Coolant-containing composition, use for same, refrigerator having same, and method for operating refrigerator

Abstract

An object is to provide a mixed refrigerant having three types of performance, i.e., a refrigerating capacity and a coefficient of performance that are equivalent to those of R410A, and a sufficiently low GWP. Provided as a means for achieving the object is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf).

1 . A composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf). 
     
     
         2 . A composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)) and 2,3,3,3-tetrafluoro-1-propene (R1234yf), and optionally further comprising trifluoroethylene (HFO-1123),
 wherein
 when the mass % of HFO-1132(E), HFO-1123, and R1234yf based on their sum in the refrigerant is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), HFO-1123, and R1234yf is 100 mass % are within the range of a figure surrounded by line segments OD, DG, GH, and HO that connect the following 4 points: 
   point D (87.6, 0.0, 12.4),   point G (18.2, 55.1, 26.7),   point H (56.7, 43.3, 0.0), and   point O (100.0, 0.0, 0.0),   or on the line segments OD, DG, and GH (excluding the points O and H);
 the line segment DG is represented by coordinates (0.0047y 2 −1.5177y+87.598, y, −0.0047y 2 +0.5177y+12.402), 
 the line segment GH is represented by coordinates (−0.0134z 2 −1.0825z+56.692, 0.0134z 2 +0.0825z+43.308, z), and 
 the line segments HO and OD are straight lines. 
   
     
     
         3 . The composition according to  claim 1 ,
 wherein
 when the mass % of HFO-1132(E), HFO-1123, and R1234yf based on their sum in the refrigerant is respectively represented by x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), HFO-1123, and R1234yf is 100 mass % are within the range of a figure surrounded by line segments LG, GH, HI, and IL that connect the following 4 points: 
   point L (72.5, 10.2, 17.3),   point G (18.2, 55.1, 26.7),   point H (56.7, 43.3, 0.0), and   point I (72.5, 27.5, 0.0),   or on the line segments LG, GH, and IL (excluding the points H and I);
 the line segment LG is represented by coordinates (0.0047y 2 −1.5177y+87.598, y, −0.0047y 2 +0.5177y+12.402), 
 the line segment GH is represented by coordinates (−0.0134z 2 −1.0825z+56.692, 0.0134z 2 +0.0825z+43.308, z), and 
 the line segments HI and IL are straight lines. 
   
     
     
         4 . The composition according to  claim 1 , further comprising R32. 
     
     
         5 . The composition according to  claim 4 ,
 wherein
 when the mass % of HFO-1132(E), HFO-1123, R1234yf, and R32 based on their sum in the refrigerant is respectively represented by x, y, z, and a, 
 if 0<a≤10.0, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), HFO-1123, and R1234yf is (100-a) mass % are within the range of a figure surrounded by straight lines that connect the following 4 points: 
   point A (0.02a 2 −2.46a+93.4, 0, −0.02a 2 +1.46a+6.6),   point B′(−0.008a 2 −1.38a+56, 0.018a 2 −0.53a+26.3, −0.01a 2 +0.91a+17.7),   point C (−0.016a 2 +0.02a+77.6, 0.016a 2 −1.02a+22.4, 0), and   point O (100.0-a, 0.0, 0.0),   or on the straight lines OA, AB′, and B′C (excluding the points O and C);
 if 10.0<a≤16.5, coordinates (x,y,z) in the ternary composition diagram are within the range of a figure surrounded by straight lines that connect the following 4 points: 
   point A (0.0244a 2 −2.5695a+94.056, 0, −0.0244a 2 +1.5695a+5.944), point B′(0.0161a 2 -1.9959a+59.749, 0.014a 2 −0.3399a+24.8, −0.0301a 2 +1.3358a+15.451),   point C (−0.0161a 2 −0.0041a+77.851, 0.0161a 2 −0.9959a+22.149, 0), and   point O (100.0-a, 0.0, 0.0),   or on the straight lines OA, AB′, and B′C (excluding the points O and C); or
 if 16.5<a≤21.8, coordinates (x,y,z) in the ternary composition diagram are within the range of a figure surrounded by straight lines that connect the following 4 points: 
   point A (0.0161a 2 −2.3535a+92.742, 0, −0.0161a 2 +1.3535a+7.258),   point B′(−0.0435a 2 −0.4456a+50.406, −0.0304a 2 +1.8991a−0.0661, 0.0739a 2 −2.4535a+49.6601),   point C (−0.0263a 2 +0.3107a+75.444, 0.0263a 2 −1.3107a+24.556, 0), and   point O (100.0-a, 0.0, 0.0),   or on the straight lines OA, AB′, and B′C (excluding the points O and C).   
     
     
         6 . The composition according to  claim 1 , for use as a working fluid for a refrigerating machine, wherein the composition further comprises a refrigeration oil. 
     
     
         7 . The composition according to  claim 1 , for use as an alternative refrigerant for R410A. 
     
     
         8 . Use of the composition according to  claim 1  as an alternative refrigerant for R410A. 
     
     
         9 . A refrigerating machine comprising the composition according to  claim 1  as a working fluid. 
     
     
         10 . A method for operating a refrigerating machine, comprising the step of circulating the composition according to  claim 1  as a working fluid in a refrigerating machine. 
     
     
         11 . The composition according to  claim 2 , further comprising R32. 
     
     
         12 . The composition according to  claim 11 ,
 wherein
 when the mass % of HFO-1132(E), HFO-1123, R1234yf, and R32 based on their sum in the refrigerant is respectively represented by x, y, z, and a, 
 if 0<a≤10.0, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), HFO-1123, and R1234yf is (100-a) mass % are within the range of a figure surrounded by straight lines that connect the following 4 points: 
   point A (0.02a 2 −2.46a+93.4, 0, −0.02a 2 +1.46a+6.6),   point B′(−0.008a 2 −1.38a+56, 0.018a 2 −0.53a+26.3, −0.01a 2 +0.91a+17.7),   point C (−0.016a 2 +0.02a+77.6, 0.016a 2 −1.02a+22.4, 0), and   point O (100.0-a, 0.0, 0.0),   or on the straight lines OA, AB′, and B′C (excluding the points O and C);
 if 10.0<a≤16.5, coordinates (x,y,z) in the ternary composition diagram are within the range of a figure surrounded by straight lines that connect the following 4 points: 
   point A (0.0244a 2 −2.5695a+94.056, 0, −0.0244a 2 +1.5695a+5.944), point B′(0.0161a 2 -1.9959a+59.749, 0.014a 2 −0.3399a+24.8, −0.0301a 2 +1.3358a+15.451),   point C (−0.0161a 2 −0.0041a+77.851, 0.0161a 2 −0.9959a+22.149, 0), and   point O (100.0-a, 0.0, 0.0),   or on the straight lines OA, AB′, and B′C (excluding the points O and C); or
 if 16.5<a≤21.8, coordinates (x,y,z) in the ternary composition diagram are within the range of a figure surrounded by straight lines that connect the following 4 points: 
   point A (0.0161a 2 −2.3535a+92.742, 0, −0.0161a 2 +1.3535a+7.258),   point B′(−0.0435a 2 −0.4456a+50.406, −0.0304a 2 +1.8991a−0.0661, 0.0739a 2 −2.4535a+49.6601),   point C (−0.0263a 2 +0.3107a+75.444, 0.0263a 2 −1.3107a+24.556, 0), and   point O (100.0-a, 0.0, 0.0),   or on the straight lines OA, AB′, and B′C (excluding the points O and C).   
     
     
         13 . The composition according to  claim 2 , for use as a working fluid for a refrigerating machine, wherein the composition further comprises a refrigeration oil. 
     
     
         14 . The composition according to  claim 2 , for use as an alternative refrigerant for R410A. 
     
     
         15 . Use of the composition according to  claim 2  as an alternative refrigerant for R410A. 
     
     
         16 . A refrigerating machine comprising the composition according to  claim 2  as a working fluid. 
     
     
         17 . A method for operating a refrigerating machine, comprising the step of circulating the composition according to  claim 2  as a working fluid in a refrigerating machine.