Refrigerant and method for preparing the same

Abstract

The present application provides a refrigerant and a method for preparing the same. The refrigerant is composed of a first component, a second component and a third component, wherein: the first component is 3,3,3-trifluoropropyne; the second component is trifluoroiodomethane; the third component is one of 2,3,3,3-tetrafluoropropylene or trans-1,3,3,3-tetrafluoropropylene; in the refrigerant, the content of the first component is a first preset value, the content of the second component is a second preset value, and the content of the third component is a third preset value; satisfying: the first preset value, the second preset value and the third preset value are all greater than zero, and the sum is 100%. The present application is a refrigerant composed of three components, with a GWP far less than 150, and has obvious environmental advantages; its refrigerant thermal performance and unit volume refrigeration capacity are similar to R290, so it can replace R290, its flammability is greatly reduced, and its safety is significantly improved, which is better than the safety level of R290.

Description

Technical Field

[0001] The present application belongs to the technical field of refrigerants, and specifically relates to a refrigerant and a preparation method thereof. Background Art

[0002] Global warming potential (GWP) and low ozone depletion potential (ODP) are two important indicators to measure the impact of refrigerants on the environment. Under the general trend of global warming, people have higher and higher requirements for greenhouse gas emissions. The application of refrigerants has brought convenience to people's lives, but also brought environmental problems. At present, many refrigerants, such as 1,1,1,2-tetrafluoroethane refrigerant (R134a), R410a refrigerant, difluorochloromethane refrigerant (R22), etc., belong to high GWP types, so it is necessary to reduce the emission of HFC non-CO2 greenhouse gases.

[0003] The natural working fluid propane (R290) meets the current requirements for the environmental performance of refrigerants due to its excellent environmental performance (ODP=0, GWP=3), but it is highly flammable and is a flammable refrigerant. It has great deficiencies in safety, which limits its development.

[0004] It is urgent to find a green, safe, efficient and high-performance refrigerant to replace high-GWP refrigerants. Summary of the invention

[0005] Therefore, the present application provides a refrigerant and a preparation method thereof, which can solve the problem that the R290 refrigerant in the prior art has strong flammability and safety issues.

[0006] In order to solve the above problems, the present application provides a refrigerant, characterized in that it is composed of a first component, a second component and a third component, wherein:

[0007] The first component is 3,3,3-trifluoropropyne;

[0008] The second component is trifluoroiodomethane;

[0009] The third component is one of 2,3,3,3-tetrafluoropropene or trans-1,3,3,3-tetrafluoropropene;

[0010] In the refrigerant, the content of the first component is a first preset value, the content of the second component is a second preset value, and the content of the third component is a third preset value; satisfying: the first preset value, the second preset value and the third preset value are all greater than zero, and the sum is 100%.

[0011] In some embodiments,

[0012] The first preset value is 52%-88% by mass.

[0013] In some embodiments,

[0014] The first preset value is 56%-84% by mass.

[0015] In some embodiments,

[0016] The first preset value is 60%-80% by mass.

[0017] In some embodiments,

[0018] The first preset value is 64-76% by mass.

[0019] In some embodiments,

[0020] The first preset value is 68-72% by mass.

[0021] In some embodiments,

[0022] The second preset value is 4%-36% by mass.

[0023] In some embodiments,

[0024] The second preset value is 8%-28% by mass.

[0025] In some embodiments,

[0026] The second preset value is 12%-24% by mass.

[0027] In some embodiments,

[0028] The second preset value is 16%-20% by mass.

[0029] In some embodiments,

[0030] The third preset value is 4%-36% by mass.

[0031] In some embodiments,

[0032] The third preset value is 8%-32% by mass.

[0033] In some embodiments,

[0034] The third preset value is 12%-24% by mass.

[0035] In some embodiments,

[0036] The third preset value is 16%-20% by mass.

[0037] According to another aspect of the present application, there is provided a method for preparing the refrigerant as described above, comprising:

[0038] Under normal temperature and pressure, the first component, the second component and the third component are physically mixed evenly to obtain the refrigerant.

[0039] The present application provides a refrigerant, which is composed of a first component, a second component and a third component, wherein: the first component is 3,3,3-trifluoropropyne; the second component is trifluoroiodomethane; the third component is one of 2,3,3,3-tetrafluoropropene or trans-1,3,3,3-tetrafluoropropene; in the refrigerant, the content of the first component is a first preset value, the content of the second component is a second preset value, and the content of the third component is a third preset value; and the first preset value, the second preset value and the third preset value are all greater than zero, and the sum is 100%.

[0040] This application is a refrigerant composed of three components, with a GWP of less than 150 and an ODP of 0, which has obvious environmental advantages. At the same time, the thermal performance and unit volume cooling capacity of the environmentally friendly mixed refrigerant are similar to those of R290. The mixed refrigerant can replace R290, its flammability is greatly reduced, and its safety is significantly improved, which is better than the safety level of R290, so it can solve the technical problems of high flammability and poor safety performance of R290 refrigerant. DETAILED DESCRIPTION

[0041] The technical solution of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. The technology and methods known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology and methods should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit the components is only for the convenience of distinguishing the components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0045] According to an embodiment of the present application, a refrigerant is composed of a first component, a second component and a third component, wherein:

[0046] The first component is 3,3,3-trifluoropropyne;

[0047] The second component is trifluoroiodomethane;

[0048] The third component is one of 2,3,3,3-tetrafluoropropene or trans-1,3,3,3-tetrafluoropropene;

[0049] In the refrigerant, the content of the first component is a first preset value, the content of the second component is a second preset value, and the content of the third component is a third preset value; satisfying: the first preset value, the second preset value and the third preset value are all greater than zero, and the sum is 100%.

[0050] The present application adopts a refrigerant composed of three components, with a GWP of less than 150 and an ODP of 0, which has obvious environmental advantages. At the same time, the thermal performance and unit volume cooling capacity of the environmentally friendly mixed refrigerant are similar to those of R290, so it can replace R290. Its flammability is greatly reduced, and its safety is significantly improved, which is better than the safety level of R290. This can solve the technical problems of high flammability and poor safety performance of R290 refrigerant.

[0051] The refrigerant in this application has the following advantages:

[0052] (1) It is a mixed refrigerant with good thermodynamic properties. Its volumetric cooling capacity is greater than that of R290, and its coefficient of performance (COP) is equivalent to that of R290.

[0053] (2) The global warming potential (GWP) value of the mixed refrigerant is less than 150, the ODP value is zero, and the environmental performance is excellent;

[0054] (3) The temperature glide of the mixed refrigerant is less than 4°C, its flammability is better than R290, and its safety is greatly improved compared to R290.

[0055] The basic parameters of the components used in the refrigerant of this application and R290 are shown in Table 1 below;

[0056] Table 1 Basic parameters of each component

[0057]

[0058]

[0059] Note: Safety levels are classified according to ASHRAE 34-2019 as follows: non-flammable (1), weakly flammable (2L), flammable (2), and highly flammable and explosive (3).

[0060] From the data in Table 1, we can see that for GWP, the GWP of TFP is 11, and the GWP of R13I1, R1234yf and R1234ze(E) are all 1. The environmental performance of the components is excellent, and the GWP is less than 150. The environmental performance of the refrigerant can be greatly improved by mixing.

[0061] Regarding the safety level, i.e. flammability, TFP and R290 have a flammability level of Class 3, R13I1 has a flammability level of Class 1, and R1234yf and R1234ze(E) have a flammability level of Class 2L. By selecting appropriate components (controlling the mass fraction of TFP), the flammability of the refrigerant in this application is at least better than that of R290.

[0062] Therefore, by mixing the above working fluids, at an appropriate ratio, the thermodynamic properties of the mixture can be made equivalent to that of R290.

[0063] According to another aspect of the present application, there is provided a method for preparing the refrigerant as described above, comprising:

[0064] Under normal temperature and pressure, the first component, the second component and the third component are physically mixed evenly to obtain the refrigerant.

[0065] Since the three components are all in liquid phase at room temperature and pressure, the preparation can be completed by direct physical mixing, which is simple to operate.

[0066] The present invention is described and compared with specific embodiments below to reflect the superiority of the refrigerant of the present invention. For specific embodiments, see the proportions in Table 2.

[0067] Table 2 Mass ratio of each component

[0068]

[0069]

[0070] The present application adopts a refrigerant formula to replace R290, and the selected design conditions are: the evaporation temperature of the evaporator is 10°C, the condensation temperature of the condenser is 40°C, the gas phase at the evaporator outlet is in a superheated state with a superheat degree of 5°C, the liquid phase at the condenser outlet is in a subcooled state with a subcooling degree of 5°C, and the adiabatic efficiency of the compressor is 0.75.

[0071] Theoretical calculations were performed using the cycle performance parameters of the above embodiments and R290 refrigerant in the refrigeration system. The physical property data were taken from REFPROP 10.0. The GWP (calculated by linear addition of mass percentage), relative unit volume cooling / heating capacity Qv (ratio to unit volume cooling / heating capacity of R290), relative coefficient of performance COP (ratio to coefficient of performance of R290) and flammability rating were compared. The results are shown in Table 3 below:

[0072] Table 3 Performance comparison results of the refrigerant in this application and R290

[0073]

[0074]

[0075] GWP is the greenhouse effect potential, which measures the impact of gases on global warming. Limiting GWP to a lower level can reduce the overall emission of greenhouse gases and reduce the degree of global warming. Based on environmental protection requirements, refrigerants with larger GWP will be gradually phased out. Generally speaking, the smaller the GWP, the better. Therefore, refrigerants with lower GWP are sought to meet the requirements of refrigerant reduction and quota restrictions.

[0076] Both volumetric cooling capacity and COP reflect the refrigeration capacity of the refrigerant. A good refrigerant needs to simultaneously meet the requirements of low GWP, high volumetric cooling capacity and high COP. The relative COP in Table 3 is greater than 0.9, indicating that compared with R290, the unit volumetric cooling / heating capacity and performance coefficient COP of all embodiments are higher or similar to R290, and can be used as a substitute for R290 in applications without redesigning the refrigeration system.

[0077] As can be seen from Table 3, the GWP of the mixed refrigerants provided in this application is less than 10, and is far less than 150, which can fully meet the current Kigali Amendment's control requirements for refrigerants. The relative volumetric cooling capacity of all refrigerant formulations is greater than 1, the relative performance coefficient is greater than 0.9, and the maximum volumetric cooling capacity is increased by 14% compared with R290. All embodiments have good safety and flammability, which is at least better than R290.

[0078] Comparative Examples 1-4 are not within the mass ratios provided in this application, and their volumetric refrigeration capacities relative to R290 are all lower than 0.9.

[0079] In summary, the three-component mixed refrigerant provided in this application has a GWP far less than 150, and its safety performance is better than R290. Its thermal performance is also comparable to or even better than that of R290 refrigerant, and it can be a good substitute for R290.

[0080] It is easy for those skilled in the art to understand that the above-mentioned implementation modes can be freely combined and superimposed without conflict.

[0081] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A refrigerant, characterized in that: It is composed of a first component, a second component and a third component, wherein: The first component is 3,3,3-trifluoropropyne; The second component is trifluoroiodomethane; The third component is one of 2,3,3,3-tetrafluoropropene or trans-1,3,3,3-tetrafluoropropene; In the refrigerant, the content of the first component is a first preset value, the content of the second component is a second preset value, and the content of the third component is a third preset value; satisfying: the first preset value, the second preset value and the third preset value are all greater than zero, and the sum is 100%; The first preset value is 52%-88% by mass; The second preset value is 4%-36% by mass; The third preset value is 4%-36% by mass.

2. The refrigerant according to claim 1, characterized in that The first preset value is 56%-84% by mass.

3. The refrigerant according to claim 2, characterized in that The first preset value is 60%-80% by mass.

4. The refrigerant according to claim 3, characterized in that The first preset value is 64-76% by mass.

5. The refrigerant according to claim 4, characterized in that The first preset value is 68-72% by mass.

6. The refrigerant according to claim 1, characterized in that The second preset value is 8%-28% by mass.

7. The refrigerant according to claim 6, characterized in that The second preset value is 12%-24% by mass.

8. The refrigerant according to claim 7, characterized in that The second preset value is 16%-20% by mass.

9. The refrigerant according to claim 1, characterized in that The third preset value is 8%-32% by mass.

10. The refrigerant according to claim 9, characterized in that The third preset value is 12%-24% by mass.

11. The refrigerant according to claim 10, characterized in that The third preset value is 16%-20% by mass.

12. A method for preparing the refrigerant according to claims 1-11, characterized in that: include: Under normal temperature and pressure, the first component, the second component and the third component are physically mixed evenly to obtain the refrigerant.

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