Heat exchange fluids
AssigneeWeatherford/Lamb, Inc.
InventorsKevin W. Smith, Larry W. Gatlin, John H. Hallman
Life of this patent
Estimating the term…
Abstract
Carboxylate salts of amines are used as components of heat exchange fluids. The amines may have a ratio of N to C of 1:0 to 1:12 and the carboxylate anion may be derived from an acid of the formula H(CH2)0-3COOH. A preferred monoamine heat exchange fluid utilizes triethanolamine formate. Lower carboxylate salts of diamines and triamines having the formula R2[N[(CH2)mNR]1-2]R where each R is independently selected from moieties of the formula —CnH2n+1 and moieties of the formula H[O(CH2)1-4]—, each m is independently a number from 1 to 6, and each n is a number from 1 to 4, are disclosed as compounds.
Claims21
A method of transferring heat energy from a first location to a second location, comprising:
- absorbing heat energy at said first location into an aqueous solution, the solution comprising:
- an amine carboxylate, the amine portion of said amine carboxylate having an atomic ratio of N to C from 1:0 to 1:12, wherein said amine carboxylate in said solution has the formula R3NH+H(CH2)0-3COO—where each R is independently selected from moieties of the formula CnH2n+1 and moieties of the formula H[O(CH2)1-4]—, where n is an integer from 0 to 4 and at least one R includes a carbon atom;
- and
- the carboxylate portion being derived from an acid of the formula H(CH2)0-3COOH;
- and desorbing said heat energy from said amine carboxylate solution at said second location.
A method of transferring heat through a heat exchange surface, comprising:
- absorbing said heat into a solution of triethanolamine formate in contact with said heat exchange surface;
- and
- circulating said solution to a second heat exchange surface.
A method of transferring heat energy from a first location to a second location, comprising:
- absorbing heat energy at said first location into an aqueous solution, the solution comprising:
- an amine carboxylate, the amine portion of said amine carboxylate having an atomic ratio of N to C from 1:0 to 1:12, wherein said amine portion of said amine carboxylate satisfies the formula R2 N(CH2)mNR2 where each R is independently selected from moieties of the formula Cn H2n+1 and moieties of the formula H[O(CH2)1-4]—, where n is an integer from 0 to 4 and m is an integer from 1 to 6;
- and
- the carboxylate portion being derived from an acid of the formula H(CH2)0-3COOH;
- and desorbing said heat energy from said amine carboxylate solution at said second location.
Dependencies are inferred from the claim text.