Characteristics of natural convection in n-eicosane in a square cavity with discrete heat source

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-10
Major/Subject
Mcode
Degree programme
Language
en
Pages
17
Series
Case Studies in Thermal Engineering, Volume 27
Abstract
The natural convection of phase change material (PCM) in a two-dimensional square cavity is numerically analyzed. The cavity consists of heat surface with a constant total heated area and adiabatic wall. The Grashof and Prandtl numbers for the PCM (n-eicosane with the melting temperature, Tmelt=36°C) in basic LHS system are 9 × 10^5 and 62.7, respectively, at 350.15K. The mass, momentum and energy balance equations of the system were considered. Three basic heating surface strategies were considered (discrete heat sources): single, side-side and side-bottom heating surface. The results show that the transient Nusselt number, mean kinetic energy at the surface and energy storage rate of the fluid are effectively enhanced by proper arrangement of the discrete heat source location and heating from the bottom half of the left and right sides requires the least time for 300 kJ energy storage. The results indicate that optimally placed discrete heat sources in PCM could be a promising alternative for high-efficientthermal energy storage.
Description
Funding Information: This study was supported by “ the Fundamental Research Funds for the Central Universities ”(Grand NO. 2242021k30028 ). Publisher Copyright: © 2021 The Authors
Keywords
Discrete heat source, Latent heat storage, N-eicosane, Natural convection, Phase change material, Square cavity
Other note
Citation
Yang , S , Huang , B , Wang , J & Lund , P D 2021 , ' Characteristics of natural convection in n-eicosane in a square cavity with discrete heat source ' , Case Studies in Thermal Engineering , vol. 27 , 101245 . https://doi.org/10.1016/j.csite.2021.101245