WORKING FLUID FOR HEAT CYCLE, COMPOSITION FOR HEAT CYCLE SYSTEM, AND HEAT CYCLE SYSTEM
To provide a working fluid for heat cycle, which has less influence over global warming, which has a small temperature glide, which has a sufficiently low discharge temperature and which is excellent in the cycle performance (refrigerating capacity and coefficient of performance), a composition for a heat cycle system, and a heat cycle system. A working fluid for heat cycle, which contains trifluoroethylene and 1,2-difluoroethylene, a composition for a heat cycle system, and a heat cycle system employing the composition. In the working fluid for heat cycle, the proportion of the total amount of trifluoroethylene and 1,2-difluoroethylene is preferably at least 20 mass % and at most 100 mass %.
1 . A working fluid for heat cycle, which contains trifluoroethylene and 1,2-difluoroethylene.
2 . The working fluid for heat cycle according to claim 1 , wherein the proportion of the total amount of trifluoroethylene and 1,2-difluoroethylene based on the entire amount of the working fluid for heat cycle is at least 20 mass % and at most 100 mass %.
3 . The working fluid for heat cycle according to claim 1 , wherein the proportion of trifluoroethylene based on the entire amount of the working fluid for heat cycle is at least 57 mass % and at most 90 mass %.
4 . The working fluid for heat cycle according to claim 1 , wherein the proportion of 1,2-difluoroethylene based on the entire amount of the working fluid for heat cycle is at most 43 mass %.
5 . The working fluid for heat cycle according to claim 1 , wherein the proportion of 1,2-difluoroethylene based on the entire amount of the working fluid for heat cycle is at least 10 mass %.
6 . The working fluid for heat cycle according to claim 1 , which further contains difluoromethane.
7 . The working fluid for heat cycle according to claim 6 , wherein the proportion of difluoromethane based on the entire amount of the working fluid for heat cycle is at least 10 mass % and at most 60 mass %.
8 . The working fluid for heat cycle according to claim 1 , which further contains pentafluoroethane.
9 . The working fluid for heat cycle according to claim 8 , wherein the proportion of pentafluoroethane based on the entire amount of the working fluid for heat cycle is at least 15 mass % and at most 60 mass %.
10 . The working fluid for heat cycle according to claim 1 , which further contains difluoromethane and pentafluoroethane.
11 . The working fluid for heat cycle according to claim 10 , wherein the proportion of the total amount of difluoromethane and pentafluoroethane based on the entire amount of the working fluid for heat cycle is at least 35 mass % and at most 60 mass %.
12 . A composition for a heat cycle system, which comprises the working fluid for heat cycle as defined in claim 1 , and a refrigerant oil.
13 . A heat cycle system, which employs the composition for a heat cycle system as defined in claim 12 .
14 . The heat cycle system according to claim 13 , which is a refrigerating apparatus, an air-conditioning apparatus, a power generation system, a heat transport apparatus or a secondary cooling machine.
15 . The heat cycle system according to claim 14 , 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.