CN111928523A - CO (carbon monoxide)2Transcritical cold and heat comprehensive utilization system - Google Patents
CO (carbon monoxide)2Transcritical cold and heat comprehensive utilization system Download PDFInfo
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 title claims description 4
- 239000007788 liquid Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 76
- 239000007921 spray Substances 0.000 claims description 37
- 238000011084 recovery Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract description 27
- 238000005057 refrigeration Methods 0.000 abstract description 15
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 62
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000003860 storage Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides CO2Transcritical cold and heat comprehensive utilization system includes: the system comprises a low-temperature variable-frequency compressor, a desuperheater, a medium-temperature variable-frequency compressor, a parallel variable-frequency compressor, an oil separator, a gas cooler, a gas heat exchanger, a medium-temperature liquid reservoir, a medium-temperature evaporator, a low-temperature evaporator, a medium-temperature heat regenerator and a low-temperature heat regenerator; the whole set of refrigeration system adopts the integrated design of three evaporation sections of low temperature, medium temperature and parallel compression, comprehensively considers the load, and reasonably configures a low-temperature compressor and a medium-temperature compressor. The low-temperature refrigeration load is compressed by two stages of the low-temperature compressor and the medium-temperature compressor, the compression ratio of a single machine head is reduced, the power consumption of compression is reduced, and CO is solved2The reliability and the efficiency of the refrigerant under the condition of medium-low temperature coexistence are improved, and the feasibility and the stability of system operation in hot seasons are particularly improved.
Description
Technical Field
The invention relates to the technical field of commercial refrigeration equipment, in particular to a refrigeration and heating system for supermarkets and refrigeration houses.
Background
CO of the prior art2The high exhaust pressure and temperature at the low temperature section result in overhigh suction pressure and discharge pressure, suction temperature and exhaust temperature at the medium temperature section, low energy efficiency and poor safety, and an additional set of refrigeration system is needed to be added for reducing the outlet temperature of the high-pressure section air cooler for CO2Carry out machineryThe supercooling circulation causes the system to be complex, increases the energy consumption and is not environment-friendly; the method has the defects in the aspect of ensuring the stable operation of the compressor, and no effective measure for preventing the liquid return of the compressor is designed; effective supercooling is not considered before throttling and depressurizing at a high-pressure section, so that the pressure difference is overlarge, and the energy consumption is increased; the design of utilizing the compressor to discharge heat and heat hot water cannot accurately control the outlet water temperature, so that the hot water temperature is not constant, and the running stability and COP value of the system are lower.
Disclosure of Invention
In accordance with the technical problems set forth above, there is provided a CO2The trans-critical cold-heat comprehensive utilization system solves the problem of CO2The refrigerant is used for improving the reliability and efficiency under the condition of medium-low temperature coexistence, particularly the feasibility and stability of system operation in hot seasons, and waste heat is used for heating hot water, so that the comprehensive utilization of energy is realized, and the energy efficiency of the whole system is further improved.
The technical means adopted by the invention are as follows:
CO (carbon monoxide)2Transcritical cold and heat comprehensive utilization system includes:
the system comprises a low-temperature variable-frequency compressor, a desuperheater, a medium-temperature variable-frequency compressor, a parallel variable-frequency compressor, an oil separator, a gas cooler, a gas heat exchanger, a medium-temperature liquid reservoir, a medium-temperature evaporator, a low-temperature evaporator, a medium-temperature heat regenerator and a low-temperature heat regenerator;
the low-temperature evaporator is connected with the low-temperature heat regenerator and then connected with an air suction pipeline of the low-temperature variable-frequency compressor, the exhaust of the low-temperature variable-frequency compressor is connected with an air suction main pipe of the medium-temperature system after being connected with a de-superheater in series, the air suction main pipe of the medium-temperature system is respectively connected with a parallel variable-frequency compressor and a medium-temperature variable-frequency compressor, the parallel variable-frequency compressor and the medium-temperature variable-frequency compressor are arranged in parallel, an exhaust pipeline of the parallel variable-frequency compressor and an exhaust pipeline of the medium-temperature variable-frequency compressor are jointly connected onto; the other path of the exhaust main pipeline of the medium temperature system is used for connecting oil and the gas cooler; the gas cooler is connected with the gas heat exchanger through a main exhaust pipeline of the medium-temperature system; one pipeline of the gas heat exchanger is connected with a medium-temperature liquid storage device, the other pipeline of the gas heat exchanger is connected with a main gas suction pipe of the medium-temperature frequency conversion compressor, the medium-temperature liquid storage device is respectively connected with a low-temperature heat regenerator and a medium-temperature heat regenerator through pipelines, an inlet and an outlet of a low-temperature evaporator are respectively connected with the low-temperature heat regenerator, the low-temperature heat regenerator is connected with a gas suction pipe of the low-temperature frequency conversion compressor through a pipeline, an inlet and an outlet of the medium-temperature evaporator are respectively connected with the medium-temperature heat;
the gas cooler is additionally provided with a cooling device.
Further, in the above-mentioned case,
the cooling device includes: a water tank, a spray water pump and a spray head;
an independent water spray pipeline is arranged to connect the water tank and the spray water pump, the spray water pump is fixed on the gas cooler, an output pipeline of the spray water pump is connected with the spray head, and the spray position of the spray head just covers the gas cooler;
the gas cooler adopts a finned radiator, the spray head adopts a high-pressure spray head, and the spray head is fixed on an external radiating fin of the gas cooler.
Further, the cooling device further includes: and the water recovery device is used for recovering spray water of the gas cooler.
Further, in the above-mentioned case,
the heat exchange device comprises: the heat recovery heat exchange plate exchange and heat recovery circulating pump and the hot water tank;
the exhaust main pipeline of the medium temperature system is positioned at the front end pipeline of the gas cooler and is connected with the heat recovery plate in parallel, the heat recovery plate is connected with the hot water tank, the hot water tank is connected with the water pump through a pipeline, and the water pump is connected with the heat recovery plate in a replacement mode.
By adopting the technical scheme, the invention can absorb heat by evaporating CO under the refrigeration working condition2After being overheated by a low-temperature heat regenerator, the gaseous refrigerant enters a low-temperature variable-frequency compressor to be sucked, and CO discharged by the compressed low-temperature variable-frequency compressor and cooled by a desuperheater2The refrigerant and the medium-temperature refrigerant gas which is evaporated and absorbs heat by the medium-temperature evaporator and is overheated by the medium-temperature heat regenerator simultaneously flow out of the medium-temperature liquid storage deviceThe refrigerant gas after being throttled and decompressed by the pressure reducing valve is sucked into the medium-temperature variable frequency compressor, meanwhile, the other path of refrigerant gas from the medium-temperature reservoir enters the parallel variable frequency compressor after being heated by the gas heat exchanger, and the high-temperature and high-pressure CO is compressed by the parallel variable frequency compressor and the medium-temperature variable frequency compressor2Separating refrigerant and oil from refrigerant gas by an oil separator, returning the oil to the medium-temperature and low-temperature variable frequency compressor, and separating high-temperature and high-pressure CO from the oil separator2After entering a gas cooler for cooling, medium-pressure refrigerant gas coming out of a medium-temperature liquid storage device is heated through a gas heat exchanger, secondary cooling is realized, then the refrigerant gas passes through a pressure reducing valve and is changed into medium-pressure gas-liquid mixture, the medium-temperature liquid storage device is filled with the medium-temperature liquid storage device, a part of the gas at the upper part is throttled and reduced in pressure again, the gas returning from a medium-temperature evaporator and the exhaust gas of a low-temperature frequency conversion compressor are mixed and then enter the medium-temperature frequency conversion compressor, the other part of the gas is heated through the gas heat exchanger and then enters a parallel frequency conversion compressor, the liquid in the medium-temperature liquid storage device respectively enters a medium-temperature evaporator and a low-temperature evaporator through a medium-temperature heat regenerator and a low-temperature heat regenerator, and then enters.
During refrigeration, high-temperature and high-pressure refrigerant steam separated from oil enters the heat recovery plate to heat water pumped from the hot water tank through the water pump, and the heated hot water returns to the hot water tank to be mixed with original cold water in the hot water tank and then is supplied to a water source.
In order to stably control the temperature of a refrigerant at the outlet of the air cooler, a set of auxiliary water spraying pipelines are arranged above the air cooler, water in a water tank is sprayed on the air cooler through a high-pressure spraying nozzle arranged outside a heat exchange plate of the air cooler by a spraying water pump, and the air cooler is cooled by a pipeline.
Compared with the prior art, the invention adopting the technical scheme has the following advantages:
1. frequency conversion technology: the low-temperature, medium-temperature and parallel compression three suction sections of the whole set of refrigerating system unit all adopt the frequency conversion technology. The first compressor of each air suction section is subjected to frequency conversion, and the frequency conversion range is 30-70 Hz. The frequency conversion technology can realize that the operation of the fluctuation compressor of the system load is relatively stable, and the control of the evaporation pressure is stable and reasonable. The frequency conversion technology reduces frequent start and stop of the compressor caused by the fluctuation of the system load, thereby achieving the purposes of reducing the system pressure fluctuation and protecting the service life of the machine head. And when the load is smaller, the rotating speed of the motor is reduced, and the running power of the motor is reduced, so that the energy is further saved.
2. Supercritical CO2The temperature control technology comprises the following steps: for CO2For a transcritical refrigeration system, the COP of the whole system operation is crucial to the outlet temperature of the air cooler, and how to control the temperature becomes the key to the whole system operation. The system adopts a spray water technology, and when the ambient temperature is high, the temperature is reduced by manufacturing spray water mist. The temperature difference of the outlet temperature of the air cooler before and after spraying can reach about 10 ℃. The safety of system operation is effectively guaranteed, and COP of system operation is improved.
3. Application of the heat recovery technology: a heat recovery plate is additionally arranged in the system for replacement, so that the exhaust temperature is reduced, and the energy-saving safety of the system is ensured; the waste heat recovery function is realized, and the comprehensive COP of the whole system is improved; the air cooler has the function of an air cooler in an emergency, the damage of the air cooler is realized, and the system is kept running. CO22Due to the excellent heating capacity, the cold and hot integrated application will be a model of energy-saving application.
4. Parallel compression technique: the whole set of refrigeration system adopts the integrated design of three evaporation sections of low temperature, medium temperature and parallel compression. The existence of the parallel compressor enables most of CO2 gaseous refrigerant in the flash tank to enter the compressor, effectively reduces the flow of the refrigerant entering the medium-temperature system, thereby achieving the purpose of achieving the same refrigeration effect through a small pressure ratio and improving the running stability and COP value of the whole system.
5. The design of the medium-low temperature integrated structure: the load is comprehensively considered, and the low-temperature compressor and the medium-temperature compressor are reasonably configured. The low-temperature refrigeration load is compressed by the low-temperature compressor and the medium-temperature compressor at two stages, so that the compression ratio of a single machine head is reduced, the power consumption of the compression is reduced, and the running COP of the system is improved. The medium-temperature compressor and the low-temperature compressor are designed according to the optimized proportion, so that the function of multiple working conditions of one unit is realized, the floor area of the whole system is saved, and the filling amount of unit piping and refrigerants is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are 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 diagram of the overall layout of the present invention.
In the figure:
1. a low temperature variable frequency compressor;
2. removing a superheater;
3. a medium-temperature variable-frequency compressor;
4. an oil separator;
5. a heat recovery plate;
6. a hot water tank;
7. a gas cooler;
8. a water pump;
9. a spray water pump;
10. a gas heat exchanger;
11. a medium temperature reservoir;
12. a medium temperature evaporator;
13. a medium temperature heat regenerator;
14. a low temperature evaporator;
15. a low temperature regenerator;
16. a parallel inverter compressor;
17. a water tank;
D. a cooling device;
C. a heat exchange device;
B. a medium temperature system exhaust main pipeline;
A. the medium temperature system inhales the main pipe.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in FIG. 1, the present invention provides a CO2Transcritical cold and heat comprehensive utilization system includes:
the system comprises a low-temperature variable-frequency compressor 1, a desuperheater 2, a medium-temperature variable-frequency compressor 3, a parallel variable-frequency compressor 16, an oil separator 4, a gas cooler 7, a gas heat exchanger 10, a medium-temperature liquid reservoir 11, a medium-temperature evaporator 12, a low-temperature evaporator 14, a medium-temperature heat regenerator 13 and a low-temperature heat regenerator 15;
the low-temperature evaporator 1 is connected with a low-temperature heat regenerator 15 and then connected with an air suction pipeline of a low-temperature variable-frequency compressor 1, the exhaust of the low-temperature variable-frequency compressor 1 is connected with an air suction main pipe A of a medium-temperature system after being connected with an exhaust superheater 2 in series, the air suction main pipe A of the medium-temperature system is respectively connected with a parallel variable-frequency compressor 16 and a medium-temperature variable-frequency compressor 3, the parallel variable-frequency compressor 16 and the medium-temperature variable-frequency compressor 3 are arranged in parallel, an exhaust pipeline of the parallel variable-frequency compressor 16 and an exhaust pipeline of the medium-temperature variable-frequency compressor 3 are jointly connected onto an exhaust main pipeline B; the oil content 4 is connected with the gas cooler 7 through the other path of the medium-temperature system exhaust main pipeline B; the gas cooler 7 is connected with the gas heat exchanger 10 through a medium-temperature system exhaust main pipeline B; one pipeline of the gas heat exchanger 10 is connected with a medium temperature liquid storage device 11, the other pipeline is connected with a main gas suction pipe of the medium temperature variable frequency compressor 3, the medium temperature liquid storage device 11 is respectively connected with a low temperature heat regenerator 15 and a medium temperature heat regenerator 13 through pipelines, an inlet and an outlet of a low temperature evaporator 14 are respectively connected with the low temperature heat regenerator 15, the low temperature heat regenerator 15 is connected with a gas suction pipe of the low temperature variable frequency compressor 1 through a pipeline, an inlet and an outlet of a medium temperature evaporator 12 are respectively connected with the medium temperature heat regenerator 13, and the medium temperature heat regenerator 13 is connected with the gas suction pipe of the medium;
the gas cooler 7 is additionally provided with a cooling device D.
Further, in the above-mentioned case,
the cooling device D includes: a water tank 17, a spray water pump 9 and a spray head;
an independent water spray pipeline is arranged to connect the water tank 17 and the spray water pump 9, the spray water pump 9 is fixed on the gas cooler 7, an output pipeline of the spray water pump 9 is connected with a spray head, and the spray position of the spray head just covers the gas cooler 7;
the gas cooler 7 adopts a finned radiator, the spray head adopts a high-pressure spray head, and the spray head is fixed on an external radiator of the gas cooler 7.
Further, the cooling device D further includes: and a water recovery device for recovering the shower water of the gas cooler 7.
Further, in the above-mentioned case,
heat transfer device C includes: the heat recovery heat exchange plate 5, the heat recovery circulating pump 8 and the hot water tank 6;
the middle temperature system exhaust main pipeline B is positioned at the front end of the gas cooler 7, a pipeline is connected with the heat recovery plate exchanger 5 in parallel, the heat recovery plate exchanger 5 is connected with the hot water tank 6, the hot water tank 6 is connected with the water pump 8 through a pipeline, and the water pump 8 is connected with the heat recovery plate exchanger 5.
By adopting the technical scheme, the invention can absorb heat by evaporating CO under the refrigeration working condition2After being overheated by the low-temperature heat regenerator 15, the gaseous refrigerant enters the low-temperature variable-frequency compressor 1 to be sucked, and CO which is exhausted by the compressed low-temperature variable-frequency compressor 1 and cooled by the superheater 2 is discharged2The refrigerant and the medium temperature refrigerant gas which is evaporated and absorbs heat by the medium temperature evaporator 12 and overheated by the medium temperature heat regenerator 13 are discharged from the medium temperature liquid storage device 11, the refrigerant gas which is throttled and decompressed by the pressure reducing valve is sucked into the medium temperature frequency conversion compressor 3, meanwhile, the other path of refrigerant gas discharged from the medium temperature liquid storage device 11 is heated by the gas heat exchanger 10 and then enters the parallel frequency conversion compressor 16, and the high temperature and high pressure CO compressed by the parallel frequency conversion compressor 16 and the medium temperature frequency conversion compressor 3 is discharged2The refrigerant gas is separated from the refrigerant and oil by the oil separator 4, the oil returns to the medium-temperature and low-temperature variable frequency compressor, and the high-temperature and high-pressure CO is discharged from the oil separator 42The refrigerant gas enters a gas cooler 7 for cooling, then passes through a gas heat exchanger 10 to heat medium-pressure refrigerant gas from a medium-temperature liquid storage 11, simultaneously realizes secondary cooling, then passes through a pressure reducing valve to become medium-pressure gas-liquid mixture, and enters the gas coolerIn the medium temperature reservoir 11, a part of the gas at the upper part is throttled and depressurized again, and enters the medium temperature variable frequency compressor 3 after being mixed with the gas returned from the medium temperature evaporator 12 and the exhaust gas of the low temperature variable frequency compressor 1, the other part enters the parallel variable frequency compressor 16 after being heated by the gas heat exchanger 10, the liquid in the medium temperature reservoir 11 enters the medium temperature evaporator 12 and the low temperature evaporator 14 through the medium temperature heat regenerator 13 and the low temperature heat regenerator 15 respectively, and enters the medium temperature variable frequency compressor 3 and the low temperature variable frequency compressor 1 after evaporation and heat absorption, so as to complete a closed refrigeration cycle.
During refrigeration, high-temperature and high-pressure refrigerant steam separated from oil enters the heat recovery plate 5 to heat water pumped from the hot water tank 6 through the water pump 8, and the heated hot water returns to the hot water tank 6 to be mixed with original cold water in the hot water tank 6 and then is supplied to a water source.
In order to stably control the temperature of the refrigerant at the outlet of the air cooler, a set of auxiliary water spraying pipelines are arranged above the air cooler 7, water in a water tank 17 is sprayed on the air cooler 7 through a high-pressure spraying nozzle arranged outside a heat exchange plate of the air cooler 7 by a spraying water pump 9, and the air cooler pipelines are cooled.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. CO (carbon monoxide)2Transcritical cold and hot comprehensive utilization system, its characterized in that includes:
the system comprises a low-temperature variable-frequency compressor (1), a desuperheater (2), a medium-temperature variable-frequency compressor (3), a parallel variable-frequency compressor (16), an oil separator (4), a gas cooler (7), a gas heat exchanger (10), a medium-temperature liquid reservoir (11), a medium-temperature evaporator (12), a low-temperature evaporator (14), a medium-temperature heat regenerator (13) and a low-temperature heat regenerator (15);
the low-temperature evaporator (1) is connected with a low-temperature heat regenerator (15) and then connected with an air suction pipeline of a low-temperature variable-frequency compressor (1), the exhaust of the low-temperature variable-frequency compressor (1) is connected with a desuperheater (2) in series and then connected with an intermediate-temperature system air suction main pipe (A), the intermediate-temperature system air suction main pipe (A) is respectively connected with a parallel variable-frequency compressor (16) and an intermediate-temperature variable-frequency compressor (3), the parallel variable-frequency compressor (16) and the intermediate-temperature variable-frequency compressor (3) are arranged in parallel, an exhaust pipeline of the parallel variable-frequency compressor (16) and an exhaust pipeline of the intermediate-temperature variable-frequency compressor (3) are jointly connected to an exhaust main pipeline (B) of the intermediate-temperature system, and one pipeline; the other path of the medium temperature system exhaust main pipeline (B) connects the oil component (4) and the gas cooler (7); the gas cooler (7) is connected with the gas heat exchanger (10) through a main exhaust pipeline (B) of the medium-temperature system; one pipeline of the gas heat exchanger (10) is connected with a medium-temperature liquid accumulator (11), the other pipeline is connected with a main gas suction pipe of the medium-temperature variable-frequency compressor (3), the medium-temperature liquid accumulator (11) is respectively connected with a low-temperature heat regenerator (15) and a medium-temperature heat regenerator (13) through pipelines, an inlet and an outlet of a low-temperature evaporator (14) are respectively connected with the low-temperature heat regenerator (15), the low-temperature heat regenerator (15) is connected with a gas suction pipe of the low-temperature variable-frequency compressor (1) through a pipeline, an inlet and an outlet of a medium-temperature evaporator (12) are respectively connected with the medium-temperature heat regenerator (13), and the medium-temperature heat regenerator (13) is connected with;
the gas cooler (7) is additionally provided with a cooling device (D).
2. CO according to claim 12Transcritical cold and hot comprehensive utilization system, its characterized in that:
the cooling device (D) comprises: a water tank (10), a spray water pump (9) and a spray head;
an independent water spraying pipeline is arranged to connect the water tank (10) and the spray water pump (9), the spray water pump (9) is fixed on the gas cooler (7), an output pipeline of the spray water pump (9) is connected with the spray head, and the spray position of the spray head just covers the heat dissipation part of the gas cooler (7).
3. CO according to claim 22Transcritical cold and hot comprehensive utilization system, its characterized in that:
the cooling device (D) further comprises: a water recovery device for recovering the spray water of the gas cooler (7).
4. CO according to any one of claims 1 to 32Transcritical cold and hot comprehensive utilization system, its characterized in that:
the heat exchange device (C) comprises: the heat recovery heat exchange plate (5), the heat recovery circulating pump (8) and the hot water tank (6);
the middle temperature system exhaust main pipeline (B) is positioned at the front end pipeline of the gas cooler (7) and is connected with the heat recovery plate exchanger (5) in parallel, the heat recovery plate exchanger (5) is connected with the hot water tank (6), the hot water tank (6) is connected with the water pump (8) through a pipeline, and the water pump (8) is connected with the heat recovery plate exchanger (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774751.4A CN111928523A (en) | 2020-08-04 | 2020-08-04 | CO (carbon monoxide)2Transcritical cold and heat comprehensive utilization system |
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| CN202010774751.4A CN111928523A (en) | 2020-08-04 | 2020-08-04 | CO (carbon monoxide)2Transcritical cold and heat comprehensive utilization system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN115164430A (en) * | 2022-06-08 | 2022-10-11 | 松下冷机系统（大连）有限公司 | CO applied to ship tail gas carbon capture 2 Transcritical refrigerating unit |
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