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

• US 10,144,856 B2
• Filed: 08/31/2016
• Issued: 12/04/2018
• Est. Priority Date: 03/17/2014
• Status: Active Grant

• Current Assignee: AGC, Inc.
• Original Assignee: AGC, Inc.
• Inventors: Fukushima, Masato, Kawaguchi, Satoshi, Ueno, Katsuya, Tanaka, Toshiyuki, Okamoto, Hidekazu, Otsuka, Tetsuo, Kadowaki, Yoshinobu, Nogami, Tatsuhiro
• Primary Examiner(s): Hardee, John R
• Application Number:
  US15/252,996
• Publication Number:
  US 20160369145A1
• Time in Patent Office: 825 Days
• 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 5/045 containing only fluorine as halogen
• CPC Class Codes: C10M 171/008 Lubricant compositions compatible with refrigerants
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2207/2835 used as base material
• CPC Class Codes: C10M 2209/043 used as base material
• CPC Class Codes: C10M 2209/1033 used as base material
• CPC Class Codes: C10N 2030/70 Soluble oils
• CPC Class Codes: C10N 2040/30 Refrigerators lubricants or compressors lubricants
• CPC Class Codes: F25B 1/00 Compression machines, plants or systems with non-reversible cycle F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence
• CPC Class Codes: F25B 2400/121 using R1234
• CPC Class Codes: F25B 2500/14 the presence of moisture in a refrigeration component or cycle
• CPC Class Codes: F25B 2500/222 Detecting refrigerant leaks
• CPC Class Codes: F25B 31/002 Lubrication
• CPC Class Codes: F25B 43/00 Arrangements for separating or purifying gases or liquids in analysers or rectifiers F25B33/00; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat F25B40/00 takes precedence
• CPC Class Codes: F25B 43/02 for separating lubricants from the refrigerant

Abstract

A working fluid for heat cycle contains trifluoroethylene and 2,3,3,3-tetrafluoropropene. The proportion of the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene based on the entire amount of the working fluid is higher than 90 mass % and at most 100 mass %. The proportion of trifluoroethylene based on the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene is at least 21 mass % and at most 39 mass %. The working fluid has a low global warming potential and suppressed self-decomposition property. A composition for a heat cycle system contains the working fluid and a heat cycle system employs the composition.

Claims

1. A working fluid for heat cycle, comprising:

trifluoroethylene and 2,3,3,3-tetrafluoropropene,

wherein

a proportion of a total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene based on an entire amount of the working fluid is higher than 90 mass % and at most 100 mass %, and

a proportion of trifluoroethylene based on the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene is at least 29.7 mass % and at most 38.0 mass %.

2. The working fluid according to claim 1, wherein the proportion of trifluoroethylene based on the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene is at least 31.5 mass % and at most 38.0 mass %.

3. The working fluid according to claim 2, wherein the proportion of trifluoroethylene based on the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene is at least 31.5 mass % and less than 35 mass %.

4. The working fluid according to claim 1, wherein the proportion of the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene based on the entire amount of the working fluid is higher than 97 mass % and at most 100 mass %.

5. A composition for a heat cycle system, comprising:

the working fluid according to claim 1, and

a refrigerant oil.

6. A heat cycle system, which employs the composition according to claim 5.

7. The heat cycle system according to claim 6, which is a refrigerating apparatus, an air-conditioning apparatus, a power generation system, a heat transport apparatus or a secondary cooling machine.

8. The heat cycle system according to claim 7, which is a room air-conditioner, a store package air-conditioner, a building package air-conditioner, a plant package air-conditioner, a gas engine heat pump, a train air-conditioning system, an automobile air-conditioning system, a built-in showcase, a separate showcase, an industrial fridge freezer, an ice making machine or a vending machine.