The use of a heat-transfer composition including at least one refrigerant chosen from halogenated hydrocarbons, perhalogenated hydrocarbons, fluorinated ketones, fluorinated ethers and also combinations thereof, and at least one dielectric fluid, for cooling a battery of an item of equipment, such as an electric or hybrid vehicle, the heat-transfer composition having a volume resistivity of greater than or equal to 106 Ω.Math.cm at 25° C.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

The present invention relates to a refrigerator oil for a mixed refrigerant containing less than 40% by mass of an unsaturated fluorinated hydrocarbon compound (HFO) on a basis of the whole amount of the mixed refrigerant, the refrigerator oil containing a base oil (P) including at least one selected from the group consisting of a polyvinyl ether (PVE), a polyalkylene glycol (PAG), a copolymer (ECP) of a poly(oxy)alkylene glycol or a monoether thereof and a polyvinyl ether, and a polyol ester (POE), with a hydroxy value of the base oil (P) being 15 mgKOH/g or less; and a refrigerator oil composition containing the foregoing refrigerator oil and a specified refrigerant.

The use of a refrigerant including 2,3,3,3-tetrafluoropropene for the cooling of a battery of an electric vehicle including at least one electrochemical cell including a negative electrode, a positive electrode and an electrolyte, the positive electrode including at least one oxide of formula LiNixMnyCozO2 with x+y+z=1, x>y and x>z, or LiNix′Coy′Alz′ with x′+y′+z′=1, x′>y′ and x′>z′, as electrochemically active material.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

A working fluid composition for a refrigerating machine, containing: a refrigerant containing trifluoroiodomethane; and a refrigerating machine oil containing a complex ester synthesized from a polyhydric alcohol, a polybasic acid, and at least one selected from a monohydric alcohol and a monocarboxylic fatty acid.

A refrigeration cycle device includes: a refrigerant circuit which circulates a mixed refrigerant containing at least CF3I and HFO1123, the RC including a compressor, an expansion valve, an indoor heat exchanger, an outdoor heat exchanger and a refrigerant reservoir; an injection pipe having a first end at a first height within the refrigerant reservoir and a second end connected to the compressor; and an injection valve included in the injection pipe. The CF3I has the greatest fluid density among refrigerants contained in the mixed refrigerant. The first height is higher than a height at which an end of a refrigerant pipe, other than the injection pipe, is located within the refrigerant reservoir.

A method for transferring heat using a heat transfer facility containing a heat transfer composition, said heat transfer composition including a refrigerant, which includes 2,3,3,3-tetrafluoropropene, and a lubricant. The lubricant includes a polyol ester, and the solubility of the 2,3,3,3-tetrafluoropropene in the lubricant at 0° C. and at an absolute pressure of 2.2 bar is less than the solubility of 1,1,1,2-tetrafluoroethane in the lubricant at 0° C. and at an absolute pressure of 2.0 bar. A method including the successive steps of: evaporating a refrigerant; superheating the refrigerant; and compressing the refrigerant.

The present invention relates to heat transfer compositions comprising 1-chloro-1,2 difluoroethylene for use in refrigeration, air conditioning, heat pump systems, chillers, and other heat transfer applications. The inventive heat transfer compositions can possess reduced global warming potential while providing good capacity and performance while providing preferable flammability characteristics

The invention relates to a lubricating oil composition and a refrigerant composition containing a polyalkylene glycol having a terpenoid end group, such as a farnesol end group.