Heat-transfer compositions exhibiting improved miscibility with the lubricating oil
AssigneeArkema France
InventorsSophie Guerin, Laurent Abbas, Wissam Rached
Life of this patent
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Abstract
The invention relates to the use of 1,1,1,2-tetrafluoroethane for increasing the miscibility of 2,3,3,3-tetrafluoropropene with a lubricating oil, and in particular with a polyalkylene glycol oil. In this regard, the invention provides heat-transfer compositions and also equipment and processes using these compositions.
Claims17
A composition comprising 2,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoroethane and polyalkylene glycol, wherein the composition comprises from 5% to 50% of polyalkylene glycol.
A method of lubricating a vapor compression circuit, the method comprising lubricating the circuit with a lubricant oil, the lubricant oil comprising polyalkylene glycol in combination with a heat-transfer fluid comprising a mixture of 2,3,3,3-tetrafluoropropene and 1,1,1,2-tetrafluoroethane, wherein the polyalkylene glycol is used in a proportion of from 5% to 50% relative to the sum of the polyalkylene glycol and of the heat-transfer fluid.
A method for increasing the miscibility of 2,3,3,3-tetrafluoropropene with a lubricant oil, the method comprising the addition of 1,1,1,2-tetrafluoroethane to 2,3,3,3-tetrafluoropropene and the lubricant oil, wherein the lubricant oil comprises polyalkylene glycol, and wherein the polyalkylene glycol is used in a proportion of from 5% to 50% relative to the sum of the polyalkylene glycol, 1,1,1,2-tetrafluoroethane, and 2,3,3,3-tetrafluoropropene.
A kit comprising:
- a heat-transfer fluid comprising 2,3,3,3-tetrafluoropropene and 1,1,1,2-tetrafluoroethane;
- a lubricant oil comprising a polyalkylene glycol;
- the kit adapted for use in a heat-transfer installation comprising a vapor compression circuit, wherein the polyalkylene glycol is used in a proportion of from 5% to 50% relative to the sum of the polyalkylene glycol and of the heat-transfer fluid.
Dependencies are inferred from the claim text.