Refrigerant as well as preparation method and application thereof
By preparing a refrigerant by compounding 1-chloro-3,3,3-trifluoropropylene and propylene, the problem of high GWP value of existing refrigerants is solved, and a refrigeration effect with low GWP value and high energy efficiency is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2026-03-24
AI Technical Summary
Existing refrigerants such as R22 and R410A have high global warming potential and ozone layer depletion potential, necessitating the development of low-GWP and highly efficient alternatives.
A refrigerant is prepared by mixing 1-chloro-3,3,3-trifluoropropylene and propylene, with a preferred mass ratio of 7.5%:92.5%. The mixture is then prepared in a liquid state to form a refrigerant for use in a refrigeration system.
It provides a refrigerant with a low GWP value, significantly reducing the global warming potential, improving energy efficiency and cooling speed, and is superior to the existing R32 refrigerant.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of refrigeration, and particularly relates to a refrigerant and a preparation method and application thereof. BACKGROUND
[0002] With the increasing awareness of environmental protection around the world, the refrigeration industry is facing great challenges and changes. Traditional refrigerants, such as R22 and R410A, although to some extent meet the refrigeration demand, but its high global warming potential (GWP) and the destruction potential (ODP) of ozone layer has become an environmental problem that cannot be ignored. Especially R410A, although as a substitute for R22 has been widely used for a period of time, but its GWP value is still as high as 1924, the contribution to global climate warming cannot be ignored.
[0003] In order to cope with this challenge, the international community and governments have introduced a series of regulations and policies to promote the update of refrigerants, eliminate high GWP value refrigerants, and encourage the use of more environmentally friendly and efficient substitutes. In this context, the development of new low GWP value refrigerants has become an important task of the refrigeration industry.
[0004] R32 as a low GWP value refrigerant (GWP value is 677), because of its good energy efficiency and lower charge, it is concerned. However, R32 also has some shortcomings, such as lower energy efficiency, which limits its application range to some extent. Therefore, it is particularly important to find a substitute that can maintain the advantages of R32 and overcome its shortcomings. SUMMARY
[0005] The present application develops a compound refrigerant, which is compounded by 1-chloro-3,3,3-trifluoropropene and propylene, which has excellent energy efficiency on the basis of low GWP value.
[0006] In order to achieve the above purpose, the present application can adopt the following technical scheme:
[0007] The present application provides a refrigerant comprising 1-chloro-3,3,3-trifluoropropene and propylene.
[0008] Preferably, in the above refrigerant, the mass percentage of 1-chloro-3,3,3-trifluoropropene can be 5%-12%, and the mass percentage of propylene can be 88%-95%.
[0009] Preferably, in the above refrigerant, the mass percentage of 1-chloro-3,3,3-trifluoropropene can be 7.5%, and the mass percentage of propylene can be 92.5%.
[0010] Another aspect of the present invention provides a method for preparing the refrigerant of the present invention, which includes: thoroughly mixing 1-chloro-3,3,3-trifluoropropylene and propylene in a liquid state to obtain the refrigerant.
[0011] In another aspect, the present invention provides a refrigerant, which includes the refrigerant described in the present invention.
[0012] In another aspect, the present invention provides a refrigeration system comprising the refrigerant described in the present invention.
[0013] Another aspect of the present invention provides the application of the refrigerant of the present invention in the preparation of refrigerants.
[0014] The beneficial effects of this invention include at least the following: the refrigerant provided by this invention has a significantly lower GWP than the existing R32 refrigerant, and has significant energy-saving efficiency and fast cooling speed, and can be used as a substitute for R32 refrigerant. Detailed Implementation
[0015] The embodiments described are provided to better illustrate the present invention, but are not intended to limit the scope of the invention to the embodiments described. Therefore, non-essential improvements and adjustments made to the embodiments by those skilled in the art based on the above description are still within the scope of protection of the present invention.
[0016] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. Singular expressions include plural expressions unless they have a distinct meaning in the context. As used herein, it should be understood that terms such as “comprising,” “having,” “including,” are intended to indicate the presence of features, numbers, operations, components, parts, elements, materials, or combinations thereof. The terminology of the invention is disclosed in the specification and is not intended to exclude the possibility that one or more other features, numbers, operations, components, parts, elements, materials, or combinations thereof may be present or added. As used herein, “ / ” may be interpreted as “and” or “or,” depending on the context.
[0017] This invention provides a refrigerant comprising 1-chloro-3,3,3-trifluoropropylene and propylene.
[0018] It should be noted that in this invention, by compounding 1-chloro-3,3,3-trifluoropropylene and propylene, a compound refrigerant with a GWP value far lower than that of R32 and an energy-saving efficiency higher than that of R32 can be prepared.
[0019] In some specific examples, the mass percentage of 1-chloro-3,3,3-trifluoropropylene in the above refrigerant can be 5%-12%, such as 7%, 8%, 9% or 19%; the mass percentage of propylene can be 88%-95%, such as 89%, 91% or 94%.
[0020] In some specific examples, the mass percentage of 1-chloro-3,3,3-trifluoropropylene in the above refrigerant can be 7.5%, and the mass percentage of propylene can be 92.5%.
[0021] It should be noted that, in this invention, the preferred mass percentage of 1-chloro-3,3,3-trifluoropropylene is 7.5%, and the mass percentage of propylene is 92.5%. The compound refrigerant at this ratio is more effective than other ratios.
[0022] The present invention also provides a method for preparing the refrigerant of the present invention, which includes: fully mixing 1-chloro-3,3,3-trifluoropropylene and propylene in a liquid state to obtain the refrigerant.
[0023] It should be noted that the mixing process can be accelerated by stirring or other methods during the thorough mixing process.
[0024] This invention also provides a refrigerant, which includes the refrigerant described in this invention.
[0025] It should be noted that the refrigerant in this invention can be combined with lubricants and preservatives to form a refrigerant working fluid. The lubricant and preservative are substances known in the art. For example, the lubricant can be mineral oil, synthetic oil, and some ester lubricants; the preservative can be organic acid salt preservative, organic nitrogen preservative, organic silicon preservative, or phosphate preservative.
[0026] This invention also provides a refrigeration system comprising the refrigerant described in this invention.
[0027] It should be noted that the refrigerant in this invention can be used in refrigeration systems, including those for cold storage and household use.
[0028] This invention also provides an application of the refrigerant in the preparation of a refrigerant.
[0029] To better understand the present invention, specific examples are provided below to further illustrate the content of the present invention, but the content of the present invention is not limited to the examples below.
[0030] The basic information for 1-chloro-3,3,3-trifluoropropylene, propylene, ethylene, and R32 used in the following examples is shown in Table 1 below.
[0031] Table 1 Basic Information on Single-Component Refrigerants
[0032]
[0033] I. Preparation of Mixed Refrigerants
[0034] Example 1
[0035] 1-Chloro-3,3,3-trifluoropropene and propylene are mixed in the liquid phase to obtain a mixed refrigerant, wherein 1-chloro-3,3,3-trifluoropropene accounts for 5% by mass and propylene accounts for 95% by mass.
[0036] Example 2
[0037] 1-Chloro-3,3,3-trifluoropropene and propylene are mixed in the liquid phase to obtain a mixed refrigerant, wherein the mass percentage of 1-chloro-3,3,3-trifluoropropene is 7.5% and the mass percentage of propylene is 92.5%.
[0038] Example 3
[0039] 1-Chloro-3,3,3-trifluoropropene and propylene are mixed in the liquid phase to obtain a mixed refrigerant, wherein the mass percentage of 1-chloro-3,3,3-trifluoropropene is 10% and the mass percentage of propylene is 90%.
[0040] Example 4
[0041] 1-Chloro-3,3,3-trifluoropropene and propylene are mixed in the liquid phase to obtain a mixed refrigerant, wherein the mass percentage of 1-chloro-3,3,3-trifluoropropene is 12% and the mass percentage of propylene is 88%.
[0042] Comparative Example 1
[0043] 1-Chloro-3,3,3-trifluoropropylene is used as the refrigerant.
[0044] Comparative Example 2
[0045] Propylene is used as the refrigerant.
[0046] Comparative Example 3
[0047] Ethylene and propylene are mixed in the liquid phase to obtain a mixed refrigerant, wherein the mass percentage of ethylene is 7.5% and the mass percentage of propylene is 92.5%.
[0048] Comparative Example 4
[0049] Compared to the existing R32 refrigerant.
[0050] II. Mixed Refrigerant Test
[0051] (I) Basic Parameter Testing
[0052] The molecular weight, standard boiling point, critical temperature, critical pressure, and GWP of the refrigerants in Examples 1 to 4 and Comparative Examples 1 to 4 were tested, and the results are shown in Table 2 below.
[0053] Table 2 Basic parameters of refrigerant
[0054] Example / Comparative Example Molecular weight g / mol Normal boiling point Critical temperature Critical pressure GWP Example 1 46.4 -43.6℃ 95.6℃ 4.52 MPa 116 Example 2 48.6 -41.8℃ 97.3℃ 4.57 MPa 73 Example 3 50.9 -40.3℃ 112℃ 4.62 MPa 93 Example 4 52.6 -39.9℃ 123℃ 4.65 MPa 114 Comparative Example 1 130.5 20℃ 150℃ 3.77 MPa - Comparative Example 2 42 -47.7℃ 91.9℃ 4.60 MPa - Comparative Example 3 41 -50.7℃ 93.5 4.82 MPa 328 Comparative Example 4 (R32) 52 -51.7℃ 78.1℃ 4.974 MPa 677
[0055] As shown in Table 2, the GWP of the refrigerants in the embodiments of the present invention is less than 116, which is significantly lower than that of the existing R32. Furthermore, if 1-chloro-3,3,3-trifluoropropylene in the embodiments is replaced with ethylene, the GWP is significantly increased compared with that of Example 1.
[0056] (II) Energy efficiency
[0057] In this invention example, two Gree floor-standing heat pump units, numbered Unit 1 and Unit 2, were installed in the laboratory. Unit 1 used the refrigerant prepared in Comparative Examples 1 to 4 as the refrigerant; each type was used in rotation for 6 months. Unit 2 used the refrigerant prepared in Examples 1 to 4 as the refrigerant. Both units were of the same model, power, and manufacturing date.
[0058] A comparison was made between two units (using the refrigerants prepared in Examples 1 to 4) and Unit 1 (using the refrigerants from Comparative Examples 1 to 4), which operated for a total of 1.5 years. Currently, the compressors of Unit 1 and Unit 2 are working normally. The energy saving rate was calculated (the energy saving rate is the difference between the total power consumption in the examples and the total power consumption in the comparative examples / the total power consumption in the comparative examples); the specific energy saving rate data are shown in Tables 3 to 6 below.
[0059] Table 3 Comparison of the refrigerants prepared in Examples 1 to 4 with the refrigerant in Comparative Example 1.
[0060] Example Example 1 Example 2 Example 3 Example 4 Energy saving rate 34.4％ 39.2％ 35.6％ 33.8％
[0061] Table 4 Comparison of the refrigerants prepared in Examples 1 to 4 with the refrigerant in Comparative Example 2.
[0062] Example Example 1 Example 2 Example 3 Example 4 Energy saving rate 26.4％ 28.2％ 26.6％ 25.8％
[0063] Table 5 Comparison of the refrigerants prepared in Examples 1 to 4 with the refrigerant in Comparative Example 3.
[0064] Example Example 1 Example 2 Example 3 Example 4 Energy saving rate 13.6％ 17.4％ 15.6％ 14.3％
[0065] Table 6 Comparison of the refrigerants prepared in Examples 1 to 4 with the refrigerant in Comparative Example 4.
[0066] Example Example 1 Example 2 Example 3 Example 4 Energy saving rate 22.4％ 26.3％ 23.7％ 24.3％
[0067] As can be seen from Tables 3 to 6 above, the energy-saving effect of the refrigerant prepared in this invention is better than that of Comparative Examples 1 to 4. That is, the combination of 1-chloro-3,3,3-trifluoropropylene and propylene is better than the combination of ethylene and propylene, and also better than 1-chloro-3,3,3-trifluoropropylene and propylene alone, and also better than the existing R32 refrigerant.
[0068] (III) Cooling Time
[0069] In this invention example, two Gree floor-standing heat pump units, numbered Unit 1 and Unit 2, were installed in the laboratory. Unit 1 used the refrigerant prepared in Comparative Examples 1 to 4 as the refrigerant; each type was used in rotation for 6 months. Unit 2 used the refrigerant prepared in Examples 1 to 4 as the refrigerant. Both units were of the same model, power, and manufacturing date.
[0070] Unit 2 (using the refrigerants prepared in Examples 1 to 4) and Unit 1 (using the refrigerants from Comparative Examples 1 to 4) were put into use in a 10-square-meter cold storage room. The time it took for the temperature to drop from room temperature (25°C) to -4°C was recorded. The results are shown in Table 7 below.
[0071] Table 7 Cooling times of different refrigerants in the examples / comparative examples
[0072] Example / Comparative Example Cooling time Example 1 2.3 Example 2 1.5h Example 3 1.9h Example 4 2h Comparative Example 1 3.5h Comparative Example 2 4h Comparative Example 3 3.5h Comparative Example 4 (R32) 3h
[0073] As can be seen from Table 7 above, the refrigerant prepared in the embodiments of the present invention cools from room temperature to 4°C within 3 hours, which is superior to the combination of ethylene and propylene, as well as to single 1-chloro-3,3,3-trifluoropropylene and single propylene, and also superior to the existing R32 refrigerant.
[0074] (III) Exhaust pressure and compression ratio
[0075] To compare the system performance of the refrigerants used in the embodiments and comparative examples, the design conditions of the refrigeration unit were selected as follows: the inlet and outlet temperatures of the heat exchange fluid on the evaporator side were 300.15K and 287.65K, respectively; the inlet and outlet temperatures of the heat exchange fluid on the condenser side were 287.65K and 314.15K, respectively; the logarithmic mean temperature difference between the evaporator and condenser was 11K and 10K, respectively; the refrigerant at the evaporator outlet was in a superheated state with a superheat of 1K; the refrigerant at the condenser outlet was in a subcooled state with an outlet temperature of 291.15K; and the adiabatic efficiency of the compressor was 0.7. The cyclic performance parameters of the refrigeration systems using the refrigerants of Examples 1 to 4 and Comparative Examples 1 to 4 under the above conditions were tested and calculated. The discharge temperature, compression ratio, relative volumetric refrigeration capacity Qv (ratio to the volumetric refrigeration capacity of R134a), and EER improvement (compared to R134a) were obtained and recorded in Table 8.
[0076] Table 8. Refrigerant discharge pressure and compression ratio in Examples / Comparative Examples
[0077] Example / Comparative Example Discharge pressure Compression ratio Example 1 2.42 MPa 1.52 Example 2 2.24 MPa 1.43 Example 3 2.38 MPa 1.56 Example 4 2.78 MPa 1.46 Comparative Example 1 2.51 MPa 1.74 Comparative Example 2 2.62 MPa 1.83 Comparative Example 3 2.71 MPa 1.93 Comparative Example 4 (R32) 3.32 MPa 2.31
[0078] As can be seen from the data in the table above, each embodiment of the present invention fully considers the properties of each component in the composition and defines the range of the mass ratio of each component to ensure that the system energy efficiency is greatly improved while the GWP of the environmentally friendly mixed refrigerant is less than 150.
[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A refrigerant, characterized in that, Including 1-chloro-3,3,3-trifluoropropene and propylene.
2. The refrigerant according to claim 1, characterized in that, The mass percentage of 1-chloro-3,3,3-trifluoropropene is 5%-12%, and the mass percentage of propylene is 88%-95%.
3. The refrigerant according to claim 2, characterized in that, The mass percentage of 1-chloro-3,3,3-trifluoropropene is 7.5%, and the mass percentage of propylene is 92.5%.
4. The method for preparing the refrigerant according to any one of claims 1 to 3, characterized in that, include: A refrigerant is obtained by thoroughly mixing 1-chloro-3,3,3-trifluoropropene and propylene in the liquid state.
5. A refrigerant, characterized in that, Includes the refrigerant described in any one of claims 1 to 3.
6. A refrigeration system, characterized in that, Includes the refrigerant as described in claim 4.
7. The use of the refrigerant according to any one of claims 1 to 3 in the preparation of refrigerants.