CN116412605B - Cooling system and cooling method - Google Patents
Cooling system and cooling method Download PDFInfo
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- CN116412605B CN116412605B CN202310266778.6A CN202310266778A CN116412605B CN 116412605 B CN116412605 B CN 116412605B CN 202310266778 A CN202310266778 A CN 202310266778A CN 116412605 B CN116412605 B CN 116412605B
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- cooling
- pipe
- water flow
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- 238000001816 cooling Methods 0.000 title claims abstract description 97
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 282
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000000498 cooling water Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000000407 epitaxy Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D15/00—Devices not covered by group F25D11/00 or F25D13/00, e.g. non-self-contained movable devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a cooling system and a cooling method, which relate to the technical field of cooling. Simultaneously, this cooling system sets up first water pump, second water pump and rivers detection spare, and rivers detection spare is parallelly connected with first water pump and refrigerating unit. The corresponding cooling method can adjust the frequency of the first water pump and the frequency of the second water pump according to the water flow direction and the water flow rate of the branch pipeline where the water flow detection part is located, so that the water consumption facility requirement is met, and meanwhile energy conservation is realized.
Description
Technical Field
The invention relates to the technical field of cooling, in particular to a cooling system and a cooling method.
Background
As a representative of the third generation semiconductor material, silicon carbide (SiC) has the characteristics of wide forbidden band, high breakdown electric field, high thermal conductivity, high saturated electron mobility and the like, so that the semiconductor device prepared by adopting the silicon carbide material is suitable for high voltage, high current, high temperature, high frequency and other scenes, and has very broad prospects.
During processing of silicon carbide substrates, epitaxy, and devices, a large supply of cooling water is typically required. However, in the existing cooling system, the water-using facility is directly communicated with the refrigerating unit, and the required cooling water is refrigerated by the refrigerating unit, so that the problems of high energy consumption and short service life are common.
Disclosure of Invention
The invention aims at providing a cooling system and a cooling method, which can effectively reduce the energy consumption of a refrigerating unit and prolong the service life of the refrigerating unit.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a cooling system comprising:
the fresh air conditioner comprises an air inlet section, a heat exchange section and an air outlet section which are sequentially arranged, wherein the heat exchange section is provided with a heat exchange coil, and the heat exchange coil is positioned in the heat exchange section, and two ends of the heat exchange coil extend out of the heat exchange section to form a water inlet and a water outlet respectively;
the inlet of the water-using facility is communicated with the water outlet through a first pipeline, and the outlet of the water-using facility is communicated with the water inlet through a second pipeline;
and the refrigerating unit is arranged on the first pipeline.
In an alternative embodiment, the cooling system further comprises a first water pump, a second water pump and a branch pipeline, wherein the first water pump and the second water pump are connected in series to the first pipeline, a first end of the branch pipeline is connected to the first pipeline and located between the first water pump and the fresh air conditioner, a second end of the branch pipeline is connected to the first pipeline and located between the first water pump and the second water pump, and the branch pipeline is provided with a water flow detection part connected in parallel to the first water pump and the refrigerating unit and used for detecting the water flow direction and the water flow of the branch pipeline.
In an alternative embodiment, the first water pump, the refrigerating unit and the second water pump are sequentially connected in series along the water flow direction of the first pipeline.
In an optional embodiment, the cooling system further includes a temperature sensor and a controller, where the temperature sensor is disposed in the first pipeline and is configured to detect a water flow temperature of the first pipeline, and the controller is electrically connected to the temperature sensor, the water flow detecting element, the refrigerating unit, the first water pump and the second water pump and is configured to control working conditions of the refrigerating unit, the first water pump and the second water pump according to the water flow direction, the water flow rate and the water flow temperature.
In an alternative embodiment, the cooling system further comprises a cooling tower and a heat exchanger, wherein the heat exchanger comprises a heat pipe and a cold pipe which can exchange heat with each other, the heat pipe is communicated with the first pipeline, and the cold pipe is communicated with the cooling tower.
In an alternative embodiment, the inlet of the cold pipe is communicated with the outlet of the cooling tower through a third pipeline, the outlet is communicated with the inlet of the cooling tower through a fourth pipeline, and a third water pump is arranged on the third pipeline.
In an alternative embodiment, the water utility includes at least one of a dry cooling coil, an air conditioning coil, a process cooling water system water pipe.
In an alternative embodiment, the number of the fresh air conditioners is a plurality of the heat exchange coils of the fresh air conditioners are connected in parallel.
In a second aspect, the present invention further provides a cooling method based on the foregoing cooling system, which includes:
acquiring the water flow direction and the water flow rate of the branch pipeline;
and adjusting the frequencies of the first water pump and the second water pump according to the water flow direction and the water flow rate of the branch pipeline.
In an alternative embodiment, the step of adjusting the frequencies of the first water pump and the second water pump according to the water flow direction and the water flow rate of the branch pipeline specifically includes:
when the water flow direction is a first direction and the water flow rate is greater than a first threshold value, controlling the frequency of the first water pump to rise until the water flow rate is less than or equal to the first threshold value;
when the water flow direction is the second direction and the water flow rate is greater than a second threshold value, controlling the frequency of the first water pump to be reduced until the water flow rate is less than or equal to the second threshold value;
wherein the first direction is a direction from the first end to the second end, and the second direction is a direction from the second end to the first end.
The beneficial effects of the embodiment of the invention include, for example:
this cooling system includes fresh air conditioner, water facility and refrigerating unit, and fresh air conditioner is including the air inlet section, heat exchange section and the air-out section that set gradually, and the heat exchange section is provided with heat exchange coil, and heat exchange coil is located the heat exchange section and the heat exchange section is stretched out at both ends in order to form water inlet and delivery port respectively, and the import of water facility communicates with the delivery port through first pipeline, and the export communicates with the water inlet through the second pipeline, and refrigerating unit sets up in first pipeline. The cooling system uses the existing fresh air conditioner in a factory building or a factory as a main cold source, utilizes the heat exchange section of the fresh air conditioner to cool water, uses the refrigerating unit as a supplementary cold source, and cooperates with the fresh air conditioner to cool water when the cooling effect of the fresh air conditioner cannot meet the requirement of water facilities, so that the operation times, power, duration and the like of the refrigerating unit can be reduced, the energy consumption of the refrigerating unit is reduced, and the service life of the refrigerating unit is prolonged.
Simultaneously, this cooling system sets up first water pump, second water pump and rivers detection spare, and rivers detection spare is parallelly connected with first water pump and refrigerating unit. The corresponding cooling method can adjust the frequency of the first water pump and the frequency of the second water pump according to the water flow direction and the water flow rate of the branch pipeline where the water flow detection part is located, so that the water consumption facility requirement is met, and meanwhile energy conservation is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a cooling system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fresh air conditioner according to a first embodiment of the present invention;
FIG. 3 is a control block diagram of a cooling system according to a first embodiment of the present invention;
FIG. 4 is a flow chart of a cooling method according to a second embodiment of the present invention;
fig. 5 is a flowchart of the substeps of step S200 according to the second embodiment of the present invention.
Icon: 100-fresh air conditioner; 102-an air inlet section; 104-a heat exchange section; 106, an air outlet section; 108-a heat exchange coil; 1082-inlet; 1084-water outlet; 110-a first line; 112-a first water pump; 114-a second water pump; 116-refrigerating units; 120-a second pipeline; 130-branch line; 200-a water utility; 300-a water flow detection member; 400-cooling tower; 410-a third line; 412-a third water pump; 420-fourth pipeline; 500-heat exchanger; 600-a controller; 610-temperature sensor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 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 definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment:
referring to fig. 1 and 2, the present invention provides a cooling system that can be used to supply cooling water to a water facility 200 required for silicon carbide substrate, epitaxy and device processing, so as to reduce energy consumption while ensuring normal processing of silicon carbide.
In detail, the cooling system comprises a fresh air conditioner 100, a water-using facility 200 and a refrigerating unit 116, wherein the fresh air conditioner 100 comprises an air inlet section 102, a heat exchange section 104 and an air outlet section 106 which are sequentially arranged, the heat exchange section 104 is provided with a heat exchange coil 108, the heat exchange coil 108 is positioned in the heat exchange section 104, and two ends of the heat exchange coil 108 extend out of the heat exchange section 104 to form a water inlet 1082 and a water outlet 1084 respectively. The inlet of the water utility 200 communicates with the water outlet 1084 through the first conduit 110, the outlet communicates with the water inlet 1082 through the second conduit 120, and the refrigeration unit 116 is disposed in the first conduit 110.
The number of the fresh air conditioners 100 is plural, such as three, four, five, six, etc. The heat exchange coils 108 of the plurality of fresh air conditioners 100 are connected in parallel and can work simultaneously.
The cooling effect on water can be improved as much as possible by adopting a mode of connecting a plurality of fresh air conditioners 100 in parallel, and generally, the plant area or the factory building of silicon carbide production has extremely high demand on fresh air, and more fresh air conditioners 100 are generally arranged, and the fresh air conditioners 100 are scattered at each position of the plant area or the factory building. The cooling system utilizes the existing fresh air conditioners 100 to connect the fresh air conditioners 100 in parallel through the pipelines, so that water can be split into a plurality of fresh air conditioners 100, self-cooling is realized by heat exchange between the fresh air conditioners 100 and fresh air passing through the heat exchange section 104 in the heat exchange coils 108 of the fresh air conditioners 100, and then the fresh air conditioners 100 flow out and are converged in the first pipeline 110, and the cooling effect can be effectively improved.
The water usage facility 200 includes at least one of a dry cooling coil, an air conditioning coil, and a process cooling water system water pipe, which may be specifically selected according to the requirement, and in this embodiment, the water usage facility 200 includes the dry cooling coil, the air conditioning coil, and the process cooling water system water pipe, which are connected in parallel. Thus avoiding the mutual influence of water among the three. In other embodiments, the water-using facility 200 may be any two or any one of a dry-cooling coil, an air-conditioning coil, and a process cooling water system water pipe; the water-using facility 200 may be a cleaning device or the like.
In order to further improve the cooling effect on water, in this embodiment, the cooling system further includes a cooling tower 400 and a heat exchanger 500, wherein the heat exchanger 500 includes a heat pipe (not shown) and a cold pipe (not shown) that can exchange heat with each other, the heat pipe is in communication with the first pipe 110, and the cold pipe is in communication with the cooling tower 400 for circulating the cooling water supplied from the cooling tower 400. In detail, the inlet of the cold pipe communicates with the outlet of the cooling tower 400 through the third pipe 410, and the outlet communicates with the inlet of the cooling tower 400 through the fourth pipe 420.
The number of cooling towers is generally plural and connected in parallel to each other to improve the cooling effect. The heat exchanger 500 may have different structures according to needs, and in this embodiment, the heat exchanger 500 is a plate heat exchanger. The plate heat exchanger 500 is a high efficiency heat exchanger formed by stacking a series of metal sheets having a corrugated shape. A thin rectangular channel is formed between various plates, and heat exchange is carried out through the plates, so that the heat exchange device has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, wide application, long service life and the like.
In order to ensure the water flow power between the cooling tower 400 and the heat exchanger 500, in the present embodiment, a third water pump 412 is provided on the third pipeline 410 for providing power to the water flow in the third pipeline 410 and the fourth pipeline 420. Further, two stop valves are further disposed on the third pipeline 410, and the two stop valves are respectively disposed on two sides of the third water pump 412, so that a user can control the on-off of the third pipeline 410 according to the requirement.
By providing the cooling tower 400 and the heat exchanger 500, cooling of water can be further achieved, and the cooling effect of the cooling system can be improved. Especially in winter, the cooling tower 400 is generally idle, and can be fully utilized.
Further, the cooling system further includes a first water pump 112, a second water pump 114, and a branch pipe 130, where the first water pump 112 and the second water pump 114 are connected in series to the first pipe 110, and in detail, the first water pump 112, the refrigerating unit 116, and the second water pump 114 are connected in series in sequence along the water flow direction in the first pipe 110 (i.e. the direction from the fresh air conditioner 100 to the water utility 200).
The first end of the branch pipe 130 is connected to the first pipe 110 and located between the first water pump 112 and the fresh air conditioner 100 (specifically located between the first water pump 112 and the heat exchanger 500), and the second end of the branch pipe 130 is connected to the first pipe 110 and located between the first water pump 112 and the second water pump 114 (specifically located between the refrigerating unit 116 and the second water pump 114). The branch pipe 130 is provided with a water flow detecting member 300, and the water flow detecting member 300 is connected in parallel with the first water pump 112 and the refrigerating unit 116, for detecting the water flow direction and the water flow rate of the branch pipe 130.
The water flow detecting member 300 may include a flow sensor and a flow direction sensor for detecting the flow rate and the flow direction of the water flow, respectively.
The first water pump 112 and the second water pump 114 jointly provide power for the water flow of the whole cooling system, so that cooling water circularly flows among the fresh air conditioner 100, the water using facility 200 and the refrigerating unit 116. Generally, the two systems need to operate simultaneously, because the pipeline stroke of the whole cooling system is long, the alternative operation can not provide enough water flow power, and accordingly, can not provide enough water flow, and naturally, the requirement of the water facility 200 can not be met. Of course, in some special cases, when the demand of the water usage facility 200 is reduced, the first water pump 112 may be operated alternatively.
Further, referring to fig. 3, the cooling system further includes a temperature sensor 610 and a controller 600, wherein the temperature sensor 610 is disposed in the first pipeline 110 for detecting a water flow temperature of the first pipeline 110. The controller 600 is electrically connected to the temperature sensor 610, the water flow detecting element 300, the refrigerating unit 116, the first water pump 112 and the second water pump 114, and is used for controlling the working conditions of the refrigerating unit 116, the first water pump 112 and the second water pump 114 according to the water flow direction, the water flow and the water flow temperature.
The working principle and the working process of the cooling system are as follows:
the first water pump 112 and the second water pump 114 are started together to drive the water in the pipeline of the whole cooling system to circularly flow. The cooling water in the first pipeline 110 enters from the inlet of the water using facility 200, flows through the water using facility 200, and is heated up after heat exchange with the water using facility 200 (the heating up range is determined according to practical conditions, for example, the heating up range is increased from 14 degrees to 21 degrees), so that the water using facility 200 is cooled, and the cooling capacity supply of the water using facility 200 is realized.
Then, the warmed cooling water flows out from the outlet of the water-using facility 200, flows through the second pipeline 120, enters the heat exchange coil 108 of the fresh air conditioner 100 through the water inlet 1082, exchanges heat with the fresh air passing through the heat exchange section 104 in the process of flowing through the heat exchange coil 108, and cools down (the cooling amplitude is determined according to practical conditions, for example, the cooling amplitude is reduced from 21 degrees to 16 degrees), so that the heat exchange coil 108 can be heated, the heat exchange coil 108 is prevented from being frozen and cracked in winter, and meanwhile, the fresh air passing through the heat exchange section 104 in the fresh air conditioner 100 can be heated, so that the temperature regulation efficiency of the fresh air conditioner 100 is improved.
The cooled cooling water flows out from the water outlet 1084, flows along the first pipeline 110, exchanges heat with the cooling water of the cold pipe (that is, the cooling water provided to the cold pipe by the cooling tower 400 through the third pipeline 410 and the fourth pipeline 420) when passing through the heat pipe of the heat exchanger 500, further cools down (the cooling amplitude is determined according to practical situations, for example, the cooling water is reduced from 16 degrees to 14 degrees), then the cooled cooling water after cooling down again continues to flow along the first pipeline 110, and the water heated up in the cold pipe returns to the cooling tower 400 for cooling down again.
If the temperature of the cooling water cooled by the fresh air conditioner 100 and the cooling tower 400 can meet the requirement of the water using facility 200, the refrigerating unit 116 is not started, so that the energy consumption of the refrigerating unit 116 is reduced, the service life of the refrigerating unit is prolonged, and the cooling water flows through the first water pump 112, the non-operating refrigerating unit 116 and the second water pump 114 in sequence along the first pipeline 110 and returns to the water using facility 200 again, so as to realize cooling of the water using facility 200.
If the temperature of the cooling water cooled by the fresh air conditioner 100 and the cooling tower 400 cannot meet the requirement of the water using facility 200, the refrigerating unit 116 needs to be turned on, and the cooling water is further cooled when flowing through the refrigerating unit 116, so that the temperature of the cooling water in the first pipeline 110 is further reduced to meet the requirement of the water using facility 200.
In addition, the water flow detecting member 300 can determine the frequency matching degree of the first water pump 112 and the second water pump 114 by detecting the water flow direction and the water flow in the branch pipeline 130, so as to adjust the flow of the first water pump 112 to match the frequency of the second water pump 114, so that the water flow power and the flow provided by the two water pumps are matched, the efficient flow of the cooling water in the first pipeline 110 is ensured, and the energy consumption is reduced as much as possible while the requirement of the water using facility 200 is met.
In summary, the cooling system uses the existing fresh air conditioner 100 as a main cold source, utilizes the heat exchange section 104 of the fresh air conditioner 100 to cool water, uses the refrigerating unit 116 as a supplementary cold source, and cooperates with the fresh air conditioner 100 to cool water when the cooling effect of the fresh air conditioner 100 cannot meet the requirement of the water facility 200, so that the operation times, power, duration and the like of the refrigerating unit 116 can be reduced, the energy consumption of the refrigerating unit 116 is reduced, and the service life of the refrigerating unit 116 is prolonged. Meanwhile, the water flow detection piece 300 is arranged in parallel with the first water pump 112 and the refrigerating unit 116, and the matching degree of the frequencies of the first water pump 112 and the second water pump 114 can be judged by detecting the water flow direction and the water flow rate of the branch pipeline 130, so that the frequency of the first water pump 112 is adjusted to be matched with the frequency of the second water pump 114, and energy conservation is realized while the requirement of the water using facility 200 is met.
Second embodiment:
referring to fig. 4 and 5, the present embodiment provides a cooling method based on the cooling system of the first embodiment, which includes the following steps:
step S100, the water flow direction and the water flow rate of the branch pipeline 130 are obtained. The water flow direction and the water flow rate are detected by the water flow detecting member 300 and then sent to the controller 600 for the controller 600 to obtain.
Step S200, adjusting the frequency of the first water pump 112 and the second water pump 114 according to the water flow direction and the water flow rate of the branch pipeline 130. The frequency of the second water pump 114 is generally determined by the user according to the actual needs of the water utility 200, so the frequency of the second water pump 114 is not typically adjusted, but rather the frequency of the first water pump 112 is adjusted so that the frequency of the first water pump 112 matches the frequency of the second water pump 114. Of course, in some cases, such as when the frequency of the first water pump 112 cannot be further adjusted, the frequency of the first water pump 112 may be adjusted 114 to match the frequency of the first water pump 112.
Further, step S200 (i.e. adjusting the frequency of the first water pump 112 and the second water pump 114 according to the water flow direction and the water flow rate of the branch pipe 130) specifically includes:
and S210, when the water flow direction is the first direction and the water flow rate is greater than a first threshold value, controlling the frequency of the first water pump 112 to be increased until the water flow rate is less than or equal to the first threshold value.
The first direction is a direction from the first end to the second end (at this time, the first end is a water inlet end, and the second end is a water outlet end), and the first threshold is set in the controller 600 by the user according to actual needs and experience. When the water flow in the branch pipe 130 flows from the first end to the second end, it is indicated that the frequency of the first water pump 112 is obviously lower than that of the second water pump 114, that is, the frequencies of the two water pumps are not matched, the water flow power and the flow provided by the first water pump 112 are smaller, at this time, the frequency of the first water pump 112 needs to be controlled to be increased to be close to that of the second water pump 114 until the water flow in the branch pipe 130 is lower than the first threshold, that is, the water flow in the branch pipe 130 basically does not pass through (the flow of the branch pipe 130 is ideally 0), and at this time, the frequencies of the first water pump 112 and the second water pump 114 are matched, so that the cooling capacity requirement of the water using facility 200 can be met.
And step S220, when the water flow direction is the second direction and the water flow rate is greater than a second threshold value, controlling the frequency of the first water pump 112 to be reduced until the water flow rate is less than or equal to the second threshold value.
The second direction is a direction from the second end to the first end (at this time, the second end is a water inlet end, and the first end is a water outlet end), and the second threshold is set in the controller 600 by the user according to actual needs and experience, and may be equal to or not equal to the first threshold. When the water flow in the branch pipe 130 flows from the second end to the first end, it is indicated that the frequency of the first water pump 112 is significantly higher than that of the second water pump 114, that is, the frequencies of the two water pumps are not matched, the water flow power and the flow provided by the first water pump 112 are larger, at this time, the first water pump 112 needs to be controlled to be down-converted to have the frequency close to that of the second water pump 114 until the water flow in the branch pipe 130 is lower than the second threshold, that is, the water flow in the branch pipe 130 basically does not pass through (the flow of the branch pipe 130 is ideally 0), and at this time, the frequencies of the first water pump 112 and the second water pump 114 are matched, so that the energy consumption can be minimized while meeting the cold energy requirement of the water using facility 200.
In summary, the present cooling method adjusts the frequencies of the first water pump 112 and the second water pump 114 according to the water flow direction and the water flow rate of the branch pipe 130, and when there is no water flow in the branch pipe 130, the frequencies of the two are matched, so that energy saving can be achieved under the condition of meeting the demand of the water using facility 200.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. A cooling system, comprising:
the fresh air conditioner (100), the fresh air conditioner (100) comprises an air inlet section (102), a heat exchange section (104) and an air outlet section (106) which are sequentially arranged, the heat exchange section (104) is provided with a heat exchange coil (108), the heat exchange coil (108) is positioned in the heat exchange section (104) and two ends of the heat exchange coil extend out of the heat exchange section (104) to form a water inlet (1082) and a water outlet (1084) respectively;
-a water usage facility (200), an inlet of the water usage facility (200) being in communication with the water outlet (1084) via a first pipe (110), an outlet being in communication with the water inlet (1082) via a second pipe (120);
-a refrigeration unit (116), the refrigeration unit (116) being arranged to the first pipeline (110);
the cooling system further comprises a first water pump (112), a second water pump (114) and a branch pipe (130), wherein the first water pump (112) and the second water pump (114) are connected in series with the first pipeline (110), a first end of the branch pipe (130) is connected with the first pipeline (110) and is located between the first water pump (112) and the fresh air conditioner (100), a second end of the branch pipe (130) is connected with the first pipeline (110) and is located between the first water pump (112) and the second water pump (114), the branch pipe (130) is provided with a water flow detection part (300), the water flow detection part (300) is connected with the first water pump (112) and the refrigerating unit (116) in parallel, and is used for detecting the water flow direction and the water flow of the branch pipe (130) along the water flow direction of the first pipeline (110), and the first water pump (112), the refrigerating unit (116) and the second water pump (114) are connected in series in sequence.
2. The cooling system according to claim 1, further comprising a temperature sensor (610) and a controller (600), wherein the temperature sensor (610) is disposed in the first pipeline (110) and is configured to detect a water flow temperature of the first pipeline (110), and the controller (600) is electrically connected to the temperature sensor (610), the water flow detecting member (300), the refrigeration unit (116), the first water pump (112) and the second water pump (114) simultaneously and is configured to control a working condition of the refrigeration unit (116), the first water pump (112) and the second water pump (114) according to the water flow direction, the water flow rate and the water flow temperature.
3. The cooling system according to claim 1, further comprising a cooling tower (400) and a heat exchanger (500), the heat exchanger (500) comprising a heat pipe and a cold pipe that are heat exchangeable with each other, the heat pipe being in communication with the first pipe (110), the cold pipe being in communication with the cooling tower (400).
4. A cooling system according to claim 3, characterized in that the inlet of the cooling pipe is connected to the outlet of the cooling tower (400) via a third pipe (410), the outlet is connected to the inlet of the cooling tower (400) via a fourth pipe (420), and a third water pump (412) is arranged on the third pipe (410).
5. The cooling system of claim 1, wherein the water utility (200) comprises at least one of a dry cooling coil, an air conditioning coil, a process cooling water system water pipe.
6. The cooling system according to claim 1, characterized in that the number of fresh air conditioners (100) is a plurality and that the heat exchanging coils (108) of the plurality of fresh air conditioners (100) are connected in parallel with each other.
7. A cooling method based on the cooling system according to claim 1, comprising:
acquiring the water flow direction and the water flow rate of the branch pipeline (130);
the frequency of the first water pump (112) and the second water pump (114) is adjusted according to the water flow direction and the water flow rate of the branch pipe (130).
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