CN113154721A - Novel energy-saving water chilling unit - Google Patents
Novel energy-saving water chilling unit Download PDFInfo
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- CN113154721A CN113154721A CN202110420894.XA CN202110420894A CN113154721A CN 113154721 A CN113154721 A CN 113154721A CN 202110420894 A CN202110420894 A CN 202110420894A CN 113154721 A CN113154721 A CN 113154721A
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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
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
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Abstract
The invention discloses a novel energy-saving water chilling unit which comprises a vapor compression refrigeration circulation pipeline, a gravity heat pipe circulation pipeline and a cooling water circulation pipeline, wherein a refrigeration working medium flows through the vapor compression refrigeration circulation pipeline, a heat pipe medium flows through the gravity heat pipe circulation pipeline, cooling water flows through the cooling water circulation pipeline, the vapor compression refrigeration circulation pipeline is connected with the gravity heat pipe circulation pipeline through a first condenser, the vapor compression refrigeration circulation pipeline is connected with the cooling water circulation pipeline through a second condenser, the gravity heat pipe circulation pipeline is connected with the cooling water circulation pipeline through an evaporative cooling tower, and the vapor compression refrigeration circulation pipeline is connected with an external freezing water pipeline for circulating freezing water through an evaporator. The invention couples the gravity heat pipe circulation pipeline without consuming electric energy on the basis of the steam compression refrigeration circulation pipeline and the cooling water circulation pipeline which form the common water-cooled water chilling unit, fully utilizes the natural cold source and realizes the energy efficiency improvement of the unit.
Description
Technical Field
The invention relates to the technical field of water chilling units, in particular to a novel energy-saving water chilling unit.
Background
At present, the energy structure of China is mainly coal burning, and a large amount of energy consumption brings serious environmental pollution and greenhouse gas emission. The total energy consumption of buildings in China exceeds 8 hundred million tons of standard coal, occupies about 20 percent of the total energy consumption of the whole country, and continuously increases at a high speed along with the economic development of China. The heating, ventilating and air conditioning system is the largest energy-using system in the building, and the energy consumption of the heating, ventilating and air conditioning system accounts for about 40% of the energy consumption of the whole building. The water chilling unit is the energy utilization equipment with the largest energy consumption of the heating ventilation air conditioning system, and the reduction of the operation energy consumption of the water chilling unit has important significance for energy conservation, emission reduction and green development.
Disclosure of Invention
The invention aims to provide a novel energy-saving water chilling unit, which can realize the energy efficiency improvement of a vapor compression refrigeration circulation pipeline by adopting an evaporative cooling tower, and meanwhile, a gravity heat pipe circulation pipeline which does not need to consume electric energy is coupled on the basis of the vapor compression refrigeration circulation pipeline and a cooling water circulation pipeline which form a common water-cooled water chilling unit, so that a natural cold source is fully utilized, the running time and the running lift of a cooling water pump in the cooling water circulation pipeline are greatly reduced, the energy efficiency improvement of the cooling water circulation pipeline is realized, and the problem of large energy consumption of the water chilling unit in the prior art is solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a novel energy-conserving cooling water set, cooling water set comprises vapor compression refrigeration cycle pipeline, gravity heat pipe circulation pipeline and cooling water circulation pipeline, vapor compression refrigeration cycle pipeline circulation has the refrigerant, gravity heat pipe circulation pipeline circulation has the heat pipe medium, cooling water circulation pipeline circulation has the cooling water, vapor compression refrigeration cycle pipeline through first condenser with gravity heat pipe circulation pipeline is connected, vapor compression refrigeration cycle pipeline through the second condenser with cooling water circulation pipeline is connected, gravity heat pipe circulation pipeline through the evaporation formula cooling tower with cooling water circulation pipeline is connected, vapor compression refrigeration cycle pipeline is connected with the outside refrigerated water pipeline that is used for circulating the refrigerated water through the evaporimeter.
Further, the first condenser is provided with a first channel serving as a part of the vapor compression refrigeration circulation pipeline and a second channel serving as a part of the gravity heat pipe circulation pipeline, the second condenser is provided with a third channel serving as a part of the vapor compression refrigeration circulation pipeline and a fourth channel serving as a part of the cooling water circulation pipeline, the evaporator is provided with a fifth channel serving as a part of the vapor compression refrigeration circulation pipeline and a sixth channel serving as a part of the chilled water pipeline, and the evaporative cooling tower is provided with a seventh channel serving as a part of the gravity heat pipe circulation pipeline and an eighth channel serving as a part of the cooling water circulation pipeline.
Further, the vapor compression refrigeration cycle pipeline comprises a compressor, a first valve, a first channel of a first condenser, a third channel of a second condenser, a liquid storage tank, a throttling device, a fifth channel of an evaporator and a second valve, wherein the compressor, the first valve, the first channel of the first condenser, the third channel of the second condenser, the liquid storage tank, the throttling device and the fifth channel of the evaporator are sequentially connected through a pipeline, one end of the second valve is connected with a pipeline between the compressor and the first valve, and the other end of the second valve is connected with a pipeline between the first channel of the first condenser and the third channel of the second condenser. Therefore, the high-temperature and high-pressure steam formed by compression by the compressor can selectively flow into the second condenser through the first condenser or directly flow into the second condenser.
Further, the gravity heat pipe circulation pipeline comprises a second channel of the first condenser and a seventh channel of the evaporative cooling tower, and the second channel of the first condenser and the seventh channel of the evaporative cooling tower are connected through a pipeline to form the gravity heat pipe circulation pipeline. The heat pipe medium in the gravity heat pipe circulating pipeline exchanges heat with high-temperature and high-pressure steam formed by compression of the compressor at the first condenser, and the heat pipe medium in the gravity heat pipe circulating pipeline after heat exchange is cooled and condensed by a natural cold source in the evaporative cooling tower and flows back to the first condenser to be gasified again under the action of gravity.
Further, the cooling water circulation pipeline comprises a fourth channel of the second condenser, a cooling water pump, an eighth channel of the evaporative cooling tower, a third valve and a fourth valve, the fourth channel of the second condenser, the cooling water pump, the eighth channel of the evaporative cooling tower and the third valve are sequentially connected through a pipeline, one end of the fourth valve is connected with a pipeline between the eighth channel of the evaporative cooling tower and the third valve, and the other end of the fourth valve is connected with a pipeline between the fourth channel of the second condenser and the cooling water pump. Therefore, the cooling water in the evaporative cooling tower after heat exchange with the heat pipe medium can be directly pumped back to the evaporative cooling tower by the cooling water pump through the fourth valve for continuous heat exchange; or the refrigerant enters the second condenser through the third valve to further exchange heat with the refrigerant in the vapor compression refrigeration circulation pipeline, and then is pumped back to the evaporative cooling tower by the cooling water pump to continue exchanging heat.
Preferably, the first condenser is a shell-and-tube heat exchanger, the first channel is located on the shell side of the first condenser, the second channel is located in a tube of the first condenser, and the flow direction of the refrigerant in the first channel is opposite to the flow direction of the heat pipe medium in the second channel, so that the heat exchange efficiency is better.
Preferably, the second condenser is a shell-and-tube heat exchanger, the third channel is located on the shell side of the second condenser, the fourth channel is located in a tube of the second condenser, and the flow direction of the refrigerant in the third channel is opposite to the flow direction of the cooling water in the fourth channel, so that the heat exchange efficiency is better.
Preferably, the evaporator is a shell-and-tube heat exchanger, the fifth channel is located on the shell side of the evaporator, the sixth channel is located in a tube of the evaporator, and the flow direction of the refrigerant in the fifth channel is opposite to the flow direction of the chilled water in the sixth channel, so that the heat exchange efficiency is better.
Further, the evaporative cooling tower is further provided with a fan, and the eighth channel comprises a spray pipe for spraying water to cool towards the seventh channel and a return pipe for collecting water. Through setting up the fan, can accelerate the heat dissipation of the heat pipe medium in the gravity heat pipe circulation pipeline and the cooling water in the cooling water circulation pipeline, improve heat exchange efficiency.
Preferably, the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the sixth channel and the seventh channel are all tubes distributed in a serpentine shape, so that the heat exchange efficiency is better.
Compared with the prior art, the invention provides a novel energy-saving water chilling unit, which has the following beneficial effects:
1. compared with a common water-cooled water chilling unit, the evaporative cooling tower has the advantages that the condensation temperature of the vapor compression refrigeration circulation pipeline is reduced, the energy consumption of a compressor in the vapor compression refrigeration circulation pipeline is greatly reduced, and the overall energy efficiency is improved.
2. The heat pipe medium in the gravity heat pipe circulation pipeline flows back to the first condenser from the evaporative cooling tower under the action of gravity and is gasified again, and the circulation is repeated without consuming electric energy.
3. The gravity heat pipe circulating pipeline is coupled on the basis of the steam compression refrigeration circulating pipeline and the cooling water circulating pipeline which form a common water-cooled water chilling unit, so that the running time and the running lift of a cooling water pump in the cooling water circulating pipeline are greatly reduced while a natural cold source is fully utilized, the running energy consumption of the cooling water pump is greatly reduced, and the overall energy efficiency is further improved.
4. The energy efficiency of the vapor compression refrigeration circulation pipeline and the cooling water circulation pipeline is improved, meanwhile, the gravity heat pipe circulation pipeline does not need to consume electric energy in operation, and the water chilling unit formed by the three pipelines has a remarkable integral energy-saving effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 shows the ON status of each device in different modes;
FIG. 3 is a schematic diagram of the operation of the present invention in a dry cooling mode;
FIG. 4 is a schematic view of the operation of the present invention in evaporative cooling mode;
FIG. 5 is a schematic representation of the operation of the present invention in the combined mode;
fig. 6 is a schematic view of the operation of the present invention in a water cooling mode.
Reference numerals: 1. a compressor; 2. a first condenser; 21. a first channel; 22. a second channel; 3. a second condenser; 31. a third channel; 32. a fourth channel; 4. a liquid storage tank; 5. a throttling device; 6. an evaporator; 61. a fifth channel; 62. a sixth channel; 7. an evaporative cooling tower; 71. a seventh channel; 72. an eighth channel; 8. a cooling water pump; 9. a fan; 10. a chilled water line; a. a first valve; b. a second valve; c. a third valve; d. and a fourth valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely in the following detailed description of embodiments thereof, which is to be understood as being illustrative only and not restrictive in all respects. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 6, the present embodiment provides a novel energy-saving water chiller, which comprises a vapor compression refrigeration circulation pipeline, a gravity assisted heat pipe circulation pipeline and a cooling water circulation pipeline, the vapor compression refrigeration circulation pipeline is communicated with a refrigeration working medium, the gravity heat pipe circulation pipeline is communicated with a heat pipe medium, the cooling water circulation pipeline is communicated with cooling water, the vapor compression refrigeration circulation pipeline is connected with the gravity heat pipe circulation pipeline through a first condenser 2, the vapor compression refrigeration circulating pipeline is connected with the cooling water circulating pipeline through a second condenser 3, the gravity heat pipe circulation pipeline is connected with the cooling water circulation pipeline through an evaporative cooling tower 7, the vapor compression refrigeration cycle pipeline is connected with a chilled water pipeline 10 for circulating chilled water outside through the evaporator 6. By adopting the evaporative cooling tower 7, the energy efficiency of the vapor compression refrigeration circulation pipeline is improved, meanwhile, the gravity heat pipe circulation pipeline which does not need to consume electric energy is coupled on the basis of the vapor compression refrigeration circulation pipeline and the cooling water circulation pipeline which form the common water-cooled water chilling unit, the natural cold source is fully utilized, the running time and the running lift of the cooling water pump 8 in the cooling water circulation pipeline are greatly reduced, and the energy efficiency improvement of the cooling water circulation pipeline is realized.
Wherein the first condenser 2 is provided with a first passage 21 as a part of the vapor compression refrigeration cycle line and a second passage 22 as a part of the gravity heat pipe cycle line. The second condenser 3 is provided with a third passage 31 as a part of the vapor compression refrigeration cycle circuit and a fourth passage 32 as a part of the cooling water cycle circuit. The evaporator 6 is provided with a fifth passage 61 as a part of the vapor compression refrigeration cycle line and a sixth passage 62 as a part of the chilled water line 10. The evaporative cooling tower 7 is provided with a seventh channel 71 as a part of the gravity assisted heat pipe circulation line and an eighth channel 72 as a part of the cooling water circulation line.
Specifically, the vapor compression refrigeration cycle pipeline includes a compressor 1, a first valve a, a first passage 21 of a first condenser 2, a third passage 31 of a second condenser 3, a liquid storage tank 4, a throttling device 5, a fifth passage 61 of an evaporator 6, and a second valve b, wherein the compressor 1, the first valve a, the first passage 21 of the first condenser 2, the third passage 31 of the second condenser 3, the liquid storage tank 4, the throttling device 5, and the fifth passage 61 of the evaporator 6 are sequentially connected through a pipeline, one end of the second valve b is connected to a pipeline between the compressor 1 and the first valve a, and the other end of the second valve b is connected to a pipeline between the first passage 21 of the first condenser 2 and the third passage 31 of the second condenser 3. In this way, the high-temperature and high-pressure steam compressed by the compressor 1 may selectively flow into the second condenser 3 through the first condenser 2 or directly flow into the second condenser 3.
The gravity heat pipe circulation pipeline comprises a second channel 22 of the first condenser 2 and a seventh channel 71 of the evaporative cooling tower 7, and the second channel 22 of the first condenser 2 and the seventh channel 71 of the evaporative cooling tower 7 are connected through a pipeline to form the gravity heat pipe circulation pipeline. The heat pipe medium in the gravity heat pipe circulation pipeline exchanges heat with high-temperature and high-pressure steam formed by compression of the compressor 1 at the first condenser 2, and the heat pipe medium in the gravity heat pipe circulation pipeline after heat exchange is cooled and condensed by utilizing a natural cold source in the evaporative cooling tower 7 and flows back to the first condenser 2 to be gasified again under the action of gravity.
The cooling water circulation pipeline comprises a fourth channel 32 of the second condenser 3, a cooling water pump 8, an eighth channel 72 of the evaporative cooling tower 7, a third valve c and a fourth valve d, the fourth channel 32 of the second condenser 3, the cooling water pump 8, the eighth channel 72 of the evaporative cooling tower 7 and the third valve c are sequentially connected through a pipeline, one end of the fourth valve d is connected with a pipeline between the eighth channel 72 of the evaporative cooling tower 7 and the third valve c, and the other end of the fourth valve d is connected with a pipeline between the fourth channel 32 of the second condenser 3 and the cooling water pump 8. Therefore, the cooling water in the evaporative cooling tower 7 after heat exchange with the heat pipe medium can be directly pumped back to the evaporative cooling tower 7 by the cooling water pump 8 through the fourth valve d for continuous heat exchange; or the refrigerant enters the second condenser 3 through the third valve c to exchange heat with the refrigerant in the vapor compression refrigeration circulation pipeline, and then is pumped back to the evaporative cooling tower 7 by the cooling water pump 8 to exchange heat continuously.
In some specific embodiments, the first condenser 2 is a shell-and-tube heat exchanger, the first channel 21 is located on the shell side of the first condenser 2, the second channel 22 is located inside the tube of the first condenser 2, and the flow direction of the refrigerant in the first channel 21 is opposite to the flow direction of the heat pipe medium in the second channel 22, so that the heat exchange efficiency is better.
In some specific embodiments, the second condenser 3 is a shell-and-tube heat exchanger, the third channel 31 is located on the shell side of the second condenser 3, the fourth channel 32 is located in the tube of the second condenser 3, and the flow direction of the refrigerant in the third channel 31 is opposite to the flow direction of the cooling water in the fourth channel 32, so that the heat exchange efficiency is better.
In some specific embodiments, the evaporator 6 is a shell-and-tube heat exchanger, the fifth channel 61 is located on the shell side of the evaporator 6, the sixth channel 62 is located in the tube of the evaporator 6, and the flow direction of the refrigerant in the fifth channel 61 is opposite to the flow direction of the frozen water in the sixth channel 62, so that the heat exchange efficiency is better.
In some specific embodiments, the evaporative cooling tower 7 is further provided with a fan 9, and the eighth channel 72 comprises a spray pipe for spraying water to cool toward the seventh channel 71 and a return pipe for collecting water. Through setting up fan 9, can accelerate the heat dissipation of the heat pipe medium in the gravity heat pipe circulation pipeline and the cooling water in the cooling water circulation pipeline, improve heat exchange efficiency.
In some specific embodiments, in order to have better heat exchange efficiency, the first channel 21, the second channel 22, the third channel 31, the fourth channel 32, the fifth channel 61, the sixth channel 62 and the seventh channel 71 are preferably arranged as a pipe with a serpentine distribution.
It should be noted that, in order to facilitate observation and adjustment, the novel energy-saving water chilling unit is further provided with components such as an instrument panel and a controller to monitor and adjust the operation state of each device in the working process. The instrument panel can be provided with parameter control and display of temperature, humidity, outlet air temperature (temperature of damp and hot air), power indication, operation of the compressor 1, operation of the throttling device 5, operation of the cooling water pump 8, operation of the fan 9, operation of the first valve a, operation of the second valve b, operation of the third valve c, operation of the fourth valve d and the like.
Referring to fig. 2 to 6, the energy-saving water chilling unit of the present application can realize four operation modes, i.e., a dry cooling mode, an evaporation cooling mode, a combined mode and a water cooling mode, by opening or closing the first valve a, the second valve b, the third valve c, the fourth valve d and the cooling water pump 8. The four operation modes will be described in detail below, wherein the direction indicated by the thin straight line arrow is the flow direction of the refrigerant in the vapor compression refrigeration cycle pipeline, the direction indicated by the solid arrow is the flow direction of the heat pipe medium in the gravity heat pipe cycle pipeline, the direction indicated by the thin dashed arrow is the flow direction of the cooling water in the cooling water cycle pipeline, and the direction indicated by the hollow arrow is the flow direction of the chilled water in the chilled water pipeline 10.
(1) Dry cooling mode: referring to fig. 3, when the air temperature is low, the cooling water pump 8 is turned off, the blower 9 is turned on, the first valve a is opened, the second valve b, the third valve c and the fourth valve d are closed, and the compressor 1 and the throttling device 5 are operated. A compressor 1 in a vapor compression refrigeration cycle pipeline compresses low-temperature and low-pressure refrigerant vapor into high-temperature and high-pressure vapor, the high-temperature and high-pressure vapor is condensed into high-pressure liquid in a first condenser 2, the high-pressure refrigerant liquid from the first condenser 2 flows into a throttling device 5 through a second condenser 3 and a liquid storage tank 4 in sequence, the high-pressure refrigerant liquid enters an evaporator 6 after being throttled by the throttling device 5 to form a gas-liquid mixture, the gas-liquid mixture in the evaporator 6 absorbs heat of frozen water in a frozen water pipeline 10 to become low-pressure refrigerant gas, and the low-pressure refrigerant gas enters the compressor 1 to be compressed. Liquid heat pipe medium in the gravity heat pipe circulation pipeline absorbs heat released by high-temperature and high-pressure steam phase change condensation in the first condenser 2 to be gasified, the gasified gaseous heat pipe medium transfers the phase change condensation heat to the external environment in the evaporative cooling tower 7 under the action of the fan 9, and the condensed liquid heat pipe medium flows back to the first condenser 2 from the evaporative cooling tower 7 under the action of gravity and is gasified again. In this mode, the vapor compression refrigeration cycle pipeline and the gravity heat pipe cycle pipeline are operated in a combined manner, so that the preparation of low-temperature chilled water is realized.
(2) Evaporation cold mode: referring to fig. 4, when the air temperature is low, the cooling water pump 8 and the fan 9 are turned on, the first valve a and the fourth valve d are turned on, the second valve b and the third valve c are turned off, and the compressor 1 and the throttle device 5 are operated. A compressor 1 in a vapor compression refrigeration cycle pipeline compresses low-temperature and low-pressure refrigerant vapor into high-temperature and high-pressure vapor, the high-temperature and high-pressure vapor is condensed into high-pressure liquid in a first condenser 2, the high-pressure refrigerant liquid from the first condenser 2 flows into a throttling device 5 through a second condenser 3 and a liquid storage tank 4 in sequence, the high-pressure refrigerant liquid enters an evaporator 6 after being throttled by the throttling device 5 to form a gas-liquid mixture, the gas-liquid mixture in the evaporator 6 absorbs heat of frozen water in a frozen water pipeline 10 to become low-pressure refrigerant gas, and the low-pressure refrigerant gas enters the compressor 1 to be compressed. Liquid heat pipe medium in the gravity heat pipe circulation pipeline absorbs heat released by high-temperature and high-pressure steam phase change condensation in the first condenser 2 to be gasified, the gasified gaseous heat pipe medium transfers the phase change condensation heat to the external environment in the evaporative cooling tower 7 under the combined action of the fan 9 and the cooling water pump 8, and the condensed liquid heat pipe medium flows back to the first condenser 2 from the evaporative cooling tower 7 under the action of gravity and is gasified again. In this mode, the vapor compression refrigeration circulation pipeline, the gravity heat pipe circulation pipeline and the cooling water circulation pipeline are operated in a combined manner, so that the preparation of low-temperature chilled water is realized.
(3) A combined mode: referring to fig. 5, when the temperature is high, the cooling water pump 8 and the fan 9 are turned on, the first valve a and the third valve c are turned on, the second valve b and the fourth valve d are turned off, and the compressor 1 and the throttling device 5 are operated. A compressor 1 in a vapor compression refrigeration cycle pipeline compresses low-temperature and low-pressure refrigerant vapor into high-temperature and high-pressure vapor, part of the high-temperature and high-pressure vapor is condensed into high-pressure liquid in a first condenser 2, a refrigerant gas-liquid mixture from the first condenser 2 flows into a second condenser 3 to be condensed into high-pressure liquid, the high-pressure refrigerant liquid from the second condenser 3 flows into a throttling device 5 through a liquid storage tank 4, the high-pressure refrigerant liquid enters an evaporator 6 after being throttled by the throttling device 5 to form a gas-liquid mixture, the gas-liquid mixture in the evaporator 6 absorbs heat of frozen water in a frozen water pipeline 10 to become low-pressure refrigerant gas, and the low-pressure refrigerant gas enters the compressor 1 to be compressed. Liquid heat pipe medium in the gravity heat pipe circulation pipeline absorbs heat released by high-temperature and high-pressure steam phase change condensation in the first condenser 2 to be gasified, the gasified gaseous heat pipe medium transfers the phase change condensation heat to the external environment in the evaporative cooling tower 7 under the combined action of the fan 9 and the cooling water pump 8, and the condensed liquid heat pipe medium flows back to the first condenser 2 from the evaporative cooling tower 7 under the action of gravity and is gasified again. The cooling water in the cooling water circulation pipeline absorbs heat released by high-temperature and high-pressure steam phase-change condensation in the second condenser 3, the heat-absorbing and temperature-rising cooling water transfers the heat to the external environment in the evaporative cooling tower 7 under the combined action of the fan 9 and the cooling water pump 8, and the temperature-reducing cooling water is conveyed to the second condenser 3 from the evaporative cooling tower 7 under the action of the cooling water pump 8. In this mode, the vapor compression refrigeration circulation pipeline, the gravity heat pipe circulation pipeline and the cooling water circulation pipeline are operated in a combined manner, so that the preparation of low-temperature chilled water is realized.
(4) A water cooling mode: referring to fig. 6, when the air temperature is high, the cooling water pump 8 and the fan 9 are turned on, the second valve b and the third valve c are turned on, the first valve a and the fourth valve d are turned off, and the compressor 1 and the throttling device 5 are operated. A compressor 1 in a vapor compression refrigeration cycle pipeline compresses low-temperature and low-pressure refrigerant vapor into high-temperature and high-pressure vapor, the high-temperature and high-pressure vapor is directly condensed into high-pressure liquid in a second condenser 3 after passing through a second valve b, the high-pressure refrigerant liquid flowing out of the second condenser 3 sequentially flows into a throttling device 5 through a liquid storage tank 4, the high-pressure refrigerant liquid enters an evaporator 6 after being throttled by the throttling device 5 to form a gas-liquid mixture, the gas-liquid mixture in the evaporator 6 absorbs heat of frozen water in a frozen water pipeline 10 to become low-pressure refrigerant gas, and the low-pressure refrigerant gas enters the compressor 1 to be compressed. The cooling water in the cooling water circulation pipeline absorbs heat released by high-temperature and high-pressure steam phase-change condensation in the second condenser 3, the heat-absorbing and temperature-rising cooling water transfers the heat to the external environment in the evaporative cooling tower 7 under the combined action of the fan 9 and the cooling water pump 8, and the temperature-reducing cooling water is conveyed to the second condenser 3 from the evaporative cooling tower 7 under the action of the cooling water pump 8. In this mode, the vapor compression refrigeration cycle pipeline and the cooling water cycle pipeline are operated in a combined manner, so that the preparation of low-temperature chilled water is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a novel energy-conserving cooling water set which characterized in that: the water chilling unit comprises a vapor compression refrigeration circulation pipeline, a gravity heat pipe circulation pipeline and a cooling water circulation pipeline, wherein a refrigeration working medium flows through the vapor compression refrigeration circulation pipeline, a heat pipe medium flows through the gravity heat pipe circulation pipeline, cooling water flows through the cooling water circulation pipeline, the vapor compression refrigeration circulation pipeline is connected with the gravity heat pipe circulation pipeline through a first condenser, the vapor compression refrigeration circulation pipeline is connected with the cooling water circulation pipeline through a second condenser, the gravity heat pipe circulation pipeline is connected with the cooling water circulation pipeline through an evaporative cooling tower, and the vapor compression refrigeration circulation pipeline is connected with an external freezing water pipeline for flowing freezing water through an evaporator.
2. The novel energy-saving water chilling unit according to claim 1, characterized in that: the first condenser is provided with a first channel serving as a part of the vapor compression refrigeration circulation pipeline and a second channel serving as a part of the gravity heat pipe circulation pipeline, the second condenser is provided with a third channel serving as a part of the vapor compression refrigeration circulation pipeline and a fourth channel serving as a part of the cooling water circulation pipeline, the evaporator is provided with a fifth channel serving as a part of the vapor compression refrigeration circulation pipeline and a sixth channel serving as a part of the chilled water pipeline, and the evaporative cooling tower is provided with a seventh channel serving as a part of the gravity heat pipe circulation pipeline and an eighth channel serving as a part of the cooling water circulation pipeline.
3. The novel energy-saving water chilling unit according to claim 2, characterized in that: the vapor compression refrigeration cycle pipeline comprises a compressor, a first valve, a first channel of a first condenser, a third channel of a second condenser, a liquid storage tank, a throttling device, a fifth channel of an evaporator and a second valve, wherein the compressor, the first valve, the first channel of the first condenser, the third channel of the second condenser, the liquid storage tank, the throttling device and the fifth channel of the evaporator are sequentially connected through pipelines, one end of the second valve is connected with a pipeline between the compressor and the first valve, and the other end of the second valve is connected with a pipeline between the first channel of the first condenser and the third channel of the second condenser.
4. The novel energy-saving water chilling unit according to claim 2, characterized in that: the gravity heat pipe circulation pipeline comprises a second channel of the first condenser and a seventh channel of the evaporative cooling tower, and the second channel of the first condenser and the seventh channel of the evaporative cooling tower are connected through a pipeline to form the gravity heat pipe circulation pipeline.
5. The novel energy-saving water chilling unit according to claim 2, characterized in that: the cooling water circulation pipeline comprises a fourth channel of a second condenser, a cooling water pump, an eighth channel of an evaporative cooling tower, a third valve and a fourth valve, the fourth channel of the second condenser, the cooling water pump, the eighth channel of the evaporative cooling tower and the third valve are sequentially connected through pipelines, one end of the fourth valve is connected with a pipeline between the eighth channel of the evaporative cooling tower and the third valve, and the other end of the fourth valve is connected with a pipeline between the fourth channel of the second condenser and the cooling water pump.
6. The novel energy-saving water chilling unit according to claim 2, characterized in that: the first condenser is a shell-and-tube heat exchanger, the first channel is positioned on the shell side of the first condenser, the second channel is positioned in a tube of the first condenser, and the flow direction of the refrigerant in the first channel is opposite to the flow direction of the heat pipe medium in the second channel.
7. The novel energy-saving water chilling unit according to claim 2, characterized in that: the second condenser is a shell-and-tube heat exchanger, the third channel is positioned on the shell side of the second condenser, the fourth channel is positioned in a tube of the second condenser, and the flow direction of the refrigerant in the third channel is opposite to the flow direction of the cooling water in the fourth channel.
8. The novel energy-saving water chilling unit according to claim 2, characterized in that: the evaporator is a shell-and-tube heat exchanger, the fifth channel is positioned on the shell side of the evaporator, the sixth channel is positioned in a tube of the evaporator, and the flow direction of the refrigerant in the fifth channel is opposite to the flow direction of the chilled water in the sixth channel.
9. The novel energy-saving water chilling unit according to claim 2, characterized in that: the evaporative cooling tower is further provided with a fan, and the eighth channel comprises a spray pipe for spraying water to cool towards the seventh channel and a return pipe for collecting water.
10. The novel energy-saving water chilling unit according to claim 2, characterized in that: the first channel, the second channel, the third channel, the fourth channel, the fifth channel, the sixth channel and the seventh channel are all snakelike distributed pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420894.XA CN113154721A (en) | 2021-04-19 | 2021-04-19 | Novel energy-saving water chilling unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110420894.XA CN113154721A (en) | 2021-04-19 | 2021-04-19 | Novel energy-saving water chilling unit |
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| CN113154721A true CN113154721A (en) | 2021-07-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234496A (en) * | 2021-12-23 | 2022-03-25 | 恩德特机械（苏州）有限公司 | Energy-saving industrial cold and hot integrated water chilling unit |
| CN115235052A (en) * | 2022-07-27 | 2022-10-25 | 广州市铭汉科技股份有限公司 | Automatic adjusting control system of water chiller |
-
2021
- 2021-04-19 CN CN202110420894.XA patent/CN113154721A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234496A (en) * | 2021-12-23 | 2022-03-25 | 恩德特机械（苏州）有限公司 | Energy-saving industrial cold and hot integrated water chilling unit |
| CN115235052A (en) * | 2022-07-27 | 2022-10-25 | 广州市铭汉科技股份有限公司 | Automatic adjusting control system of water chiller |
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