THERMAL ENERGY STORAGE MATERIAL COMPOSITION

PURPOSE:To provide a thermal energy storage material compsn. which can be repeatedly used and dissipates heat only when required, containing a salt hydrate which can be supercooled and emits latent heat in the transition from a high- temperature phase to a low-temperature phase, and a hydroxylpropylated guar gum. CONSTITUTION:The titled thermal energy storage material contains a salt hydrate (A) (e.g. calcium chloride hexahydrate or sodium carbonate decahydrate) which can be supercooled and emits latent heat in the transition from a high- temperature phase to a low-temperature phase, and 0.2-1.5wt% (based on the quantity of compsn.) hydroxypropylated guar gum (B) as essential ingredients. The compsn. accumulates latent heat by heating and retains the latent heat in a supercooling state at room temp. When required, a seed crystal is added thereto, or a stimulus is given to the compsn. by a sharp metal stick to thereby break supercooling, whereby latent heat is dissipated. In this way, the heating and the breaking of supercooling are repeatedly made, whereby thermal energy storage and heat dissipation can be repeated.