Heat Transfer Compositions, Systems, and Methods
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United States of America Patent
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Issued Date -
Sep 22, 2016
app pub date -
May 20, 2016
filing date -
Jun 6, 2014
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Abstract
Heat transfer compositions, methods, efficiencies, and systems are disclosed. The compositions have four or more heat transfer components/constituents that have been selected such that the compositions provide a flammability rating of Al or better as defined by IS0817:2014, and a 14% or greater variance-to-liquid pressure at a temperature of 37.8° C. (100° F.). The compositions also reduce the amount of R125 needed to achieve a flammability rating of Al or better. The method of designing an HCFC-free heat transfer composition includes selecting four or more constituents with staggered boiling temperatures and blending the constituents together.
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