Nano refrigerant and application thereof

Abstract

The invention belongs to the technical field of refrigerants, and particularly relates to a nano refrigerant and application thereof. The nano refrigerant comprises the following components in parts by weight: 10 to 35 parts of fluoroethane R161; 30 to 75 parts of tetrafluoropropene R1234YF; 10 to 25 parts of trifluoroiodomethane R13I1; and 2-5 parts of a metal nano material. The refrigerant provided by the invention is green, energy-saving and environment-friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerants, and in particular relates to a nano refrigerant and application thereof. Background Art

[0002] Regarding the research on green, energy-saving and environmentally friendly refrigerants, the proposed alternative refrigerants are mainly considered for the purpose of protecting the ozone layer, and the development of HFCs refrigerants is one of the hot topics. At the same time, attention is also paid to the protection of the ozone layer and the reduction of the greenhouse effect. Not only is the ODP of the refrigerant required to be zero, but the GWP must also meet domestic and international standards.

[0003] At present, 97% of large and extra-large chillers at home and abroad use R134 refrigerant, which is also a kind of fluorine product. It is a high-energy-consuming and high-polluting refrigerant. Although this type of product does not damage the ozone layer and its ODP is zero, its greenhouse index reaches 1430. The current greenhouse index emission standard at home and abroad is 500, which is also the culprit of global warming. In addition, the use of R134 (GWP: 1430) will be completely banned starting in 2029.

[0004] Therefore, it is necessary to develop green, energy-saving and environmentally friendly refrigerants. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides a nano refrigerant and its application. The refrigerant provided by the present invention is green, energy-saving and environmentally friendly.

[0006] The technical solution provided by the present invention is as follows:

[0007] A nano refrigerant comprises the following components in parts by weight: 10-35 parts of fluoroethane R161; 30-75 parts of tetrafluoropropylene R1234YF; 10-25 parts of trifluoroiodomethane R13I1; and 2-5 parts of metal nanomaterials.

[0008] In the above technical solution:

[0009] R161 has large latent heat, good activity and good thermal conductivity;

[0010] R1234YF has the same boiling point and similar glide temperature as the traditional R-134 refrigerant commonly used in large chillers, which can increase the latent heat of evaporation of the refrigerant and improve the operating efficiency of the system;

[0011] R161 and R1234YF are slightly flammable gases and can be flame retardant by adding R13I1.

[0012] Preferred: R161: 15-35 parts; R1234YF: 35-55 parts; R13I1: 10-20 parts; metal nanomaterial: 2-5 parts.

[0013] Preferred: R-161: 14-30 parts; R1234YF: 30-55 parts; R13I1: 10-20 parts; metal nanomaterial: 2-5 parts.

[0014] Preferred: R-161: 13-35 parts; R1234YF: 40-65 parts; R13I1: 14-22 parts; metal nanomaterial: 2-5 parts.

[0015] Preferred: R-161: 13-17 parts; R1234YF: 30-70 parts; R13I1: 12-18 parts; metal nanomaterial: 2-5 parts.

[0016] Preferred: R-161: 20-25 parts; R1234YF: 50-65 parts; R13I1: 10-20 parts; metal nanomaterial: 2-5 parts.

[0017] Preferred: R-161: 10-15 parts; R1234YF: 65-75 parts; R13I1: 10-15 parts; metal nanomaterial: 2-5 parts.

[0018] Preferred: R-161: 12-15 parts; R1234YF: 55-75 parts; R13I1: 20-25 parts; metal nanomaterial: 2-5 parts.

[0019] Preferred: R-161: 20-30 parts; R1234YF: 55-65 parts; R13I1: 10-20 parts; metal nanomaterial: 2-5 parts.

[0020] Specifically, the metal nanomaterial is selected from highly corrosion-resistant and wear-resistant two-dimensional vanadium carbide nanofilm materials, which can be selected from the existing technology or provided by the present invention.

[0021] The invention also provides application of the nano refrigerant for replacing the R-134 refrigerant.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The ozone layer ODP of the refrigerant provided by the present invention is zero, and the greenhouse index GWP is 12, which is one hundred and twentieth of the traditional refrigerant R134. For example, a large chiller of 1000kW / H refrigeration equipment runs 3000 hours per year. By comparing greenhouse gases with new and old refrigerants and calculating carbon emissions, 360 tons of carbon emissions can be reduced per year.

[0024] 2. The present invention replaces the R-134 refrigerant of traditional large-scale chillers (screw units, centrifugal units) of refrigeration equipment, and the energy consumption of the equipment is reduced by more than 15%. For example, a large-scale chiller of refrigeration equipment with a capacity of 1000kW / H runs for 3000 hours per year and consumes 3 million kWh of electricity per year. If the energy saving is calculated by 15%, 450,000 kWh of electricity can be saved.

[0025] 3. The product of the present invention contains an additive of highly corrosion-resistant and wear-resistant nanomaterials. After the compressor of the refrigeration equipment is operated, the compressor tank absorbs the nanoparticles, which increases the wear resistance of the compressor tank by 30% and extends the service life of the compressor by more than 30%.

[0026] 4. The refrigerant provided by the present invention can directly replace R-134 in large-scale industrial and commercial air-conditioning chillers. Because of its large latent heat of evaporation and faster cooling speed per unit time, its refrigeration efficiency is high. The field application data of large screw units of Hubei Grand Theater Co., Ltd. over three years and four months has proved that the energy-saving effect is good. The replacement application in large screw units with R-134 as the refrigerant in industrial and commercial air-conditioning equipment can save an average of more than 17%.

[0027] 5. Trifluoroiodomethane has better flame retardancy and lower GWP value. The results of 25 ignition tests in the laboratory for two years and six months prove that the auto-ignition point reaches 685 degrees through ignition point, flash point and toxicity tests, which proves that trifluoroiodomethane has strong flame retardancy. Therefore, the refrigerant provided by the present invention is non-flammable, non-toxic, and has a flash point of 100 degrees closed cup. It does not damage the ozone layer and has an extremely low greenhouse effect.

[0028] 6. The energy-saving refrigerant for industrial and commercial air-conditioning chillers provided by the present invention has a high unit refrigeration efficiency, so its filling amount is 75% of R-134.

[0029] 7. The refrigeration capacity of the refrigerant provided by the present invention is more than 5% higher than that of R-134, which can make the compressor unloaded in advance. At the same time, the refrigerant provided by the present invention is a mixed refrigerant whose average molecular weight is smaller than that of R-134, has better flowability, and low delivery pressure, which reduces the working pressure of the compressor. Unloading in advance and reducing the working pressure can effectively extend the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a preparation flow chart of the refrigerant provided by the present invention. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Unless otherwise specified, the test methods used in the examples are conventional methods; the materials and reagents used are commercially available reagents and materials unless otherwise specified.

[0033] Example 1

[0034] A nanometer energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 10 parts; R1234YF: 65 parts; R13I1: 20 parts; metal nanomaterial: 5 parts. The preparation method is as follows:

[0035] S1. The purity of the three raw materials is tested by Agilent Colorimeter to ensure that their purity reaches 99.96% of the refrigerant grade;

[0036] S2. Connect the new fully automatic mixing tank;

[0037] S3. Evacuate the new fully automatic mixing tank to achieve negative pressure;

[0038] S4. Add the qualified raw materials into the new automatic mixing tank according to the weight ratio;

[0039] S5. Start the new fully automatic mixing device to stir for three hours;

[0040] S6. The finished product, i.e. the mixed refrigerant, is stirred for three hours to test the accuracy of the weight ratio of each component;

[0041] S7. After the product is stirred in the mixing device for three hours, it is stabilized for three hours and then sampled and tested again;

[0042] S8. Connect the fully automatic packaging machine at the lower end of the mixing device to package the finished product.

[0043] The process can be referred to Figure 1 .

[0044] Example 2

[0045] A nano energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 20 parts; R1234YF: 45 parts; R13I1: 20 parts, and metal nanomaterial: 5 parts. The preparation method is basically the same as that of Example 1.

[0046] Example 3

[0047] A nano energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 20 parts; R1234YF: 50 parts; R13I1: 25 parts; and metal nanomaterial: 5 parts. The preparation method is basically the same as that of Example 1.

[0048] Example 4

[0049] A nano energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 25 parts; R1234YF: 50 parts; R13I1: 20 parts; and metal nanomaterial: 5 parts. The preparation method is basically the same as that in Example 1.

[0050] Example 5

[0051] A nano energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 25 parts; R1234YF: 45 parts; R13I1: 25 parts; and metal nanomaterial: 5 parts. The preparation method is basically the same as that in Example 1.

[0052] Example 6

[0053] A nano energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 35 parts; R1234YF: 40 parts; R13I1: 20 parts; and metal nanomaterial: 5 parts. The preparation method is basically the same as that in Example 1.

[0054] Example 7

[0055] A nano energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 35 parts; R1234YF: 40 parts; R13I1: 22 parts; and metal nanomaterial: 3 parts. The preparation method is basically the same as that in Example 1.

[0056] Example 8

[0057] A nano energy-saving and environmentally friendly refrigerant that can be used to replace R-134 is prepared by fully mixing the following raw materials in parts by weight: R-161: 35 parts; R1234YF: 40 parts; R13I1: 23 parts; and metal nanomaterial: 2 parts. The preparation method is basically the same as that of Example 1.

[0058] Performance Test:

[0059] Comparative Example 1 is R-134

[0060] The performance test results are shown in the following table:

[0061]

[0062]

[0063] Effect example

[0064] The energy consumption of two chillers of Hubei Theater Co., Ltd. was compared (the refrigerants prepared in Examples 1 to 8 were put into operation) for a total of 1215 working days. The energy saving rate was calculated by collecting daily data with a computer. The compressors of Units 1 and 2 worked normally. The specific energy saving rate calculation method is as follows.

[0065]

[0066] Example 9

[0067] The method for preparing a metal nanomaterial comprises the following steps:

[0068] V3AlC2 is etched with a hydrofluoric acid / hydrochloric acid mixed solution to remove the interlayer Al element to obtain the two-dimensional transition metal carbide nanofilm. The specific preparation method is as follows: 0.8g V3AlC2 powder (30 mesh) is added to 50mL hydrofluoric acid / hydrochloric acid mixed solution (volume ratio is 1:4), and reacted at 95°C for 8h. After the reaction is completed, it is washed and purified with ultrapure water, ethanol and acetone mixed solution (volume ratio is 2:1) for multiple times until the solution is neutral. After the precipitate is fully dried, a two-dimensional vanadium carbide thin film material can be obtained.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A nano refrigerant, characterized in that: The invention comprises the following components in parts by weight: 10-35 parts of fluoroethane R161; 30-75 parts of tetrafluoropropylene R1234YF; 10-25 parts of trifluoroiodomethane R13I1; and 2-5 parts of metal nanomaterials.

2. The nano-refrigerant according to claim 1, characterized in that: The invention comprises the following components in parts by weight: R161: 15-35 parts; R1234YF: 35-55 parts; R13I1: 10-20 parts; and metal nanomaterial: 2-5 parts.

3. The nano-refrigerant according to claim 1, characterized in that: The invention comprises the following components in parts by weight: R-161: 14-30 parts; R1234YF: 30-55 parts; R13I1: 10-20 parts; and metal nanomaterial: 2-5 parts.

4. The nano-refrigerant according to claim 1, characterized in that: The invention comprises the following components in parts by weight: R-161: 13-35 parts; R1234YF: 40-65 parts; R13I1: 14-22 parts; and metal nanomaterial: 2-5 parts.

5. The nano-refrigerant according to claim 1, characterized in that: The invention comprises the following components in parts by weight: R-161: 13-17 parts; R1234YF: 30-70 parts; R13I1: 12-18 parts; and metal nanomaterial: 2-5 parts.

6. The nano-refrigerant according to claim 1, characterized in that: The invention comprises the following components in parts by weight: R-161: 20-25 parts; R1234YF: 50-65 parts; R13I1: 10-20 parts; and metal nanomaterial: 2-5 parts.

7. The nano-refrigerant according to claim 1, characterized in that: The invention comprises the following components in parts by weight: R-161: 10-15 parts; R1234YF: 65-75 parts; R13I1: 10-15 parts; and metal nanomaterial: 2-5 parts.

8. The nano-refrigerant according to claim 1, characterized in that: The composition comprises the following components in parts by weight: R-161: 12-15 parts; R1234YF: 55-75 parts; R13I1: 20-25 parts; Metal nanomaterials: 2-5 parts; Alternatively, R-161: 20-30 parts; R1234YF: 55-65 parts; R13I1: 10-20 parts; metal nanomaterial: 2-5 parts.

9. The nano-refrigerant according to claim 1, characterized in that: The metal nanomaterial is selected from highly corrosion-resistant and wear-resistant two-dimensional vanadium carbide nanofilm materials.

10. An application of the nano-refrigerant according to any one of claims 1 to 9, characterized in that: Used to replace R-134 refrigerant.

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