TY - JOUR
T1 - Characteristics of natural convection in n-eicosane in a square cavity with discrete heat source
AU - Yang, Shimi
AU - Huang, Bingkun
AU - Wang, Jun
AU - Lund, Peter D.
N1 - Funding Information:
This study was supported by “ the Fundamental Research Funds for the Central Universities ”(Grand NO. 2242021k30028 ).
Publisher Copyright:
© 2021 The Authors
PY - 2021/10
Y1 - 2021/10
N2 - 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-efficient thermal energy storage.
AB - 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-efficient thermal energy storage.
KW - Discrete heat source
KW - Latent heat storage
KW - N-eicosane
KW - Natural convection
KW - Phase change material
KW - Square cavity
UR - http://www.scopus.com/inward/record.url?scp=85110713234&partnerID=8YFLogxK
U2 - 10.1016/j.csite.2021.101245
DO - 10.1016/j.csite.2021.101245
M3 - Article
AN - SCOPUS:85110713234
SN - 2214-157X
VL - 27
JO - Case Studies in Thermal Engineering
JF - Case Studies in Thermal Engineering
M1 - 101245
ER -
