Abstract

When a phase change material (PCM) is stored in the supercooled state and is gotten to start solidification to demand, the heat of solidification of the PCM can be stored at low heat loss for a long term. Thus the influence of the mass of PCM that is filled up in a capsule on the maximum degree of supercooling was investigated using several promising PCMs to evaluate the functional utility as PCMs. As a result, it was found that the maximum degree of supercooling of erythritol or threitol was large and depended on the mass strongly, so that the two materials are useful for using supercooling phenomenon. However, it was found to be difficult to use the supercooled phenomenon of polyethylene glycol effectively because the maximum degree of supercooling of the material is small and little depends on the mass.

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