Heat cycle working medium, and heat cycle system composition

Patent metadata

Field	Value
Publication number	US-2025270433-A1
Application number	US-202519186791-A
Country	US
Kind code	A1
Filing date	Apr 23, 2025
Priority date	Oct 27, 2022
Publication date	Aug 28, 2025
Grant date	—

Abstract

Provided is a working medium for a heat cycle, including trifluoroethylene, 1,1-difluoroethane, and (E)-1,3,3,3-tetrafluoropropene.

First claim

1 . A working medium for a heat cycle, comprising trifluoroethylene, 1,1-difluoroethane, and (E)-1,3,3,3-tetrafluoropropene.

2 . The working medium for a heat cycle according to claim 1 , which satisfies the following Formulas (1) and (2) when a content rate of 1,1-difluoroethane with respect to a total content rate of trifluoroethylene, 1,1-difluoroethane, and (E)-1,3,3,3-tetrafluoropropene is Y % by mass, and a content rate of (E)-1,3,3,3-tetrafluoropropene with respect to the same is Z % by mass:

2.
≤
Y
≤
18.34

;
and

Formula
⁢

(
1
)

Z
≤

-
0.01611

×

Y
2

-

0.36606
×
Y

+

17.14
.

Formula
⁢

(
2
)

3 . The working medium for a heat cycle according to claim 2 , wherein the working medium for a heat cycle has a heat of combustion of 12.000 MJ/kg or less.

4 . The working medium for a heat cycle according to claim 2 , wherein the working medium for a heat cycle has a global warming potential of 45 or less.

5 . The working medium for a heat cycle according to claim 1 , which satisfies the following Formulas (3) and (4) when a content rate of 1,1-difluoroethane with respect to a total content rate of trifluoroethylene, 1,1-difluoroethane, and (E)-1,3,3,3-tetrafluoropropene is Y % by mass, and a content rate of (E)-1,3,3,3-tetrafluoropropene with respect to the same is Z % by mass:

2.
≤
Y
≤
76.25

;
and

Formula
⁢

(
3
)

Z
≥

-
0.00279

×

Y
2

-

1.25979
×
Y

+

84.84
.

Formula
⁢

(
4
)

6 . The working medium for a heat cycle according to claim 5 , wherein the working medium for a heat cycle has a heat of combustion of 15.300 MJ/kg or less.

7 . The working medium for a heat cycle according to claim 5 , wherein the working medium for a heat cycle has a global warming potential of 130 or less.

8 . A composition for a heat cycle system, comprising the working medium for a heat cycle according to claim 1 .

Assignees

• Agc Inc

Inventors

• Hayamizu Hiroki
• Fukushima Masato

Classifications

• C09K2205/40

  Replacement mixtures · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title

• C09K2205/122

  Halogenated hydrocarbons · CPC title