Vapor cycle engine having a trifluoroethanol and ammonia working fluid
AssigneeThermo Electron Corporation
InventorJerry P. Davis
Life of this patent
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Abstract
A closed vapor cycle engine which uses a trifluoroethanol working fluid improved by the addition of ammonia for corrosion protection. The working fluid may contain water. The improvement improves life and reduces maintenance of the engine.
Claims14
A closed vapor cycle engine having iron alloy parts comprising:
- a trifluoroethanol working fluid wherein said working fluid is in contact with said iron alloy parts of said engine;
- vapor generating means for vaporizing said working fluid;
- expander means for expanding working fluid vapor to produce work;
- condenser means for condensing expanded working fluid vapor to liquid;
- and
- pump means to introduce condensed working fluid vapor to said vapor generator;
- wherein said working fluid further comprises ammonia in sufficient quantity to inhibit corrosion of said iron alloy parts.
A closed vapor cycle engine having iron alloy parts comprising:
- a trifluoroethanol working fluid containing between 1 and 40 percent by weight of water wherein said working fluid is in contact with iron alloy parts of said engine;
- vapor generating means for vaporizing said working fluid;
- expander means for expanding working fluid vapor to produce work;
- condenser means to condense expanded working fluid vapor to liquid;
- and
- pump means to introduce condensed working fluid vapor to said vapor generator;
- wherein said working fluid further comprises ammonia for inhibiting corrosion of said iron alloy parts.
A closed vapor cycle engine comprising iron alloy parts and working fluid contact with said iron alloy parts, wherein said working fluid comprises about 96.5 percent by weight of trifluoroethanol, 3 percent by weight of water, and 0.5 percent by weight of ammonia.
Dependencies are inferred from the claim text.