Effect of ultrasonic irradiation on nucleation phenomena in a Na2HPO4 · 12H2O melt being used as a heat storage material

Etsuko Miyasaka, Masakazu Takai, Hideto Hidaka, Yoshihide Kakimoto, Izumi Hirasawa

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    Abstract

    The effect of ultrasound on nucleation phenomena in the heat storage material Na2HPO4 · 12H2O was investigated by determining the primary nucleation probability and induction time, and by looking at heat generation phenomena in the initial stage of nucleation. The experimental results show that the primary nucleation probability dramatically increased, and the induction time decreased under the ultrasound irradiation, and in addition, the rate of temperature rise was dependent upon the ultrasonic output. Based on these results and the theoretical relationship between the number of primary nuclei and the heat generation rate, it is proposed that the number of primary nuclei depends upon the ultrasonic output.

    Original languageEnglish
    Pages (from-to)308-312
    Number of pages5
    JournalUltrasonics Sonochemistry
    Volume13
    Issue number4
    DOIs
    Publication statusPublished - 2006 May

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    Keywords

    • Crystallization
    • Heat generation rate
    • Heat storage material
    • Primary nucleation
    • Ultrasound

    ASJC Scopus subject areas

    • Safety, Risk, Reliability and Quality
    • Acoustics and Ultrasonics

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