Temperature control system using aqueous 1,3-propanediol solution
AssigneeThe Penray Companies, Inc.
InventorRichard P. Carr
Life of this patent
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Abstract
A temperature control system is described for producing and maintaining temperatures in a pre-defined space within a pre-defined temperature range. A working fluid comprising an aqueous solution of 1-3 propanediol is circulated through a heat transfer system in thermal communication with both the working fluid and the pre-defined space to produce and maintain the temperature in the pre-defined space that is within the pre-defined temperature range.
Claims26
A temperature control system to affect the temperatures of a pre-defined space, comprising:
- a working fluid comprising an aqueous solution of from 55% to 75% by weight 1,3-propanediol;
- and
- a closed loop refrigeration system that utilizes the working fluid to affect the temperature in the pre-defined space when the working fluid and the pre-defined space are in thermal communication.
A method for using a 1,3-propanediol solution comprising the steps of:
- formulating an aqueous solution of 1,3-propanediol having water in an amount sufficient to adjust the viscosity of the aqueous solution to below 600 centipoise within the temperature range of −40° F. to −10° F.;
- providing a closed loop refrigeration system in thermal communication with a pre-defined space;
- and
- circulating the 1,3-propanediol solution through the closed loop refrigeration system to affect a temperature of the predefined space.
A method for using a 1,3-propanediol comprising the steps of:
- formulating an aqueous solution of from 55% to 75% by weight 1,3-propanediol;
- providing a closed loop refrigeration system in thermal communication with a pre-defined space;
- and
- circulating the 1,3-propanediol solution through the closed loop refrigeration system to affect a temperature of the predefined space.
A temperature control system, comprising:
- a working fluid comprising an aqueous solution of from 55% to 75% by weight 1,3-propanediol;
- and
- means for affecting the temperature in the pre-defined space by placing the working fluid and the pre-defined space in thermal communication.
Dependencies are inferred from the claim text.