Working fluid for heat cycle, composition for heat cycle system, and heat cycle system

• US 10,131,827 B2
• Filed: 07/27/2016
• Issued: 11/20/2018
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: AGC, Inc.
• Original Assignee: AGC, Inc.
• Inventors: Fukushima, Masato, Mitsuoka, Hiroaki, Tasaka, Mai, Kawaguchi, Satoshi, Ueno, Katsuya, Tanaka, Toshiyuki, Okamoto, Hidekazu, Otsuka, Tetsuo, Kadowaki, Yoshinobu, Nogami, Tatsuhiro, Shirakawa, Daisuke, Takagi, Hirokazu, Arai, Takeaki
• Primary Examiner(s): McGinty, Douglas J
• Application Number:
  US15/220,549
• Publication Number:
  US 20160333243A1
• Time in Patent Office: 846 Days
• Field of Search: 252 67, 252 68, 252 69, 62467, 62468
• CPC Class Codes: C09K 2205/122 Halogenated hydrocarbons
• CPC Class Codes: C09K 2205/126 Unsaturated fluorinated hydrocarbons
• CPC Class Codes: C09K 2205/22 All components of a mixture being fluoro compounds
• CPC Class Codes: C09K 2205/40 Replacement mixtures
• CPC Class Codes: C09K 5/044 comprising halogenated compounds
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen

Abstract

To provide a working fluid which has cycle performance sufficient as an alternative to R410A while the influence over global warming is sufficiently suppressed, which does not significantly increase the load to an apparatus as compared with a case where R410A is used, and which can be stably used continuously without any special measures, a composition for a heat cycle system contains the working fluid, and a heat cycle system employs the composition. A working fluid for heat cycle, wherein the global warming potential is less than 300; the product of the relative coefficient of performance and the relative refrigerating capacity is at least 0.820 relative to R410A in a standard refrigerating cycle under conditions of an evaporation temperature of 0° C., a condensing temperature of 40° C., a supercoiling degree of 5° C. and a degree of superheat of 5° C.; the relative compressor discharge gas pressure is at most 1.100; the lower limit of the combustion range by method A in High Pressure Gas Safety Act is at least 5 vol %; and the pressure will not exceed 2.00 MPaG in a combustion test by method A in High Pressure Gas Safety act under 0.98 MPaG at 250° C.

Claims

1. A working fluid for heat cycle, the working fluid comprising:

1,1,2-trifluoroethylene (HFO-1123); and

at least one selected from the group consisting of trans-1,3,3,3,-tetrafluoropropene (HFO-1234ze(E)), cis-1,3,3,3,-tetrafluoropropene (HFO-1234ze(Z)), 2,3,3,3-tetrafluoropropene (HFO-1234yf), and difluoromethane (HFC-32),

wherein the working fluid satisfies the following properties (A-1) to (E-1);

(A-1);

the global warming potential (100 years) in Intergovernmental Panel on Climate Change (IPCC), Fourth assessment report, is at most 200;

(B-1);

the product of the relative refrigerating capacity (RQ_R410A) calculated in accordance with the following formula (X) and the relative coefficient of performance (RCOP_R410A) calculated in accordance with the following formula (Y) is at least 0.820;

2. The working fluid according to claim 1, wherein the product of the relative coefficient of performance (RCOP_R410A) and the relative refrigerating capacity (RQ_R410A) is at least 0.900.

3. The working fluid according to claim 2, wherein the product of the relative coefficient of performance (RCOP_R410A) and the relative refrigerating capacity (RQ_R410A) is at least 0.950.

4. The working fluid according to claim 1, wherein the relative pressure (RDP_R410A) is at most 1.000.

5. The working fluid according to claim 1, wherein the working fluid has no combustion range.

6. A composition for a heat cycle system, the composition comprising the working fluid for heat cycle as defined in claim 1 and a refrigerant oil.

7. A heat cycle system, comprising the composition of claim 6.

8. The heat cycle system according to claim 7, wherein the heat cycle system is a refrigerating apparatus, an air-conditioning apparatus, a power generation system, a heat transport apparatus or a secondary cooling machine.

9. A working fluid for heat cycle, the working fluid being one of mixtures of:

1,1,2-trifluoroethylene (HFO-1123), 2,3,3,3-tetrafluoropropene (HFO-1234yf), and difluoromethane (HFC-32);

1,1,2-trifluoroethylene (HFO-1123), trans-1,3,3,3,-tetrafluoropropene (HFO-1234ze(E)), and difluoromethane (HFC-32);

cis-1,2-difluoroethylene (HFO-1132(Z)) and difluoromethane (HFC-32);

trans-1,2-difluoroethylene (HFO-1132(E)), 2,3,3,3-tetrafluoropropene (HFO-1234yf), and difluoromethane (HFC-32);

or

1,1,2-trifluoroethylene (HFO-1123) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),

wherein the working fluid satisfies the following properties (A-1) to (E-1);

(A-1);

the global warming potential (100 years) in Intergovernmental Panel on Climate Change (IPCC), Fourth assessment report, is at most 200;

(B-1);

the product of the relative refrigerating capacity (RQ_R410A) calculated in accordance with the following formula (X) and the relative coefficient of performance (RCOP_R410A) calculated in accordance with the following formula (Y) is at least 0.820;

10. The working fluid according to claim 9, wherein the working fluid is one of mixtures of:

1,1,2-trifluoroethylene (HFO-1123), 2,3,3,3-tetrafluoropropene (HFO-1234yf), and difluoromethane (HFC-32);

1,1,2-trifluoroethylene (HFO-1123), trans-1,3,3,3,-tetrafluoropropene (HFO-1234ze(E)), and difluoromethane (HFC-32);

or

1,1,2-trifluoroethylene (HFO-1123) and 2,3,3,3-tetrafluoropropene (HFO-1234yf).