Experimental investigation of freezing and melting characteristics of graphene-based phase change nanocomposite for cold thermal energy storage applications

Shaji Sidney, Mohan Lal Dhasan, C. Selvam, Sivasankaran Harish

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    In the present work, the freezing and melting characteristics of water seeded with chemically functionalized graphene nanoplatelets in a vertical cylindrical capsule were experimentally studied. The volume percentage of functionalized graphene nanoplatelets varied from 0.1% to 0.5% with an interval of 0.1%. The stability of the synthesized samples was measured using zeta potential analyzer. The thermal conductivity of the nanocomposite samples was experimentally measured using the transient hot wire method. A ~24% (maximum) increase in the thermal conductivity was observed for the 0.5% volume percentage in the liquid state, while a ~53% enhancement was observed in the solid state. The freezing and melting behavior of water dispersed with graphene nanoplatelets was assessed using a cylindrical stainless steel capsule in a constant temperature bath. The bath temperatures considered for studying the freezing characteristics were -6 °C and -10 °C, while to study the melting characteristics the bath temperature was set as 31 °C and 36 °C. The freezing and melting time decreased for all the test conditions when the volume percentage of GnP increased. The freezing rate was enhanced by ~43% and ~32% for the bath temperatures of -6 °C and -10 °C, respectively, at 0.5 vol % of graphene loading. The melting rate was enhanced by ~42% and ~63% for the bath temperatures of 31 °C and 36 °C, respectively, at 0.5 vol % of graphene loading.

    Original languageEnglish
    Article number1099
    JournalApplied Sciences (Switzerland)
    Volume9
    Issue number6
    DOIs
    Publication statusPublished - 2019

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Instrumentation
    • Engineering(all)
    • Process Chemistry and Technology
    • Computer Science Applications
    • Fluid Flow and Transfer Processes

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