TY - JOUR
DP - National Agricultural Library
DB - PubAg
JO - Applied energy
TI - CFD analysis of melting process in a shell-and-tube latent heat storage for concentrated solar power plants
A1 - Fornarelli, F.
A4 - Fornarelli, F.
A4 - Camporeale, S.M.
A4 - Fortunato, B.
A4 - Torresi, M.
A4 - Oresta, P.
A4 - Magliocchetti, L.
A4 - Miliozzi, A.
A4 - Santo, G.
EP - 2016 v.164
KW - equations
KW - geometry
KW - gravity
KW - heat transfer
KW - melting
KW - power plants
KW - solar energy
KW - steel
KW - temperature profiles
AN - 5639412
AB - A latent heat storage system for concentrated solar plants (CSP) is numerically examined by means of CFD simulations. This study aims at identifying the convective flows produced within the melted phase by temperature gradients and gravity. Simulations were carried out on experimental devices for applications to high temperature concentrated solar power plants. A shell-and-tube geometry composed by a vertical cylindrical tank, filled by a Phase Change Material (PCM) and an inner steel tube, in which the heat transfer fluid (HTF) flows, from the top to the bottom, is considered. The conjugate heat transfer process is examined by solving the unsteady Navierâ€“Stokes equations for HTF and PCM and conduction for the tube. In order to take into account the buoyancy effects in the PCM tank the Boussinesq approximation is adopted. The results show that the enhanced heat flux, due to natural convective flow, reduce of about 30% the time needed to charge the heat storage. A detailed description of the convective motion in the melted phase and the heat flux distribution between the HTF and PCM are reported. The effect of the mushy zone constant is also investigated.
PY - 2016
LA -
DA - 2016-02-15
VL - v. 164
SP - pp. 12-722
DO - 10.1016/j.apenergy.2015.11.106
ER -