeration cycle, the waste heat recovery cycle and the cooling tower water cycle three-cold-source system, and the waste heat recovery cycle and the cooling tower water cycle are mostly shared in the aspects of the pipelines and the electromagnetic valve, thereby greatly simplifying the system structure and reducing the system construction cost while improving the energy efficiency of the system (unit).
In some embodiments, one of the liquid inlet pipe (not referenced in the figure) and the liquid outlet pipe (not referenced in the figure) of the liquid cooling end 1 is connected with a fifteenth electromagnetic valve 101 in series, and the other is connected with a flow regulating valve 9 in series; and/or the liquid cooling tail end 1 is provided with a plurality of liquid cooling tail ends 1 which are connected in parallel in the liquid cooling circulation.
In the technical scheme, the flow regulating valve 9 is positioned in the liquid cooling tail end 1, and can regulate the flow of the cooling liquid according to the real-time load change of the liquid cooling tail end 1 so as to adapt to the realization of reasonable distribution of the cooling capacity.
In another possible embodiment, the liquid cooling cycle further includes a cold storage device 8, where the cold storage device 8 is connected to the liquid inlet pipe of the liquid cooling end 1 through a fifth flow path control valve group (not labeled in the figure), and the fifth flow path control valve group can control the first cold-carrying working medium in the liquid inlet pipe to flow through or not flow through the cold storage device 8, specifically, the fifth flow path control valve group includes a sixteenth electromagnetic valve 119 connected in series to the liquid inlet pipe of the cold storage device 8, a seventeenth electromagnetic valve 121 connected in series to the liquid outlet pipe of the cold storage device 8, and an eighteenth electromagnetic valve 120 connected in series to the liquid inlet pipe and between the liquid inlet pipe and the liquid outlet pipe.
In the technical scheme, the on-off of the fifth flow path control valve group can be controlled to enable the first cold-carrying working medium to flow through or not flow through the cold accumulation device 8, so that the cold accumulation device can be opened in the low-valley period of the power grid and can release the cold accumulation amount in the peak period of the power grid, thereby realizing the effects of energy saving, consumption reduction and peak-staggering power utilization and reducing the operation and maintenance cost of the data center to a certain extent.
According to an embodiment of the present invention, there is also provided a control method of the above-mentioned submerged liquid-cooled cabinet cooling system, including the following steps:
acquiring a system operation instruction;
when the system operation instruction is a heat recovery instruction, acquiring the real-time temperature Tr of a second cold-carrying working medium in a heat recovery liquid conveying pipe of the waste heat recovery cycle;
and controlling and adjusting the heat exchange generating positions of the first cold-carrying working medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle and the second cold-carrying working medium in the waste heat recovery cycle according to the temperature interval where the Tr is located.
According to the technical scheme, the refrigerating machine is provided with two cold sources of a compressor refrigerating cycle and a waste heat recovery cycle, so that at least one of the two cold sources can be controlled to cool the liquid cooling cycle according to the temperature of a second cold carrying working medium in the waste heat recovery cycle, the natural cold source can be utilized to a greater extent, the energy consumption of a high-temperature seasonal machine set is reduced, the utilization rate of the natural cold source in a transitional season is improved, the annual energy efficiency of the refrigerating machine set (cooling system) can be improved, and the annual total energy consumption of the refrigerating machine set is reduced; meanwhile, heat in the liquid cooling circulation is transferred to the recovery heat utilization equipment through the second cold-carrying working medium in the waste heat recovery circulation, so that waste heat utilization is realized, meaningless dissipation of energy is avoided, and heat pollution to the environment is reduced.
In some embodiments, according to the temperature interval in which the Tr is located, controlling and adjusting the heat exchange occurrence positions of the first cold-carrying medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle, and the second cold-carrying medium in the waste heat recovery cycle includes:
when Tr < Tr1, the first cold-carrying medium and the second cold-carrying medium are controlled to exchange heat at the first intermediate heat exchanger 4, and the temperature of the second cold-carrying medium in the waste heat recovery cycle at this time is lower, so that the cooling capacity required by the heat exchange capacity of the first cold-carrying medium in the liquid cooling cycle can be met, therefore, the cooling system operates in a waste heat recovery natural cooling mode, as shown in fig. 2, in which: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid processing device 31, the first liquid processing device 32, the first intermediate heat exchanger 4, the cold storage device 8, the flow rate adjusting valve 9, the electromagnetic valves 101, 103, 104, 105, 106, 108, 110, 111, 113, 118, 120 are opened (i.e., turned on), and the remaining components are closed (i.e., turned off). At the moment, the system turns off the refrigerating unit (namely, the compressor refrigeration cycle), the heat recovery backwater provides cold energy at the cold source system side, the first intermediate heat exchanger 4 is used for cooling the cooling liquid (namely, the first cold carrying working medium), and the second liquid pump 22 is used for pumping the cooling liquid to the heat recovery water use end; in the cooling liquid system, cooling liquid exchanges heat with heat recovery water in the first intermediate heat exchanger 4 to finish cooling, reaches the liquid cooling tail end 1 to cool a server in the liquid cooling cabinet, and is pumped to the first intermediate heat exchanger 4 by the first liquid pump 21 to radiate heat to finish one cycle.
Or alternatively, the process may be performed,
when Tr1 is less than or equal to Tr2, the first cold-carrying medium and the second cold-carrying medium are controlled to exchange heat at the first intermediate heat exchanger 4, the first cold-carrying medium and the refrigerant are controlled to exchange heat at the second intermediate heat exchanger 52, and the second cold-carrying medium after heat exchange with the first cold-carrying medium is controlled to exchange heat with the refrigerant again at the condensation heat exchanger 51, the temperature of the second cold-carrying medium in the waste heat recovery cycle at the moment is relatively higher, and the cold requirement of the first cold-carrying medium in the liquid cooling cycle cannot be completely met, so that the operation of the compressor refrigeration cycle is controlled at the moment, meanwhile, the heat dissipation of the second cold-carrying medium to the condensation heat exchanger 52 of the compressor refrigeration cycle is utilized, and the cold energy of the refrigerant in the compressor refrigeration cycle is provided to the liquid cooling cycle at the second intermediate heat exchanger 52, so that the cooling energy efficiency of the unit is improved, and therefore, the cooling system operates in a waste heat recovery normal cooling mode, as shown in fig. 3, and the mode is as follows: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid treatment apparatus 31, the first liquid treatment apparatus 32, the first intermediate heat exchanger 4, the condensing heat exchanger 51, the second intermediate heat exchanger 52, the throttling element 6, the compressor 7, the cold storage device 8, the flow rate adjusting valve 9, the electromagnetic valves 101, 103, 104, 105, 106, 108, 110, 111, 114, 115, 116, 117, 120 are opened, and the remaining components are closed. At the moment, the system starts the refrigerating unit, the heat recovery backwater provides cold energy at the cold source system side, the cooling liquid is pre-cooled through the first intermediate heat exchanger 4, then the cooling liquid is pumped to the condensing heat exchanger 51 by the second liquid pump 22 to cool the condensing end of the refrigerating unit, and finally the cooling liquid is pumped to the heat recovery water use end; in the refrigerating unit system, the refrigerant radiates heat in the condensing heat exchanger 51, exchanges heat with the cooling liquid system in the second intermediate heat exchanger 52 after being throttled by the throttling element 6, and exchanges heat with the cold source system in the condensing heat exchanger 51 after being compressed by the compressor 7; in the cooling liquid system (namely liquid cooling circulation), cooling liquid firstly exchanges heat with heat recovery water in the first intermediate heat exchanger 4 to complete precooling, exchanges heat through the second intermediate heat exchanger 52 to complete recooling, then reaches the liquid cooling tail end 1 to cool a server in the liquid cooling cabinet, and is pumped to the first intermediate heat exchanger 4 by the first liquid pump 21 to dissipate heat to complete one-time circulation.
Or alternatively, the process may be performed,
when Tr2 is smaller than or equal to Tr3, the first cold-carrying medium is controlled to exchange heat with the refrigerant at the second intermediate heat exchanger 52, the second cold-carrying medium is controlled to exchange heat with the refrigerant at the condensing heat exchanger 51, at this time, the temperature of the second cold-carrying medium in the waste heat recovery cycle is too high, and the energy efficiency of directly adopting the second cold-carrying medium to provide cold for the liquid cooling cycle is lower, so at this time, the second cold-carrying medium in the waste heat recovery cycle is used for cooling and radiating the refrigerant in the compressor refrigeration cycle, at this time, the cooling system operates in a waste heat recovery high-temperature refrigeration mode, as shown in fig. 4, and in this mode, the following steps are adopted: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid processing device 31, the first liquid processing device 32, the condensing heat exchanger 51, the second intermediate heat exchanger 52, the throttle element 6, the compressor 7, the cold storage device 8, the flow rate adjusting valve 9, the solenoid valves 101, 102, 107, 110, 111, 114, 115, 116, 117, 120 are opened, and the remaining components are closed. At the moment, the system starts the refrigerating unit, the heat recovery backwater is used for providing cold energy at the cold source system side, the second liquid pump 22 pumps the heat recovery backwater to the condensing heat exchanger 51 to cool the condensing end of the refrigerating unit, and finally the heat recovery backwater is pumped to the heat recovery water use end; in the refrigerating unit system, the refrigerant radiates heat in the condensing heat exchanger 51, exchanges heat with the cooling liquid system in the second intermediate heat exchanger 52 after being throttled by the throttling element 6, exchanges heat with heat recovery backwater in the condensing heat exchanger 51 after being compressed by the compressor 7; in the cooling liquid system, cooling liquid reaches the liquid cooling tail end 1 to cool the server in the liquid cooling cabinet after heat exchange is carried out on the second intermediate heat exchanger 52, and then is pumped to the second intermediate heat exchanger 52 by the first liquid pump 21 to dissipate heat so as to complete one cycle.
The first inlet preset temperature Tr1 is less than the second inlet preset temperature Tr2 is less than the third inlet preset temperature Tr3, and in a specific embodiment, tr 1=15 ℃, tr 2=25 ℃, tr 3=35 ℃.
In some embodiments, when the submerged liquid-cooled cabinet cooling system includes a cooling tower feed line, a cooling tower return line,
when Tr is more than or equal to Tr3, the liquid conveying pipeline of the cooling tower is controlled to be communicated with the heat recovery liquid conveying pipe, the liquid return pipeline of the cooling tower is controlled to be communicated with the heat recovery liquid return pipe, and the heat exchange generating position of the first cold carrying working medium in the liquid cooling circulation, the refrigerant in the compressor refrigeration circulation and the second cold carrying working medium in the waste heat recovery circulation is controlled and adjusted according to the temperature interval of the real-time temperature Tr after the liquid conveying pipeline of the cooling tower and the heat recovery liquid conveying pipe are communicated and mixed. In the technical scheme, when Tr is more than or equal to Tr3, the waste heat recovery cycle and the second cold-carrying working medium in the cooling tower are adopted to provide cold for heat dissipation of the unit. The specific value of the real-time temperature Tr can be reduced because of the mixed flow of the cooling tower and the secondary refrigerant in the waste heat recovery cycle, and at the moment, the operation control strategy of the mixed cold source is different from the control strategy of the single waste heat recovery cycle.
Specifically, when the waste heat recovery function is turned on (for example, the user actively selects), the aforementioned waste heat recovery mode and the mixed cold source mode may be classified according to the type of cold source, wherein the waste heat recovery mode is mainly represented by an operation mode using only the heat recovery backwater as the cold source, which is further subdivided into a waste heat recovery natural cooling mode, a waste heat recovery normal cooling mode, and a waste heat recovery high temperature cooling mode (as described above); the mixed cold source mode is mainly represented as an operation mode which uses heat recovery backwater and cooling tower water to be mixed and then is used as a cold source, and is further subdivided into a natural cooling mode of the mixed cold source, a conventional cooling mode of the mixed cold source and a high-temperature cooling mode of the mixed cold source, in particular,
when Tr is smaller than Tr1, the cooling system operates in a natural cooling mode of the mixed cold source, as shown in FIG. 5, and the natural cooling mode is as follows: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid treatment device 31, the first liquid treatment device 32, the first intermediate heat exchanger 4, the cold storage device 8, the flow rate control valve 9, the electromagnetic valves 101, 103, 104, 105, 106, 108, 109, 110, 111, 112, 113, 118, 120 are opened, and the remaining components are closed. At this time, the system starts the cooling tower, closes the refrigerating unit, provides cold energy after the heat recovery backwater and the cooling tower are mixed at the side of the cold source system (hereinafter referred to as a mixed cold source), cools the cooling liquid through the first intermediate heat exchanger 4, and then pumps the cooling liquid to the heat recovery backwater using end and the cooling tower backwater through the second liquid pump 22; in the cooling liquid system, cooling liquid exchanges heat with the mixed cold source in the first intermediate heat exchanger 4 to finish cooling, reaches the liquid cooling tail end 1 to cool a server in the liquid cooling cabinet, and is pumped to the first intermediate heat exchanger 4 by the first liquid pump 21 to radiate heat to finish one cycle.
When Tr1 is smaller than or equal to Tr < Tr2, the cooling system operates in a mixed cold source normal refrigeration mode, as shown in FIG. 6, and the mode is as follows: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid treatment apparatus 31, the first liquid treatment apparatus 32, the first intermediate heat exchanger 4, the condensing heat exchanger 51, the second intermediate heat exchanger 52, the throttling element 6, the compressor 7, the cold storage device 8, the flow rate adjusting valve 9, the solenoid valves 101, 103, 104, 105, 106, 108, 109, 110, 111, 112, 114, 115, 116, 117, 120 are opened, and the remaining components are closed. At the moment, the system starts a cooling tower and starts a refrigerating unit, cold energy is provided by a mixed cold source at the cold source system side, the cooling liquid is pre-cooled through a first intermediate heat exchanger 4, then is pumped to a condensing heat exchanger 51 by a second liquid pump 22 to cool the condensing end of the refrigerating unit, and finally is pumped to a heat recovery water use end and cooling tower backwater; in the refrigerating unit system, the refrigerant radiates heat in the condensing heat exchanger 51, exchanges heat with the cooling liquid system in the second intermediate heat exchanger 52 after being throttled by the throttling element 6, and exchanges heat with the cold source system in the condensing heat exchanger 51 after being compressed by the compressor 7; in the cooling liquid system, the cooling liquid firstly exchanges heat with the mixed cold source in the first intermediate heat exchanger 4 to complete precooling, exchanges heat with the mixed cold source through the second intermediate heat exchanger 52 to complete recooling, then reaches the liquid cooling tail end 1 to cool the server in the liquid cooling cabinet, and is pumped to the first intermediate heat exchanger 4 by the first liquid pump 21 to dissipate heat to complete one cycle.
When Tr2 is smaller than or equal to Tr < Tr3, the cooling system operates in a mixed cold source high-temperature refrigeration mode, as shown in FIG. 7, and the mode is as follows: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid processing device 31, the first liquid processing device 32, the condensing heat exchanger 51, the second intermediate heat exchanger 52, the throttle element 6, the compressor 7, the cold storage device 8, the flow rate adjusting valve 9, the solenoid valves 101, 102, 107, 108, 109, 110, 111, 112, 114, 115, 116, 117, 120 are opened, and the remaining components are closed. At the moment, the system starts a cooling tower and starts a refrigerating unit, cold energy is provided by a mixed cold source at the cold source system side, heat recovery backwater is pumped by a second liquid pump 22 to a condensing heat exchanger 51 to cool the condensing end of the refrigerating unit, and finally the heat recovery backwater is pumped to a heat recovery water using end and the cooling tower backwater; in the refrigerating unit system, the refrigerant radiates heat in the condensing heat exchanger 51, exchanges heat with the cooling liquid system in the second intermediate heat exchanger 52 after being throttled by the throttling element 6, and exchanges heat with the mixed cold source in the condensing heat exchanger 51 after being compressed by the compressor 7; in the cooling liquid system, cooling liquid reaches the liquid cooling tail end 1 to cool the server in the liquid cooling cabinet after heat exchange is carried out on the second intermediate heat exchanger 52, and then is pumped to the second intermediate heat exchanger 52 by the first liquid pump 21 to dissipate heat so as to complete one cycle.
In some embodiments of the present invention, in some embodiments,
when the system operation instruction is a unit conventional operation instruction (for example, manual control is sent out, and the waste heat recovery function is closed at the moment), acquiring an outdoor environment temperature Tout;
and controlling and adjusting the heat exchange generating positions of the first cold-carrying working medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle and the second cold-carrying working medium in the cooling tower (namely in the cooling tower water cycle) according to the temperature interval in which the Tout is positioned.
According to the technical scheme, at least one of the two cold sources is controlled to cool the liquid cooling circulation according to the outdoor environment temperature, so that natural cold sources can be utilized to a greater extent, the energy consumption of a high-temperature seasonal unit is reduced, the utilization rate of the natural cold sources in transitional seasons is improved, the annual energy efficiency of a refrigerating unit (cooling system) can be improved, and the annual total energy consumption of the refrigerating unit is reduced.
Referring to fig. 6 in combination, according to the temperature interval in which Tout is located, controlling and adjusting the heat exchange occurrence positions of the first cold-carrying working medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle, and the second cold-carrying working medium in the cooling tower includes:
when Tout > T3, the first cold-carrying medium is controlled to exchange heat with the refrigerant at the second intermediate heat exchanger 52, and the second cold-carrying medium is controlled to exchange heat with the refrigerant at the condensation heat exchanger 51, at this time, the outdoor temperature is in a high temperature state, and the cooling system operates in a high temperature cooling mode, as shown in fig. 8, in which: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid processing device 31, the first liquid processing device 32, the condensing heat exchanger 51, the second intermediate heat exchanger 52, the throttle element 6, the compressor 7, the cold storage device 8, the flow rate adjusting valve 9, the solenoid valves 101, 102, 107, 108, 109, 112, 114, 115, 116, 117, 120 are opened, and the remaining components are closed. At the moment, the system starts a cooling tower and starts a refrigerating unit, the cooling water system side exchanges heat with outside air by the cooling tower to provide cooling water, and the second liquid pump 22 pumps the cooling water to the condensing heat exchanger 51 to cool the condensing end of the refrigerating unit; in the refrigerating unit system, the refrigerant radiates heat in the condensing heat exchanger 51, exchanges heat with the cooling liquid system in the second intermediate heat exchanger 52 after being throttled by the throttling element 6, and exchanges heat with cooling water in the condensing heat exchanger 51 after being compressed by the compressor 7; in the cooling liquid system, cooling liquid reaches the liquid cooling tail end 1 to cool the server in the liquid cooling cabinet after heat exchange is carried out on the second intermediate heat exchanger 52, and then is pumped to the second intermediate heat exchanger 52 by the first liquid pump 21 to dissipate heat so as to complete one cycle.
When T3 is greater than or equal to Tout > T2, the first cold-carrying working medium and the second cold-carrying working medium are controlled to exchange heat at the first intermediate heat exchanger 4, the first cold-carrying working medium and the refrigerant are controlled to exchange heat at the second intermediate heat exchanger 52, and the second cold-carrying working medium after heat exchange with the first cold-carrying working medium is controlled to exchange heat with the refrigerant again at the condensing heat exchanger 51, at this time, the outdoor temperature is higher, and the cooling system operates in a normal cooling mode, as shown in fig. 9, in which: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid treatment device 31, the first liquid treatment device 32, the first intermediate heat exchanger 4, the condensing heat exchanger 51, the second intermediate heat exchanger 52, the throttling element 6, the compressor 7, the cold storage device 8, the flow rate adjusting valve 9, the electromagnetic valves 101, 103, 104, 105, 106, 109, 112, 114, 115, 116, 117, 120 are opened, and the remaining components are closed. At the moment, the system starts a cooling tower and starts a refrigerating unit, the cooling water system side exchanges heat with outside air by the cooling tower to provide cooling water, the cooling water is precooled by the first intermediate heat exchanger 4, and then the cooling water is pumped to the condensing heat exchanger 51 by the second liquid pump 22 to cool the condensing end of the refrigerating unit; in the refrigerating unit system, the refrigerant radiates heat in the condensing heat exchanger 51, exchanges heat with the cooling liquid system in the second intermediate heat exchanger 52 after being throttled by the throttling element 6, and exchanges heat with cooling water in the condensing heat exchanger 51 after being compressed by the compressor 7; in the cooling liquid system, the cooling liquid firstly exchanges heat with the cooling water in the first intermediate heat exchanger 4 to complete precooling, exchanges heat through the second intermediate heat exchanger 52 to complete recooling, then reaches the liquid cooling tail end 1 to cool the server in the liquid cooling cabinet, and is pumped to the first intermediate heat exchanger 4 by the first liquid pump 21 to dissipate heat to complete one cycle.
When T2 is more than or equal to Tout > T1, the first cold-carrying working medium and the second cold-carrying working medium are controlled to exchange heat at the first intermediate heat exchanger 4, and at the moment, the outdoor temperature is lower, and the cooling system operates in a natural cooling mode, as shown in FIG. 10, and in the mode: the liquid cooling terminal 1, the first liquid pump 21, the second liquid pump 22, the second liquid treatment device 31, the first liquid treatment device 32, the first intermediate heat exchanger 4, the cold storage device 8, the flow rate control valve 9, the electromagnetic valves 101, 103, 104, 105, 106, 109, 112, 113, 118, 120 are opened, and the remaining components are closed. At the moment, the system starts a cooling tower, closes a refrigerating unit, exchanges heat between the cooling tower and outside air at the cooling water system side to provide cooling water, cools the cooling water through the first intermediate heat exchanger 4, and then pumps the cooling water to the cooling tower through the second liquid pump 22 to dissipate heat; in the cooling liquid system, cooling liquid exchanges heat with cooling water in the first intermediate heat exchanger 4 to finish cooling, reaches the liquid cooling tail end 1 to cool a server in the liquid cooling cabinet, and is pumped to the first intermediate heat exchanger 4 by the first liquid pump 21 to radiate heat to finish one cycle.
When T1 is more than or equal to Tout, the first cold-carrying working medium and the refrigerant are controlled to exchange heat at the second intermediate heat exchanger 52, and the refrigerant exchanges heat with the external environment air at the condensing heat exchanger 51, at this time, the outdoor temperature is in a low-temperature state, the second cold-carrying working medium in the cooling tower is at freezing risk in the low-temperature state, and the cooling system operates in a low-temperature cooling mode, as shown in FIG. 11, in which: the liquid cooling terminal 1, the first liquid pump 21, the second liquid processing device 31, the condensing heat exchanger 51, the second intermediate heat exchanger 52, the throttle element 6, the compressor 7, the cold storage device 8, the flow rate adjusting valve 9, the electromagnetic valves 101, 102, 116, 117, 120 are opened, and the remaining components are closed. At the moment, the system turns off the cooling tower and turns on the refrigerating unit, the refrigerant in the refrigerating unit system dissipates heat in the condensing heat exchanger 51, exchanges heat with the cooling liquid system in the second intermediate heat exchanger 52 after being throttled by the throttling element 6, and exchanges heat in the condensing heat exchanger 51 after being compressed by the compressor 7; in the cooling liquid system, cooling liquid reaches the liquid cooling tail end 1 to cool the server in the liquid cooling cabinet after heat exchange is carried out on the second intermediate heat exchanger 52, and then is pumped to the second intermediate heat exchanger 52 by the first liquid pump 21 to dissipate heat so as to complete one cycle.
The first preset ring temperature T1 is smaller than the second preset ring temperature T2 and smaller than the third preset ring temperature T3, and the values of T1, T2 and T3 are determined according to the local climate temperature and humidity distribution.
In some embodiments, when comprising a cold storage device 8, the control method further comprises:
judging whether the power grid reaches a valley period or a peak period;
when the power grid reaches the valley period, controlling a first cold-carrying working medium in a liquid inlet pipe to enter the cold accumulation device 8 for cold accumulation, and cutting off the first cold-carrying working medium from entering the cold accumulation device 8 after cold accumulation is finished; or alternatively, the process may be performed,
when the cold accumulation device 8 stores cold and the power grid reaches the peak time, a first cold-carrying working medium in the liquid inlet pipe is controlled to enter the cold accumulation device 8 so that the cold accumulation device 8 releases cold to the first cold-carrying working medium, and the first cold-carrying working medium is cut off to enter the cold accumulation device 8 after the cold release is finished.
That is, during the operation of the unit, whether to open the cold accumulation mode can be selected, when the cold accumulation mode is opened, the cold accumulation device 8, the electromagnetic valves 119 and 121 are opened, the electromagnetic valve 120 is closed, and the unit enters the cold accumulation mode; when the cold storage mode is closed, the cold storage device 8, the solenoid valves 119, 121 are closed and the solenoid valve 120 is opened. When the unit starts the cold accumulation mode, the cold accumulation device 8 can be selected to accumulate or release cold according to the peak period or the valley period of the power grid, and when the power grid reaches the valley period, the unit starts the cold accumulation mode; when the peak period of the power grid is reached, the unit starts a cooling mode. The effects of energy saving, consumption reduction, peak shifting and electricity consumption of the data center can be realized through a cold accumulation technology. It will be appreciated that when the cold storage device 8 is not storing or releasing cold, the solenoid valves 119, 121 are closed and the solenoid valve 120 is opened.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (15)
1. An immersion liquid cooled cabinet cooling system, comprising:
the liquid cooling circulation comprises a liquid cooling tail end (1), a first liquid pump (21), a first intermediate heat exchanger (4) and a second intermediate heat exchanger (52) which are connected through pipelines, wherein the first liquid pump (21) is used for driving a first cold carrying working medium to circulate in the liquid cooling circulation, and heat dissipation equipment is immersed in the first cold carrying working medium in the liquid cooling tail end (1);
the compressor refrigeration cycle comprises a compressor (7), a throttling element (6) and a condensing heat exchanger (51) which are connected through pipelines, wherein the refrigerant in an exhaust pipeline of the compressor (7) forms heat exchange with the first cold-carrying working medium in the second intermediate heat exchanger (52);
The waste heat recovery cycle comprises a second liquid pump (22) and recovery heat utilization equipment, and is used for driving a second cold-carrying working medium to circulate in the waste heat recovery cycle, wherein the second cold-carrying working medium can form heat exchange with the first cold-carrying working medium in the first intermediate heat exchanger (4), and the second cold-carrying working medium can also form heat exchange with the refrigerant in the condensing heat exchanger (51).
2. The submerged liquid cooled cabinet cooling system of claim 1, wherein the cooling system comprises,
the liquid cooling cycle further comprises a first flow path control valve group connected to the first side of the first intermediate heat exchanger (4) and a second flow path control valve group connected to the first side of the second intermediate heat exchanger (52), the compressor refrigeration cycle further comprises a third flow path control valve group connected to the second side of the condensing heat exchanger (51), the waste heat recovery cycle further comprises a fourth flow path control valve group connected to the second side of the first intermediate heat exchanger (4), and the first flow path control valve group, the second flow path control valve group, the third flow path control valve group and the fourth flow path control valve group can adjust heat exchange occurrence positions among the first cold carrying medium, the second cold carrying medium and the refrigerant.
3. The submerged liquid cooled cabinet cooling system of claim 2, wherein the cooling system comprises,
the first pipeline is connected to a first cold-carrying working medium inlet on the first side of the first intermediate heat exchanger (4), the second pipeline is connected to a first cold-carrying working medium outlet on the first side of the first intermediate heat exchanger (4), and the first flow path control valve group comprises a first electromagnetic valve (104) connected in series with the first pipeline and a second electromagnetic valve (103) connected in series with the second pipeline; the third pipeline is connected to the first cold-carrying working medium inlet of the first side of the second intermediate heat exchanger (52), the fourth pipeline is connected to the first cold-carrying working medium outlet of the first side of the second intermediate heat exchanger (52), the second flow path control valve group comprises a third electromagnetic valve (117) connected in series to the third pipeline and a fourth electromagnetic valve (116) connected in series to the fourth pipeline, one end, far away from the first intermediate heat exchanger (4), of the first pipeline and one end, far away from the second intermediate heat exchanger (52), of the third pipeline and the fourth pipeline are connected in parallel to the fifth pipeline, the first flow path control valve group further comprises a fifth electromagnetic valve (102) connected in series to the fifth pipeline and located between the first pipeline and the second pipeline, and the second flow path control valve group further comprises a sixth electromagnetic valve (118) connected in series to the fifth pipeline and located between the third pipeline and the fourth pipeline.
4. An immersed liquid-cooled cabinet cooling system as claimed in claim 3, wherein,
a sixth pipeline is connected to a second cold-carrying working medium inlet on the second side of the condensing heat exchanger (51), a seventh pipeline is connected to a second cold-carrying working medium outlet on the second side of the condensing heat exchanger (51), and the third flow path control valve group comprises a seventh electromagnetic valve (114) connected in series with the sixth pipeline and an eighth electromagnetic valve (115) connected in series with the seventh pipeline; an eighth pipeline is connected to a second cold-carrying working medium inlet of the second side of the first intermediate heat exchanger (4), a ninth pipeline is connected to a second cold-carrying working medium outlet of the second side of the first intermediate heat exchanger (4), and the fourth flow path control valve group comprises a ninth electromagnetic valve (105) connected in series with the eighth pipeline and a tenth electromagnetic valve (106) connected in series with the ninth pipeline; one end of the sixth pipeline and the seventh pipeline far away from the condensing heat exchanger (51) and one end of the eighth pipeline and the ninth pipeline far away from the first intermediate heat exchanger (4) are connected in parallel to a tenth pipeline, the third flow path control valve group further comprises an eleventh electromagnetic valve (113) which is connected in series with the tenth pipeline and is positioned between the sixth pipeline and the seventh pipeline, and the fourth flow path control valve group further comprises a twelfth electromagnetic valve (108) which is connected in series with the tenth pipeline and is positioned between the eighth pipeline and the ninth pipeline.
5. The submerged liquid cooled cabinet cooling system of claim 4, wherein the cooling system comprises a cooling system,
the waste heat recovery cycle further comprises a heat recovery liquid conveying pipe and a heat recovery liquid return pipe, wherein an outlet of the heat recovery liquid conveying pipe is communicated with one end, far away from the first intermediate heat exchanger (4), of the eighth pipeline, a thirteenth electromagnetic valve (110) is connected in series on the heat recovery liquid conveying pipe, one end, far away from the condensing heat exchanger (51), of the seventh pipeline is communicated with the heat recovery liquid return pipe, and a fourteenth electromagnetic valve (111) is connected in series on the heat recovery liquid return pipe; and/or the heat recovery liquid return pipe is connected with a first liquid treatment device (32) in series, and/or a second liquid treatment device (31) is connected with a pipeline between the first liquid pump (21) and the first pipeline in series.
6. The submerged liquid cooled cabinet cooling system of claim 5, further comprising:
cooling tower liquid feeding pipeline, cooling tower return liquid pipeline, cooling tower liquid feeding pipeline one end and cooling tower intercommunication, the other end with eighth pipeline is kept away from the one end of first intermediate heat exchanger (4) is through nineteenth solenoid valve (109) intercommunication, cooling tower liquid return pipeline one end with the cooling tower intercommunication, the other end with the heat recovery return liquid pipe is kept away from one end of condensation heat exchanger (51) is through twentieth solenoid valve (112) intercommunication, just twentieth solenoid valve (112) with fourteenth solenoid valve (111) are parallelly connected, second liquid pump (22) with connect in series on the flow path between twelfth solenoid valve (108) have twenty first solenoid valve (107) just twenty first solenoid valve (107) connect in series on the ninth pipeline, the cold-carrying working medium of cooling tower internal circulation is the second cold-carrying working medium.
7. The submerged liquid cooled cabinet cooling system of claim 1, wherein the cooling system comprises,
a fifteenth electromagnetic valve (101) is connected in series with one of a liquid inlet pipe and a liquid outlet pipe of the liquid cooling tail end (1), and a flow regulating valve (9) is connected in series with the other liquid inlet pipe and the liquid outlet pipe; and/or the liquid cooling tail end (1) is provided with a plurality of liquid cooling tail ends (1), and the plurality of liquid cooling tail ends (1) are connected in parallel in the liquid cooling circulation.
8. The submerged liquid cooled cabinet cooling system of claim 1, wherein the cooling system comprises,
the liquid cooling circulation further comprises a cold accumulation device (8), the cold accumulation device (8) is connected with the liquid inlet pipe of the liquid cooling tail end (1) through a fifth flow path control valve group, and the fifth flow path control valve group can control a first cold-carrying working medium in the liquid inlet pipe to flow through or not flow through the cold accumulation device (8).
9. The submerged liquid cooled cabinet cooling system of claim 8, wherein the cooling system comprises,
the fifth flow path control valve group comprises a sixteenth electromagnetic valve (119) connected in series with an inlet pipe of the cold accumulation device (8), a seventeenth electromagnetic valve (121) connected in series with an outlet pipe of the cold accumulation device (8), and an eighteenth electromagnetic valve (120) connected in series with the inlet pipe and positioned between the inlet pipe and the outlet pipe.
10. A method of controlling an immersion liquid cooled cabinet cooling system as claimed in any one of claims 1 to 9, comprising the steps of:
acquiring a system operation instruction;
when the system operation instruction is a heat recovery instruction, acquiring the real-time temperature Tr of a second cold-carrying working medium in a heat recovery liquid conveying pipe of the waste heat recovery cycle;
and controlling and adjusting the heat exchange generating positions of the first cold-carrying working medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle and the second cold-carrying working medium in the waste heat recovery cycle according to the temperature interval where the Tr is located.
11. The control method according to claim 10, wherein controlling and adjusting the heat exchange occurrence positions of the first cold carrier in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle, and the second cold carrier in the waste heat recovery cycle according to the temperature zone in which the Tr is located, includes:
when Tr is smaller than Tr1, controlling the first cold carrying working medium and the second cold carrying working medium to exchange heat at the first intermediate heat exchanger (4); or alternatively, the process may be performed,
when Tr1 is less than or equal to Tr2, controlling the first cold-carrying working medium to exchange heat with the second cold-carrying working medium at the first intermediate heat exchanger (4), controlling the first cold-carrying working medium to exchange heat with the refrigerant at the second intermediate heat exchanger (52), and controlling the second cold-carrying working medium after heat exchange with the first cold-carrying working medium to exchange heat with the refrigerant again at the condensing heat exchanger (51); or alternatively, the process may be performed,
When Tr2 is less than or equal to Tr3, controlling the heat exchange of the first cold-carrying working medium and the refrigerant at the second intermediate heat exchanger (52), and controlling the heat exchange of the second cold-carrying working medium and the refrigerant at the condensing heat exchanger (51);
the first water inlet preset temperature Tr1 is smaller than the second water inlet preset temperature Tr2 and smaller than the third water inlet preset temperature Tr3.
12. The control method of claim 11, wherein when the submerged cabinet cooling system comprises a cooling tower feed line, a cooling tower return line,
when Tr is more than or equal to Tr3, the liquid conveying pipeline of the cooling tower is controlled to be communicated with the heat recovery liquid conveying pipe, the liquid return pipeline of the cooling tower is controlled to be communicated with the heat recovery liquid return pipe, and the heat exchange generating position of the first cold carrying working medium in the liquid cooling circulation, the refrigerant in the compressor refrigeration circulation and the second cold carrying working medium in the waste heat recovery circulation is controlled and adjusted according to the temperature interval of the real-time temperature Tr after the liquid conveying pipeline of the cooling tower and the heat recovery liquid conveying pipe are communicated and mixed.
13. The control method according to claim 10, characterized in that,
when the system operation instruction is a unit conventional operation instruction, acquiring an outdoor environment temperature Tout;
And controlling and adjusting the heat exchange generating positions of the first cold-carrying working medium in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle and the second cold-carrying working medium in the cooling tower according to the temperature interval where the Tout is positioned.
14. The control method according to claim 13, wherein controlling and adjusting the heat exchange occurrence positions of the first cold carrier in the liquid cooling cycle, the refrigerant in the compressor refrigeration cycle, and the second cold carrier in the cooling tower according to the temperature zone in which the Tout is located, includes:
when Tout > T3, controlling the heat exchange between the first cold carrier medium and the refrigerant at the second intermediate heat exchanger 52, and controlling the heat exchange between the second cold carrier medium and the refrigerant at the condensing heat exchanger 51; or alternatively, the process may be performed,
when T3 is more than or equal to Tout > T2, controlling the first cold-carrying working medium to exchange heat with the second cold-carrying working medium at the first intermediate heat exchanger (4), controlling the first cold-carrying working medium to exchange heat with the refrigerant at the second intermediate heat exchanger (52), and controlling the second cold-carrying working medium after heat exchange with the first cold-carrying working medium to exchange heat with the refrigerant again at the condensing heat exchanger (51); or alternatively, the process may be performed,
When T2 is more than or equal to Tout > T1, controlling the first cold-carrying working medium and the second cold-carrying working medium to exchange heat at the first intermediate heat exchanger (4); or alternatively, the process may be performed,
when T1 is more than or equal to Tout, controlling the heat exchange between the first cold-carrying working medium and the refrigerant at the second intermediate heat exchanger (52), and controlling the heat exchange between the refrigerant and external ambient air at the condensing heat exchanger (51);
the first preset ring temperature T1 is less than the second preset ring temperature T2 and less than the third preset ring temperature T3.
15. A control method according to claim 10, characterized in that when comprising a cold accumulation device (8), the control method further comprises:
judging whether the power grid reaches a valley period or a peak period;
when the power grid reaches the valley period, controlling a first cold-carrying working medium in a liquid inlet pipe to enter the cold accumulation device (8) for cold accumulation, and cutting off the first cold-carrying working medium from entering the cold accumulation device (8) after cold accumulation is finished; or alternatively, the process may be performed,
when the cold accumulation device (8) is used for accumulating cold and the power grid reaches the peak time, a first cold-carrying working medium in the liquid inlet pipe is controlled to enter the cold accumulation device (8) so that the cold accumulation device (8) releases cold to the first cold-carrying working medium, and the first cold-carrying working medium is cut off to enter the cold accumulation device (8) after the cold release is finished.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117687487A (en) * | 2024-01-31 | 2024-03-12 | 苏州元脑智能科技有限公司 | Self-configuration cold and heat source liquid cooling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117687487A (en) * | 2024-01-31 | 2024-03-12 | 苏州元脑智能科技有限公司 | Self-configuration cold and heat source liquid cooling device |
| CN117687487B (en) * | 2024-01-31 | 2024-04-30 | 苏州元脑智能科技有限公司 | Self-configuration cold and heat source liquid cooling device |
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