Low GWP fluids for high temperature heat pump applications
AssigneeHoneywell International Inc.
InventorsSamuel F. Yana Motta, Mark W. Spatz, Ankit Sethi
Life of this patent
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Abstract
The present invention relates, in part, to heat transfer compositions, and associated systems and methods, which include a first composition selected from the group consisting of HFO-1233zd, HFC-245fa, and combinations of these; and, optionally, a second composition selected from the group consisting of HFO-1234ze, HFC-134a, and combinations of these.
Claims12
A high temperature heat pump system comprising a compressor, an evaporator, and a condenser operating at a condenser temperature of greater than 100° C., wherein a heat transfer composition flows through the system, the heat transfer composition comprising a refrigerant having a global warming potential (GWP) of not greater than about 150and comprising:
- a. from about 90% to about 95% by weight of HFO-1233zd, wherein said HFO-1233zd consists essentially of HFO-1233zd(E);
- and
- b. from about 5% to about 10% by weight of HFC-134a, provided the refrigerant has:
- (1) a capacity of at least about 90% relative to CFC-114 in said a high temperature heat pump system;
- (2) a COP of at least about 95% relative to CFC-114 in said a high temperature heat pump system;
- and (3) a glide of less than about 3° C. in said a high temperature heat pump.
A method of transferring heat to or from a fluid or body in a high temperature heat pump system comprising
- providing a high temperature heat pump composition comprising from about 90% to less than about 100% by weight of HFO-1233zd;
- and from greater than about 0% to about 10% by weight of HFC-134a, provided that the heat transfer composition has one or more of the following:
- (1) a capacity between about 90% and about 110% relative to CFC-114 in a high temperature heat pump system;
- (2) a COP of at least about 95% relative to CFC-114 in a high temperature heat pump system;
- or (3) a glide of less than about 3° C. in a high temperature heat pump system;
- providing the high temperature heat pump composition within the system and flowing the high temperature heat pump composition through said system;
- causing a phase change in said high temperature heat pump composition, and
- exchanging heat with said fluid or body during said phase change.
Dependencies are inferred from the claim text.