• Login
    View Item 
    •   DSpace Home
    • Researchers
    • Nasrul Amri Mohd Amin, Assoc. Prof. Ir. Ts. Dr.
    • View Item
    •   DSpace Home
    • Researchers
    • Nasrul Amri Mohd Amin, Assoc. Prof. Ir. Ts. Dr.
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Effective thermal conductivity for melting in PCM encapsulated in a sphere

    Thumbnail
    View/Open
    Effective thermal conductivity for melting in PCM encapsulated in a sphere-abstract.pdf (58.72Kb)
    Date
    2014-06
    Author
    Nasrul Amri, Mohd Amin, Dr.
    Bruno, Frank, Dr.
    Belusko, Martin
    Metadata
    Show full item record
    Abstract
    Heat transfer in phase change materials (PCMs) contained in spherical encapsulations can be modelled more simply if an effective thermal conductivity can be determined to represent the natural convection occurring within the PCMs. Previous research has shown that natural convection in PCM can be characterised by a constant effective thermal conductivity during the melting process. However, this research did not consider the impact of the increased buoyancy forces with increased temperature difference between the heat transfer fluid flowing around the encapsulation and the PCM. An experimental study was conducted on the heat transfer through a single sphere subject to varying temperature differences. A computational fluid dynamics (CFD) model which ignored buoyancy of the PCM in a sphere was developed. Using this CFD model, the effective thermal conductivity of the liquid portion of the PCM was determined by correlating data from the model against experimental data at various temperature differences with water as the PCM. A suitable relationship for the effective thermal conductivity was developed as a function of the Rayleigh number. This empirical correlation applies to the geometry and PCM used in this study. The study demonstrates the applicability of determining effective thermal conductivity relationships to represent natural convection in PCM thermal storage systems. This correlation can be directly applied to numerical models of PCM storage systems with spheres.
    URI
    http://www.sciencedirect.com/science/article/pii/S0306261914001020
    http://dspace.unimap.edu.my:80/dspace/handle/123456789/35157
    Collections
    • Nasrul Amri Mohd Amin, Assoc. Prof. Ir. Ts. Dr. [19]

    Atmire NV

    Perpustakaan Tuanku Syed Faizuddin Putra (PTSFP) | Send Feedback
     

     

    Browse

    All of UniMAP Library Digital RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Atmire NV

    Perpustakaan Tuanku Syed Faizuddin Putra (PTSFP) | Send Feedback