CN113549427A - Environment-friendly mixed refrigeration working medium, refrigerant and refrigeration system - Google Patents
Environment-friendly mixed refrigeration working medium, refrigerant and refrigeration system Download PDFInfo
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Abstract
The invention provides an environment-friendly mixed refrigerant and a refrigeration system. The environment-friendly mixed refrigerant comprises the following components in percentage by mass: 15-35% of fluoroethane; 41-80% of trifluoropropene; 1-30% of trifluoromethyl methyl ether. The environment-friendly mixed refrigerant has the advantages that the components of the environment-friendly mixed refrigerant are synergistic, so that the mixed refrigerant has a low GWP value, and the trifluoromethyl ether (RE143a) also has excellent flame retardant property and belongs to the A1 flammability grade, so that the flammability of the environment-friendly mixed refrigerant can be weakened by adding the trifluoromethyl ether (RE143a), and the environment-friendly mixed refrigerant is further good in safety performance, the mixed refrigerant can obtain volume refrigerating capacity and energy efficiency similar to that of R134a by adopting the mixed refrigerant for refrigeration, and the problem that the GWP value of the existing refrigerant (R134a) is high is solved.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to an environment-friendly mixed refrigeration working medium, a refrigerant and a refrigeration system.
Background
With the increasing global warming, the environmental protection problem is more and more emphasized, and a plurality of countries in the world 170 jointly sign Montreal protocol-Bulgarian amendments with legal constraints. The protocol is officially effective in 2019, 1 month and 1 day, so that a refrigerant which does not damage the ozone layer and has a low GWP value is required to complete the replacement and conversion work, and is effectively applied to an air conditioning system.
At present, R134a used by an automobile air conditioner has good thermal performance, ODP (ozone potential value) is 0, but because the GWP is 1430, the GWP is in a controlled range based on a California correction scheme, and the gradual elimination is a necessary trend, so that the search for a working medium which meets the requirements of environmental protection and the energy efficiency of the capacity of an automobile air conditioning system is urgent.
At present, the main international technical means are that replacement research of novel low GWP value refrigerants is carried out from the perspective of single working substances and refrigerant compositions, and the refrigerant composition is mainly a novel HFCs substitute, a Hydrofluoroolefin (HFOs) substitute and a hydrocarbon refrigerant natural working substance, and a proper composition is sought to meet the requirements of automobile air conditioners on the refrigerants.
For example, chinese patent application CN101765648A discloses a mixture of 1,2,3,3, 3-pentafluoropropene (HFO-1225ye) and other compounds. Chinese patent application CN101851490A discloses a mixture of 2,3,3, 3-tetrafluoropropene (HFO-1234yf), trans-1,3,3, 3-tetrafluoroethane (HFC-1234ze (e)), and 1, 1-difluoroethane (HFC-152 a). Chinese patent application CN101864277A discloses a mixture of 2,3,3, 3-tetrafluoropropene (HFO-1234yf), 1-difluoroethane (HFC-152a) and dimethyl ether (DME). Chinese patent application CN102066518A discloses a mixture of 2,3,3, 3-tetrafluoropropene (HFO-1234yf), 1,1,1, 2-tetrafluoroethane (HFC-134a) and 1, 1-difluoroethane (HFC-152 a).
The refrigerant compositions disclosed in the above-mentioned patent applications suffer from disadvantages of relatively high GWP or high flammability, and therefore, there is a need to develop new refrigerants having better refrigeration performance, better compatibility with existing systems, and safer, environmentally friendly properties.
Disclosure of Invention
The invention mainly aims to provide an environment-friendly mixed refrigerant, a refrigerant and a refrigeration system, so as to solve the problem that the refrigerant composition in the prior art has high GWP or high flammability.
In order to achieve the above object, according to one aspect of the present invention, there is provided an environment-friendly mixed refrigerant comprising, by mass: 15-35% of fluoroethane; 41-80% of trifluoropropene; 1-30% of trifluoromethyl methyl ether.
Further, the environment-friendly mixed refrigerant comprises the following components in percentage by mass: 25-35% of fluoroethane; 45-70% of trifluoropropene; 1-30% of trifluoromethyl methyl ether.
Further, the environment-friendly mixed refrigerant comprises the following components in percentage by mass: 25-35% of fluoroethane; 50-60% of trifluoropropene; 5-20% of trifluoromethyl methyl ether.
Further, the environment-friendly mixed refrigerant comprises the following components in percentage by mass: 26-33% of fluoroethane; 52-56% of trifluoropropene; 14-18% of trifluoromethyl methyl ether.
Further, the environment-friendly mixed refrigerant comprises 26% of fluoroethane, 56% of trifluoropropene and 18% of trifluoromethyl methyl ether by mass percent; or the environment-friendly mixed refrigerant comprises 28 percent of fluoroethane, 56 percent of trifluoropropene and 16 percent of trifluoromethyl methyl ether by mass percentage; or the environment-friendly mixed refrigerant comprises 30% of fluoroethane, 52% of trifluoropropene and 18% of trifluoromethyl methyl ether by mass percent; or the environment-friendly mixed refrigerant comprises 33% of fluoroethane, 53% of trifluoropropene and 14% of trifluoromethyl methyl ether by mass percent.
According to another aspect of the invention, a refrigerant is provided, which comprises a refrigerant working medium, wherein the refrigerant working medium is any one of the environment-friendly mixed refrigerant working media.
Further, the refrigerant includes any one or more of a lubricant, a solubilizer, and a dispersant.
Further, the lubricant is selected from any one or more of mineral oil, silicone oil and polyol ester.
According to another aspect of the present invention, there is provided a refrigeration system comprising an evaporator, a condenser, a compressor, and a throttling element, the evaporator, the condenser, the compressor, and the throttling element being connected by a closed circuit, the closed circuit having a refrigerant therein, the refrigerant being any one of the above-mentioned refrigerants.
Further, the refrigeration system is an automobile air conditioning system.
By applying the technical scheme of the invention, the components of the environment-friendly mixed refrigerant have a lower GWP value through synergistic action, and the trifluoromethyl methyl ether (RE143a) also has excellent flame retardant property and belongs to A1 flammability class, so that the flammability of the environment-friendly mixed refrigerant can be weakened by adding the trifluoromethyl methyl ether (RE143a), and the environment-friendly mixed refrigerant becomes a mixed refrigerant with good safety performance, the volume refrigerating capacity and energy efficiency which are similar to those of R134a can be obtained by adopting the mixed refrigerant for refrigeration, and the problem of higher GWP value of the existing refrigerant (R134a) is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic view of a compression refrigeration cycle system of a refrigeration system according to the present invention.
Wherein the figures include the following reference numerals:
1. a compressor; 2. a condenser; 3. an evaporator; 4. a throttling element.
Detailed Description
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 present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As analyzed in the background of the present application, the prior art refrigerant compositions have problems of high GWP or greater flammability. In order to solve the problem, the application provides an environment-friendly mixed refrigerant, a refrigerant and a refrigeration system.
In an exemplary embodiment of the present application, an environment-friendly mixed refrigerant is provided, which includes, by mass: 15-35% fluoroethane (R161), 45-80% trifluoropropene (R1243zf) and 1-30% trifluoromethyl methyl ether (RE143 a).
The environment-friendly mixed refrigerant has the advantages that through synergistic effect of all components, the mixed refrigerant has a low GWP value, and the trifluoromethyl methyl ether (RE143a) also has excellent flame retardant property and belongs to the A1 flammability grade, so that the flammability of the environment-friendly mixed refrigerant can be weakened by adding the trifluoromethyl methyl ether (RE143a), and the environment-friendly mixed refrigerant becomes a mixed refrigerant with good safety performance, the mixed refrigerant can be used for refrigeration to obtain volume refrigerating capacity and energy efficiency similar to that of R134a, and the problem that the GWP value of the existing refrigerant (R134a) is high is solved.
Therefore, the environment-friendly mixed refrigerant has the advantages of ODP value of 0, low GWP value, low flammability, good cycle performance and working pressure similar to that of R134a, can be directly used on the premise of not changing main devices, can further solve the problem of high GWP value of the conventional R134a refrigerant, and can be used as a long-term alternative refrigerant of R134a for an automobile air-conditioning refrigeration system.
In some embodiments of the present application, in order to further reduce the flammability of the environment-friendly mixed refrigerant, the environment-friendly mixed refrigerant includes, by mass: 25-35% of fluoroethane, 45-70% of trifluoropropene and 1-30% of trifluoromethyl methyl ether. Preferably, the environment-friendly mixed refrigerant comprises the following components in percentage by mass: 25-35% of fluoroethane, 50-60% of trifluoropropene and 5-20% of trifluoromethyl methyl ether. Further preferably, the environment-friendly mixed refrigerant comprises, by mass: 26-33% of fluoroethane, 52-56% of trifluoropropene and 14-18% of trifluoromethyl methyl ether.
In some embodiments, the environment-friendly mixed refrigerant comprises, by mass, 26% of fluoroethane, 56% of trifluoropropene and 18% of trifluoromethyl methyl ether; or the environment-friendly mixed refrigerant comprises 28 mass percent of fluoroethane, 56 mass percent of trifluoropropene and 16 mass percent of trifluoromethyl methyl ether; or the environment-friendly mixed refrigerant comprises 30% of fluoroethane, 52% of trifluoropropene and 18% of trifluoromethyl methyl ether by mass percent; or the environment-friendly mixed refrigerant comprises 33% of fluoroethane, 53% of trifluoropropene and 14% of trifluoromethyl methyl ether by mass percent.
In another exemplary embodiment of the present application, a refrigerant is provided, wherein the refrigerant includes a refrigerant working medium, and the refrigerant working medium is the environment-friendly mixed refrigerant.
In order to improve the fluidity of the environment-friendly mixed refrigerant in application and the applicability of the system, the refrigerant preferably comprises any one or more of a lubricant, a solubilizer and a dispersant. In order to further reduce the flame retardance of the environment-friendly mixed refrigerant, the lubricant is preferably selected from one or more of mineral oil, silicone oil and polyol ester.
In another exemplary embodiment of the present application, a refrigeration system is provided, which includes an evaporator 3, a condenser 2, a compressor 1, and a throttling element 4, wherein the evaporator 3, the condenser 2, the compressor 1, and the throttling element 4 are connected by a closed circuit, and the closed circuit has a refrigerant, and the refrigerant is any one of the above refrigerants.
The refrigerating system of this application adopts present conventional refrigerating system's structure can, this refrigerating system's compression refrigeration cycle system principle is as shown in figure 1, and the mixed refrigerant of low pressure carries out the heat transfer at evaporimeter 3 and room air and releases cold volume, and later low pressure gaseous state refrigerant gets into compressor 1 and is compressed to the high-temperature highly compressed gaseous state, carries out the heat transfer through condenser 2 and outdoor air and releases the heat, and the condensation is highly compressed liquid refrigerant, and the throttle is gas-liquid two-phase attitude low pressure refrigerant through throttling element 4 again. The refrigerant replaces R134a refrigerant, and exchanges heat, is compressed and throttled in the single-stage compression automobile air conditioner.
The adopted refrigerant comprises the environment-friendly mixed refrigerant, and the environment-friendly mixed refrigerant has the advantages of ODP value of 0, low GWP value, good cycle performance and working pressure close to R134a, so that the problem of high GWP value of the conventional R134a refrigerant can be solved when the refrigerant is applied to a refrigeration system. The refrigeration system may be an automotive air conditioning system.
The advantageous effects of the present application will be further described below with reference to examples and comparative examples.
When the combination mode is determined, the environment-friendly mixed refrigerant is subjected to liquid-phase physical mixing at the temperature of 23-27 ℃ and the pressure of 0.1MP according to the corresponding mass ratio, and the environment-friendly mixed refrigerant is obtained after uniform mixing. The basic parameters of the component materials are shown in Table 1.
TABLE 1 basic parameters of the component materials in the refrigerant compositions
Specific examples are given below in which the proportions of the components are all mass percent, and the sum of the mass percent of the components of each refrigerant composition is 100%.
Example 1:
reacting R161, R1243zf and RE143a in liquid phase at 15: 57: 28 percent by mass.
Example 2:
r161, R1243zf and RE143a in liquid phase at 20: 52: 28 percent by mass.
Example 3:
r161, R1243zf and RE143a in liquid phase at 20: 55: 25 percent by mass.
Example 4:
r161, R1243zf and RE143a in liquid phase at 23: 55: 22 mass percent.
Example 5:
reacting R161, R1243zf and RE143a in liquid phase at 24: 50: 26 percent by mass.
Example 6:
r161, R1243zf and RE143a in liquid phase at 25: 48: 27 mass percent was physically mixed.
Example 7:
r161, R1243zf and RE143a in liquid phase at 28: 50: 22 mass percent.
Example 8:
r161, R1243zf and RE143a in liquid phase at 32: 41: 27 mass percent was physically mixed.
Example 9:
reacting R161, R1243zf and RE143a in liquid phase at 26: 56: 18 mass percent.
Example 10:
r161, R1243zf and RE143a in liquid phase at 28: 56: 16 percent by mass.
Example 11:
r161, R1243zf and RE143a in liquid phase at 30: 52: 18 mass percent.
Example 12:
r161, R1243zf and RE143a in liquid phase at 33: 53: 14 mass percent was physically mixed.
Example 13:
reacting R161, R1243zf and RE143a in liquid phase at 35: 45: 20 percent by mass.
Example 14:
r161, R1243zf and RE143a in liquid phase at 19: 80: 1 mass percent.
Example 15:
r161, R1243zf and RE143a in liquid phase at 25: 70: 5 percent by mass.
Example 16:
r161, R1243zf and RE143a in liquid phase at 20: 60: 20 percent by mass.
Example 17
R161, R1243zf and RE143a in liquid phase at 20: 50: 30 mass percent.
Comparative example 1:
r134a, R1243zf and RE143a were mixed in liquid phase at 20: 60: 20 percent by mass.
Comparative example 2:
r134a, R1243zf and RE143a were mixed in liquid phase at 28: 56: 16 percent by mass.
The performance parameters of the mixed working media in examples 1-17 are shown in Table 2.
TABLE 2 basic thermophysical parameters of refrigerant compositions
Note: the slip temperature is 0.1MPa, and the difference between the bubble point temperature and the dew point temperature is obtained.
As can be seen from table 2, the refrigerant composition provided by the present invention has a GWP of less than 160, has the advantages of more obvious environmental protection compared with R134a, and has a molecular weight less than R134a, so that the refrigerant composition has better fluidity, and is helpful for prolonging the service life of a compressor; the boiling point, the critical temperature and the critical pressure are similar to those of R134a, and the product can be used as a long-term substitute of R134 a. The sliding temperature of the mixed refrigerant is lower than 2 ℃, and the mixed refrigerant belongs to a near azeotropic mixture, thereby eliminating the adverse effect caused by temperature sliding.
Examples 14 and 15 had a small GWP, but had a large slip temperature and a large adverse effect.
In the refrigeration condition (i.e., the evaporation temperature is 10 ℃, the condensation temperature is 45 ℃, the superheat degree is 3 ℃, the supercooling degree is 7 ℃, and the adiabatic efficiency of the compressor is 0.7), the comparison results of the thermodynamic parameters (i.e., the compression ratio and the exhaust temperature) and the relative thermodynamic properties (i.e., the relative refrigerating capacity per unit volume and the relative efficiency COP) of the above examples 1 to 17 and R134a are shown in table 3.
TABLE 3 comparison of refrigerant compositions with the thermal performance of R134a
It can be seen from table 3 that the evaporation pressure and the condensation pressure are similar to R134 a. A pressure ratio lower than R134a reduces compressor power consumption and benefits long-term compressor operation. The coefficient of performance COP of the whole system is equivalent to the performance of R134a with the refrigerating capacity per unit volume. Examples 14 to 16 all had relative qv less than 1 and slightly lower refrigeration capacity.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the environment-friendly mixed refrigerant has the advantages that through synergistic effect of all components, the mixed refrigerant has a low GWP value, and the trifluoromethyl methyl ether (RE143a) also has excellent flame retardant property and belongs to the A1 flammability grade, so that the flammability of the environment-friendly mixed refrigerant can be weakened by adding the trifluoromethyl methyl ether (RE143a), and the environment-friendly mixed refrigerant becomes a mixed refrigerant with good safety performance, the mixed refrigerant can be used for refrigeration to obtain volume refrigerating capacity and energy efficiency similar to that of R134a, and the problem that the GWP value of the existing refrigerant (R134a) is high is solved.
Therefore, the environment-friendly mixed refrigerant has the advantages of ODP value of 0, low GWP value, low flammability, good cycle performance and working pressure similar to that of R134a, can be directly used on the premise of not changing main devices, can further solve the problem of high GWP value of the conventional R134a refrigerant, and can be used as a long-term alternative refrigerant of R134a for an automobile air-conditioning refrigeration system.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The environment-friendly mixed refrigerant is characterized by comprising the following components in percentage by mass:
15-35% of fluoroethane;
41-80% of trifluoropropene;
1-30% of trifluoromethyl methyl ether.
2. The environment-friendly mixed refrigerant according to claim 1, wherein the environment-friendly mixed refrigerant comprises, in mass percent:
25-35% of fluoroethane;
45-70% of trifluoropropene;
1-30% of trifluoromethyl methyl ether.
3. An environment-friendly mixed refrigerant as claimed in claim 2, wherein the environment-friendly mixed refrigerant comprises, in mass percent:
25-35% of fluoroethane;
50-60% of trifluoropropene;
5-20% of trifluoromethyl methyl ether.
4. The environment-friendly mixed refrigerant according to claim 3, wherein the environment-friendly mixed refrigerant comprises, in mass percent:
26-33% of fluoroethane;
52-56% of trifluoropropene;
14-18% of trifluoromethyl methyl ether.
5. The environmentally friendly mixed refrigerant of claim 3, wherein the environmentally friendly mixed refrigerant comprises, in mass percent, 26% of the fluoroethane, 56% of the trifluoropropene, and 18% of the trifluoromethyl methyl ether;
or the environment-friendly mixed refrigerant comprises 28 mass percent of fluoroethane, 56 mass percent of trifluoropropene and 16 mass percent of trifluoromethyl methyl ether;
or the environment-friendly mixed refrigerant comprises 30% of fluoroethane, 52% of trifluoropropene and 18% of trifluoromethyl methyl ether by mass percentage;
or the environment-friendly mixed refrigerant comprises 33% of fluoroethane, 53% of trifluoropropene and 14% of trifluoromethyl methyl ether by mass percent.
6. A refrigerant comprising a refrigerant, characterized in that the refrigerant is the environment-friendly mixed refrigerant of any one of claims 1 to 5.
7. The refrigerant according to claim 6, further comprising any one or more of a lubricant, a solubilizer, and a dispersant.
8. The refrigerant according to claim 7, wherein the lubricant is selected from any one or more of mineral oil, silicone oil, and polyol ester.
9. A refrigerating system, comprising an evaporator, a condenser, a compressor and a throttling element, wherein the evaporator, the condenser, the compressor and the throttling element are connected through a closed loop, a refrigerant is arranged in the closed loop, and the refrigerant is the environment-friendly mixed refrigerant as claimed in any one of claims 6 to 8.
10. The refrigeration system of claim 9 wherein the refrigeration system is a vehicle air conditioning system.
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| CN110878194A (en) * | 2019-10-16 | 2020-03-13 | 珠海格力电器股份有限公司 | R13I 1-containing environment-friendly mixed refrigerant and heat exchange system |
| CN110878195A (en) * | 2019-10-16 | 2020-03-13 | 珠海格力电器股份有限公司 | Coolant containing trifluoroiodomethane, mixture containing coolant and heat exchange system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114181664A (en) * | 2021-12-09 | 2022-03-15 | 珠海格力电器股份有限公司 | Environment-friendly mixed refrigeration working medium, refrigerant and refrigeration system |
| CN114181664B (en) * | 2021-12-09 | 2022-09-23 | 珠海格力电器股份有限公司 | Environment-friendly mixed refrigeration working medium, refrigerant and refrigeration system |
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