CN115160989A - Environment-friendly mixed refrigerant, preparation method and application thereof, and refrigeration system - Google Patents
Environment-friendly mixed refrigerant, preparation method and application thereof, and refrigeration system Download PDFInfo
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- CN115160989A CN115160989A CN202210918318.2A CN202210918318A CN115160989A CN 115160989 A CN115160989 A CN 115160989A CN 202210918318 A CN202210918318 A CN 202210918318A CN 115160989 A CN115160989 A CN 115160989A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 116
- 238000005057 refrigeration Methods 0.000 title claims description 15
- 238000002360 preparation method Methods 0.000 title abstract description 6
- NBVXSUQYWXRMNV-UHFFFAOYSA-N monofluoromethane Natural products FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 168
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical group CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000001294 propane Substances 0.000 claims abstract description 53
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims abstract description 34
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims abstract description 30
- VPAYJEUHKVESSD-UHFFFAOYSA-N trifluoroiodomethane Chemical compound FC(F)(F)I VPAYJEUHKVESSD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000001282 iso-butane Substances 0.000 claims abstract description 15
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 8
- -1 1-difluoroethane Chemical compound 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 33
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical group CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 claims description 18
- 229940051271 1,1-difluoroethane Drugs 0.000 claims description 12
- 239000007791 liquid phase Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 10
- 230000002427 irreversible effect Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 31
- 239000000203 mixture Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 238000010792 warming Methods 0.000 description 3
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- PGJHURKAWUJHLJ-UHFFFAOYSA-N 1,1,2,3-tetrafluoroprop-1-ene Chemical compound FCC(F)=C(F)F PGJHURKAWUJHLJ-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
- C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/11—Ethers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
- C09K2205/122—Halogenated hydrocarbons
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The application relates to the technical field of refrigerants, in particular to an environment-friendly mixed refrigerant, a preparation method of the environment-friendly mixed refrigerant, application of the environment-friendly mixed refrigerant and a refrigerating system. The environment-friendly mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is one selected from 1, 2-tetrafluoroethane, dimethyl ether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150. The environment-friendly mixed refrigerant provided by the embodiment of the invention has good environmental protection performance, the GWP is less than or equal to 150, the heat exchange temperature difference can be reduced, the irreversible loss in the heat exchange process is reduced, the system circulation is close to Lorenz circulation, and the system energy efficiency is improved.
Description
Technical Field
The application relates to the technical field of refrigerants, in particular to an environment-friendly mixed refrigerant, a preparation method of the environment-friendly mixed refrigerant, application of the environment-friendly mixed refrigerant and a refrigeration system.
Background
In recent years, in order to cope with global warming and the frequent occurrence of extreme weather, a series of policies have been internationally made to accelerate the elimination of HCFCs refrigerants and gradually reduce the amount of HFCs used, so as to restrict the use of high GWP refrigerants. According to the relevant protocol, the next generation refrigerant should have zero ODP, low GWP. At present, the warming potential (GWP is more than or equal to 1300) of refrigerants such as HFCs refrigerants R134A, 410A, R134A, R404A, R407C and the like widely applied to the refrigeration and air-conditioning industry is high, so that alternative working media with excellent environmental protection performance are urgently needed to be found. For example, 1, 2-tetrafluoroethane (R134 a) is widely used in the fields of automobile air-conditioners and other refrigeration systems due to the characteristics of no toxicity, incombustibility, no corrosion, good material compatibility and the like, but with the further enhancement of Global Warming Potential (GWP) high refrigerant control at home and abroad, HFCs refrigerants such as R134a face reduction and elimination.
Because no better alternative scheme is found in pure working medium at present, the mixed refrigerant can balance the characteristics of all refrigerants, and the research on the mixed refrigerant becomes a hotspot of refrigerant research. Therefore, a refrigerant with good environmental protection performance and thermal performance equivalent to or better than that of the existing refrigerant needs to be found for substitution, so as to meet the requirements of the refrigerant on environmental protection and high efficiency to the maximum extent.
Disclosure of Invention
In order to solve the technical problem of poor environmental protection performance of related refrigerants in the prior art, the invention mainly aims to provide an environment-friendly mixed refrigerant, form a substitute refrigerant with lower GWP and equivalent or better thermodynamic performance compared with the existing refrigerant, and provide a preparation method of the refrigerant and a refrigeration system applying the refrigerant.
In order to achieve the above object, according to a first aspect of the present invention, there is provided an environment-friendly mixed refrigerant.
The environment-friendly mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is one selected from 1, 2-tetrafluoroethane, dimethylether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150.
Further, the third component is 1, 2-tetrafluoroethane, and the environment-friendly mixed refrigerant comprises 15-30% of monofluoromethane, 65-80% of propane and 5% of 1, 2-tetrafluoroethane in percentage by mass.
Further, the third component is dimethyl ether, and the environment-friendly mixed refrigerant comprises, by mass, 15-80% of monofluoromethane, 5-70% of propane and 10-50% of dimethyl ether.
Further, the third component is 1, 1-difluoroethane, and the environment-friendly mixed refrigerant comprises 5-80% of monofluoromethane, 5-75% of propane and 5-80% of 1, 1-difluoroethane by mass percentage.
Further, the third component is trifluoroiodomethane, and the environment-friendly mixed refrigerant comprises, by mass, 40-50% of monofluoromethane, 5-20% of propane and 35-55% of trifluoroiodomethane.
Further, the third component is isobutane, and the environment-friendly mixed refrigerant comprises, by mass, 5-80% of monofluoromethane, 5-80% of propane and 10-40% of isobutane.
Further, the third component is n-butane, and the environment-friendly mixed refrigerant comprises 5-85% of monofluoromethane, 5-85% of propane and 5-25% of n-butane in percentage by mass.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a method for preparing an environmentally friendly mixed refrigerant, for preparing the environmentally friendly mixed refrigerant provided by the first aspect of the embodiments of the present invention, the method comprising the steps of: and mixing and stirring the components of the environment-friendly mixed refrigerant in a normal-temperature normal-pressure liquid phase state to obtain the environment-friendly mixed refrigerant.
In order to achieve the above object, according to a third aspect of the present invention, there is also disclosed a use of the environmentally friendly mixed refrigerant in a refrigeration system.
In order to achieve the above object, according to a fourth aspect of the present invention, there is also provided a refrigeration system, including a working medium, where the working medium includes the environment-friendly mixed refrigerant provided by the first aspect of the embodiments of the present invention.
The environment-friendly mixed refrigerant provided by the embodiment of the invention has good environmental protection performance, the GWP is less than or equal to 150, the heat exchange temperature difference can be reduced, the irreversible loss in the heat exchange process is reduced, the system circulation is close to Lorenz circulation, and the system energy efficiency is improved.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such article or apparatus. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The preparation method of the environment-friendly mixed refrigerant provided by the embodiment of the invention is that the components of the environment-friendly mixed refrigerant are physically mixed into a multi-component mixture according to the corresponding mass ratio under the normal temperature and normal pressure liquid phase state, and the multi-component mixture can be mixed and stirred under the normal temperature and normal pressure liquid phase state to prepare the environment-friendly mixed refrigerant. The basic parameters of each component substance in the environment-friendly mixed refrigerant in the embodiment of the invention are shown in the table 1.
TABLE 1 basic parameters of each component substance in the environmentally friendly mixed refrigerant
The environment-friendly mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is selected from one of 1, 2-tetrafluoroethane, dimethylether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150.
Optionally, the third component is 1, 2-tetrafluoroethane, and the environment-friendly mixed refrigerant comprises 15-30% of monofluoromethane, 65-80% of propane and 5% of 1, 2-tetrafluoroethane in percentage by mass. Optionally, the third component is dimethylether, and the environmentally-friendly mixed refrigerant comprises, by mass, 15-80% of monofluoromethane, 5-70% of propane, and 10-50% of dimethylether. Optionally, the third component is 1, 1-difluoroethane, and the environmentally-friendly mixed refrigerant comprises 5-80% of monofluoromethane, 5-75% of propane and 5-80% of 1, 1-difluoroethane in percentage by mass. Optionally, the third component is trifluoroiodomethane, and the environment-friendly mixed refrigerant comprises, by mass, 40-50% of monofluoromethane, 5-20% of propane and 35-55% of trifluoroiodomethane. Optionally, the third component is isobutane, and the environmentally-friendly mixed refrigerant comprises, by mass, 5-80% of monofluoromethane, 5-80% of propane and 10-40% of isobutane. Optionally, the third component is n-butane, and the environment-friendly mixed refrigerant comprises 5-85% of monofluoromethane, 5-85% of propane and 5-25% of n-butane in percentage by mass.
The environment-friendly mixed refrigerant with the ratio has the characteristics that the properties of all components can be balanced, and the temperature slippage of a non-azeotropic refrigerant can make the system cycle close to Lorenz cycle, so that the refrigerant has good environmental protection, the GWP is less than or equal to 150, the heat exchange temperature difference can be reduced, the irreversible loss in the heat exchange process is reduced, the system cycle is close to Lorenz cycle, and the system energy efficiency is improved.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions will be clearly and completely described below in conjunction with the embodiments of the present application, and the described embodiments are only a part of the embodiments of the present application, but not all embodiments. 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 application. The present application will be described in detail below with reference to preferred embodiments. Specific examples and comparative examples are given below, in which the proportions of the components are all mass percentages, and the sum of the mass percentages of the component substances of each environment-friendly mixed refrigerant is 100%, and the constitutions of the specific examples and comparative examples are shown in table 2.
Example 1
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) according to the mass ratio of 15 to 80 at a normal temperature in a liquid phase to obtain the environment-friendly mixed refrigerant.
Example 2
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) according to the mass ratio of 25 to 70 at a normal temperature in a liquid phase to obtain the environment-friendly mixed refrigerant.
Example 3
Uniformly physically mixing three components of monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) according to the mass ratio of 30.
Example 4
Uniformly physically mixing monofluoromethane (R41), propane (R290) and dimethyl ether (RE 170) according to a mass ratio of 45.
Example 5
Uniformly physically mixing monofluoromethane (R41), propane (R290) and dimethyl ether (RE 170) according to a mass ratio of 80.
Example 6
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and dimethyl ether (RE 170) according to the mass ratio of 20.
Example 7
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and dimethyl ether (RE 170) according to the mass ratio of 15.
Example 8
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) according to the mass ratio of 15 to 60 at normal temperature to obtain the environment-friendly mixed refrigerant.
Example 9
Uniformly physically mixing monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) according to the mass ratio of 20.
Example 10
Uniformly physically mixing monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) according to a mass ratio of 80.
Example 11
Uniformly physically mixing monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) according to the mass ratio of 5.
Example 12
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) according to the mass ratio of 10.
Example 13
Uniformly physically mixing monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) according to the mass ratio of 40.
Example 14
Uniformly physically mixing monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) according to the mass ratio of 50.
Example 15
Uniformly physically mixing monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) according to the mass ratio of 40 at normal temperature and in a liquid phase to obtain the environment-friendly mixed refrigerant.
Example 16
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and isobutane (R600 a) according to the mass ratio of 10 at a normal temperature to obtain the environment-friendly mixed refrigerant, wherein the mass ratio of the monofluoromethane (R41), the propane (R290) and the isobutane (R600 a) is 10.
Example 17
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and isobutane (R600 a) according to the mass ratio of 80.
Example 18
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and isobutane (R600 a) according to the mass ratio of 5.
Example 19
Uniformly physically mixing monofluoromethane (R41), propane (R290) and n-butane (R600) according to the mass ratio of 5
Example 20
Uniformly physically mixing monofluoromethane (R41), propane (R290) and n-butane (R600) according to the mass ratio of 85.
Example 21
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and n-butane (R600) according to the mass ratio of 5.
Example 22
Uniformly physically mixing monofluoromethane (R41), propane (R290) and n-butane (R600) according to the mass ratio of 10.
Comparative example 1
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) according to the mass ratio of 85 to 10 at normal temperature to obtain the environment-friendly mixed refrigerant.
Comparative example 2
Uniformly physically mixing monofluoromethane (R41), propane (R290) and dimethyl ether (RE 170) according to a mass ratio of 85 to 5, and obtaining the environment-friendly mixed refrigerant, wherein the mass ratio of the components is as follows.
Comparative example 3
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) according to the mass ratio of 75.
Comparative example 4
Uniformly physically mixing monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) according to a mass ratio of 75.
Comparative example 5
Uniformly physically mixing monofluoromethane (R41), propane (R290) and isobutane (R600 a) according to a mass ratio of 90.
Comparative example 6
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and n-butane (R600) according to a mass ratio of 90.
Comparative example 7
Uniformly and physically mixing monofluoromethane (R41), propane (R290) and 2,3 tetrafluoropropene (R1234 yf) according to a mass ratio of 80.
Comparative example 8
Uniformly and physically mixing monofluoromethane (R41), propylene (R1270) and dimethyl ether (RE 170) according to a mass ratio of 90.
Comparative example 9
The environment-friendly mixed refrigerant is prepared by physically and uniformly mixing three components, namely propylene (R1270), propane (R290) and dimethylether (RE 170), according to the mass ratio of 25 to 10, at a normal temperature and in a liquid phase.
TABLE 2 composition of ingredients of each example and comparative example
| Refrigerant composition | First component | A second component | Third component | Mass ratio of |
| Example 1 | R41 | R290 | R134a | 15:80:5 |
| Example 2 | R41 | R290 | R134a | 25:70:5 |
| Example 3 | R41 | R290 | R134a | 30:65:5 |
| Example 4 | R41 | R290 | RE170 | 45:40:15 |
| Example 5 | R41 | R290 | RE170 | 80:5:15 |
| Example 6 | R41 | R290 | RE170 | 20:70:10 |
| Example 7 | R41 | R290 | RE170 | 15:35:50 |
| Example 8 | R41 | R290 | R152a | 15:25:60 |
| Example 9 | R41 | R290 | R152a | 20:75:5 |
| Example 10 | R41 | R290 | R152a | 80:5:15 |
| Example 11 | R41 | R290 | R152a | 5:25:70 |
| Example 12 | R41 | R290 | R152a | 10:10:80 |
| Example 13 | R41 | R290 | CF3I | 40:5:55 |
| Example 14 | R41 | R290 | CF3I | 50:15:35 |
| Example 15 | R41 | R290 | CF3I | 40:20:40 |
| Example 16 | R41 | R290 | R600a | 10:80:10 |
| Example 17 | R41 | R290 | R600a | 80:5:15 |
| Example 18 | R41 | R290 | R600a | 5:55:40 |
| Example 19 | R41 | R290 | R600 | 5:80:15 |
| Example 20 | R41 | R290 | R600 | 85:5:10 |
| Example 21 | R41 | R290 | R600 | 5:70:25 |
| Example 22 | R41 | R290 | R600 | 10:85:5 |
| Comparative example 1 | R41 | R290 | R134a | 85:5:10 |
| Comparative example 2 | R41 | R290 | RE170 | 85:10:5 |
| Comparative example 3 | R41 | R290 | R152a | 75:15:10 |
| Comparative example 4 | R41 | R290 | CF3I | 75:5:20 |
| Comparative example 5 | R41 | R290 | R600a | 90:5:5 |
| Comparative example 6 | R41 | R290 | R600 | 90:5:5 |
| Comparative example 7 | R41 | R290 | R1234yf | 80:10:10 |
| Comparative example 8 | R41 | R1270 | RE170 | 90:5:5 |
| Comparative example 9 | R1270 | R290 | RE170 | 25:65:10 |
The embodiment of the invention protects the application of environment-friendly mixed refrigerant used as the refrigerant of a refrigerating system. The environment-friendly mixed refrigerant provided by each embodiment of the invention can be used as a refrigerant to be applied to a refrigerating device, the main components of the refrigerating device are a compressor, a condenser, an evaporator and an expansion device, and a heat transfer fluid working medium in a refrigerating device system is the composition obtained in the embodiment or the comparative example. The evaporator and the condenser are heat exchangers, and any type of heat exchanger, preferably with a countercurrent tendency, can be used in the present invention.
The basic parameters of the molecular weight, the normal boiling point, the critical temperature, the critical pressure, the environmental performance, the slip temperature and the like of examples 1 to 22 of the present invention, comparative examples 1 to 9 and R134a are shown in Table 3.
TABLE 3 basic parameters of the examples, comparative examples and R134a
( * Note: the slip temperature is the difference between the dew point temperature and the bubble point temperature at the working pressure )
As can be seen from Table 3, the refrigerant provided in examples 1-22 of the present invention has significantly better environmental performance than R134a, and all examples have a GWP of 150 or less. The slippage temperature of the refrigerant obtained in each embodiment is 7.4-25 ℃, small temperature difference heat exchange at each position of the heat exchanger can be realized by matching the slippage temperature with the temperature difference of the inlet and the outlet of the heat exchange medium, the irreversible loss in the heat exchange process is reduced, and the purpose of improving the energy efficiency is achieved. The mass ratio of each component in comparative examples 1-6 is not in the range provided by the embodiment of the invention, and the temperature slippage of the obtained refrigerant is smaller. Taking a non-azeotropic working medium consisting of three components R41, R290 and RE170 as an example, in the comparative examples 7-9, one of the three components is replaced, while the components of the other two components are kept unchanged, so that the energy efficiency improvement amplitude of the system is reduced compared with that of the embodiment of the application. And some of the comparative examples had GWPs greater than 150.
In order to compare the performance effects of the systems used as refrigerants in the examples and the comparative examples, the design conditions of the refrigeration device are specifically selected as follows: the inlet and outlet temperatures of the heat exchange fluid at the evaporator side are respectively 300.15K and 287.65K, the inlet and outlet temperatures of the heat exchange fluid at the condenser side are respectively 287.65K and 314.15K, the logarithmic mean temperature difference between the evaporator and the condenser is respectively 11K and 10K, the refrigerant at the outlet of the evaporator is in a superheated state, the superheat degree is 1K, the refrigerant at the outlet of the condenser is in a supercooled state, the outlet temperature is 291.15K, and the adiabatic efficiency of the compressor is 0.7. The performance parameters of the cycles performed in the refrigeration systems under the above working conditions by using the refrigerants of the above examples 1 to 22, comparative examples 1 to 9 and R134a were respectively tested and calculated, and the indexes of the discharge temperature, the compression ratio, the relative specific cooling capacity Qv (compared with the specific cooling capacity of R134 a) and the EER rise (compared with R134 a) were obtained and recorded in table 4.
As can be seen from Table 4, the thermal performance of the environment-friendly refrigerant provided by the invention is superior to that of R134a, the refrigerating capacity per unit volume is much higher than that of R134a, the filling amount of the system can be reduced, the volume of the system is reduced, and the compression ratio of the compressor can be obviously reduced by the refrigerant in each embodiment. By adopting the mixed refrigerant in the embodiment of the invention and matching with the corresponding flow path configuration, the energy efficiency of the mixed refrigerant system can be improved by 10.1-22.6% compared with that of R134 a. The EER improvement was not as great for comparative examples 1-9 as for examples 1-22. When the mass ratio and the material composition of each component substance provided by the embodiment of the invention are explained, the characteristics among the substances and the heat transfer condition of the fluid inside and outside the heat exchanger are well balanced, so that the refrigerant can be ensured to have good environmental characteristics, and the energy efficiency of the system can be effectively improved.
TABLE 4 Experimental data on System Performance for each example, comparative example, and R134a refrigerant
As can be seen from the data in tables 3 and 4, in each embodiment of the present invention, the properties of each component in the composition are fully considered, and the mass ratio of each component is defined, so as to ensure that the GWP of the environment-friendly mixed refrigerant is less than 150, and the system energy efficiency is greatly improved. Therefore, the refrigerant provided by the invention can give consideration to GWP and system energy efficiency, and becomes a good alternative scheme of the working medium with high GWP under the trend that the refrigerant is accelerated to develop towards zero ODP and low GWP.
In summary, the environment-friendly mixed refrigerant provided by the embodiments of the present invention not only has the environment-friendly characteristic of low GWP, but also has system performance equivalent to or even better than that of R134a, and can better replace R134 a.
The embodiment of the invention also correspondingly protects a refrigeration system using the environment-friendly mixed refrigerant provided by the embodiment of the invention as a working medium, the refrigeration system can be applied to electric equipment including but not limited to air conditioners, refrigerators, dehumidifiers and the like, and other components and working principles of the refrigeration system are applicable to the prior art and are not described herein again.
Some embodiments in this specification 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 above description is merely illustrative of particular embodiments of the invention that enable those skilled in the art to understand or practice the 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 (10)
1. The environment-friendly mixed refrigerant is characterized by comprising a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is one selected from 1, 2-tetrafluoroethane, dimethylether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150.
2. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is 1, 2-tetrafluoroethane, and the environment-friendly mixed refrigerant comprises, in mass%, 15 to 30% of monofluoromethane, 65 to 80% of propane, and 5% of 1, 2-tetrafluoroethane.
3. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is dimethylether, and the environment-friendly mixed refrigerant comprises, by mass, 15 to 80% of monofluoromethane, 5 to 70% of propane, and 10 to 50% of dimethylether.
4. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is 1, 1-difluoroethane, and the environment-friendly mixed refrigerant comprises, in mass%, 5 to 80% of monofluoromethane, 5 to 75% of propane, and 5 to 80% of 1, 1-difluoroethane.
5. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is trifluoroiodomethane, and the environment-friendly mixed refrigerant comprises, in mass percent, 40-50% of monofluoromethane, 5-20% of propane, and 35-55% of trifluoroiodomethane.
6. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is isobutane, and the environment-friendly mixed refrigerant comprises, by mass, 5-80% of monofluoromethane, 5-80% of propane, and 10-40% of isobutane.
7. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is n-butane, and the environment-friendly mixed refrigerant comprises, in mass percent, 5-85% of monofluoromethane, 5-85% of propane, and 5-25% of n-butane.
8. The method for preparing the environment-friendly mixed refrigerant as recited in any one of claims 1 to 7, wherein said method comprises the steps of: and mixing and stirring the components of the environment-friendly mixed refrigerant in a normal-temperature normal-pressure liquid-phase state to obtain the environment-friendly mixed refrigerant.
9. Use of the environment-friendly mixed refrigerant according to any one of claims 1 to 7 for a refrigeration system.
10. A refrigeration system comprising a working fluid, wherein the working fluid comprises the environmentally friendly mixed refrigerant of any one of claims 1 to 7.
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