Carbon dioxide co-fluid
AssigneeEmerson Climate Technologies, Inc.
InventorLouis Rebrovic
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Abstract
A carbon dioxide/co-fluid mixture is provided for use in a refrigeration cycle in which the carbon dioxide is alternately absorbed and desorbed from the co-fluid. Suitable co-fluids are selected from the class of alkoxylated carboxylic amides, wherein the amides are cyclic or non-cyclic. It has been discovered that N-2,5,8,11-tetraoxadodecyl-2-pyrrolidinone and its homologs exhibit an advantageous property of a high rate of desorption at lower temperatures.
Claims24
A compressor including a lubricant, wherein the lubricant comprises a compound selected from
- where m is 1 to 10;
- R is alkyl, alkenyl, or aryl with 1 to 26 carbon atoms;
- R′ is H or C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one R″ and R′″ is H;
- where m is 1 to 10;
- R is alkyl, alkenyl, or aryl with 1 to 26 carbon atoms;
- p is 1 to 3;
- R′ is H or C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one R″ and R′″ is H;
- where x is 1 to 4;
- n is 1 to 10;
- R′ is H or optionally substituted C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one R″ and R′″ is H;
- where y is 1 to 4;
- n is 1 to 10;
- p is 1 to 3;
- R′ is H or C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one R″ and R′″ is H;
- where z is 1 to 4;
- n is 1 to 10;
- R′ is H or optionally substituted C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one of R″ and R′″ is H;
- and
- where z is 1 to 4;
- n is 1 to 10;
- p is 1 to 3;
- R′ is H or optionally substituted C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one of R″ and R′″ is H.
A cooling composition comprising carbon dioxide and a co-fluid, wherein the co-fluid is selected from compounds of formula
- where m is 1 to 10;
- R is alkyl, alkenyl, or aryl with 1 to 26 carbon atoms;
- R′ is H or C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one R″ and R′″ is H;
- where x is 1 to 4;
- n is 1 to 10;
- R′ is H or optionally substituted C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one R″ and R′″ is H;
- and
- where y is 1 to 4;
- n is 1 to 10;
- p is 1 to 3;
- R′ is H or optionally substituted C1-6 alkyl;
- R″ is H, methyl, or ethyl;
- R′″ is H, methyl, or ethyl;
- and at least one R″ and R′″ is H.
Dependencies are inferred from the claim text.