Heat transfer compositions comprising 2,3,3,3-tetrafluoropropene and ammonia
AssigneeArkema France
InventorsSophie Guerin, Wissam Rached
Life of this patent
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Abstract
The invention relates to a composition comprising: a heat-transfer fluid comprising from 15% to 30% ammonia and from 70% to 85% 2,3,3,3-tetrafluoropropene; and a lubricant oil comprising a polyalkylene glycol. The invention also relates to the use of ammonia for increasing the miscibility of 2,3,3,3-tetrafluoropropene with the polyalkylene glycol, and vice versa.
Claims28
Composition comprising:
- a heat-transfer fluid consisting essentially of a quasi-azeotropic or azeotropic composition of from 15% to 30% ammonia and from 70% to 85% 2,3,3,3-tetrafluoropropene;
- and
- a lubricant oil comprising a polyalkylene glycol, in which the lubricant oil represents from 1% to 99% of the composition.
A vapour compression circuit comprising a polyalkylene glycol lubricant oil in combination with a heat-transfer fluid, the heat-transfer fluid consisting essentially of a quasi-azeotropic or azeotropic composition of from 15% to 30% ammonia and from 70% to 85% 2,3,3,3-tetrafluoropropene,
- in which 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 comprising adding ammonia, to result in composition comprising the lubricant oil and a heat-transfer fluid, the heat-transfer fluid consisting essentially of a quasi-azeotropic or azeotropic composition of ammonia and 2,3,3,3-tetrafluoropropene, and in which the lubricant oil is used in a proportion of from 5% to 50%, relative to the sum of the lubricant oil, 2,3,3,3-tetrafluoropropene and ammonia.
A method for increasing the miscibility of ammonia with a lubricant oil comprising adding 2,3,3,3-tetrafluoropropene, to result in composition comprising the lubricant oil and a heat-transfer fluid, the heat-transfer fluid consisting essentially of a quasi-azeotropic or azeotropic composition of ammonia and 2,3,3,3-tetrafluoropropene, and in which the lubricant oil is used in a proportion of from 5% to 50%, relative to the sum of the lubricant oil, 2,3,3,3-tetrafluoropropene and ammonia.
Dependencies are inferred from the claim text.