Composition for heat cycle system, and heat cycle system

Patent metadata

Field	Value
Publication number	US-2016347980-A1
Application number	US-201615232989-A
Country	US
Kind code	A1
Filing date	Aug 10, 2016
Priority date	Feb 24, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

To provide a composition for a heat cycle system comprising trifluoroethylene (HFO-1123), which has a low global warming potential and excellent cycle performance of HFO-1123 and which has high durability, and a heat cycle system employing the composition, which has less influence over global warming and has both high cycle performance and durability.
A composition for a heat cycle system, which comprises a working fluid for heat cycle containing trifluoroethylene, and a radical scavenger, and a heat cycle system employing the composition for a heat cycle system.

First claim

What is claimed is:

1 . A composition for a heat cycle system, which comprises a working fluid for heat cycle containing trifluoroethylene, and a radical scavenger.

2 . The composition for a heat cycle system according to claim 1 , wherein the radical scavenger is at least one member selected from a thioether compound, an aromatic amine compound having active hydrogen, a nitroso compound, a hydroxy aromatic compound, a quinone compound, a transition metal salt, an agent for generating a halogen atom other than fluorine, and a perfluoroalkyl radical generator.

3 . The composition for a heat cycle system according to claim 2 , wherein the radical scavenger is at least one member selected from phenothiazine, distearyl thiodipropionate, p-phenylenediamine, 4-aminodiphenylamine, N,N′-diphenyl-p-phenylenediamine, N-isopropyl-N′-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine, N,N′-di-2-naphthyl-p-phenylenediamine, diphenylamine, N-phenyl-β-naphthylamine, 4,4′-dicumyl-diphenylamine, 4,4′-dioctyl-diphenylamine, N-nitrosodiphenylamine, N-nitrosophenylnaphthylamine, N-nitrosodinaphthylamine, p nitrosophenol, nitrosobenzene, p-nitrosodiphenylamine, α-nitroso-β-naphthol, hydroquinone, allylphenol, 4,6-dimethyl-2-allylphenol, p-methoxyphenol, cresol, t-butylcatechol, 3,5-di-t-butyl-4-hydroxytoluene, 2,2′-methylenebis(4-methyl-6-t-butylphenol), 2,2′-methylenebis(4-ethyl-6-butylphenol), 4,4′-thiobis(3-methyl-6-t-butylphenol), copper dialkyldithiocarbamate (wherein each of the alkyl groups which may be the same or different from each other, is a methyl group, an ethyl group, a propyl group or a butyl group (provided that the propyl group or the butyl group may be branched)), copper acetate, copper salicylate, copper thiocyanate, copper nitrate, copper chloride, copper carbonate, copper hydroxide, copper acrylate, manganese dialkyldithiocarbamate (wherein each of the alkyl groups which may be the same or different from each other, is a methyl group, an ethyl group, a propyl group or a butyl group (provided that the propyl group or the butyl group may be branched)), manganese diphenyldithiocarbamate, manganese formate, manganese acetate, manganese octanoate, manganese naphthenate, manganese permanganate, manganese salt of ethylenediaminetetraacetic acid, a compound having a C—X (wherein X is Cl, Br or I) bond and having the C—X bond energy being at most the other bond energies in its molecule, CX 4 (wherein X is Cl, Br or I, and four Xs are the same) and Rf—X (wherein Rf is a C 1-6 perfluoroalkyl group, and X is Cl, Br or I).

4 . The composition for a heat cycle system according to claim 3 , wherein the radical scavenger is at least one member selected from a compound having a C—X (wherein X is Cl, Br or I) bond and having the C—X bond energy being at most the other bond energies in its molecule, CX 4 (wherein X is Cl, Br or I, and four Xs are the same) and Rf—X (wherein Rf is a C 1-6 perfluoroalkyl group, and X is Cl, Br or I).

5 . The composition for a heat cycle system according to claim 1 , wherein the radical scavenger is α-pinene.

6 . The composition for a heat cycle system according to claim 1 , wherein the radical scavenger is CH 3 F.

7 . The composition for a heat cycle system according to claim 1 , wherein the content of the radical scavenger is from 1 to 10 parts by mass per 100 parts by mass of HFO-1123 in the composition.

8 . The composition for a heat cycle system according to claim 1 , wherein the working fluid for heat cycle further contains at least one member selected from a saturated hydrofluorocarbon.

9 . The composition for a heat cycle system according to claim 8 , wherein the saturated hydrofluorocarbon is at least one member selected from difluoromethane, 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane and pentafluoroethane.

10 . The composition for a heat cycle system according to claim 1 , wherein the working fluid for heat cycle further contains at least one member selected from a hydrofluorocarbon having a carbon-carbon double bond other than trifluoroethylene.

11 . The composition for a heat cycle system according to claim 10 , wherein the hydrofluorocarbon having a carbon-carbon double bond is at least one member selected from 1,3,3,3-tetrafluoropropene and 2,3,3,3-tetrafluoropropene.

12 . The composition for a heat cycle system according to claim 1 , wherein the proportion of trifluoroethylene is at least 20 mass % based on the working fluid for heat cycle.

13 . The composition for a heat cycle system according to claim 1 , wherein the proportion of trifluoroethylene is from 20 to 80 mass % based on the working fluid for heat cycle.

14 . A heat cycle system, which employs the composition for a heat cycle system as defined in claim 1 .

15 . The heat cycle system according to claim 14 , which is a refrigerating apparatus, an air-conditioning apparatus, a power generation system, a heat transport apparatus or a secondary cooling machine.

Assignees

• Asahi Glass Co Ltd

Inventors

• Okamoto Hidekazu

Classifications

• F25B25/005

  using primary and secondary systems · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• F25B2339/047

  Water-cooled condensers · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title