Heat transfer compositions as replacement for R-134A
AssigneeArkema France
InventorWissam Rached
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Abstract
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.
Claims22
A process of heat transfer by means of a heat transfer installation containing a heat transfer composition, the heat transfer composition comprising:
- a refrigerant fluid which comprises 2,3,3,3-tetrafluoropropene, and
- a lubricant;
- in which the lubricant comprises a polyol ester, the solubility of the 2,3,3,3-tetrafluoropropene in the lubricant at 0° C. and at an absolute pressure of 2.2 bar being 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;
- the process comprising the successive steps:
- of evaporating a refrigerant fluid;
- of superheating the refrigerant fluid;
- of compressing the refrigerant fluid.
- in which the superheating of the refererant fluid is from 2 to 10° C.
A process of heat transfer by means of a heat transfer installation containing a heat transfer composition, the heat transfer composition comprising:
- a refrigerant fluid which comprises 2,3,3,3-tetrafluoropropene, and
- a lubricant;
- in which the lubricant comprises a polyol ester, the solubility of the 2,3,3,3-tetrafluoropropene in the lubricant at 0° C. and at an absolute pressure of 2.2 bar being 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;
- the process comprising the successive steps:
- of evaporating a refrigerant fluid;
- of superheating the refrigerant fluid;
- of compressing the refrigerant fluid,
- in which the heat transfer composition is a replacement heat transfer composition, which is used as replacement for an initial heat transfer composition comprising:
- an initial refrigerant fluid, and
- an initial lubricant,
- in which the superheating with the replacement heat transfer composition is less than the superheating when the same process is implemented with the initial heat transfer composition.
Dependencies are inferred from the claim text.