Heat transfer compositions with high electrical resistance for fuel cell assemblies
AssigneeHoneywell International Inc.
InventorsCarol S. Jeffcoate, Aleksei V. Gershun, Peter M. Woyciesjes, Filipe J. Marinho
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Abstract
The present invention relates generally to heat transfer compositions. More particularly, the present invention relates to heat transfer compositions with high electrical resistance for use in power-generating equipment or in engines. Such compositions are particularly useful in fuel cell assemblies.
Claims17
A fuel cell system comprising one or more fuel cell assemblies and a heat transfer composition, the heat transfer composition comprising:
- (a) from about 20% to about 80% by weight of an alcohol;
- (b) from about 1% to about 90% by weight of a polyalkylene oxide;
- (c) from about 1% to about 30% by weight of an additive;
- and
- (d) balance being water;
- wherein said composition has an electrical resistance greater than about 5 KΩ·cm and
- wherein said composition is used in a fuel cell assembly.
A fuel cell system comprising one or more fuel cell assemblies and a heat transfer composition, the heat transfer composition comprising:
- (a) from about 30% to about 70% by weight of an alcohol;
- (b) from about 3% to about 50% by weight of a polyalkylene oxide;
- (c) from about 2% to about 20% by weight of an additive;
- and
- (d) balance being water;
- and
- wherein said composition has an electrical resistance greater than about 5 KΩ·cm and is used in a fuel cell assembly.
A fuel cell system comprising one or more fuel cell assemblies and a heat transfer composition, the heat transfer composition comprising:
- (a) from about 40% to about 60% by weight of an alcohol;
- (b) from about 5% to about 25% by weight of a polyalkylene oxide;
- (c) from about 5% to about 10% by weight of an additive;
- and
- (d) balance being water;
- and
- wherein said composition has an electrical resistance greater than about 5 KΩ·cm and is used in a fuel cell assembly.
A method for removing heat from a fuel cell assembly, comprising the step of contacting the fuel cell assembly with a heat transfer composition, the heat transfer composition comprising:
- (a) from about 20% to about 80% by weight of an alcohol;
- (b) from about 1% to about 90% by weight of a polyalkylene oxide;
- (c) from about 1% to about 30% by weight of an additive;
- and
- (d) balance being water;
- wherein said composition has an electrical resistance greater than about 5 KΩ·cm and
- wherein said composition is used in a fuel cell assembly.
Dependencies are inferred from the claim text.