Coolant mixtures for use in heat-exchange devices in the aerospace field
AssigneesSafran Electrical & Power, Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique De Toulouse, Ecole Nationale Superieure De Chimie De Lille, Universite des Sciences et Technologies de Lille
InventorsNicolas Delalandre, Benjamin Roland Stanislas Joossen, Jean-Marie Aubry, Vincent Gerbaud, Ivonne Rodriguez-Donis
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Abstract
A coolant mixture including water and at least one of the compounds chosen from 1-methoxy-2-propanol and 1-ethoxy-2-propanol in the proportions of the corresponding azeotrope or in near-azeotropic proportions. Such a mixture can be used as a heat-transfer fluid in a heat-exchange device, which can be incorporated into an aircraft or spacecraft. A method for obtaining a mixture by fractional distillation is also disclosed.
Claims18
A coolant mixture, comprising a binary mixture of water and 1-ethoxy-2-propanol in azeotropic or near-azeotropic proportions, wherein the 1-ethoxy-2-propanol represents 46 to 54%, of the total weight of the binary mixture at atmospheric pressure.
A coolant mixture, comprising a ternary mixture of water, 1-methoxy-2-propanol and 1-ethoxy-2-propanol in azeotropic or near-azeotropic proportions, wherein the ternary mixture comprises:
- 37 to 45% by weight of 1-methoxy-2-propanol,
- 24 to 32% by weight of 1-ethoxy-2-propanol, and
- 27 to 35% by weight of water relative to a total weight of the ternary mixture at atmospheric pressure.
Dependencies are inferred from the claim text.