Stabilized heat transfer compositions, methods and systems
AssigneeHoneywell International Inc.
InventorGREGORY LAURENCE SMITH
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Abstract
The present invention relates to heat transfer compositions comprising refrigerant, lubricant and stabilizer, wherein the refrigerant comprises 39 to 45% by weight difluoromethane (HFC-32), 1 to 4% by weight pentafluoroethane (HFC-125), and 51 to 57% by weight trifluoroiodomethane (CF3I), and wherein said lubricant comprises polyol ester (POE) lubricant and/or polyvinyl ether (PVE) lubricant, and wherein said stabilizer comprises an alkylated naphthalene and optionally but preferably an acid depleting moiety.
Claims20
A heat transfer compositions comprising refrigerant, lubricant and stabilizer, said refrigerant consisting essentially of the following three compounds, with each compound being present in the following relative percentages:
- 39 to 45% by weight difluoromethane (HFC-32),
- 1 to 4% by weight pentafluoroethane (HFC-125), and
- 51 to 57% by weight trifluoroiodomethane (CF3I),
- said lubricant comprising polyol ester (POE) lubricant and/or polyvinyl ether (PVE) lubricant, and said stabilizer comprising alkylated naphthalene, wherein said alkylated naphthalene is present in the composition in an amount of from 1% to less than 10% by weight based on the weight of the alkylated naphthalene and the lubricant.
Dependencies are inferred from the claim text.