Lower GWP refrigerant compositions

Patent metadata

Field	Value
Publication number	US-11078392-B2
Application number	US-201715858896-A
Country	US
Kind code	B2
Filing date	Dec 29, 2017
Priority date	Dec 29, 2017
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

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 CF 3 I. 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 CF 3 I, 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 CF 3 I, or R134a refrigerant, a hydrofluoroolefin refrigerant, and CF 3 I.

First claim

What is claimed is:

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 CF 3 I; 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.

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

3. 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.

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 CF 3 I; 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.

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;
CF 3 I 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.

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 CF 3 I, 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 CF 3 I; 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 CF 3 I; 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 CF 3 I; 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.

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

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 CF 3 I; 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 CF 3 I; 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 CF 3 I; 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 CF 3 I 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 CF 3 I, 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 CF 3 I 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 CF 3 I and the R1234yf refrigerant or the R1234ze(E) refrigerant and the CF 3 I, 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.

9. 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°.

10. 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.

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

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

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

14. 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 CF 3 I; 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.

15. The meth

Assignees

• Trane Int Inc

Inventors

• Schultz Kenneth J
• Kujak Stephen A

Classifications

• C09K2205/40

  Replacement mixtures · CPC title

• C09K2205/122

  Halogenated hydrocarbons · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K5/045

  containing only fluorine as halogen · CPC title