Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon

Davoud Jafari*, Sauro Filippeschi, Alessandro Franco, Paolo Di Marco

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    The use of the two-phase closed thermosyphons (TPCTs) is increasing for many heat transfer applications. In this study, the development of a numerical model is presented with the purpose of determining the transient characteristics of a TPCT. The model includes the heat transfer through the wall, vapour core, liquid pool and the falling condensate film. The complete two-dimensional conservation equations for mass, momentum, and energy are solved using finite volume scheme for the vapour flow and pipe wall. The liquid film is modelled using a one dimensional quasi-steady Nusselt type solution. The model is validated by comparison with existing experimental data. The effect of filling ratio (volume of working fluid to evaporator section) for a copper thermosyphon has been investigated. Water is used as a working fluid for different filling ratio from 20 to 100%. The investigations are aimed to determine working thermal performance of a TPCT at different filling ratio for solar energy applications.

    Original languageEnglish
    Title of host publicationProceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015
    Place of PublicationOttawa
    PublisherAvestia Publishing
    ISBN (Print)9781927877173
    Publication statusPublished - 1 Jan 2015
    EventProceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015 - Barcelona, Spain
    Duration: 20 Jul 201521 Jul 2015

    Publication series

    NameProceedings of the World Congress on Mechanical, Chemical, and Material Engineering
    ISSN (Electronic)2369-8136

    Conference

    ConferenceProceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015
    Abbreviated titleMCM 2015
    CountrySpain
    CityBarcelona
    Period20/07/1521/07/15

    Keywords

    • Filling ratio
    • Numerical simulation
    • Two phase closed thermosyphon

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