| 摘要 |
PURPOSE:To provide a thermal energy storage material which scarcely exhibits a supercooling phenomenon, has stable heat absorption performance, is inexpensive and has a large thermal energy storage capacity, by incorporating a specified fluoride as a nucleating agent in a system consisting of sodium acetate and water. CONSTITUTION:A thermal energy storage material is obtd. by incorporating a fluoride (e.g. NaF, NaHF2, SrF2, MnF2 or CaF2) in a system consisting of sodium acetate and water, said fluoride being not molten or decomposed at a temp. of up to 80 deg.C. Among inorg. hydrates, CH3COONa.3H2O (m.p. of 58 deg.C) has large thermal energy storage capacity and has long been expected as a thermal energy storage material for heating. However, CH3COONa.3H2O has a disadvantage in that once it is melted, it is liable to cause supercooling. By incorporating said fluoride as a nucleating agent, the supercooling phenomenon can be inhibited and stable heat absorption performance can be imparted.
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