CN217785512U - Ejector type grading refrigeration cycle system suitable for air liquefaction - Google Patents
Ejector type grading refrigeration cycle system suitable for air liquefaction Download PDFInfo
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- CN217785512U CN217785512U CN202221104295.3U CN202221104295U CN217785512U CN 217785512 U CN217785512 U CN 217785512U CN 202221104295 U CN202221104295 U CN 202221104295U CN 217785512 U CN217785512 U CN 217785512U
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 35
- 230000001172 regenerating effect Effects 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 230000006837 decompression Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 10
- 238000004146 energy storage Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0012—Primary atmospheric gases, e.g. air
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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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
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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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0262—Details of the cold heat exchange system
- F25J1/0264—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
- F25J1/0265—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer
-
- 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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/60—Expansion by ejector or injector, e.g. "Gasstrahlpumpe", "venturi mixing", "jet pumps"
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses an ejector type grading refrigeration cycle system suitable for air liquefaction mainly includes compressor, condenser, backheat heat exchanger, expansion valve, tee bend control valve, looks liquid ware, medium temperature evaporimeter, low temperature evaporimeter and ejector etc.. The outlet of the compressor is connected with the inlet of the condenser, the outlet of the condenser exchanges heat with the output of the ejector through the regenerative heat exchanger, then the outlet of the condenser passes through the first-stage expansion valve and is divided into two parts through the three-way control valve, one part enters the high-pressure inlet of the ejector after passing through the medium-temperature evaporator, the other part passes through the second-stage expansion valve and passes through the low-temperature evaporator after passing through the liquid observation device, then the low-pressure injection inlet of the ejector is returned, the outlet of the ejector returns to the compressor after passing through the regenerative heat exchanger, the second-stage refrigeration cycle is driven by the pressure energy in the recovered decompression by utilizing the injection effect of the ejector, and the two-stage cooling of the air is realized.
Description
Technical Field
The utility model relates to a novel energy storage and refrigeration technology application, more specifically say, relate to a hierarchical refrigeration cycle system of sprayer formula suitable for air liquefaction.
Background
In recent years, with the increasing prominence and the increasing reduction of the call for carbon emission of the traditional energy crisis, the concept of new energy storage is developed rapidly, and new working media, technical principles or equipment are utilized to carry out high-efficiency conversion, storage and use on energy, wherein one important application direction comprises liquefied air energy storage, low-temperature environment is required to be provided through refrigeration cycle, and air is liquefied by deep cooling.
The traditional refrigeration cycle mainly comprises basic processes such as compression, condensation, throttling, evaporation and the like, the temperature generally realized does not need to be too low, the working requirement can be met through one-stage circulation, but an extremely low temperature environment needs to be established, and the gas is difficult to realize through single-stage refrigeration cycle when being subjected to cryogenic liquefaction. Throttling energy loss in a throttling valve commonly used in a traditional refrigeration scheme is large, a common expansion machine in a large-scale gas liquefaction system is used for replacing the throttling valve, the refrigeration efficiency is higher, the large-scale centralized energy storage device is more suitable for large-scale centralized energy storage, and the large-scale centralized energy storage device is large in size, complex in structure and limited to a certain extent. For the demand of middle and small-scale liquefaction work of distributed energy storage, how to improve the working effect of graded refrigeration needs to be considered, the energy efficiency characteristic needs to be improved, and small-sized and efficient equipment is adopted to reduce energy loss.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an ejector type grading refrigeration cycle system suitable for air liquefaction, the purpose adapts to the demand of middle and small-scale distributed liquefaction energy storage, and its specific technical scheme is as follows:
an ejector type grading refrigeration cycle system suitable for air liquefaction is composed of a compressor, a condenser, a regenerative heat exchanger, a first-stage expansion valve, a three-way control valve, a second-stage expansion valve, a liquid level indicator, a medium-temperature evaporator, a low-temperature evaporator and an ejector, wherein the first-stage refrigeration cycle and the second-stage refrigeration cycle are formed, and air is sequentially cooled by the medium-temperature evaporator and the low-temperature evaporator;
the first stage of refrigeration cycle is formed by sequentially connecting a compressor, a condenser, a regenerative heat exchanger, a first stage expansion valve, a three-way control valve, a medium temperature evaporator and an ejector, wherein the outlet of the compressor is connected with the inlet of the condenser, the outlet of the condenser is connected with the hot end inlet of the regenerative heat exchanger, the cold end inlet of the regenerative heat exchanger is connected with the medium pressure outlet of the ejector, cold end and hot end working media exchange heat in the regenerative heat exchanger, the hot end outlet of the regenerative heat exchanger is connected with the inlet of the first stage expansion valve, the cold end outlet of the regenerative heat exchanger is connected with the inlet of the compressor, the outlet of the first stage expansion valve is connected with the inlet of the three-way control valve, the left side outlet of the three-way control valve is connected with the cold end inlet of the medium temperature evaporator, and the cold end outlet of the medium temperature evaporator is connected with the high pressure inlet of the ejector;
the second stage refrigeration cycle is composed of a three-way control valve, a second stage expansion valve, a liquid observing device, a low-temperature evaporator and an ejector, wherein the right outlet of the three-way control valve is connected with the inlet of the second stage expansion valve, the outlet of the second stage expansion valve is connected with the inlet of the liquid observing device, the outlet of the liquid observing device is connected with the cold end inlet of the low-temperature evaporator, and the cold end outlet of the low-temperature evaporator is connected with the low-pressure inlet of the ejector.
Compared with the traditional refrigeration system, the utility model discloses use sprayer and expansion valve to combine the refrigeration that realizes different warm areas, utilize the pressure energy of sprayer in to the refrigerant to retrieve, simplified equipment structure simultaneously, improved refrigeration temperature's control flexibility, have the optimization to system energy consumption level.
Preferably, the ejector has three interfaces, namely a high-pressure inlet, a low-pressure inlet and a medium-pressure outlet, and fluid entering from the high-pressure inlet ejects and mixes fluid at the low-pressure inlet and then flows out of the pressure outlet together.
The utility model discloses an ejector type grading refrigeration cycle system suitable for air liquefaction mainly includes compressor, condenser, backheat heat exchanger, expansion valve, tee bend control valve, looks liquid ware, medium temperature evaporimeter, low temperature evaporimeter and ejector etc.. The outlet of the compressor is connected with the inlet of the condenser, the outlet of the condenser exchanges heat with the output of the ejector through the regenerative heat exchanger, then the outlet of the condenser passes through the first-stage expansion valve and is divided into two parts through the three-way control valve, one part enters the high-pressure inlet of the ejector after passing through the medium-temperature evaporator, the other part passes through the second-stage expansion valve and passes through the low-temperature evaporator after passing through the liquid observation device, then the low-pressure injection inlet of the ejector is returned, the outlet of the ejector returns to the compressor after passing through the regenerative heat exchanger, the second-stage refrigeration cycle is driven by the pressure energy in the recovered decompression by utilizing the injection effect of the ejector, and the two-stage cooling of the air is realized.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of an ejector-type staged refrigeration cycle system suitable for air liquefaction according to the present invention.
Reference numerals:
the system comprises a compressor 1, a condenser 2, a regenerative heat exchanger 3, a first-stage expansion valve 4, a three-way control valve 5, a second-stage expansion valve 6, a liquid observing device 7, a medium-temperature evaporator 8, a low-temperature evaporator 9 and an ejector 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example (b):
as shown in fig. 1, the utility model provides a pair of ejector type grading refrigeration cycle system suitable for air liquefaction comprises compressor 1, condenser 2, backheat heat exchanger 3, first order expansion valve 4, three-way control valve 5, second stage expansion valve 6, sight liquid 7, medium temperature evaporimeter 8, low temperature evaporimeter 9 and sprayer 10, constitutes first order refrigeration cycle and second stage refrigeration cycle, cools off the air in proper order through medium temperature evaporimeter 8 and low temperature evaporimeter 9. In fig. 1, a thick line indicates an air flow path, and the other lines indicate cooling flow paths.
In particular, the method comprises the following steps of,
the first-stage refrigeration cycle is formed by sequentially connecting a compressor 1, a condenser 2, a regenerative heat exchanger 3, a first-stage expansion valve 4, a three-way control valve 5, a medium-temperature evaporator 8 and an ejector 10, wherein an outlet of the compressor 1 is connected with an inlet of the condenser 2, an outlet of the condenser 2 is connected with a hot end inlet of the regenerative heat exchanger 3, a cold end inlet of the regenerative heat exchanger 3 is connected with a medium-pressure outlet of the ejector 10, cold end and hot end working media exchange heat in the regenerative heat exchanger 3, a hot end outlet of the regenerative heat exchanger 3 is connected with an inlet of the first-stage expansion valve 4, a cold end outlet of the regenerative heat exchanger 3 is connected with an inlet of the compressor 1, an outlet of the first-stage expansion valve 4 is connected with an inlet of the three-way control valve 5, a left side outlet of the three-way control valve 5 is connected with a cold end inlet of the medium-temperature evaporator 8, and a cold end outlet of the medium-temperature evaporator 8 is connected with a high-pressure inlet of the ejector 10;
the second stage refrigeration cycle is composed of a three-way control valve 5, a second stage expansion valve 6, a liquid observing device 7, a low temperature evaporator 9 and an ejector 10, wherein the right outlet of the three-way control valve 5 is connected with the inlet of the second stage expansion valve 6, the outlet of the second stage expansion valve 6 is connected with the inlet of the liquid observing device 7, the outlet of the liquid observing device 7 is connected with the cold end inlet of the low temperature evaporator 9, and the cold end outlet of the low temperature evaporator 9 is connected with the low pressure inlet of the ejector 10.
The ejector 10 is provided with three interfaces, namely a high-pressure inlet, a low-pressure inlet and a medium-pressure outlet, the low-pressure inlet is a low-pressure injection inlet, and fluid entering the high-pressure inlet injects and mixes fluid at the low-pressure inlet and flows out of the low-pressure inlet together with the fluid.
When the system operates, the gaseous refrigerant is compressed by the compressor 1 and then becomes a high-temperature high-pressure state, is primarily cooled by the condenser 2, then enters the regenerative heat exchanger 3, and is further subjected to heat exchange and cooling with the low-temperature refrigerant output from the ejector 10. The cooled refrigerant is throttled and expanded by a first-stage expansion valve 4, the pressure and the temperature are obviously reduced, and then the refrigerant is divided into two paths by a three-way control valve 5, one path is output from the left side and is subjected to first-stage cooling on the input air to be cooled by a medium-temperature heat exchanger 8, and the refrigerant is output by the medium-temperature heat exchanger 8 and then enters a high-pressure inlet end of an ejector 10; the other path is output from the right side and is subjected to throttling expansion again through a second-stage expansion valve 6 to reach lower temperature and pressure, at the moment, the refrigerant enters a gas-liquid two-phase mixed state, a liquid-containing condition in a refrigerant channel can be observed through a liquid receiver 7, the branch further exchanges heat with cooled air output by a medium-temperature evaporator 8 through a low-temperature evaporator 9 to cool the cooled air to lower temperature, and then the refrigerant is output by the low-temperature evaporator 9, enters a low-pressure inlet end of an ejector 10, is ejected by the refrigerant at a high-pressure inlet and then is mixed and output, and returns to the compressor 1 after absorbing heat through a regenerative heat exchanger 3 to complete one-time complete working cycle.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. An ejector type grading refrigeration cycle system suitable for air liquefaction is characterized by comprising a compressor (1), a condenser (2), a regenerative heat exchanger (3), a first-stage expansion valve (4), a three-way control valve (5), a second-stage expansion valve (6), a liquid level indicator (7), a medium temperature evaporator (8), a low temperature evaporator (9) and an ejector (10), wherein the first-stage refrigeration cycle and the second-stage refrigeration cycle are formed, and air is sequentially cooled through the medium temperature evaporator (8) and the low temperature evaporator (9);
the first-stage refrigeration cycle is formed by sequentially connecting a compressor (1), a condenser (2), a regenerative heat exchanger (3), a first-stage expansion valve (4), a three-way control valve (5), a medium-temperature evaporator (8) and an ejector (10), wherein an outlet of the compressor (1) is connected with an inlet of the condenser (2), an outlet of the condenser (2) is connected with a hot end inlet of the regenerative heat exchanger (3), a cold end inlet of the regenerative heat exchanger (3) is connected with a medium-pressure outlet of the ejector (10), cold end and hot end working media exchange heat in the regenerative heat exchanger (3), a hot end outlet of the regenerative heat exchanger (3) is connected with an inlet of the first-stage expansion valve (4), a cold end outlet of the regenerative heat exchanger (3) is connected with an inlet of the compressor (1), an outlet of the first-stage expansion valve (4) is connected with an inlet of the three-way control valve (5), a left side outlet of the three-way control valve (5) is connected with an inlet of the medium-temperature evaporator (8), and a cold end outlet of the medium-temperature evaporator (8) is connected with a high-pressure inlet of the ejector (10);
the second-stage refrigeration cycle is composed of a three-way control valve (5), a second-stage expansion valve (6), a liquid observing device (7), a low-temperature evaporator (9) and an ejector (10), wherein a right-side outlet of the three-way control valve (5) is connected with an inlet of the second-stage expansion valve (6), an outlet of the second-stage expansion valve (6) is connected with an inlet of the liquid observing device (7), an outlet of the liquid observing device (7) is connected with a cold-end inlet of the low-temperature evaporator (9), and a cold-end outlet of the low-temperature evaporator (9) is connected with a low-pressure inlet of the ejector (10).
2. The ejector-type staged refrigeration cycle system for air liquefaction according to claim 1, wherein the ejector (10) has three ports, namely, a high pressure inlet, a low pressure inlet and a medium pressure outlet, and the fluid entering from the high pressure inlet ejects and mixes the fluid at the low pressure inlet and flows out from the medium pressure outlet together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221104295.3U CN217785512U (en) | 2022-05-09 | 2022-05-09 | Ejector type grading refrigeration cycle system suitable for air liquefaction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221104295.3U CN217785512U (en) | 2022-05-09 | 2022-05-09 | Ejector type grading refrigeration cycle system suitable for air liquefaction |
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| CN217785512U true CN217785512U (en) | 2022-11-11 |
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| CN202221104295.3U Active CN217785512U (en) | 2022-05-09 | 2022-05-09 | Ejector type grading refrigeration cycle system suitable for air liquefaction |
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| CN (1) | CN217785512U (en) |
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