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 about 49% by weight difluoromethane (HFC-32), about 11.5% by weight pentafluoroethane (HFC-125), and about 39.5% 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 of the following three compounds, with each compound being present in the following relative percentages:
- about 49% by weight difluoromethane (HFC-32),
- about 11.5% by weight pentafluoroethane (HFC-125), and
- about 39.5% by weight trifluoroiodomethane (CF3I), wherein (i) said lubricant comprises polyol ester (POE) lubricant and/or polyvinyl ether (PVE) lubricant, (ii) said stabilizer comprises alkylated naphthalene, and (iii) 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.