Working fluid for heat cycle, rankine cycle system, heat pump cycle system and refrigeration cycle system
View Patent ↗A working fluid for a heat cycle containing at least 90 mass % of 1,1,2,2- tetrafluoroethyl-2,2,2-trifluoroethyl ether (HFE-347) and a C 1-4 alcohol is provided. A Rankine cycle system, a heat pump cycle system and a refrigeration cycle system using the working fluid for a heat cycle of the present invention is also provided.
1. A working fluid for a heat cycle, comprising:
1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (HFE-347); and
at least one C 1-4 alcohol;
wherein
the mass % of the 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether is at least 90%, and
the mass % of the C 1-4 alcohol is in the range of from greater than 0 to 10%.
2. The working fluid for a heat cycle according to claim 1 , wherein the at least one C 1-4 alcohol is selected from the group consisting of methanol, ethanol and isopropanol.
3. The working fluid for a heat cycle according to claim 1 , which further comprises a stabilizer and the concentration of the stabilizer is from greater than 0 to at most 5 mass %.
4. The working fluid for a heat cycle according to claim 3 , wherein the stabilizer is at least one member selected from the group consisting of an oxidation resistance improving agent, a heat resistance improving agent and a metal deactivator.
5. A Rankine cycle system comprising the working fluid for a heat cycle as defined in claim 1 .
6. A heat pump cycle system comprising the working fluid for a heat cycle as defined in claim 1 .
7. A refrigeration cycle system comprising the working fluid for a heat cycle as defined in claim 1 .
8. A working fluid for a heat cycle, consisting of:
at least 90 mass % 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (HFE-347); and
from greater than 0 to 10 mass % of at least one C 1-4 alcohol.
9. The working fluid according to claim 8 , wherein the C 1-4 alcohol is at least one selected from the group consisting of methanol, ethanol and isopropanol.
10. A working fluid for a heat cycle, consisting of:
at least 90 mass % 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (HFE-347);
from greater than 0 to 10 mass % of at least one C 1-4 alcohol; and
at most 5 mass % of at least one stabilizer selected from the group consisting of an oxidation resistance improving agent, a heat resistance improving agent and a metal deactivator.
11. The working fluid according to claim 10 , wherein the C 1-4 alcohol is at least one selected from the group consisting of methanol, ethanol and isopropanol.
12. The working fluid according to claim 10 , wherein the at least one stabilizer is an oxidation resistance-improving agent or heat resistance improving agent selected from the group consisting of N,N′-diphenylphenylenediamine, p-octyldiphenylamine, p,p′-dioctyldiphenylamine, N-phenyl-1-naphthylamine, N-phenyl-2-naphtylamine, N-(p-dodecyl)phenyl-2-naphthylamine, di-1-naphthylamine, di-2-naphthylamine, N-alkylphenothiazine, 6-(t-butyl)phenol, 2,6-di-(t-butyl)phenol, 4-methyl-2,6-di-(t-butyl)phenol and 4,4′-methylenebis(2,6-di-t-butylphenol).
13. The working fluid according to claim 10 , wherein the at least one stabilizer is a metal deactivator selected from the group consisting of imidazole, benzimidazole, 2-mercaptobenzothiazole, 2,5-dimethylcaptothiadiazole, salicylidine-propylenediamine, pyrazole, benzotriazole, tolutriazole, 2-methylbenzamidazole, 3,5-dimethylpyrazole, methylenebis-benzotriazole, an organic acid or an ester thereof, a primary, secondary or tertiary aliphatic amine, an amine salt of an organic or inorganic acid, a heterocyclic nitrogen-containing compound and an amine salt of an alkyl phosphate.