Non-aqueous heat transfer fluid and use thereof
OwnerJohn W. Evansinventor
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Abstract
The present invention is directed to a heat transfer system comprising a heat transfer fluid. The heat transfer fluid comprising non-buffered propylene glycol, and at least one propylene glycol soluble additive selected from the group consisting of a molybdate salt, a nitrate compound and an azole compound.
Claims43
A heat transfer system comprising a non-aqueous heat transfer fluid,
- the heat transfer fluid comprising propylene glycol containing less than about 0.5 weight percent water and about 0.05 to about 5.0 weight percent of at least one propylene glycol soluble additive selected from the group consisting of a molybdate salt, nitrate compound and an azole compound, wherein the heat transfer fluid contains no additive that requires water in the heat transfer fluid to dissolve the additive or enable the additive to function.
A non-aqueous heat transfer fluid composition effective for use in heat exchange systems comprising propylene glycol containing less than about 0.5 weight percent water and about 0.05 to about 5.0 weight percent of at least one propylene glycol soluble additive selected from the group consisting of a molybdate salt, a nitrate compound and an azole compound, wherein the heat transfer fluid contains no additive that requires water in the fluid to dissolve the additive or to enable the additive to function.
A method of cooling a heat exchange system which comprises circulating a composition in said system, said composition comprising propylene glycol containing less than about 0.5 weight percent water and about 0.05 to about 5.0 weight percent of at least one propylene glycol soluble additive selected from the group consisting of a molybdate salt, a nitrate compound and an azole compound, wherein the heat transfer fluid contains no additive that requires water in the fluid to dissolve the additive or to enable the additive to function.
A non-aqueous heat transfer fluid composition effective for use in heat exchange systems consisting essentially of a non-buffered propylene glycol and about 0.05 to about 5.0 weight percent of at least one propylene glycol soluble additive selected from the group consisting of a molybdate salt, a nitrate compound and an azole compound, the composition comprising less than about 0.5 weight percent water.
A method of cooling a heat exchange system which comprises circulating a composition in said system, said composition consisting essentially of propylene glycol containing less than about 0.5 weight percent water and about 0.05 to about 5.0 weight percent of at least one propylene glycol soluble additive selected from the group consisting of a molybdate salt, a nitrate compound and an azole compound, the composition comprising less than about 0.5 weight percent water, wherein the heat transfer fluid contains no additive that requires water in the fluid to dissolve the additive or to enable the additive to function.
A non-aqueous heat transfer fluid for use in a heat transfer system comprising:
- a. propylene glycol;
- b. ethylene glycol in the range of between 0 and 60 weight percent of the total weight of the propylene glycol and the ethylene glycol in the heat transfer fluid;
- and
- c. about 0.05 to about 5.0 weight percent of at least one additive soluble in propylene glycol selected from the group consisting of a molybdate salt, nitrate compound, and an azole compound, wherein the heat transfer fluid contains no additive that requires water in the fluid to dissolve the additive or to enable the additive to function, and wherein the resulting heat transfer fluid contains less than about 0.5 weight percent water.
Dependencies are inferred from the claim text.