CN109269133B - Cooling system and cooling device - Google Patents
Cooling system and cooling device Download PDFInfo
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- CN109269133B CN109269133B CN201811133774.6A CN201811133774A CN109269133B CN 109269133 B CN109269133 B CN 109269133B CN 201811133774 A CN201811133774 A CN 201811133774A CN 109269133 B CN109269133 B CN 109269133B
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- cooling medium
- pipe section
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- 238000001816 cooling Methods 0.000 title claims abstract description 168
- 239000002826 coolant Substances 0.000 claims abstract description 194
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 142
- 238000009826 distribution Methods 0.000 claims abstract description 55
- 238000007906 compression Methods 0.000 claims abstract description 24
- 238000005057 refrigeration Methods 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 23
- 239000003507 refrigerant Substances 0.000 claims abstract description 17
- 239000007921 spray Substances 0.000 claims description 25
- 239000000945 filler Substances 0.000 claims description 11
- 239000000498 cooling water Substances 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 abstract description 7
- 230000008020 evaporation Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000009776 industrial production Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012824 chemical production Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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
- F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention relates to the field of refrigeration, and discloses a cooling system and cooling equipment, wherein the cooling system comprises a cooling medium pipeline, a compression refrigeration device and an evaporation cooling device; the compression refrigeration device comprises a compressor, a condenser, a throttling component and an evaporator, wherein the compressor, the condenser, the throttling component and the evaporator are sequentially connected by pipelines to form a refrigerant circulation loop; the evaporative cooling device comprises a water tank, an air duct, a first water distribution device and a second water distribution device, wherein the first water distribution device is connected with the water tank, a cooling channel is arranged in the condenser, an inlet of the cooling channel is connected with the water tank, and an outlet of the cooling channel is connected with the second water distribution device; the cooling medium pipeline comprises a first pipe section and a second pipe section, and a switching valve is arranged on the cooling medium pipeline and can be switched to enable cooling medium to flow through the first pipe section only or flow through the second pipe section only or flow through the first pipe section and then flow through the second pipe section. The cooling system and the cooling equipment can meet the cooling requirement and have low energy consumption.
Description
Technical Field
The invention relates to the field of refrigeration, in particular to a cooling system and cooling equipment.
Background
The cooling process is a part of the whole industrial production process and is one of important links for ensuring the normal operation of industrial production. Parameters during cooling are determined according to the industrial production process. The thermal parameters of the cooling medium determine whether the industrial production process is normal, for example, an air-water cooling heat exchanger of a large motor requires the temperature of the cooling medium to be not higher than 25-35 ℃, otherwise, the normal operation of the motor is influenced; the thermal parameters of the cooling medium are often related to the efficiency of industrial production, and taking a power plant as an example, the medium-voltage unit efficiency of a fossil fuel power plant can be improved by 0.47% and the high-voltage unit efficiency can be improved by 0.35% when the temperature of the cooling medium is reduced by 1 ℃; the thermal parameters of the cooling medium also have an effect on the quality of the industrial products, for example, in chemical production, the temperature of the materials in certain polymerization reaction kettles is required to be constant within a range of +/-1 ℃ or even smaller, otherwise, the components of the reaction products are affected. With the development of industry, the demand of cooling medium is also rapidly increased, and the acquisition of cooling medium often consumes resources and energy sources, which affects the environment.
The cooling modes commonly used at present comprise direct current cooling and circulating cooling, and the common modes of circulating cooling comprise cooling tower cooling and refrigerating machine cooling.
The direct current cooling mode is a cooling mode that the cooling medium is discharged after being used once, and common modes include river water cooling, lake cooling, seawater cooling and the like. The direct current cooling mode is limited by the water taking condition, the initial state (initial water temperature and water quality) of the water body to be taken, the allowable highest temperature of the cooling water discharged into the water body, the maximum allowable temperature rise of the natural water body and other factors, and the direct current cooling has the possibility of causing the thermal pollution of the water body.
The cooling tower is a device for heat-moisture exchange by directly contacting water with air, and the water is cooled in the tower mainly through the evaporative cooling effect of the water. The cooling capacity of the cooling tower is affected by the atmospheric temperature and humidity. The atmospheric thermal parameters fluctuate greatly throughout the year, and if the temperature of the cooling medium is lower than the wet bulb temperature of the air, the cooling tower loses the cooling capacity.
A refrigerator is a machine that transfers heat of a cooled object having a relatively low temperature to an environmental medium to thereby obtain cold. The refrigerator cooling has strong adaptability to the thermal parameters of the atmosphere, but compared with direct-current cooling and cooling tower cooling, the refrigerator cooling consumes more energy, and when the outdoor atmospheric temperature is low in the transitional season and winter, the natural cold source cannot be utilized to provide the required cold.
Disclosure of Invention
The invention aims to solve the problem that the cooling requirement cannot be met or the energy consumption is high when the cooling requirement is met in the prior art, and provides a cooling system which can meet the cooling requirement and has low energy consumption.
It is a further object of the present invention to provide a cooling device comprising the cooling system described above.
In order to achieve the above object, an aspect of the present invention provides a cooling system including a cooling medium line carrying a cooling medium, and a compression refrigeration device and an evaporation cooling device for cooling the cooling medium; the compression refrigeration device comprises a compressor, a condenser, a throttling component and an evaporator, wherein the compressor, the condenser, the throttling component and the evaporator are sequentially connected through a pipeline carrying refrigerant to form a refrigerant circulation loop; the evaporative cooling device comprises a water tank, an air duct arranged above the water tank, and a first water distribution device and a second water distribution device which are arranged in the air duct, wherein the first water distribution device is connected with the water tank, a cooling channel for circulating cooling water is arranged in the condenser, an inlet of the cooling channel is connected with the water tank, and an outlet of the cooling channel is connected with the second water distribution device; the cooling medium pipeline comprises a first pipe section capable of being sprayed by the first water distribution device and a second pipe section capable of being cooled by the evaporator, and a switching valve is arranged on the cooling medium pipeline and can be switched to enable the cooling medium to flow through the first pipe section only or flow through the second pipe section only or flow through the first pipe section and then flow through the second pipe section.
In the above technical solution, assuming that the evaporative cooling device operates alone when the air wet bulb temperature is a first set value (for example, 17 ℃) to reduce the cooling medium to a target temperature (for example, 20 ℃), the temperature of the cooling medium entering from the inlet of the cooling medium pipeline is a second set value (for example, 25 ℃), when the air wet bulb temperature is less than or equal to the first set value, the switching valve can be switched to enable the cooling medium to flow through only the first pipe section, so as to perform spray cooling through the first water distribution device; when the air wet bulb temperature is more than or equal to a second set value, the evaporative cooling device loses the cooling capacity for the cooling medium, and the switching valve can be switched to enable the cooling medium to flow through the second pipe section only so as to be cooled through the evaporator; when the first set value is smaller than the air wet bulb temperature and smaller than the second set value, the evaporative cooling device has certain cooling capacity but cannot cool the cooling medium to the target temperature, and the switching valve can be switched to enable the cooling medium to be sprayed and cooled through the first water distribution device through the first pipe section and then cooled through the evaporator through the second pipe section, so that the cooling system can meet the cooling requirement, the energy consumption is smaller, and the cost is reduced.
Preferably, the switching valve comprises a first three-way valve, an inlet of the first three-way valve is connected with an inlet of the cooling medium pipeline, a first outlet of the first three-way valve is connected with an inlet of the first pipe section, the cooling medium pipeline comprises a third pipe section connected with an outlet of the first pipe section and the second pipe section, and a second outlet of the first three-way valve is connected with the third pipe section through a pipeline.
Preferably, the switching valve further comprises a second three-way valve, an inlet of the second three-way valve is connected with an outlet of the third pipe section, a first outlet of the second three-way valve is connected with an outlet of the cooling medium pipeline, a second outlet of the second three-way valve is connected with an inlet of the second pipe section, and an outlet of the second pipe section is connected with an outlet of the cooling medium pipeline.
Preferably, the second pipe section includes a cooling medium passage provided in the evaporator for the cooling medium to flow therethrough, a first inlet pipe section connected to an inlet of the cooling medium passage and an outlet of the first pipe section, and a first outlet pipe section connected to an outlet of the cooling medium passage and an outlet of the cooling medium pipe.
Preferably, the cooling system includes an intermediate heat exchanger, a coolant passage through which coolant flows is provided in the evaporator, a coolant circulation circuit is formed between an outlet of the coolant passage and a primary side inlet of the intermediate heat exchanger and between a primary side outlet of the intermediate heat exchanger and an inlet of the coolant passage through a coolant-carrying pipe, and the second pipe section includes a coolant passage provided in the intermediate heat exchanger through which the coolant flows, a second inlet pipe section connected to the inlet of the coolant passage and an outlet of the first pipe section, and a second outlet pipe section connected to the outlet of the coolant passage and an outlet of the coolant pipe.
Preferably, the cooling system comprises a third three-way valve, the outlet of the coolant channel in the evaporator is connected with the inlet of the third three-way valve, the first outlet of the third three-way valve is connected with the primary side inlet of the intermediate heat exchanger, and the second outlet of the third three-way valve is connected with a pipeline between the inlet of the coolant channel in the evaporator and the primary side outlet of the intermediate heat exchanger.
Preferably, the cooling system comprises: a fourth three-way valve; the main pipeline is connected with the water tank and the first inlet of the fourth three-way valve outside the air duct; the first branch pipeline is connected with a first outlet of the fourth three-way valve and the first water distribution device; and a second branch line connecting a second outlet of the fourth three-way valve and an inlet of the cooling passage of the condenser.
Preferably, a spray pump and/or a blow-down valve are arranged on the main pipeline.
Preferably, the evaporative cooling device comprises a water replenishing component connected with the water tank for replenishing water to the water tank; and/or the first pipe section is positioned below the first water distribution device, and the second water distribution device is positioned below the first pipe section; and/or a filler is arranged in the air duct, and the filler is positioned below the first water distribution device and the second water distribution device; and/or the bottom of the air cylinder is provided with an air inlet, the top of the air cylinder is provided with an air outlet, and a fan is installed at the air outlet.
A second aspect of the present invention provides a cooling apparatus comprising the cooling system described above and a device to be cooled, the cooling medium in the cooling medium line being for cooling the device to be cooled.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic view showing the structure of a cooling system according to a first embodiment of the present invention;
Fig. 2 is a schematic view of the structure of the cooling system according to the first embodiment of the present invention when only the evaporative cooling apparatus is operated;
FIG. 3 is a schematic view showing the structure of the cooling system according to the first embodiment of the present invention when only the compression refrigeration apparatus is operated;
Fig. 4 is a schematic view of the structure of the cooling system according to the first embodiment of the present invention when the evaporative cooling apparatus and the compression refrigeration apparatus are operated simultaneously;
fig. 5 is a schematic view showing the structure of a cooling system according to a second embodiment of the present invention;
FIG. 6 is a schematic view of the cooling system of the second embodiment of the present invention when only the evaporative cooling apparatus is in operation;
FIG. 7 is a schematic view showing the structure of a cooling system according to a second embodiment of the present invention when only a compression refrigeration apparatus is operated;
Fig. 8 is a schematic view showing a structure of a cooling system according to a second embodiment of the present invention when an evaporative cooling apparatus and a compression refrigeration apparatus are operated simultaneously.
Description of the reference numerals
The cooling medium system comprises a cooling medium pipeline, a first pipeline section, a second pipeline section, a first inlet pipeline section, a first outlet pipeline section, a second inlet pipeline section, a second outlet pipeline section, a third pipeline section, a 2-compression refrigerating device, a compressor 21, a condenser 22, a throttling part 23, an evaporator 24, an evaporation cooling device 3, a water tank 31, a wind drum 32, a first water distribution device 33, a second water distribution device 34, a first three-way valve 41, a second three-way valve 42, a third three-way valve 5, a fourth three-way valve 6, a water supplementing part 7, a packing 8, a fan 9, an inlet of the cooling medium pipeline A, an outlet of the cooling medium pipeline B, an intermediate heat exchanger R, a main pipeline L, a first branch pipeline L1, a second branch pipeline L2, a spray pump P1, a circulating pump P2, a drain valve F and an air inlet K.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise specified, terms such as "upper, lower, left, and right" and "upper, lower, left, and right" are used generically to refer to the upper, lower, left, and right illustrated in the drawings; "inner and outer" means the inner and outer relative to the contour of the respective component itself.
In order to achieve the above object, the present application provides, on the one hand, a cooling system comprising a cooling medium line 1 carrying a cooling medium, and a compression refrigeration device 2 and an evaporative cooling device 3 for cooling the cooling medium; wherein: the compression refrigeration device 2 comprises a compressor 21, a condenser 22, a throttling part 23 and an evaporator 24, wherein the compressor 21, the condenser 22, the throttling part 23 and the evaporator 24 are sequentially connected by a pipeline carrying refrigerant to form a refrigerant circulation loop; the evaporative cooling device 3 comprises a water tank 31, an air duct 32 arranged above the water tank 31, and a first water distribution device 33 and a second water distribution device 34 arranged in the air duct 32, wherein the first water distribution device 33 is connected with the water tank 31, a cooling channel for circulating cooling water is arranged in the condenser 22, the inlet of the cooling channel is connected with the water tank 31, and the outlet of the cooling channel is connected with the second water distribution device 34; the cooling medium pipeline 1 comprises a first pipe section 11 capable of being sprayed by the first water distribution device 33 and a second pipe section 12 capable of being cooled by the evaporator 24, and the cooling medium pipeline 1 is provided with a switching valve which can be switched to enable cooling medium to flow through the first pipe section 11 only, or flow through the second pipe section 12 only, or flow through the first pipe section 11 and then flow through the second pipe section 12. Wherein, the first water distribution device 33 and the second water distribution device 34 may be shower pipes. In addition, the cooling channel arranged in the condenser 22 is connected between the water tank 31 and the second water distribution device 34 to realize the purpose of cooling the refrigerant in the condenser 22, which is helpful for improving the refrigeration efficiency of the compression refrigeration device 2, and simultaneously, the compression refrigeration device 2 and the evaporation cooling device 3 jointly use the water in the water tank 31 for cooling, thereby optimizing the structural design of the cooling system.
In the above technical solution, as shown in fig. 1 to 8, assuming that the evaporative cooling device 3 is operated alone when the air wet bulb temperature is a first set value (for example, 17 ℃) and the cooling medium in the cooling medium pipeline 1 can be reduced to a target temperature (for example, 20 ℃), the temperature of the cooling medium entering from the inlet a of the cooling medium pipeline 1 is a second set value (for example, 25 ℃), when the air wet bulb temperature is less than or equal to the first set value, the switching valve can be switched to enable the cooling medium to flow through only the first pipe section 11 so as to perform spray cooling through the first water distribution device 33; when the air wet bulb temperature is greater than or equal to the second set value, the evaporative cooling device 3 loses the capacity of cooling the cooling medium, and the switching valve can be switched to enable the cooling medium to flow through the second pipe section 12 only so as to be cooled through the evaporator 24; when the first set value is smaller than the air wet bulb temperature and smaller than the second set value, the evaporative cooling device 3 has certain cooling capacity but cannot cool the cooling medium to the target temperature, and the switching valve can be switched to enable the cooling medium to be sprayed and cooled through the first water distribution device 33 through the first pipe section 11 and then cooled through the evaporator 24 through the second pipe section 12, so that the cooling system can meet the cooling requirement, meanwhile, the energy consumption is smaller, and the cost is reduced.
In order to enable the switching valve to control the flow of the cooling medium through the first pipe section 11 or not through the first pipe section 11, it is preferred that the switching valve comprises a first three-way valve 41, the inlet of the first three-way valve 41 being connected to the inlet a of the cooling medium line 1, the first outlet of the first three-way valve 41 being connected to the inlet of the first pipe section 11, the cooling medium line 1 comprising a third pipe section 13 connecting the outlet of the first pipe section 11 and the second pipe section 12, the second outlet of the first three-way valve 41 being connected to the third pipe section 13 by a pipe.
In order to enable the switching valve to control the flow of cooling medium through the second pipe section 12 or not through the second pipe section 12, the switching valve preferably further comprises a second three-way valve 42, the inlet of the second three-way valve 42 being connected to the outlet of the third pipe section 13, the first outlet of the second three-way valve 42 being connected to the outlet B of the cooling medium pipe 1, the second outlet of the second three-way valve 42 being connected to the inlet of the second pipe section 12, the outlet of the second pipe section 12 being connected to the outlet B of the cooling medium pipe 1.
Among these, the structure enabling the evaporator 24 to cool the second pipe section 12 may be, but is not limited to, the following two ways:
First embodiment
As shown in fig. 1 to 4, the second pipe section 12 includes a cooling medium passage for the cooling medium to flow through provided in the evaporator 24, a first inlet pipe section 121 connected to an inlet of the cooling medium passage and an outlet of the first pipe section 11, and a first outlet pipe section 122 connected to an outlet of the cooling medium passage and an outlet B of the cooling medium pipe 1. At this time, the evaporator 24 may cool the cooling medium.
Second embodiment
As shown in fig. 5 to 8, the cooling system includes an intermediate heat exchanger R in which a coolant passage through which a coolant flows is provided in an evaporator 24, a coolant circulation circuit is formed between an outlet of the coolant passage and a primary side inlet of the intermediate heat exchanger R and between a primary side outlet of the intermediate heat exchanger R and an inlet of the coolant passage through a coolant-carrying pipe, and the second pipe section 12 includes a cooling medium passage provided in the intermediate heat exchanger R through which a cooling medium flows, a second inlet pipe section 123 connected to an inlet of the cooling medium passage and an outlet of the first pipe section 11, and a second outlet pipe section 124 connected to an outlet of the cooling medium passage and an outlet B of the cooling medium pipe 1. At this time, the evaporator 24 can indirectly cool the cooling medium, that is, the evaporator 24 cools the coolant in the coolant circulation loop first, and then the cooled coolant cools the cooling medium in the intermediate heat exchanger R, so that the problem that the cooling medium is frozen in the evaporator 24 and is inconvenient to clean is avoided.
In the second embodiment, it is further preferable that the cooling system includes a third three-way valve 5, the outlet of the coolant passage in the evaporator 24 is connected to the inlet of the third three-way valve 5, the first outlet of the third three-way valve 5 is connected to the primary side inlet of the intermediate heat exchanger R, and the second outlet of the third three-way valve 5 is connected to a pipe between the inlet of the coolant passage in the evaporator 24 and the primary side outlet of the intermediate heat exchanger R. In this way, the third three-way valve 5 can control the amount of the coolant flowing out of the outlet of the coolant channel of the evaporator 24 into the intermediate heat exchanger R and the amount of the coolant not entering the intermediate heat exchanger R, that is, the third three-way valve 5 has the function of distributing the coolant, and can play a role in flexibly adjusting the temperature of the cooling medium according to the cooling requirement.
Further, in the above two embodiments, in order to conveniently control whether the water in the water tank 31 enters the first water distribution device 33 and the cooling passage of the condenser 22, as shown in fig. 1 to 8, it is preferable that the cooling system includes a fourth three-way valve 6, a main pipe L, a first branch pipe L1 and a second branch pipe L2, the main pipe L connecting the water tank 31 and the first inlet of the fourth three-way valve 6 at the outside of the wind tunnel 32, the first branch pipe L1 connecting the first outlet of the fourth three-way valve 6 and the first water distribution device 33, and the second branch pipe L2 connecting the second outlet of the fourth three-way valve 6 and the inlet of the cooling passage of the condenser 22. In addition, the pipeline connection is simplified, and the pipeline consumption is saved.
Further, in order to allow water in the water tank 31 to smoothly enter the main pipe L so as to flow to the first water distribution device 33 and/or the cooling passage of the condenser 22, it is preferable that the main pipe L is provided with a shower pump P1. Optionally, in order to facilitate timely discharge of sewage and contaminants in the water tank 31, a drain valve F is provided on the main pipe L.
In order to replenish the amount of water lost by evaporation and the amount of water discharged by the blow-down valve F, the evaporative cooling device 3 preferably includes a water replenishment member 7 connected to the sump 31.
Moreover, as shown in fig. 1, the arrangement in the air duct 32 of the evaporative cooling device 3 is generally configured in the form of a coil, for example, an S-shaped structure, a spiral structure, etc. that is bent back and forth, so that the first water distribution device 33 can more effectively cool the cooling medium in the first pipe section 11, the first pipe section 11 is located below the first water distribution device 33, and the second water distribution device 34 is located below the first pipe section 11, so that the water with increased temperature from the condenser 22 can be prevented from being sprayed onto the first pipe section 11. In addition, in order to allow water sprayed by the first water distribution device 33 and the second water distribution device 34 to fully contact with air for heat exchange, a filler 8 is provided in the air duct 32, and the filler 8 is positioned below the first water distribution device 33 and the second water distribution device 34. Further, in order to accelerate the flow speed of air, the bottom of the air duct 32 is provided with an air inlet K and the top is provided with an air outlet, and the air outlet is provided with a fan 9.
For convenience of description of the working principle of the cooling system of the present application, it is assumed that: the annual change range of the temperature of the air wet bulb is-11.6 ℃ to 26.4 ℃; the temperature of the cooling medium entering the inlet A of the cooling medium pipeline 1 is 25 ℃, and the target temperature of the cooling medium flowing out of the outlet B of the cooling medium pipeline 1 is 20 ℃; assuming an air wet bulb temperature of 17 c, the evaporative cooling device 3 alone may be operated to lower the cooling media to the target temperature. In both the first embodiment and the second embodiment, the cooling mode of the cooling medium may be three modes:
1. Mode of operation of the evaporative cooling device only
In this operation mode, the wet bulb temperature of the air is less than or equal to 17 ℃, the compression refrigeration device 2 does not work, and the cooling medium can be reduced to the target temperature only by means of independent cooling of the evaporative cooling device 3. At this time, the cooling system of the first embodiment and the second embodiment of the present application operates in the same manner.
Specifically, as shown in fig. 2 and 6, the water in the water tank 31 is delivered to the fourth three-way valve 6 by the spray pump P1, the second outlet of the fourth three-way valve 6, which is communicated with the cooling channel of the condenser 22, is closed, the spray water is all delivered from the first outlet of the fourth three-way valve 6 to the first water distribution device 33, the first water distribution device 33 sprays the water uniformly on the first pipe section 11, a water film is formed on the surface of the first pipe section 11, indirect heat exchange is performed with the cooling medium in the first pipe section 11, the temperature of the spray water after heat exchange is increased, and drops uniformly on the filler 8 under the action of gravity to form a water film, and performs heat-moisture exchange with the air flowing through the filler 8, the temperature is reduced, and finally drops into the water tank 31, thereby forming a spray water cycle. In addition, under the action of the fan 9, air flows in the air duct 32, and the flowing air exchanges heat and humidity with spray water.
The cooling medium enters from an inlet A of the cooling medium pipeline 1 and is conveyed to the first three-way valve 41, at the moment, a first outlet of the first three-way valve 41 is opened, the cooling medium enters the first pipe section 11 to exchange heat, and the temperature is reduced; the cooled cooling medium is conveyed to the second three-way valve 42, at the moment, the first outlet of the second three-way valve 42 is opened, the second outlet is closed, and the cooling medium is conveyed to the outlet B of the cooling medium pipeline 1; under the action of the fan 9, air enters the air duct 32 from the air inlet K, exchanges heat and humidity with the filler 8 and the water film on the first pipe section 11, and is discharged outside the air duct 32. In addition, the spray water in the evaporative cooling device 3 is continuously evaporated and dissolves impurities in the air, the drain valve F may discharge a certain spray water to adjust the quality of the spray water, and the water replenishing part 7 may control the water replenishing amount according to the liquid level of the sump 31 so as to replenish the evaporated water amount and the water amount discharged by the drain valve F.
When the cooling medium temperature at the outlet B of the cooling medium line 1 is below the target temperature of 20 c, there are typically three ways of regulating: the first way is to open the second outlet of the first three-way valve 41 by a certain opening degree so that a part of the cooling medium is directly mixed with the medium cooled by the first pipe section 11 to adjust the temperature of the cooling medium flowing out from the outlet B of the cooling medium line 1; the second mode is to adjust the air quantity of the fan 9; the third way is to adjust the flow rate of the shower pump P1. These three modes can be used alone or in combination.
2. Mode of operation of compression-only refrigeration apparatus
In this operation mode, the wet bulb temperature of the air is greater than or equal to 25 ℃, and the initial temperature of the cooling medium is 25 ℃ and needs to be reduced to 20 ℃, so that the evaporative cooling device 3 loses the cooling capacity for the cooling medium, the evaporative cooling device 3 only provides cooling water for the compression refrigeration device 2, and the cooling system only depends on the compression refrigeration device 2 to cool the cooling medium to the target temperature independently. In this case, the cooling system according to the first embodiment and the second embodiment of the present application is the same as the cooling system according to the first embodiment except that the operation of cooling the cooling medium in the second pipe section 12 by the evaporator 24 is different.
Specifically, as shown in fig. 3 and 7, the compressor 21 is operated, the gaseous refrigerant is delivered from the exhaust port of the compressor 21 to the condenser 22 for heat exchange, the gaseous refrigerant is cooled and condensed to form a liquid refrigerant, the liquid refrigerant is throttled by the throttle member 23 and then enters the evaporator 24 for heat exchange, the gaseous refrigerant is formed by evaporation, and the gaseous refrigerant in the evaporator 24 is sucked into the compressor 21, thereby forming a refrigerant cycle. The water in the water tank 31 is conveyed to the fourth three-way valve 6 by the spray pump P1, the first outlet of the fourth three-way valve 6, which is communicated with the first water distribution device 33, is closed, all spray water is conveyed to a cooling channel of the condenser 22 from the second outlet of the fourth three-way valve 6, the spray water exchanges heat in the condenser 22, after the temperature rises, the spray water enters the second water distribution device 34, the second water distribution device 34 sprays the water on the filler 8 uniformly to form a water film, and the water film exchanges heat and humidity with air flowing through the filler 8, the temperature is reduced, and finally the spray water drips into the water tank 31 to form spray water circulation. In addition, under the action of the fan 9, air flows in the air duct 32, and the flowing air exchanges heat and humidity with spray water. The cooling medium is fed from the inlet a of the cooling medium pipe 1 to the first three-way valve 41, at this time, the first outlet of the first three-way valve 41 is closed, the cooling medium is all fed to the second three-way valve 42 through the second outlet of the first three-way valve 41, the first outlet of the second three-way valve 42 is closed, and the cooling medium is all fed from the second outlet of the second three-way valve 42 to the inlet of the second pipe section 12.
In the first embodiment, the evaporator 24 cools the cooling medium in the second pipe section 12 as follows: as shown in fig. 3, the cooling medium introduced into the inlet of the second pipe section 12 flows into the cooling medium passage in the evaporator 24 to exchange heat, and the cooling medium after heat exchange is sent to the outlet B of the cooling medium pipe 1. Also, in the first embodiment, when the temperature of the cooling medium flowing out from the outlet B of the cooling medium line 1 is lower than the target temperature by 20 ℃, there are generally two ways of adjusting: the first way is to open the first outlet of the second three-way valve 42 by a certain opening degree so that a part of the cooling medium does not pass through the evaporator 24; the second way is to adjust the evaporation temperature of the evaporator 24.
In the second embodiment, the evaporator 24 cools the cooling medium in the second pipe section 12 as follows: as shown in fig. 7, the coolant is delivered to the coolant channel of the evaporator 24 by the circulation pump P2, after the coolant is cooled in the evaporator 24, the coolant is delivered to the intermediate heat exchanger R through the third three-way valve 5, after the coolant exchanges heat in the intermediate heat exchanger R, the coolant is delivered to the circulation pump P2 to form a coolant circulation, the cooling medium entering the inlet of the second pipe section 12 is delivered to the intermediate heat exchanger R to exchange heat, and the cooling medium after heat exchange is delivered to the outlet B of the cooling medium pipeline 1. Also, in the second embodiment, when the temperature of the cooling medium flowing out from the outlet B of the cooling medium line 1 is lower than the target temperature by 20 ℃, there are generally three ways of adjustment: the first mode is to open the second outlet of the third three-way valve 5 by a certain opening degree so that a part of the secondary refrigerant does not pass through the intermediate heat exchanger R to adjust the temperature of the cooling medium; the second way is to adjust the temperature of the coolant at the coolant channel outlets of the evaporator 24; the third way is to adjust the flow rate of the circulation pump P2. These three modes can be used alone or in combination.
3. Mode in which the evaporative cooling device and the compression refrigeration device operate simultaneously
In this operating mode, the 17 ℃ is less than the wet bulb temperature of air is less than 25 ℃, the evaporative cooling device 3 has a certain cooling capacity, but cannot cool the cooling medium to the target temperature, so the evaporative cooling device 3 and the compression refrigeration device 2 are combined to cool the cooling medium to the target temperature. In this case, the cooling system according to the first embodiment and the second embodiment of the present application is the same as the cooling system according to the first embodiment except that the operation of cooling the cooling medium in the second pipe section 12 by the evaporator 24 is different.
Specifically, as shown in fig. 4 and 8, the water in the pool 31 is delivered to the fourth three-way valve 6 by the spray pump P1, the first outlet and the second outlet of the fourth three-way valve 6 are both opened, the fourth three-way valve 6 has the function of distributing water, and the water quantity can be distributed according to the operation condition of the cooling system, so that the first part of spray water is delivered to the first water distribution device 33 and the second part of spray water is delivered to the condenser 22, wherein the operation process of the evaporative cooling device 3 is the same as the operation mode of the evaporative cooling device 3, and the operation process of the compression refrigerating device 2 is the same as the operation mode of the compression refrigerating device 2.
The cooling medium enters from the inlet A of the cooling medium pipeline 1 and is conveyed to the first three-way valve 41, at the moment, the first outlet of the first three-way valve 41 is opened, the second outlet of the first three-way valve 41 is closed, the cooling medium firstly flows through the first pipe section 11 and is sprayed and cooled by the first water distribution device 33, after a certain temperature is reduced, the cooling medium is conveyed to the second three-way valve 42, the first outlet of the second three-way valve 42 is closed, the second outlet of the second three-way valve 42 is opened, and all the cooling medium is conveyed to the inlet of the second pipe section 12 from the second outlet of the second three-way valve 42. Thereafter, the operation of the evaporator 24 for cooling the cooling medium introduced into the second pipe section 12 in the first embodiment and the second embodiment is the same as that in the corresponding embodiment in which only the compression refrigeration apparatus is operated alone, respectively, and reference is made to the above.
A second aspect of the present invention provides a cooling apparatus comprising the cooling system described above and a device to be cooled, the cooling medium in the cooling medium line being for cooling the device to be cooled. Since the cooling device comprises a cooling system as described above, it has all or at least part of the technical effects described above in relation to the cooling system, the details and effects of more specific technical solutions being referred to above.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of individual specific technical features in any suitable way. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (6)
1. A cooling system, characterized in that it comprises a cooling medium line (1) carrying a cooling medium, and a compression refrigeration device (2) and an evaporative cooling device (3) for cooling the cooling medium; wherein:
The compression refrigeration device (2) comprises a compressor (21), a condenser (22), a throttling component (23) and an evaporator (24), wherein the compressor (21), the condenser (22), the throttling component (23) and the evaporator (24) are sequentially connected by a pipeline carrying refrigerant to form a refrigerant circulation loop;
The evaporative cooling device (3) comprises a water tank (31), an air duct (32) arranged above the water tank (31), and a first water distribution device (33) and a second water distribution device (34) arranged in the air duct (32), wherein the first water distribution device (33) is connected with the water tank (31), a cooling channel for circulating cooling water is arranged in the condenser (22), an inlet of the cooling channel is connected with the water tank (31), and an outlet of the cooling channel is connected with the second water distribution device (34);
The cooling medium pipeline (1) comprises a first pipe section (11) capable of being sprayed by the first water distribution device (33) and a second pipe section (12) capable of being cooled by the evaporator (24), and the cooling medium pipeline (1) is provided with a switching valve which can be switched to enable the cooling medium to flow through the first pipe section (11) only or flow through the second pipe section (12) only or flow through the first pipe section (11) and then flow through the second pipe section (12);
The switching valve comprises a first three-way valve (41), wherein an inlet of the first three-way valve (41) is connected with an inlet A of the cooling medium pipeline (1), a first outlet of the first three-way valve (41) is connected with an inlet of the first pipeline section (11), the cooling medium pipeline (1) comprises a third pipeline section (13) connected with an outlet of the first pipeline section (11) and the second pipeline section (12), and a second outlet of the first three-way valve (41) is connected with the third pipeline section (13) through a pipeline;
The switching valve further comprises a second three-way valve (42), wherein an inlet of the second three-way valve (42) is connected with an outlet of the third pipe section (13), a first outlet of the second three-way valve (42) is connected with an outlet B of the cooling medium pipeline (1), a second outlet of the second three-way valve (42) is connected with an inlet of the second pipe section (12), and an outlet of the second pipe section (12) is connected with an outlet B of the cooling medium pipeline (1);
The second pipe section (12) comprises a cooling medium channel arranged in the evaporator (24) and used for the cooling medium to flow through, a first inlet pipe section (121) connected with an inlet of the cooling medium channel and an outlet of the first pipe section (11), and a first outlet pipe section (122) connected with an outlet of the cooling medium channel and an outlet B of the cooling medium pipeline (1);
The cooling system further includes:
a fourth three-way valve (6);
a main pipeline L, which is connected with the water tank (31) and the first inlet of the fourth three-way valve (6) outside the air duct (32);
the first branch pipeline L1 is connected with a first outlet of the fourth three-way valve (6) and the first water distribution device (33); and
-A second branch line L2, said second branch line L2 connecting a second outlet of said fourth three-way valve (6) and an inlet of said cooling channel of said condenser (22).
2. A cooling system according to claim 1, characterized in that it comprises an intermediate heat exchanger R, in which a coolant channel for coolant to flow through is provided in the evaporator (24), a coolant circulation circuit being formed between the outlet of the coolant channel and the primary side inlet of the intermediate heat exchanger R and between the primary side outlet of the intermediate heat exchanger R and the inlet of the coolant channel by means of coolant-carrying pipes, the second pipe section (12) comprising a cooling medium channel provided in the intermediate heat exchanger R for the flow of cooling medium therethrough, a second inlet pipe section (123) connected to the inlet of the cooling medium channel and to the outlet of the first pipe section (11), and a second outlet pipe section (124) connected to the outlet of the cooling medium channel and to the outlet B of the cooling medium pipe (1).
3. A cooling system according to claim 2, characterized in that it comprises a third three-way valve (5), the outlet of the coolant channel in the evaporator (24) being connected to the inlet of the third three-way valve (5), the first outlet of the third three-way valve (5) is connected with the primary side inlet of the intermediate heat exchanger R, and the second outlet of the third three-way valve (5) is connected with a pipeline between the inlet of the secondary refrigerant channel in the evaporator (24) and the primary side outlet of the intermediate heat exchanger R.
4. A cooling system according to claim 3, characterized in that the main line L is provided with a spray pump P1 and/or a blow-down valve F.
5. The cooling system according to any one of claims 1-4, wherein:
The evaporative cooling device (3) comprises a water supplementing component (7) connected with the water tank (31) and used for supplementing water to the water tank (31); and/or the number of the groups of groups,
The first pipe section (11) is positioned below the first water distribution device (33), and the second water distribution device (34) is positioned below the first pipe section (11); and/or the number of the groups of groups,
A filler (8) is arranged in the air duct (32), and the filler (8) is positioned below the first water distribution device (33) and the second water distribution device (34); and/or the number of the groups of groups,
The bottom of dryer (32) is provided with air intake K and top is provided with the air outlet, air outlet department installs fan (9).
6. A cooling device, characterized in that it comprises a cooling system according to any one of claims 1-5 and a device to be cooled, the cooling medium in the cooling medium line being used for cooling the device to be cooled.
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| CN201811133774.6A CN109269133B (en) | 2018-09-27 | 2018-09-27 | Cooling system and cooling device |
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| FR3122248B1 (en) * | 2021-03-15 | 2025-04-18 | Pierre Bignon | Thermal machine with compressor powered by a manometric column |
| CN114698345A (en) * | 2022-04-11 | 2022-07-01 | 湖南创化低碳环保科技有限公司 | A jet cooling system for chips and photovoltaic panels |
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