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An Effective Thermal Conductivity-based Approach for Modelling of Convective Heat Transfer in a Rectangular Cavity Filled with PCM

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU149201" target="_blank" >RIV/00216305:26210/23:PU149201 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.cetjournal.it/cet/23/103/120.pdf" target="_blank" >https://www.cetjournal.it/cet/23/103/120.pdf</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3303/CET23103120" target="_blank" >10.3303/CET23103120</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    An Effective Thermal Conductivity-based Approach for Modelling of Convective Heat Transfer in a Rectangular Cavity Filled with PCM

  • Original language description

    This paper presents a numerical modelling approach to investigate convective heat transfer in a rectangular cavity filled with a Phase Change Material (PCM), specifically organic paraffin-based Rubitherm RT 35 HC. Natural convection occurs during both the melting and solidification processes due to the changes in the density of a liquid PCM. Therefore, a significant enhancement of the heat transfer in the upper part of the cavity can be observed. The study aims to investigate, both experimentally and numerically, the effect of convective flow on the overall heat transfer performance of a PCM in the cavity. The computational analysis was performed using a two-dimensional explicit finite difference model implemented in MATLAB. To accurately represent the thermal behaviour of the PCM enclosed in a cavity, the proposed modelling approach incorporates the effects of natural convection by considering the effective thermal conductivity of the PCM as a function of both temperature and position within the cavity. By doing so, heat transfer in the upper part of the cavity is enhanced while heat transfer in the bottom part is mitigated, resulting in a more precise representation of the actual thermal behaviour of the PCM. The comparison between the constant thermal conductivity and the effective thermal conductivity with a linear increase has been made, resulting in a significant improvement in the model accuracy. The analysis demonstrated that the effective thermal conductivity approach led to a significant improvement in the accuracy of the numerical model. Specifically, a reduction of 47.5 % was observed in the root mean square error (RMSE) value, decreasing from 4.0 K to 1.9 K.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database

  • CEP classification

  • OECD FORD branch

    20303 - Thermodynamics

Result continuities

  • Project

    <a href="/en/project/GA22-31173S" target="_blank" >GA22-31173S: Adaptive soft computing framework for inverse heat transfer problems with phase change</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Chemical Engineering Transactions

  • ISSN

    2283-9216

  • e-ISSN

  • Volume of the periodical

    103

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    IT - ITALY

  • Number of pages

    6

  • Pages from-to

    715-720

  • UT code for WoS article

  • EID of the result in the Scopus database

    2-s2.0-85179030017