COMPOSITIONS OF HFO-1234YF, HFO-1132E, AND HFC-152A AND SYSTEMS FOR USING THE COMPOSITIONS
Environmentally friendly refrigerant blends utilizing refrigerants including 2,3,3,3-tetrafluoropropene (HFO-1234yf), E-1,2-difluoroethylene (HFO-1132E), and 1,1-difluoroethane (HFC-152a). The blends have low GWP, low toxicity, and low flammability with low temperature glide for use in a hybrid, mild hybrid, plug-in hybrid, or full electric vehicles for thermal management (transferring heat from one part of the vehicle to the other) of the passenger compartment providing air conditioning (A/C) or heating to the passenger cabin.
1 .- 52 . (canceled)
53 . A composition comprising a refrigerant blend comprising HFO-1234yf, HFO-1132E, and HFC-152a.
54 . The composition of claim 53 , wherein:
said refrigerant blend consists essentially of from about 62 to 90 weight percent HFO-1234yf, from about 8 to 18 weight percent HFO-1132E, and from about 1 to 20 weight percent HFC-152a; or
said refrigerant blend consists essentially of from about 62 to 86 weight percent HFO-1234yf, from about 12 to 18 weight percent HFO-1132E, and from about 1 to 20 weight percent HFC-152a; or
said refrigerant blend consists essentially of from about 62 to 79 weight percent HFO-1234yf, from about 15 to 18 weight percent HFO-1132E, and from about 6 to 20 weight percent HFC-152a; or
said refrigerant blend consists essentially of from about 70 to 89 weight percent HFO-1234yf, from about 9 to 17 weight percent HFO-1132E, and from about 1 to 13 weight percent HFC-152a; or
said refrigerant blend consists essentially of from about 79 to 89 weight percent HFO-1234yf, from about 10 to 15 weight percent HFO-1132E, and from about 1 to 6 weight percent HFC-152a.
55 . The composition of claim 53 , wherein said refrigerant provides average temperature glide of about 0.1 K to less than about 4 K.
56 . The composition of claim 53 , wherein said refrigerant has a GWP of equal to or less than about 35.
57 . The composition of claim 53 , further comprising at least one additional compound:
a) comprising at least one compound selected from the group consisting of HCFC-244bb, HFC-245cb, HFC-254eb, CFC-12, HCFC-124, 3,3,3-trifluoropropyne, HCC-1140, HFC-1225ye, HFO-1225zc, HFC-134a, HFO-1243zf, and HCFO-1131; or
b) comprising at least one compound selected from the group consisting of: HFC-23, HCFC-31, HFC-41, HFC-143a, HCFC-22, HCC-40, HFC-161, HFO-1141, HCO-1140, HCFC-151a, HCC-150a, HCC-160, HCFO-1130a, HCFC-141b, HFO-1132a, HFC-143a, HCFO-1122, and HCFC-142b; or
c) HFO-1132Z, HFO-1132a, HCFO-1131a, HCFC-142a, CFO-1122a, HFO-1123, HCFC-132, and CFO-1113; or
d) combinations of a) and b), a) and c), b) and c), or a), b) and c);
wherein the total amount of additional compound comprises greater than 0 and less than 1 weight percent.
58 . The composition of claim 57 , wherein the additional compound includes at least one of HFC-161, HFO-1141, HCO-1140, HCFC-151a, HCC-150a, or HCC-160 or combinations thereof.
59 . The composition of claim 57 ,
wherein the additional compounds comprise HFC-143a, HFO-1132Z, HFC-161 and HCFC-151a, or
wherein the additional compounds comprise HFO-1243zf, HFC-143a, HCC-40, HFC-161, and HCFC-151a, or
wherein the additional compounds comprise HFO-1243zf, HCC-40, and HFC-161.
60 . The composition of claim 53 , wherein the refrigerant has a burning velocity of 10 cm/s or less, when measured in accordance with ISO 817 vertical tube method.
61 . The composition of claim 53 , wherein the refrigerant is classified as 2L for flammability as defined in ANSI/ASHRAE Standard 34.
62 . The composition of claim 53 , further comprising a lubricant.
63 . The composition of claim 62 , wherein said lubricant is at least one selected from the group consisting of polyalkylene glycol, polyol ester, poly-α-olefin, and polyvinyl ether.
64 . The composition of claim 53 , further comprising a stabilizer.
65 . The composition of claim 64 , wherein the stabilizer is selected from the group consisting of nitromethane, ascorbic acid, terephthalic acid, azoles, phenolic compounds, cyclic monoterpenes, terpenes, phosphites, phosphates, phosphonates, thiols, and lactones.
66 . The composition of claim 53 , further comprising at least one tracer.
67 . The composition of claim 66 , wherein said at least one tracer is selected from the group consisting of hydrofluorocarbons, hydrofluoroolefins, hydrochlorocarbons, hydrochloroolefins, hydrochlorofluorocarbons, hydrochlorofluoroolefins, hydrochlorocarbons, hydrochloroolefins, chlorofluorocarbons, chlorofluoroolefins, hydrocarbons, perfluorocarbons, perfluoroolefins, and combinations thereof.
68 . A system for heating and cooling the passenger compartment of an electric vehicle, comprising an evaporator, compressor, condenser and expansion device, each operably connected to perform a vapor compression cycle, wherein the system contains the composition of claim 53 .
69 . The system of claim 68 , wherein the average temperature glide is less than 4.0 K, preferably less than 3.0 K.
70 . The system of claim 68 , wherein the system does not include a PTC heater.
71 . The system of claim 68 , wherein the system further comprises a reheater operably connected between the compressor and the condenser.
72 . A method for replacing HFO-1234yf in a heating and cooling system contained within an electric vehicle, comprising providing the composition of claim 53 as a heat transfer fluid.
73 . The method of claim 72 , wherein the refrigerant produces volumetric heating capacity at least 20% higher than HFO-1234yf alone when operating under the same conditions.
74 . The method of claim 72 , wherein the refrigerant produces COP equal to or greater than the COP of HFO-1234yf alone when operating under the same conditions.
75 . A method of servicing the heating and cooling system of an electric vehicle comprising removing all of a used refrigerant from the system and charging the system with the composition of claim 53 .