CN114702938A - Mixed refrigerant and air conditioning system - Google Patents
Mixed refrigerant and air conditioning system Download PDFInfo
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- CN114702938A CN114702938A CN202210409741.XA CN202210409741A CN114702938A CN 114702938 A CN114702938 A CN 114702938A CN 202210409741 A CN202210409741 A CN 202210409741A CN 114702938 A CN114702938 A CN 114702938A
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
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Abstract
The invention provides a mixed refrigerant and an air conditioning system, wherein the mixed refrigerant comprises a first component, a second component and a third component, wherein: the first component is trifluoroiodomethane, the second component is difluoromethane, and the third component is 1, 1-difluoroethane. The mixed refrigerant can reduce the emission of non-carbon dioxide greenhouse gases on the premise of ensuring the safety and the system performance, effectively solves the problem of higher GWP of other refrigerants, and simultaneously solves the problem of poor thermal performance of other refrigerants.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to a mixed refrigerant and an air conditioning system.
Background
Since 1850, global temperature has risen by nearly 1.5 ℃, glaciers and frozen earth have ablated, sea level has risen, and ecological balance has suffered severe damage. HFC substances are mainly used as refrigerants to be widely applied to occasions such as household air conditioners, freezing and refrigerating units, commercial water chilling units and the like, wherein the annual output of the household air conditioners is nearly 1.5 hundred million, the main refrigerants are R32 and R410A, R32 accounts for more than 60 percent, the GWP (potential greenhouse effect value) reported by the latest IPCC evaluation at the sixth time is 771, and the emission reduction space is huge.
Because the technical problems that the refrigerant in the prior art cannot simultaneously ensure low GWP value and high thermal performance (including COP, volume refrigerating capacity and the like) and the like, the invention researches and designs a mixed refrigerant and an air-conditioning system.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect that the refrigerants in the prior art cannot simultaneously ensure low GWP value and high thermal performance, thereby providing a mixed refrigerant and an air conditioning system.
The present invention provides a mixed refrigerant, wherein:
comprising a first component, a second component and a third component, wherein: the first component is trifluoroiodomethane, the second component is difluoromethane, and the third component is 1, 1-difluoroethane.
In some embodiments, the trifluoroiodomethane occupies 2 to 58% by mass of the mixed refrigerant, the difluoromethane occupies 40 to 96% by mass of the mixed refrigerant, and the 1, 1-difluoroethane occupies 2 to 12% by mass of the mixed refrigerant.
In some embodiments, a fourth component that is trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) is also included.
In some embodiments, the trifluoroiodomethane accounts for 2 to 54% by mass of the mixed refrigerant, the difluoromethane accounts for 40 to 94% by mass of the mixed refrigerant, the 1, 1-difluoroethane accounts for 2 to 10% by mass of the mixed refrigerant, and the trans-1, 3,3, 3-tetrafluoropropene accounts for 2 to 16% by mass of the mixed refrigerant.
In some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, and 1, 1-difluoroethane is 0.02:0.86: 0.12; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.02:0.96: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.08:0.88: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.10:0.84: 0.06.
In some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, and 1, 1-difluoroethane is 0.16:0.72: 0.10; alternatively, the first and second liquid crystal display panels may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.20:0.70: 0.10; alternatively, the first and second liquid crystal display panels may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.28:0.66: 0.06; alternatively, the first and second liquid crystal display panels may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.36:0.58: 0.06.
In some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, and 1, 1-difluoroethane is 0.40:0.52: 0.08; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.48:0.50: 0.02; alternatively, the first and second liquid crystal display panels may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.54:0.42: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.58:0.40: 0.02.
In some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane, and trans-1, 3,3, 3-tetrafluoropropene is 0.02:0.80:0.02: 0.16; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.02:0.94:0.02: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.08:0.80:0.04: 0.08; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.14:0.76:0.04: 0.06.
In some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane, and trans-1, 3,3, 3-tetrafluoropropene is 0.18:0.70:0.10: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.24:0.64:0.08: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.26:0.68:0.02: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.30:0.64:0.02: 0.04.
In some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane, and trans-1, 3,3, 3-tetrafluoropropene is 0.36:0.56:0.04: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.44:0.52:0.02: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.48:0.44:0.04: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.54:0.40:0.02: 0.04.
The invention also provides an air conditioning system which comprises the mixed refrigerant.
In some embodiments, the operation conditions of the mixed refrigerant are as follows: the evaporation temperature is 263.15K-293.15K K, the condensation temperature is 303.15K-323.15K, the gas phase at the outlet of the evaporator is in an overheated state, the degree of superheat is 0-10K, the liquid phase at the outlet of the condenser is in a supercooled state, and the degree of supercooling is 0-10K.
The mixed refrigerant and the air conditioning system provided by the invention have the following beneficial effects:
the invention provides a ternary or quaternary environment-friendly mixed refrigerant and an air-conditioning system using the same, namely trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically mixed according to corresponding mass ratio under the state of normal temperature liquid phase (can also comprise trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E))), the mixed refrigerant has low GWP and good thermal performance, the GWP value is lower than 750, the mixed refrigerant has obvious environment-friendly advantages, the capacity and the energy efficiency of the refrigerant unit are equivalent to those of the refrigerant using R32, the safety level is basically equivalent to or even better than that of R32, the refrigerant can reduce the emission of non-carbon dioxide greenhouse gas on the premise of ensuring the safety and the system performance, and effectively solves the problem that the GWP of other refrigerants is higher, meanwhile, the problem of poor thermal performance of other refrigerants is solved. And the sliding temperature of the mixed working medium is low, the adverse effect caused by temperature sliding is eliminated, and the potential safety hazard caused by combustible refrigerants can be reduced or even eliminated by the air conditioning system.
Detailed Description
The present invention provides a mixed refrigerant, wherein:
comprising a first component, a second component and a third component, wherein: the first component is trifluoroiodomethane (R13I1), the second component is difluoromethane (R32), and the third component is 1, 1-difluoroethane (R152 a).
The invention provides a ternary environment-friendly mixed refrigerant and an air-conditioning system using the same, namely trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically mixed according to corresponding mass ratio under the state of normal temperature liquid phase (can also comprise trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E))), the mixed refrigerant has low GWP and good thermal performance, the GWP value is lower than 750, the mixed refrigerant has obvious environment-friendly advantages, the capacity and the energy efficiency of a unit using the refrigerant are equivalent to those of a unit using R32 refrigerant, the safety level is basically equivalent to or even better than that of R32, the refrigerant can reduce the emission of non-carbon dioxide greenhouse gas on the premise of ensuring the safety and the system performance, and the problem of higher GWP of other refrigerants is effectively solved, meanwhile, the problem of poor thermal performance of other refrigerants is solved. And the sliding temperature of the mixed working medium is low, the adverse effect caused by temperature sliding is eliminated, and the potential safety hazard caused by combustible refrigerants can be reduced or even eliminated by the air conditioning system.
Preferably, the trifluoroiodomethane accounts for 2-58% of the mixed refrigerant by mass, the difluoromethane accounts for 40-96% of the mixed refrigerant by mass, and the 1, 1-difluoroethane accounts for 2-12% of the mixed refrigerant by mass. The environment-friendly mixed refrigerant comprises, by mass, 2-58% of trifluoroiodomethane (R13I1), 40-96% of difluoromethane (R32) and 2-12% of 1, 1-difluoroethane (R152 a). Under the condition that the three components meet the mass ratio, the environment-friendly mixed refrigerant has good thermal performance (COP and volume refrigerating capacity), low GWP and optimal comprehensive performance in two aspects.
In some embodiments, the invention also includes a fourth component that is trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)). Namely, the present invention provides an environment-friendly mixed refrigerant comprising a first component, a second component, a third component and a fourth component, wherein: the first component is trifluoroiodomethane (R13I1), the second component is difluoromethane (R32), the third component is 1, 1-difluoroethane (R152a), and the fourth component is trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)).
In some embodiments, the eco-friendly mixed refrigerant includes, in mass percent, 2 to 54% trifluoroiodomethane (R13I1), 40 to 94% difluoromethane (R32), 2 to 10% 1, 1-difluoroethane (R152a), and 2 to 16% trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)).
The invention provides an environment-friendly mixed refrigerant applied to a household air conditioner. The preparation method is that the trifluoroiodomethane (R13I1), the difluoromethane (R32), the 1, 1-difluoroethane (R152a) and the trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) are physically mixed according to the corresponding mass ratio under the state of normal temperature and liquid phase. The basic parameters of each component are shown in Table 1.
TABLE 1 basic parameters of the constituent substances in the mixed working fluid
The GWP of the ternary or quaternary mixed refrigerant is less than 750, the capacity and the energy efficiency of the refrigerant unit are equivalent to those of a unit using R32 refrigerant, and the safety level is basically equivalent to or even better than that of R32. The preferable combination mass ratio is as follows:
TABLE 2 preferred mixture ratio by mass
Preferably, the first and second electrodes are formed of a metal,
example 1 (formulation 1), in some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane and 1, 1-difluoroethane is 0.02:0.86:0.12, i.e., three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed according to the mass ratio of 0.02:0.86:0.12 to obtain an environment-friendly mixed working medium.
In example 2 (formulation 2), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.02:0.96:0.02, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.02:0.96:0.02, so as to obtain an environment-friendly mixed working medium.
In example 3 (formulation 3), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.08:0.88:0.04, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed according to the mass ratio of 0.08:0.88:0.04, so as to obtain an environment-friendly mixed working medium.
In example 4 (formulation 4), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.10:0.84:0.06, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.10:0.84:0.06, so as to obtain an environment-friendly mixed working medium.
Example 5 (formulation 5), in some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane and 1, 1-difluoroethane is 0.16:0.72:0.10, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a mass ratio of 0.16:0.72:0.10 to obtain an environment-friendly mixed working medium.
In example 6 (formulation 6), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.20:0.70:0.10, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.20:0.70:0.10 to obtain an environment-friendly mixed working medium.
In example 7 (formulation 7), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.28:0.66:0.06, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.28:0.66:0.06, so as to obtain an environment-friendly mixed working medium.
In example 8 (formulation 8), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.36:0.58:0.06, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.36:0.58:0.06, so as to obtain an environment-friendly mixed working medium.
Example 9 (formulation 9), in some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane and 1, 1-difluoroethane is 0.40:0.52:0.08, namely trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed according to the mass ratio of 0.40:0.52:0.08 to obtain an environment-friendly mixed working medium.
In example 10 (formulation 10), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.48:0.50:0.02, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.48:0.50:0.02, so as to obtain an environment-friendly mixed working medium.
In example 11 (formulation 11), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.54:0.42:0.04, that is, trifluoroiodomethane (R13I1), difluoromethane (R32), and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.54:0.42:0.04, so as to obtain an environment-friendly mixed working medium.
In example 12 (formulation 12), the mass ratio of trifluoroiodomethane to difluoromethane to 1, 1-difluoroethane is 0.58:0.40:0.02, that is, three components of trifluoroiodomethane (R13I1), difluoromethane (R32) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in the mass ratio of 0.58:0.40:0.02, so as to obtain an environment-friendly mixed working medium.
Example 13 (formulation 13), in some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene is 0.02:0.80:0.02:0.16, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) are physically mixed uniformly in a mass ratio of 0.02:0.80:0.02:0.16 to obtain an environmentally friendly mixed working fluid.
Example 14 (formulation 14), the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.02:0.94:0.02:0.02, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in a mass ratio of 0.02:0.94:0.02:0.02 to obtain an environment-friendly mixed working fluid.
Example 15 (formulation 15), the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.08:0.80:0.04:0.08, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in the mass ratio of 0.08:0.80:0.04:0.08 to obtain an environmentally friendly mixed working medium.
Example 16 (formulation 16), the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.14:0.76:0.04:0.06, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in the mass ratio of 0.14:0.76:0.04:0.06, to obtain an environmentally friendly mixed working fluid.
Example 17 (formulation 17), in some embodiments, the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene is 0.18:0.70:0.10:0.02, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) are physically mixed uniformly in a mass ratio of 0.18:0.70:0.10:0.02 to obtain an environmentally friendly mixed working fluid.
Example 18 (formulation 18), the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane, and trans-1, 3,3, 3-tetrafluoropropene was 0.24:0.64:0.08:0.04, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a), and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in a mass ratio of 0.24:0.64:0.08:0.04 to obtain an environmentally friendly mixed working fluid.
Example 19 (formulation 19) the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.26:0.68:0.02:0.04, i.e. four components of trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in a mass ratio of 0.26:0.68:0.02:0.04 to obtain an environmentally friendly mixed working fluid.
Example 20 (formulation 20), the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.30:0.64:0.02:0.04, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in the mass ratio of 0.30:0.64:0.02:0.04 to obtain an environmentally friendly mixed working medium.
Example 21 (formulation 21), in some embodiments the trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene mass ratio is 0.36:0.56:0.04:0.04, i.e. trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) are physically mixed uniformly in a mass ratio of 0.36:0.56:0.04:0.04 to give an environmentally friendly mixed working fluid.
Example 22 (formulation 22), the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.44:0.52:0.02:0.02, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in the mass ratio of 0.44:0.52:0.02:0.02 to obtain an environmentally friendly mixed working medium.
Example 23 (formulation 23) the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.48:0.44:0.04:0.04, i.e. trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in the mass ratio of 0.48:0.44:0.04:0.04 to obtain an environmentally friendly working mixture.
Example 24 (formulation 24), the mass ratio of trifluoroiodomethane, difluoromethane, 1-difluoroethane and trans-1, 3,3, 3-tetrafluoropropene was 0.54:0.40:0.02:0.04, i.e., trifluoroiodomethane (R13I1), difluoromethane (R32), 1-difluoroethane (R152a) and trans-1, 3,3, 3-tetrafluoropropene (R1234ze (E)) were physically mixed uniformly in the mass ratio of 0.54:0.40:0.02:0.04 to obtain an environmentally friendly mixed working medium.
The ternary or quaternary mixed refrigerant is used for replacing R32, and the selected design working conditions are as follows: the evaporation temperature of the evaporator (the arithmetic mean value of the temperature of the inlet of the evaporator and the dew point temperature under the corresponding pressure) is 263.15K-293.15K (preferably 283.15K), the condensation temperature of the condenser (the arithmetic mean value of the temperature of the dew point and the temperature of the bubble point in the condenser) is 303.15K-323.15K (preferably 313.15K), the gas phase at the outlet of the evaporator is in a superheated state, the degree of superheat is 5K, the liquid phase at the outlet of the condenser is in a supercooled state, the degree of supercooling is 5K, and the adiabatic efficiency of the compressor is 0.75. Using the above examples and the theoretical calculations of the cycle performance parameters of R32 refrigerant in a refrigeration system, the physical data were taken from REFPROP 10.0, where GWP (calculated as linear sum of mass percentages) was compared, relative refrigerating capacity per unit volume Qv (ratio of refrigerating capacity per unit volume to R32), relative coefficient of performance COP (ratio of coefficient of performance to R32), compressor discharge temperature, compressor pressure ratio and safety rating, which were classified according to ASHRAE 34-2019 as a (low toxicity), B (high toxicity), 1 (no flame propagation), 2L (micro-flammability), 2 (flammability) and 3 (flammability), and the results are shown in the following table:
TABLE 3 comparison of the respective Performance indices
Qv and COP both reflect refrigeration capacity, but an excellent refrigerant needs to simultaneously meet the requirements of lower GWP, higher Qv and COP. Compared with the prior art, the refrigerant has low volume refrigerating capacity index due to large GWP reduction amplitude, and cannot be used as a substitute refrigerant in household air conditioners.
As can be seen from the table above, all refrigerant formulations have GWP less than 750, and have better environmental protection characteristic; the relative unit volume refrigerating capacity of all refrigerant formulas is not lower than 0.9, the relative performance coefficient is not lower than 0.95, and the temperature slippage is not higher than 5K; the compressor pressure ratio and discharge temperature of all refrigerant formulations are similar to those of R32, and the safety grade is equivalent to or even better than that of R32. If one of the three components is not in the mass ratio provided by the application, the volume refrigerating capacities of the comparative examples 1-6 are lower than 80% of R32, and the temperature slips of the comparative examples 2-6 are larger than 5K.
Therefore, the mixed working medium provided by the invention can better replace the R32 refrigerant.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (12)
1. A mixed refrigerant characterized by:
comprising a first component, a second component and a third component, wherein: the first component is trifluoroiodomethane, the second component is difluoromethane, and the third component is 1, 1-difluoroethane.
2. The mixed refrigerant according to claim 1, characterized in that:
the mass ratio of the trifluoroiodomethane to the mixed refrigerant is 2-58%, the mass ratio of the difluoromethane to the mixed refrigerant is 40-96%, and the mass ratio of the 1, 1-difluoroethane to the mixed refrigerant is 2-12%.
3. The mixed refrigerant according to claim 1, characterized in that:
the composition also comprises a fourth component which is trans-1, 3,3, 3-tetrafluoropropene.
4. The mixed refrigerant of claim 3, wherein:
the mass ratio of the trifluoroiodomethane to the mixed refrigerant is 2-54%, the mass ratio of the difluoromethane to the mixed refrigerant is 40-94%, the mass ratio of the 1, 1-difluoroethane to the mixed refrigerant is 2-10%, and the mass ratio of the trans-1, 3,3, 3-tetrafluoropropene to the mixed refrigerant is 2-16%.
5. The mixed refrigerant according to claim 2, characterized in that:
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.02:0.86: 0.12; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.02:0.96: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.08:0.88: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.10:0.84: 0.06.
6. The mixed refrigerant according to claim 2, characterized in that:
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.16:0.72: 0.10; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.20:0.70: 0.10; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.28:0.66: 0.06; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.36:0.58: 0.06.
7. The mixed refrigerant according to claim 2, characterized in that:
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.40:0.52: 0.08; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.48:0.50: 0.02; alternatively, the first and second liquid crystal display panels may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.54:0.42: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane is 0.58:0.40: 0.02.
8. The mixed refrigerant of claim 4, wherein:
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.02:0.80:0.02: 0.16; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.02:0.94:0.02: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.08:0.80:0.04: 0.08; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.14:0.76:0.04: 0.06.
9. The mixed refrigerant of claim 4, wherein:
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.18:0.70:0.10: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.24:0.64:0.08: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.26:0.68:0.02: 0.04; alternatively, the first and second liquid crystal display panels may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.30:0.64:0.02: 0.04.
10. The mixed refrigerant of claim 4, wherein:
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.36:0.56:0.04: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.44:0.52:0.02: 0.02; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.48:0.44:0.04: 0.04; alternatively, the first and second electrodes may be,
the mass ratio of the trifluoroiodomethane to the difluoromethane to the 1, 1-difluoroethane to the trans-1, 3,3, 3-tetrafluoropropene is 0.54:0.40:0.02: 0.04.
11. An air conditioning system characterized by:
comprising the mixed refrigerant according to any one of claims 1 to 10.
12. The air conditioning system of claim 11, wherein:
the operation conditions of the mixed refrigerant are as follows: the evaporation temperature is 263.15K-293.15K, the condensation temperature is 303.15K-323.15K, the gas phase at the outlet of the evaporator is in an overheated state, the degree of superheat is 0-10K, the liquid phase at the outlet of the condenser is in a supercooled state, and the degree of supercooling is 0-10K.
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