Heat accumulating material

Details Heat accumulating material Heat accumulating material

1982-07-12

1984-02-14

Kittle, John E.

Compositions

Frost-preventing, ice-thawing, thermostatic, thermophoric,...

423497, 564 63, C09K 506

Patent

active

044315589

ABSTRACT:
The heat accumulating material of this invention comprising three components of calcium chloride (CaCl.sub.2), urea [CO(NH.sub.2).sub.2 ] and water (H.sub.2 O) can have varied temperatures of heat accumulating and heat releasing between 15.degree. C. and 29.5.degree. C. by varying the proportion of said three components, and also has a large latent heat. Hence, much expectation can be placed on it as a heat accumulating material for air conditioning. Moreover, by adding BaFeO.sub.3-x (0.ltoreq.x.ltoreq.0.53) as a nucleating agent to the above-mentioned composition, supercooling can be greatly decreased and wider application of this heat accumulating material becomes possible.

REFERENCES:
Malec et al., "Heat of Solution of Urea in Water and Aqueous Solutions of Calcium Chloride . . . ", Rocz. Chem., 1971, 45 (9), 1369-1375.
Kuemmel et al., "Osmotic and Activity Coefficients in . . . Water-Calcium Chloride-Urea at 298.15K," Fluid Phase Equilib., 1978, 2(3), 215-223.

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