| abstract |
The present invention provides a composition containing a refrigerant that has characteristics of having a sufficiently low GWP and having a refrigeration capacity and a coefficient of performance (COP) equivalent to or better than those of R404A. Specifically, the present invention provides a composition containing a refrigerant that contains trans-1,2-difluoroethylene (HFO-1132(E)), 1,1,2-trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein the total concentration of said three components is 99.5 mass% or more with respect to the total amount of the refrigerant, and, in a triangular compositional figure in which the three components represent respective vertices, the mass ratio of the three components is within the range of an area enclosed by a figure passing through five points, namely, point A (HFO-1132(E)/HFO-1123/HFO-1234yf = 42.5/1.0/56.5 mass%), point B (HFO-1132(E)/HFO-1123/HFO-1234yf = 27.1/1.0/71.9 mass%), point C (HFO-1132(E)/HFO-1123/HFO-1234yf = 1.0/30.4/68.6 mass%), point D (HFO-1132(E)/HFO-1123/HFO-1234yf = 1.0/57.0/42.0 mass%), and point E (HFO-1132(E)/HFO-1123/HFO-1234yf = 42.5/24.1/33.4 mass%). |