CN113845882A - Ternary environment-friendly mixed refrigerant, preparation method thereof and refrigeration system - Google Patents

Ternary environment-friendly mixed refrigerant, preparation method thereof and refrigeration system Download PDF

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CN113845882A
CN113845882A CN202111227285.9A CN202111227285A CN113845882A CN 113845882 A CN113845882 A CN 113845882A CN 202111227285 A CN202111227285 A CN 202111227285A CN 113845882 A CN113845882 A CN 113845882A
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mixed refrigerant
monofluoromethane
fluoroethane
friendly mixed
ternary
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CN113845882B (en
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徐璐
梁祥飞
黄泽清
皇甫启捷
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Gree Electric Appliances Inc of Zhuhai
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    • 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
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Abstract

The application relates to the technical field of refrigerants, in particular to a ternary environment-friendly mixed refrigerant, a preparation method of the ternary environment-friendly mixed refrigerant and a refrigeration system. The ternary 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 fluoroethane, and the third component is one of n-butane, dimethylether, isobutane, 2,3,3, 3-tetrafluoropropene, trans-1, 3,3, 3-tetrafluoropropene, tetrafluoroethane, 1, 1-difluoroethane, and 1,1,1,3, 3-pentafluoropropane. The ternary environment-friendly mixed refrigerant has good environmental protection performance, and GWP is less than or equal to 500; and the obtained non-azeotropic mixed working medium is accompanied with temperature change phenomenon in the phase change process, so that the irreversible loss of heat transfer caused by the heat exchange temperature difference with the heat exchange fluid can be reduced, the system circulation is close to Lorenz circulation, and the purposes of saving energy and improving efficiency are achieved.

Description

Ternary environment-friendly mixed refrigerant, preparation method thereof and refrigeration system
Technical Field
The application relates to the technical field of refrigerants, in particular to a ternary environment-friendly mixed refrigerant, a preparation method of the ternary 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 montreal protocol and the kyoto protocol, the next generation refrigerant should have zero ODP, low GWP characteristics. At present, HFCs refrigerants R134a, 410A, R134a, R404A, R407C and the like widely applied to the refrigeration and air-conditioning industry have high warming potential values (GWP is more than or equal to 1300), so that alternative working media with excellent environmental protection performance are urgently needed to be found. Under the condition of comprehensively considering parameters such as physical properties, cost, flammability and the like of the refrigerant, a better alternative scheme is not found in pure working media at present, and the mixed refrigerant can balance the characteristics of all refrigerants, so that the research on the mixed refrigerant becomes a hotspot of refrigerant research.
The currently used refrigerant faces severe reduction due to high GWP, but at present, a perfect alternative scheme is not available in the field of pure working media. Besides the requirement of environmental protection, the substitute refrigerant also needs to meet the energy saving property, so that the energy efficiency of the system is improved.
Disclosure of Invention
In order to solve the technical problem of poor environment-friendly performance of the refrigerant in the prior art, the invention aims to provide an environment-friendly mixed refrigerant which has good environment performance, extremely low GWP, and can meet the requirement of energy conservation and improve the system energy efficiency.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a ternary environment-friendly mixed refrigerant.
The ternary 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 fluoroethane, and the third component is one of n-butane, dimethylether, isobutane, 2,3,3, 3-tetrafluoropropene, trans-1, 3,3, 3-tetrafluoropropene, tetrafluoroethane, 1, 1-difluoroethane, and 1,1,1,3, 3-pentafluoropropane.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 10-60% of monofluoromethane, 35-70% of fluoroethane and 5-30% of n-butane.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 20-60% of monofluoromethane, 15-65% of fluoroethane and 5-65% of dimethylether.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 15-55% of monofluoromethane, 35-65% of fluoroethane and 5-35% of isobutane.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 20-55% of monofluoromethane, 30-65% of fluoroethane and 5-40% of 2,3,3, 3-tetrafluoropropene.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 20-55% of monofluoromethane, 35-65% of fluoroethane and 5-40% of trans-1, 3,3, 3-tetrafluoropropene.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 20-55% of monofluoromethane, 30-65% of fluoroethane and 5-30% of 1,1,1, 2-tetrafluoroethane.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 15-55% of monofluoromethane, 15-65% of fluoroethane and 5-70% of 1, 1-difluoroethane.
Further, the ternary environment-friendly mixed refrigerant comprises, by mass, 5-55% of monofluoromethane, 40-75% of fluoroethane and 5-30% of 1,1,1,3, 3-pentafluoropropane.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a method for preparing a ternary environment-friendly mixed refrigerant, for preparing the ternary environment-friendly mixed refrigerant provided in the first aspect of the embodiments of the present invention, the method comprising the steps of: and mixing and stirring the components of the ternary environment-friendly mixed refrigerant in a normal-temperature liquid-phase state according to corresponding mass ratio to obtain the ternary environment-friendly mixed refrigerant.
In order to achieve the above object, according to a third aspect of the present invention, there is also provided a refrigeration system, including a working medium, where the working medium includes the ternary environment-friendly mixed refrigerant provided in the first aspect of the embodiments of the present invention.
The ternary environment-friendly mixed refrigerant provided by the embodiment of the invention has good environmental protection performance, and GWP is less than or equal to 500; and the obtained non-azeotropic mixed working medium is accompanied with temperature change phenomenon in the phase change process, so that the irreversible loss of heat transfer caused by the heat exchange temperature difference with the heat exchange fluid can be reduced, the system circulation is close to Lorenz circulation, and the purposes of saving energy and improving efficiency are achieved.
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, 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.
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 appropriate.
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 in a normal-temperature liquid-phase state according to the corresponding mass ratio, and the multi-component mixture can be mixed and stirred in the normal-temperature liquid-phase state to prepare the environment-friendly mixed refrigerant. The basic parameters of each component 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
Figure BDA0003314634500000041
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 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
The three components of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) are physically and uniformly mixed at the normal temperature and liquid phase according to the mass ratio of 45:50:5 to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) is 100%.
Example 2
The three components of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) are physically and uniformly mixed at the normal temperature and liquid phase according to the mass ratio of 50:40:10 to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) is 100%.
Example 3
The three components of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) are physically and uniformly mixed at the normal temperature and liquid phase according to the mass ratio of 10:70:20 to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) is 100%.
Example 4
The three components of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) are physically and uniformly mixed at the normal temperature and liquid phase according to the mass ratio of 60:35:5 to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) is 100%.
Example 5
The three components of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) are physically and uniformly mixed at the normal temperature and liquid phase according to the mass ratio of 10:60:30 to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of the monofluoromethane (R41), the fluoroethane (R161) and the n-butane (R600) is 100%.
Example 6
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) according to the mass ratio of 40:55:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) is 100%.
Example 7
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) according to the mass ratio of 60:15:25 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) is 100%.
Example 8
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) according to the mass ratio of 30:65:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) is 100%.
Example 9
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) according to the mass ratio of 20:15:65 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) is 100%.
Example 10
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) according to the mass ratio of 40:55:5 at a normal temperature liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) is 100%.
Example 11
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) according to the mass ratio of 50:35:15 at a normal temperature liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) is 100%.
Example 12
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) according to the mass ratio of 15:50:35 at a normal temperature liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) is 100%.
Example 13
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) according to the mass ratio of 55:40:5 at a normal temperature liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) is 100%.
Example 14
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) according to the mass ratio of 30:65:5 at a normal temperature liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) is 100%.
Example 15
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) according to the mass ratio of 30:60:10 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) is 100%.
Example 16
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) according to the mass ratio of 20:45:35 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) is 100%.
Example 17
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) according to the mass ratio of 55:30:15 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) is 100%.
Example 18
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) according to the mass ratio of 30:65:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) is 100%.
Example 19
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) at a mass ratio of 25:35:40 under a normal temperature liquid phase to obtain a ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) is 100%.
Example 20
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) according to the mass ratio of 35:55:10 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) is 100%.
Example 21
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) according to the mass ratio of 50:35:15 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) is 100%.
Example 22
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) according to the mass ratio of 20:40:40 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) is 100%.
Example 23
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) according to the mass ratio of 55:35:10 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) is 100%.
Example 24
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) according to the mass ratio of 30:65:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) is 100%.
Example 25
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) according to the mass ratio of 40:55:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) is 100%.
Example 26
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) according to the mass ratio of 45:30:25 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) is 100%.
Example 27
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) at a mass ratio of 20:50:30 at normal temperature to obtain a ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) is 100%.
Example 28
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) according to the mass ratio of 55:30:15 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) is 100%.
Example 29
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) according to the mass ratio of 30:65:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) is 100%.
Example 30
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) according to the mass ratio of 40:55:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) is 100%.
Example 31
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) according to the mass ratio of 55:20:25 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) is 100%.
Example 32
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) according to the mass ratio of 30:65:5 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) is 100%.
Example 33
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) according to the mass ratio of 15:15:70 at normal temperature and liquid phase to obtain the ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) is 100%.
Example 34
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) according to the mass ratio of 10:75:15 at normal temperature and liquid phase to obtain a ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) is 100%.
Example 35
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) according to the mass ratio of 5:70:25 at normal temperature and liquid phase to obtain a ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) is 100%.
Example 36
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) according to the mass ratio of 55:40:5 at normal temperature and liquid phase to obtain a ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) is 100%.
Example 37
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) according to the mass ratio of 5:65:30 at normal temperature and liquid phase to obtain a ternary environment-friendly mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) is 100%.
Comparative example 1
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and n-butane (R600) at a mass ratio of 45:30:25 at a normal temperature liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and n-butane (R600) is 100%.
Comparative example 2
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) according to a mass ratio of 90:5:5 at a normal temperature liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and dimethyl ether (RE170) is 100%.
Comparative example 3
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) according to the mass ratio of 35:25:40 at a normal temperature liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and isobutane (R600a) is 100%.
Comparative example 4
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) according to a mass ratio of 90:5:5 at a normal temperature and liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 2,3,3, 3-tetrafluoropropene (R1234yf) is 100%.
Comparative example 5
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) according to the mass ratio of 20:5:75 at the normal temperature and in a liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) is 100%.
Comparative example 6
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) at a mass ratio of 85:5:10 under a normal-temperature liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1, 2-tetrafluoroethane (R134a) is 100%.
Comparative example 7
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) at a mass ratio of 90:5:5 at normal temperature in a liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1, 1-difluoroethane (R152a) is 100%.
Comparative example 8
Uniformly and physically mixing monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) at a mass ratio of 70:5:25 under a normal-temperature liquid phase to obtain a ternary mixed refrigerant, wherein the sum of the mass percentages of monofluoromethane (R41), fluoroethane (R161) and 1,1,1,3, 3-pentafluoropropane (R245fa) is 100%.
TABLE 2 composition of ingredients of each example and comparative example
Figure BDA0003314634500000141
Figure BDA0003314634500000151
The embodiment of the invention also relates to the application of the ternary environment-friendly mixed refrigerant in a refrigeration system, wherein the refrigeration system comprises main components of a compressor, a condenser, an evaporator and an expansion device, and the heat transfer fluid in the system is the refrigerant contained in the embodiment or the comparative example. The evaporator and the condenser are heat exchangers, and any type of heat exchanger can be used in the present invention, and in particular parallel flow heat exchangers, or preferably heat exchangers with a tendency to counter-flow.
Table 3 compares the refrigerants obtained in the above examples 1 to 37 and comparative examples 1 to 8 with the basic parameters of R134a, such as molecular weight, normal boiling point and environmental properties.
TABLE 3 basic parameters of examples, comparative examples, R134a
Figure BDA0003314634500000152
Figure BDA0003314634500000161
(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 environmental performance of the mixed refrigerant provided by the present invention is better than R134a, the GWP of all examples is less than or equal to 500, and the GWPs of the other examples are less than 150 except for examples 26, 27, 28, 35 and 37; the sliding temperature of the mixed working medium is 13.8-22.8 ℃, small-temperature-difference heat exchange at each position of the heat exchanger can be realized by matching the sliding temperature with the inlet-outlet temperature difference 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 to 8 is out of the range provided by the invention, and the temperature slip of the obtained refrigerant is larger or smaller.
In order to compare the system performance of each example with that of the comparative example, the design conditions of the refrigeration system selected are specifically 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 an overheated 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 refrigerants obtained in the above examples 1 to 37 and comparative examples 1 to 8 in the refrigeration system were tested and calculated, and the indexes of the discharge temperature, the compression ratio, the relative refrigerating capacity per unit volume (the ratio to the refrigerating capacity per unit volume of the R134a refrigerant), the EER increase amplitude, etc. were compared and recorded in table 4.
TABLE 4 System Performance parameters for examples, comparative examples, R134a
Figure BDA0003314634500000171
Figure BDA0003314634500000181
As can be seen from Table 4, the thermal performance of the mixed working medium provided by the invention is superior to that of R134a, the volumetric refrigerating capacity is much higher than that of R134a, and the compressor with smaller displacement can be selected under the same requirement, so that the volume of the compressor is reduced, and the compression ratio of the compressor can be obviously reduced by the mixed working medium. 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 14.8-16.7% compared with that of R134 a. The EER improvement amplitudes of comparative examples 1 to 8 are not equal to those of the examples, and only when the mass ratio and the material composition of the substances are adopted in the invention, the characteristics among the substances and the heat transfer conditions of the fluid at the inner side and the outer side of the heat exchanger are well balanced, so that the refrigerant can have good environmental characteristics, and the energy efficiency of the system can be effectively 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.
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 appliances 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 foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice 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 (11)

1. A ternary environment-friendly mixed refrigerant, which is characterized by comprising a first component, a second component and a third component, wherein: the first component is monofluoromethane, the second component is fluoroethane, and the third component is one of n-butane, dimethylether, isobutane, 2,3,3, 3-tetrafluoropropene, trans-1, 3,3, 3-tetrafluoropropene, 1,1,1, 2-tetrafluoroethane, 1, 1-difluoroethane, and 1,1,1,3, 3-pentafluoropropane.
2. The ternary environment-friendly mixed refrigerant according to claim 1, comprising 10 to 60% of monofluoromethane, 35 to 70% of fluoroethane and 5 to 30% of n-butane in mass%.
3. The ternary environment-friendly mixed refrigerant as claimed in claim 1, comprising 20-60% of monofluoromethane, 15-65% of fluoroethane and 5-65% of dimethylether by mass%.
4. The ternary environment-friendly mixed refrigerant according to claim 1, comprising 15-55% of monofluoromethane, 35-65% of fluoroethane and 5-35% of isobutane in percentage by mass.
5. The ternary environment-friendly mixed refrigerant according to claim 1, comprising 20 to 55% of monofluoromethane, 30 to 65% of fluoroethane and 5 to 40% of 2,3,3, 3-tetrafluoropropene in percentage by mass.
6. The ternary environment-friendly mixed refrigerant according to claim 1, comprising 20 to 55% of monofluoromethane, 35 to 65% of fluoroethane and 5 to 40% of trans-1, 3,3, 3-tetrafluoropropene in percentage by mass.
7. The ternary environment-friendly mixed refrigerant according to claim 1, comprising 20 to 55% of monofluoromethane, 30 to 65% of fluoroethane and 5 to 30% of 1,1,1, 2-tetrafluoroethane by mass%.
8. The ternary environment-friendly mixed refrigerant according to claim 1, comprising 15 to 55% by mass of monofluoromethane, 15 to 65% by mass of fluoroethane and 5 to 70% by mass of 1, 1-difluoroethane.
9. The ternary environment-friendly mixed refrigerant according to claim 1, comprising 5 to 55% of monofluoromethane, 40 to 75% of fluoroethane and 5 to 30% of 1,1,1,3, 3-pentafluoropropane by mass%.
10. A method for preparing the ternary environment-friendly mixed refrigerant as recited in any one of claims 1 to 9, characterized in that the method comprises the following steps: and mixing and stirring the components of the ternary environment-friendly mixed refrigerant in a normal-temperature liquid-phase state according to corresponding mass ratio to obtain the ternary environment-friendly mixed refrigerant.
11. A refrigeration system comprising a working fluid, wherein the working fluid comprises the ternary environment-friendly mixed refrigerant of any one of claims 1 to 9.
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