Heat accumulating material

Details Heat accumulating material Heat accumulating material

1981-09-21

1983-09-27

Kittle, John E.

Compositions

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

252 71, 252 73, 252 75, 252 785, 126900, 16510417, C09K 334, C09K 500, C09K 506

Patent

active

044068042

ABSTRACT:
The heat accumulating material provided according to this invention makes use of the latent heat of fusion of sodium acetate trihydrate, and it comprises, as blended in a system consisting of sodium acetate and water, at least one nucleation catalyst selected from the group of compounds consisting of tetrasodium pyrophosphate, trisodium monohydrogenpyrophosphate, disodium dihydrogenpyrophosphate and monosodium trihydrogenpyrophosphate. In use of this heat accumulating material, the sodium acetate trihydrate would not be overcooled owing to the overcooling preventing function of the nucleation catalyst but is unfailingly crystallized at a temperature close to the fusion point thereof to radiate latent heat of fusion. The overcooling preventing performance of the nucleation catalyst is not deteriorated even if it is subjected to more than 1,000 cycles of repetition of fusion and solidification, and thus the heat accumulating material maintains a very stabilized heat absorbing and radiating capacity.

REFERENCES:
patent: 266205 (1882-10-01), Roth
patent: 1887618 (1932-11-01), Bell
patent: 1894775 (1933-01-01), Levenson
patent: 2233185 (1941-02-01), Smith
patent: 3944494 (1976-03-01), Mahler

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