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Abstract: Phase change materials have supercooling characteristics that would benefit long-term latent heat thermal energy storage. This paper studied the physical and chemical properties associated with the growth rate of crystallization in disodium hydrogenphosphate dodecahydrate (DHD) as a function of a degree of supercooling. The transient plane source (TPS) technique was used to measure the thermal conductivity of the DHD samples. Results of the thermal conductivity test showed that the solid hydrate samples were almost twice as conductive as the liquid hydrate samples, but for both phases the thermal conductivities were relatively unaffected by the changing temperature.

Reference: Journal of Thermophysics and Heat Transfer, 16, 1 (2002) 135-140

DOI: 10.2514/2.6663