Heat transfer composition and use thereof

Abstract

The present disclosure relates to the field of refrigeration and heating. Disclosed are a heat transfer composition and the use thereof. The heat transfer composition comprises halogenated methane I, fluoropropene II and fluoroethane III, the content of the halogenated methane I being x wt% by mass, the content of the fluoropropene II being y wt% by mass and the content of the fluoroethane III being z wt% by mass. In the ternary-phase diagram thereof, the coordinates (x, y, z) are located on point A (75.1, 23.9, 1.0), point B (75.1, 5.0, 19.9) and point C (94.0, 5.0, 1.0) themselves, straight line segment AB, straight line segment BC and straight line segment CA, and a triangular area defined by said straight line segments. The heat transfer composition provided by the present disclosure has a low GWP value, is environmentally friendly, exhibits good heat exchange effect, involves low cost in use and is applicable to various scenarios, and can achieve a direct replacement on the heat transfer composition R410A or R404A without modifying or changing original heat exchange devices.

Description

Heat transfer compositions and their use

[0001] Cross-reference to related applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202411071777.7, filed on August 6, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the field of refrigeration and heating, in particular to a heat transfer composition and its use. BACKGROUND

[0004] With the increasingly prominent problems of ozone layer depletion and greenhouse effect, the international community has successively formulated the Montreal Protocol and the Kyoto Protocol to eliminate chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) and limit the emission of greenhouse gases. The Montreal Protocol has successfully eliminated nearly 99% of ozone-depleting substances, including chlorofluorocarbons with high global warming potential (GWP value). However, the GWP value of some alternatives such as hydrofluorocarbons (HFCs) is still high. Therefore, according to the requirements of the Montreal Protocol and the Kyoto Protocol, the demand for alternative refrigerants is increasing in various countries. In addition to the requirement that new refrigerants have no damage to the ozone layer, it is also required to have low GWP value and more excellent energy-saving effect.

[0005] Composition R410A (consisting of 50% difluoroethylene and 50% pentafluoroethane) has no toxicity, is non-flammable, non-corrosive, has an ODP value of 0, has good safety and refrigeration performance, and is used to replace traditional HCFC-22 refrigerant, mainly applied in the field of refrigeration such as central air conditioning multi-in-one and water chiller. However, the GWP value of R410A is as high as 2088, and the greenhouse effect is relatively strong, which belongs to the greenhouse gas controlled by the Kyoto Protocol.

[0006] Currently, there are many heat transfer compositions to replace R410A, with GWP values ranging from 150 to 1000. CN102482560B discloses a heat transfer composition containing difluoromethane, 2,3,3,3-tetrafluoropropene and 1,1-difluoroethane, which has a COP (coefficient of performance) comparable to that of R410A. However, the content of difluoromethane in the heat transfer composition is less than 75 wt%, resulting in an average boiling point of the heat transfer composition above -48℃, higher than that of R410A (-51.5℃). Due to its high boiling point, the heat transfer composition needs to be modified or replaced when replacing R410A, which cannot be directly replaced, increasing the cost of replacing R410A. CN117136224A and CN117242154A respectively disclose heat transfer compositions containing 2,3,3,3-tetrafluoropropene, difluoromethane and 1,1-difluoroethane, which are environmentally friendly and used in vehicle air conditioning thermal management systems, but their average boiling points are much higher than that of R410A, making them unsuitable for heat transfer systems compatible with R410A, increasing the cost of replacing R410A. Composition R454B (consisting of 68.9% difluoroethylene and 31.1% 2,3,3,3-tetrafluoropropene) has a weak greenhouse effect, but its heat transfer efficiency is poor compared to R410A, and the use cost of R454B is high. Therefore, under the background of increasing requirements for energy saving and environmental protection, there is still a need to continue to seek more environmentally friendly, better refrigeration effect, and low-cost R410A replacement solutions. SUMMARY

[0007] The purpose of the present disclosure is to overcome the problems of severe greenhouse effect, poor refrigeration effect and high cost in the prior art, and to provide a heat transfer composition with low GWP value, environmental friendliness, good heat exchange effect, low cost and wide application scenarios, and applications thereof.

[0008] According to a first aspect of the present disclosure, the present disclosure provides a heat transfer composition, which comprises: halomethane I, fluorinated propene II, fluorinated ethane III. As shown in FIG. 1, the content of halomethane I is x wt%, the content of fluorinated propene II is y wt%, and the content of fluorinated ethane III is z wt% by mass. In the ternary composition diagram, the coordinates (x, y, z) are located on the triangle region formed by the straight line segments AB, BC, CA and the straight line segments themselves of point A (75.1, 23.9, 1.0), point B (75.1, 5.0, 19.9) and point C (94.0, 5.0, 1.0).

[0009] According to a second aspect of the present disclosure, the present disclosure provides an application of the heat transfer composition according to the present disclosure, which comprises: the heat transfer composition is circulated as a working fluid in a heat exchange device. Optionally, the heat exchange device is selected from one of a domestic heat exchange device, a commercial heat exchange device, a heat pump system heat exchange device, a refrigeration equipment heat exchange device, an industrial refrigeration heat exchange device, an automobile heat exchange device, a data center heat exchange device, and a mobile refrigeration equipment heat exchange device; and / or the heat transfer composition is used as a substitute for the heat transfer composition R410A or R404A.

[0010] The heat transfer composition provided by the present disclosure has low GWP value, is environmentally friendly, and has good heat exchange effect.

[0011] Further, the application of the heat transfer composition according to the present disclosure has low cost and wide application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a ternary phase diagram of the components of the heat transfer composition, halomethane I, fluorinated propene II, and fluorinated ethane III;

[0013] Figures 2-4 are alternative embodiments of the heat transfer composition when the fluorinated propene II is 3,3,3-trifluoropropene;

[0014] Figures 5-7 are alternative embodiments of the heat transfer composition when the fluorinated propene II is hexafluoropropene;

[0015] Figures 8 and 9 are alternative embodiments of the heat transfer composition when the fluorinated propene II is 2,3,3,3-tetrafluoropropene. DETAILED DESCRIPTION

[0016] The specific embodiments of the present disclosure are described in detail below. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure. The endpoints of the ranges and any values disclosed herein are not limited to the precise values stated. The endpoints of the ranges and the values disclosed herein should be understood to be approximate values. For numeric ranges, the endpoints of the ranges, the endpoints of the ranges and individual point values, and individual point values can be combined with each other to obtain one or more new numeric ranges, which should be considered to be specifically disclosed herein.

[0017] The present disclosure provides a heat transfer composition, which comprises: halogenated methane I, fluorinated propylene II, fluorinated ethane III. As shown in FIG. 1, the content of halogenated methane I is x wt%, the content of fluorinated propylene II is y wt%, and the content of fluorinated ethane III is z wt% by mass. In the composition ternary phase diagram, the coordinates (x, y, z) are located on the self, straight line segment AB, straight line segment BC, straight line segment CA, and the triangular region enclosed by the straight line segments of point A (75.1, 23.9, 1.0), point B (75.1, 5.0, 19.9), and point C (94.0, 5.0, 1.0). For example, (x, y, z) can be (85, 10, 5), (85, 5, 10), (90, 5, 5), (81, 15, 4), (88, 5, 7), (84, 15, 1), (87, 5, 8), (80, 5, 15). The heat transfer composition with the foregoing characteristics has low GWP, high CAP and COP, is environmentally friendly, and has good heat exchange effect.

[0018] In the present disclosure, the optional range of halogenated methane I is wide, and the following exemplary description is provided, but the scope of the present disclosure is not limited thereto. According to an optional embodiment of the present disclosure, halogenated methane I is difluoromethane.

[0019] In the present disclosure, the optional range of fluorinated propylene II is wide, and the following exemplary description is provided, but the scope of the present disclosure is not limited thereto. According to an optional embodiment of the present disclosure, fluorinated propylene II is selected from one or more of 3,3,3-trifluoropropene, hexafluoropropene, and 2,3,3,3-tetrafluoropropene.

[0020] In the present disclosure, the optional range of fluorinated ethane III is wide, and the following exemplary description is provided, but the scope of the present disclosure is not limited thereto. According to an optional embodiment of the present disclosure, fluorinated ethane III is selected from one or more of monofluoroethane, 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane, and pentafluoroethane.

[0021] In the present disclosure, when fluorinated propylene II is 3,3,3-trifluoropropene, the optional range of the content of halogenated methane I, fluorinated propylene II, and fluorinated ethane III is wide, and the following exemplary description is provided, but the scope of the present disclosure is not limited thereto. According to an optional embodiment of the present disclosure, as shown in FIG. 2, in the composition ternary phase diagram, the coordinates (x, y, z) are located on the self, straight line segment AD, curve segment DE (x, 0.0074089x 2 -2.6855x+176.093, -0.0074089x 2+1.6855x-76.093), the area enclosed by the line segment EC, the line segment CA, and the line segment. For example, (x, y, z) can be (85, 10, 5), (85, 5, 10), (90, 5, 5), (81, 15, 4), (88, 5, 7). The heat transfer composition having the aforementioned characteristics has a boiling point close to that of the heat transfer composition R410A, and can directly replace R410A.

[0022] According to an optional embodiment of this disclosure, as shown in FIG3, in the composition triphase diagram, the coordinates (x, y, z) are located at points C (94.0, 5.0, 1.0), F (78.3, 20.7, 1.0), and G (87.1, 5.0, 7.9), the straight line segment CF, and the curve segment FG (x, 0.023594x). 2 -5.6878x + 321.331, -0.023594x 2 +4.6878x-221.331), the straight line segment GC, and the area enclosed by the line segment. For example, (x, y, z) can be (85, 10, 5), (90, 5, 5), (88, 5, 7). The heat transfer composition with the aforementioned characteristics has a higher CAP.

[0023] According to another optional embodiment of this disclosure, as shown in FIG4, in the composition three-phase diagram, the coordinates (x, y, z) are located at points B (75.1, 5.0, 19.9), H (88.5, 5.0, 6.5), and I (75.1, 22.6, 2.3), the straight line segment BH, and the curve segment HI (x, 0.0047469x). 2 -2.0895x+152.759, -0.0047469x 2 +1.0895x-52.759), the straight line segment IB, and the area enclosed by the line segment. For example, (x, y, z) can be (85, 5, 10) or (88, 5, 7). The heat transfer composition with the aforementioned characteristics has a higher COP.

[0024] According to another optional embodiment of this disclosure, in the composition ternary phase diagram, the coordinates (x, y, z) lie at the intersection of points C, F, and G themselves, the straight line segment CF, the curved line segment FG, the straight line segment GC, and the region enclosed by said line segments, with points B, H, and I themselves, the straight line segment BH, the curved line segment HI, the straight line segment IB, and the region enclosed by said line segments. For example, (x, y, z) could be (88, 5, 7). The heat transfer composition having the aforementioned characteristics, with a boiling point close to that of heat transfer composition R410A, can achieve a direct substitution of R410A while having higher CAP and COP.

[0025] In the present disclosure, when the fluoro-propene II is hexafluoropropene, the content of the halogenated methane I, the fluoro-propene II, the fluoro-ethane III can be selected in a wider range, which is exemplarily illustrated below, but does not limit the scope of the present disclosure. According to an optional embodiment of the present disclosure, as shown in FIG. 5, in the composition ternary phase diagram, the coordinate (x, y, z) is located on the self, the straight line segment AD', the curved line segment D'E' (x, -0.0006946x 2 -1.1682x + 105.257, 0.0006946x 2 + 0.1682x - 5.257), the straight line segment EC, the straight line segment CA, and the region enclosed by the line segments. For example, (x, y, z) can be (84, 15, 1), (85, 5, 10), (90, 5, 5), (87, 5, 8). The heat transfer composition with the foregoing characteristics has a boiling point close to that of the heat transfer composition R410A, and can achieve direct replacement of R410A.

[0026] According to an optional embodiment of the present disclosure, as shown in FIG. 6, in the composition ternary phase diagram, the coordinate (x, y, z) is located on the self, the straight line segment AF', the curved line segment F'G' (x, 0.0028304x 2 -1.7321x + 133.303, -0.0028304x 2 + 0.7321x - 33.303), the straight line segment GC, the straight line segment CA, and the region enclosed by the line segments. For example, (x, y, z) can be (84, 15, 1), (90, 5, 5), (87, 5, 8). The heat transfer composition with the foregoing characteristics has a higher CAP.

[0027] According to another optional embodiment of the present disclosure, as shown in FIG. 7, in the composition ternary phase diagram, the coordinate (x, y, z) is located on the self, the straight line segment BH', the curved line segment H'I' (x, 0.0044568x 2 -1.7837x + 128.996, -0.0044568x 2+ 0.7837x - 28.996, straight line segment IB, and the area enclosed by the line segments. For example, (x, y, z) can be (85, 5, 10), (87, 5, 8). The heat transfer composition with the foregoing characteristics has a higher COP.

[0028] According to another optional embodiment of the present disclosure, in the composition ternary phase diagram, the coordinate (x, y, z) is located on the intersection of the area enclosed by the points A, C, F', and G', themselves, straight line segment AF', curved line segment F'G', straight line segment G'C, straight line segment CA, and the line segments, and the area enclosed by the points B, H', I', themselves, straight line segment BH', curved line segment H'I', straight line segment IB, and the line segments. For example, (x, y, z) can be (87, 5, 8). The heat transfer composition with the foregoing characteristics has a boiling point close to that of the heat transfer composition R410A, can achieve direct replacement of R410A, and has a higher CAP and COP.

[0029] In the present disclosure, when the fluoro-propene II is 2,3,3,3-tetrafluoropropene, the content of the halogenated methane I, the fluoro-propene II, and the fluoro-ethane III can be in a wider range, which is exemplarily illustrated below, but the present disclosure is not limited thereto. According to an optional embodiment of the present disclosure, as shown in FIG. 8, in the composition ternary phase diagram, the coordinate (x, y, z) is located on the intersection of the area enclosed by the points A (75.1, 23.9, 1.0), C (94.0, 5.0, 1.0), D" (75.1, 13.9, 11.0), and E" (81.9, 5.0, 13.1), themselves, straight line segment AD", curved line segment D"E" (x, 0.0008961x 2 - 1.4673x + 119.098, -0.0008961x 2 + 0.4673x - 19.098), straight line segment E"C, straight line segment CA, and the line segments. For example, (x, y, z) can be (85, 5, 10), (90, 5, 5), (84, 15, 1). The heat transfer composition with the foregoing characteristics has a boiling point close to that of the heat transfer composition R410A, and can achieve direct replacement of R410A.

[0030] According to another optional embodiment of the present disclosure, as shown in FIG. 9, in the composition ternary phase diagram, the coordinate (x, y, z) is located on the intersection of the area enclosed by the points A (75.1, 23.9, 1.0), B (75.1, 5.0, 19.9), H" (86.3, 5.0, 8.7), I" (84.4, 14.6, 1.0), themselves, straight line segment AB, straight line segment BH", curved line segment H"I" (x, 2.2978x 2 - 397.304x + 17178.778, -2.2978x 2+396.304x-17078.778), the straight line segment I”A and the area enclosed by the line segment. For example, (x, y, z) can be (85, 5, 10), (80, 5, 15), (84, 15, 1). The heat transfer composition with the aforementioned characteristics has a higher COP.

[0031] According to another optional embodiment of this disclosure, in the composition ternary phase diagram, the coordinates (x, y, z) are located at the intersection of the regions enclosed by points A, C, D”, and E” themselves, line segment AD”, curve segment D”E”, line segment E”C, line segment CA, and said line segments, and the regions enclosed by points A, B, H”, and I” themselves, line segments AB, BH”, curve segment H”I”, line segment I”A, and said line segments. For example, (x, y, z) can be (85, 5, 10) or (84, 15, 1). The heat transfer composition having the aforementioned characteristics, with a boiling point close to that of the heat transfer composition R410A, can achieve a direct substitution of R410A while having higher CAP and COP.

[0032] According to an alternative embodiment of this disclosure, the heat transfer composition further includes: substance IV.

[0033] In this disclosure, the range of possible substances IV is broad. The following is an illustrative description, but it does not limit the scope of this disclosure. According to one alternative embodiment of this disclosure, substance IV is selected from one or more of the following: fluoroolefins other than 3,3,3-trifluoropropylene, hexafluoropropylene and 2,3,3,3-tetrafluoropropylene, C1-C4 alkanes, trifluoroiodomethane, carbon dioxide and dimethyl ether.

[0034] In this disclosure, the range of fluorinated olefins is relatively wide, and fluorinated olefins other than 3,3,3-trifluoropropylene, hexafluoropropylene, and 2,3,3,3-tetrafluoropropylene can all achieve the purpose of this disclosure. According to an optional embodiment of this disclosure, the fluorinated olefin is selected from one or more of 1,1,2-trifluoroethylene, trans-1,3,3,3-tetrafluoropropylene, and trans-1,2-difluoroethylene.

[0035] In this disclosure, the range of alkanes is relatively wide, and all C1-C4 alkanes can achieve the objectives of this disclosure. According to an optional embodiment of this disclosure, the alkanes are selected from one or more of propane and isobutane.

[0036] In this disclosure, the range of selectable contents for substance IV is relatively wide. The following is an illustrative description, but it does not limit the scope of this disclosure. According to one optional embodiment of this disclosure, the content of substance IV, based on the total mass of the composition, is 0.1-6 wt%, for example, it can be 0.5 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, or 5 wt%.

[0037] The substance IV with the aforementioned characteristics can further improve the CAP and COP of the heat transfer composition provided by the present disclosure, and make the heat exchange effect better.

[0038] In the present disclosure, the heat transfer composition can achieve the purpose of the present disclosure as long as it has the aforementioned technical characteristics, and there is no special requirement for its preparation method. The preparation method of the heat transfer composition is exemplarily described below, but this does not limit the scope of the present disclosure. For example, halogenated methane I, fluorinated propylene II, fluorinated ethane III and optional substance IV are mixed in a liquid state.

[0039] The present disclosure provides the application of the heat transfer composition described in the present disclosure, which includes: the heat transfer composition as a working fluid circulating in a heat exchange device.

[0040] In the present disclosure, the heat exchange device has no special requirement, and the commonly used types can achieve the purpose of the present disclosure. According to an optional embodiment of the present disclosure, the heat exchange device is selected from one of the heat exchange devices for household, commercial, heat pump system, refrigeration equipment, industrial refrigeration, automobile, data center and mobile refrigeration equipment.

[0041] The heat transfer composition of the present disclosure is particularly suitable as a substitute for heat transfer composition R410A or R404A.

[0042] The application of the heat transfer composition with the aforementioned characteristics can adapt to various heat exchange devices during application, and can achieve the direct replacement of heat transfer composition R410A or R404A without the need to modify or replace the original heat exchange device, and the application cost is low.

[0043] The above describes optional embodiments of the present disclosure, but the present disclosure is not limited thereto. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, including the combination of various specific technical characteristics in any suitable manner. In order to avoid unnecessary repetition, the present disclosure does not further describe various possible combination manners. However, these simple modifications and combinations should also be regarded as the disclosed content of the present disclosure, and belong to the protection scope of the present disclosure.

[0044] The present disclosure will be described in detail by the following examples. It is necessary to point out here that the following examples are only used to further illustrate the present disclosure, and cannot be understood as a limitation on the protection scope of the present disclosure. Those skilled in the art can make some non-essential improvements and adjustments to the present disclosure according to the above disclosure.

[0045] The average boiling point, relative CAP and relative COP in the examples and comparative examples are obtained by theoretical calculation using the National Institute of Standards and Technology, Fluid Thermodynamics and Transport Properties Database Refprop 10.0.

[0046] Average boiling point: Average of the vapor-liquid phase temperatures of a composition at one standard atmosphere (101.3 kPa).

[0047] CAP: The product of the latent heat value and the vapor density of a composition under refrigeration and heating cycle conditions.

[0048] COP: The ratio of the refrigeration (or heating) capacity to the power consumption of a compressor of a composition under refrigeration (or heating) cycle conditions with an evaporating temperature of 5°C, a condensing temperature of 45°C, a superheating temperature of 10 K, a subcooling temperature of 5 K, and a compressor efficiency of 70%.

[0049] Relative CAP, Relative COP: The ratio of the values of the CAP, COP of a composition to the CAP, COP of R454B.

[0050] The GWP values in the examples and comparative examples are calculated from the GWP values of the respective components by weighted average according to the mass fraction. The GWP values of the components are taken from the Fifth Assessment Report of the Intergovernmental Panel on Climate Change of the United Nations.

[0051] Example 1

[0052] The following components are mixed in the liquid phase to obtain a heat transfer composition: 85 g difluoromethane, 10 g 3,3,3-trifluoropropene, 5 g 1,1-difluoroethane.

[0053] Example 2

[0054] The following components are mixed in the liquid phase to obtain a heat transfer composition: 85 g difluoromethane, 5 g 3,3,3-trifluoropropene, 10 g 1,1-difluoroethane.

[0055] Example 3

[0056] The following components are mixed in the liquid phase to obtain a heat transfer composition: 90 g difluoromethane, 5 g 3,3,3-trifluoropropene, 5 g 1,1-difluoroethane.

[0057] Example 4

[0058] The following components are mixed in the liquid phase to obtain a heat transfer composition: 84 g difluoromethane, 15 g hexafluoropropene, 1 g 1,1-difluoroethane.

[0059] Example 5

[0060] The following components are mixed in the liquid phase to obtain a heat transfer composition: 85 g difluoromethane, 5 g hexafluoropropene, 10 g 1,1-difluoroethane.

[0061] Example 6

[0062] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 90 g difluoromethane, 5 g hexafluoropropene, 5 g 1,1-difluoroethane, 3 g trans-1,3,3,3-tetrafluoropropene.

[0063] Example 7

[0064] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 85 g difluoromethane, 5 g 2,3,3,3-tetrafluoropropene, 10 g 1,1-difluoroethane.

[0065] Example 8

[0066] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 90 g difluoromethane, 5 g 2,3,3,3-tetrafluoropropene, 5 g 1,1-difluoroethane, 3 g trans-1,3,3,3-tetrafluoropropene.

[0067] Example 9

[0068] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 81 g difluoromethane, 15 g 3,3,3-trifluoropropene, 4 g 1,1-difluoroethane, 3 g carbon dioxide.

[0069] Example 10

[0070] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 88 g difluoromethane, 5 g 3,3,3-trifluoropropene, 7 g 1,1-difluoroethane.

[0071] Example 11

[0072] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 87 g difluoromethane, 5 g hexafluoropropene, 8 g 1,1-difluoroethane.

[0073] Example 12

[0074] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 90 g difluoromethane, 5 g 2,3,3,3-tetrafluoropropene, 5 g 1,1-difluoroethane.

[0075] Example 13

[0076] The following components are mixed in the liquid phase state to obtain a heat transfer composition: 80 g difluoromethane, 5 g 2,3,3,3-tetrafluoropropene, 15 g 1,1-difluoroethane, 6 g propane.

[0077] Example 14

[0078] The following components are mixed in the liquid phase to give a heat transfer composition: 88 g difluoromethane, 5 g 3,3,3-trifluoropropene, 7 g fluoroethane.

[0079] Example 15

[0080] The following components are mixed in the liquid phase to give a heat transfer composition: 84 g difluoromethane, 15 g 3,3,3-trifluoropropene, 1 g 1,1,1,2-tetrafluoroethane.

[0081] Comparative Example 1

[0082] The heat transfer composition is R410A.

[0083] Comparative Example 2

[0084] The heat transfer composition is R404A.

[0085] Comparative Example 3

[0086] The heat transfer composition is R454B.

[0087] Table 1 Region of Example

[0088] Table 2 Average boiling point, CAP, COP, GWP of Examples and Comparative Examples

Claims

1. A heat transfer composition comprising: halogenated methane I, fluorinated propene II, fluorinated ethane III, the content of halogenated methane I is x wt%, the content of fluorinated propene II is y wt%, the content of fluorinated ethane III is z wt%, in a composition ternary diagram, the coordinates (x, y, z) are on the self, straight line segment AB, straight line segment BC, straight line segment CA and the triangular region enclosed by the straight line segments of point A (75.1, 23.9, 1.0), point B (75.1, 5.0, 19.9) and point C (94.0, 5.0, 1.0).

2. The heat transfer composition of claim 1, wherein, halogenated methane I is difluoromethane; fluorinated propene II is selected from one or more of 3,3,3-trifluoropropene, hexafluoropropene and 2,3,3,3-tetrafluoropropene; fluorinated ethane III is selected from one or more of monofluoroethane, 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane and pentafluoroethane.

3. The heat transfer composition of claim 1 or 2 wherein, when fluorinated propene II is 3,3,3-trifluoropropene, in a composition ternary diagram, The coordinates (x, y, z) lie on the straight line segment AD, the curve segment DE (x, 0.0074089x 2 - 2.6855x + 176.093, -0.0074089x 2 + 1.6855x - 76.093), the straight line segment EC, the straight line segment CA and the area enclosed by said line segments; optionally, The coordinates (x, y, z) lie on the straight line segment CF, the curve segment FG (x, 0.023594x 2 -5.6878x + 321.331, -0.023594x 2 + 4.6878x - 221.331), the straight line segment GC and the area enclosed by said line segments.

4. The heat transfer composition of any of claims 1-3 wherein, when fluorinated propene II is 3,3,3-trifluoropropene, in a composition ternary diagram, The coordinates (x, y, z) lie on the straight line segment BH, the curve segment HI (x, 0.0047469x 2 - 2.0895x + 152.759, -0.0047469x 2 + 1.0895x - 52.759), the straight line segment IB and the area enclosed by said line segments; optionally, the coordinates (x, y, z) are on the self, straight line segment CF, curve segment FG, straight line segment GC and the region enclosed by the straight line segments of point C, point F and point G, the intersection of the self, straight line segment BH, curve segment HI, straight line segment IB and the region enclosed by the straight line segments of point B, point H and point I.

5. The heat transfer composition of claim 1 or 2 wherein, when fluorinated propene II is hexafluoropropene, in a composition ternary diagram, The coordinates (x, y, z) lie within the points A(75.1, 23.9, 1.0), C(94.0, 5.0, 1.0), D'(75.1, 13.6, 11.3), and E'(81.9, 5.0, 13.1), the line segment AD', and the curve segment D'E'(x, -0.0006946x). 2 -1.1682x + 105.257, 0.0006946x 2 +0.1682x-5.257), on the area enclosed by line segment E'C, line segment CA, and the line segment; optionally, The coordinates (x, y, z) lie on the straight line segment AF', the curved segment F'G' (x, 0.0028304x 2 -1.7321x + 133.303, -0.0028304x 2 +0.7321x - 33.303), the straight line segment G'C, the straight line segment CA and the area enclosed by said line segments.

6. The heat transfer composition of claim 1 or 2 wherein, when fluorinated propene II is hexafluoropropene, in a composition ternary diagram, The coordinates (x, y, z) lie on the straight line segment BH', the curve segment H'I' (x, 0.0044568x 2 -1.7837x + 128.996, -0.0044568x 2 + 0.7837x - 28.996), the straight line segment I'B and the area enclosed by said line segments; optionally, the coordinates (x, y, z) are on the self, straight line segment AF', curve segment F'G', straight line segment G'C, straight line segment CA and the region enclosed by the straight line segments of point A, point C, point F' and point G', the intersection of the self, straight line segment BH', curve segment H'I', straight line segment I'B and the region enclosed by the straight line segments of point B, point H', point I'.

7. The heat transfer composition of claim 1 or 2 wherein, when fluorinated propene II is 2,3,3,3-tetrafluoropropene, in a composition ternary diagram, The coordinates (x, y, z) lie on the straight line segment AD", the curved segment D"E" (x, 0.0008961x 2 -1.4673x + 119.098, -0.0008961x 2 + 0.4673x - 19.098), the straight line segment E"C, the straight line segment CA and the area enclosed by said line segments.

8. The heat transfer composition of claim 1 or 2 wherein, when fluorinated propene II is 2,3,3,3-tetrafluoropropene, in a composition ternary diagram, The coordinates (x, y, z) lie on the straight line segment AB, the straight line segment BH", the curve segment H"I" (x, 2.2978x + 396.304x - 17078.778), the straight line segment I"A and the area enclosed by said line segments. 2 -397.304x + 17178.778, -2.2978x 2 +396.304x - 17078.778), the straight line segment I"A and the area enclosed by said line segments. optionally, the coordinates (x, y, z) are on the self, straight line segment AD", curve segment D"E", straight line segment E"C, straight line segment CA and the region enclosed by the straight line segments of point A, point C, point D" and point E", the intersection of the self, straight line segment AB, straight line segment BH", curve segment H"I", straight line segment I"A and the region enclosed by the straight line segments of point A, point B, point H", point I".

9. The heat transfer composition of any of claims 1-8 wherein, the composition further comprises: a substance IV, the substance IV being selected from one or more of fluorinated olefin other than 3,3,3-trifluoropropene, hexafluoropropene and 2,3,3,3-tetrafluoropropene, C1-C4 alkane, trifluoroiodomethane, carbon dioxide and dimethyl ether; optionally, the fluorinated olefin is selected from one or more of 1,1,2-trifluoroethene, trans-1,3,3,3-tetrafluoropropene and trans-1,2-difluoroethene; and / or said C1-C4 alkane is selected from one or more of propane and isobutane; and / or the content of substance IV is 0.1 to 6 wt.-%, based on the total mass of the composition.

10. Use of a heat transfer composition as described in any one of claims 1 to 9, circulating as a working fluid in a heat exchange apparatus; optionally, the heat exchange apparatus is selected from one of a domestic, commercial, heat pump system, refrigeration equipment, industrial refrigeration, automotive, data center, and mobile refrigeration equipment heat exchange apparatus; and / or the heat transfer composition is a replacement for heat transfer composition R410A or R404A.

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