# US 11,078,392 B2 · Lower GWP refrigerant compositions

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- Number: US 11,078,392 B2
- Document ID: US11078392B2
- Status: Granted
- Kind: B2
- Application number: 15/858,896
- Filed: 2017-12-29
- Published: 2019-07-04
- Granted: 2021-08-03
- Earliest claimed: 2017-12-29
- Assignees: Trane International Inc.
- Applicants: Trane International Inc.
- Inventors: Kenneth J. Schultz; Stephen A. Kujak
- Web page: https://patentgrep.com/patent/US11078392B2

## CPC

- C09K 5/044: {comprising halogenated compounds}
- C09K 5/045: {containing only fluorine as halogen}
- F25B 45/00: Arrangements for charging or discharging refrigerant
- C09K 2205/122: Halogenated hydrocarbons
- C09K 2205/126: Unsaturated fluorinated hydrocarbons
- C09K 2205/22: All components of a mixture being fluoro compounds
- C09K 2205/40: Replacement mixtures
- F25B 2400/121: using R1234
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS

## Abstract

A non-flammable refrigerant composition for a HVACR system that includes R134a refrigerant, a hydrofluorocarbon refrigerant that has a global warming potential (GWP) of less than 150 or a hydrofluoroolefin refrigerant, and CF3I. A method of making a refrigerant composition for a HVACR system that includes selecting an amount of a first refrigerant that is a hydrofluorocarbon refrigerant or a hydrofluoroolefin refrigerant, selecting an amount of CF3I, and selecting an amount of R134a refrigerant. A method of retrofitting a refrigerant composition in an HVACR system that includes adding one or more compounds to the refrigerant composition. The retrofitted composition including R134a refrigerant, a hydrofluorocarbon refrigerant having a GWP of less than 150, and CF3I, or R134a refrigerant, a hydrofluoroolefin refrigerant, and CF3I.

## Claims

### Claim 1

A non-flammable refrigerant composition for a HVACR system, the non-flammable refrigerant composition comprising:
from about 2 wt % to about 68 wt % of R1234yf refrigerant;
about 63.7 wt %, or greater than 0 wt % and less than 63.7 wt % of CF3I; and
from about 9.8 wt % to about 46 wt % of R134a refrigerant, wherein
the non-flammable refrigerant composition has a GWP of less than 600 and a capacity that is equal to or greater than a capacity of R134a refrigerant alone.

### Claim 2 (depends on 1)

The non-flammable refrigerant composition of claim 1, wherein the GWP of the non-flammable refrigerant is less than 150.

### Claim 3 (depends on 1)

The non-flammable refrigerant composition of claim 1, wherein the non-flammable refrigerant composition has a temperature glide that is equal to or less than 1.0° C.

### Claim 4

A non-flammable refrigerant composition for a HVACR system, the non-flammable refrigerant composition comprising:
about 54.8 wt %, or greater than 0 wt % and less than 54.8 wt % of R1234ze(E) refrigerant;
from about 4.5 wt % to about 91 wt % of CF3I; and
from about 1.9 wt % to about 46 wt % of R134a refrigerant, wherein
the non-flammable refrigerant composition has a GWP of less than 600 and a capacity that is equal to or greater than 90% of a capacity of R134a refrigerant alone.

### Claim 5

A non-flammable refrigerant composition for a HVACR system, the non-flammable refrigerant composition comprising:
R152a refrigerant from about 1% to about 30% by weight of the non-flammable refrigerant composition;
CF3I from about 33.9% to about 78.6% by weight of the non-flammable refrigerant composition; and
R134a refrigerant being about 46% by weight or less than 46% by weight of the non-flammable refrigerant composition, wherein
the non-flammable refrigerant composition has a GWP of less than 600, a capacity that is equal to or greater than 90% of a capacity of R134a refrigerant alone, and a temperature glide that is equal to or less than 1.0° C.

### Claim 6

A method of making a refrigerant composition for a HVACR system, the method comprising:
mixing an amount of a first refrigerant, an amount of CF3I, and an amount of R134a refrigerant, wherein
the first refrigerant is one of:
R152a refrigerant, such that the refrigerant composition includes from about 1 wt % to about 30 wt % of the R152a refrigerant from about 33.9 wt % to about 78.6 wt % of the CF3I; and about 46 wt %, or less than 46 wt % and greater than 0 wt % of the R134a refrigerant,
R1234yf refrigerant, such that the refrigerant composition includes from about 2 wt % to about 68 wt % of the R1234yf refrigerant about 63.7 wt %, or greater than 0 wt % and less than 63.7 wt % of the CF3I; and from about 9.8 wt % to about 46 wt % of the R134a refrigerant, or
R1234ze(E) refrigerant, such that the refrigerant composition includes about 54.8 wt %, or greater than 0 wt % and less than 54.8 wt % of the R1234ze(E) refrigerant; from about 4.5 wt % to about 91 wt % of CF3I; and from about 1.9 wt % to about 46 wt % of the R134a refrigerant,
the refrigerant composition is non-flammable and has a GWP of less than 600 and a capacity that is equal to or greater than 90% of a capacity of R134a refrigerant alone.

### Claim 7 (depends on 6)

The method of claim 6, wherein the GWP of the refrigerant composition is less than 150.

### Claim 8

A method of retrofitting a refrigerant composition in an HVACR system, comprising:
adding one or more compounds to the refrigerant composition resulting in a retrofitted refrigerant composition that is one of:
a first retrofitted refrigerant composition including: from about 1 wt % to about 30 wt % of R152a refrigerant; from about 33.9 wt % to about 78.6 wt % of CF3I; and about 46 wt %, or greater than 0 wt % and less than 46 wt % of R134a refrigerant, or
a second retrofitted refrigerant composition including: from about 2 wt % to about 68 wt % of R1234yf refrigerant; about 63.7 wt %, or greater than 0 wt % and less than 63.7 wt % of the CF3I; and from about 9.8 wt % to about 46 wt % of the R134a refrigerant, or
a third retrofitted refrigerant composition including: about 54.8 wt %, or greater than 0 wt % and less than 54.8 wt % of R1234ze(E); from about 4.5 wt % to about 91 wt % of the CF3I; and about 1.9 wt % to about 46 wt % of the R134 refrigerant, wherein
when the retrofitted refrigerant composition is the first retrofitted refrigerant composition, and the refrigerant composition including the R134a refrigerant, adding one or more compounds includes:
adding an amount of the CF3I so that the retrofitted refrigerant composition is non-flammable, and
adding an amount of the R152a refrigerant so that a GWP of the retrofitted refrigerant composition is less than 600, or
when the retrofitted refrigerant composition is the first retrofitted refrigerant composition, and the refrigerant composition including the R152a refrigerant and the CF3I, adding one or more compounds includes:
adding an amount of the R134a refrigerant to address capacity, the amount of the R134a refrigerant being selected so that a GWP of the retrofitted refrigerant composition is less than 600, or
when the retrofitted refrigerant composition is the second retrofitted refrigerant composition or the third retrofitted refrigerant composition, and the refrigerant composition including the R134a refrigerant, adding one or more compounds includes:
adding an amount of the CF3I to the refrigerant composition so that the retrofitted refrigerant composition is non-flammable, and
adding an amount of the R1234yf refrigerant or the R1234ze(E) refrigerant to the refrigerant composition so that a GWP of the retrofitted refrigerant composition is less than 600, or
when the retrofitted refrigerant composition is the second retrofitted refrigerant composition or the third retrofitted refrigerant composition, and the refrigerant composition including the CF3I and the R1234yf refrigerant or the R1234ze(E) refrigerant and the CF3I, adding one or more compounds includes:
adding an amount of the R134a refrigerant to address capacity, the amount of the R134a being selected so that a GWP of the retrofitted refrigerant composition is less than 600, and
wherein the retrofitted refrigerant composition is non-flammable and has a capacity that is equal to or greater than 90% of a capacity of R134a refrigerant alone.

### Claim 9 (depends on 8)

The method of claim 8, wherein
the retrofitted refrigerant composition is the first retrofitted refrigerant composition, and
the retrofitted refrigerant composition has a temperature glide that is equal to or less than 1.0°.

### Claim 10 (depends on 8)

The method of claim 8, wherein the retrofitted refrigerant composition is the second retrofitted refrigerant composition, and the capacity of the retrofitted refrigerant composition being equal to or greater than the capacity of R134a refrigerant alone.

### Claim 11 (depends on 8)

The method of claim 8, wherein a temperature glide of the retrofitted refrigerant composition is equal to or less than 1° C.

### Claim 12 (depends on 8)

The method of claim 8, wherein the GWP of the retrofitted refrigerant composition is less than 150.

### Claim 13 (depends on 8)

The method of claim 8, wherein the retrofitted refrigerant composition is the third retrofitted refrigerant composition.

### Claim 14 (depends on 6)

The method of claim 6, wherein the first refrigerant is the R1234yf refrigerant, and the refrigerant composition includes: from about 2 wt % to about 68 wt % of the R1234yf refrigerant about 63.7 wt %, or greater than 0 wt % and less than 63.7 wt % of the CF3I; and from about 9.8 wt % to about 46 wt % of the R134a refrigerant, and
the capacity of the refrigerant composition is equal to or greater than the capacity of R134 refrigerant alone.

### Claim 15 (depends on 6)

The method of claim 6, wherein the first refrigerant is the R1234ze(E) refrigerant, and the refrigerant composition includes: about 54.8 wt %, or greater than 0 wt % and less than 54.8 wt % of the R1234ze(E) refrigerant from about 4.5 wt % to about 91 wt % of CF3I; and from about 1.9 wt % to about 46 wt % of the R134a refrigerant.

### Claim 16 (depends on 6)

The method of claim 6, wherein
the first refrigerant is the R152a refrigerant, and the refrigerant composition includes: from about 1 wt % to about 30 wt % of the R152a refrigerant from about 33.9 wt % to about 78.6 wt % of the CF3I; and about 46 wt %, or less than 46 wt % and greater than 0 wt % of the R134a refrigerant, and
the refrigerant composition has a temperature glide that is equal to or less than 1.0° C.

### Claim 17 (depends on 4)

The non-flammable refrigerant composition of claim 4, wherein
the non-flammable refrigerant composition comprises:
about 52.6 wt %, or greater than 0 wt % and less than 52.6 wt % of the R1234ze(E) refrigerant;
from about 25.2 wt % to about 76.2 wt % of the CF3I; and
from about 1.9 wt % to about 46 wt % of the R134a refrigerant, and
the refrigerant composition has a temperature glide that is equal to or less than 1.0° C.