Analysis of the Applicability of Effective Thermophysical Properties to Composite Phase Change Materials

Zi Wei Li; Elisabetta Gariboldi

doi:10.4028/www.scientific.net/MSF.1016.813

Paper Titles

Structural Characterization of a Biogenic Secretion Extracted from the Tendon or Ligament in Rabbits for Artificial Ligament Formation
p.786

Enhancing High-Temperature Creep Resistance of In Situ TiAl-Based Matrix Composite by Low Volume Fraction of Ti₂AlC Particles
p.792

Impact of Microstructural Anisotropy of As-Cold-Sprayed Cu Deposits on its Annealing Effect
p.798

Performance of 14Cr ODS-FeCrAl Cladding Tube for Accident Tolerant Fuel
p.806

Analysis of the Applicability of Effective Thermophysical Properties to Composite Phase Change Materials
p.813

Long Term Stability Evaluation of Stress Improvement Effect on Ni-Based Alloy Welds by Various Residual Stress Improvement Methods
p.819

Inhomogeneous Microstructure and its Thermal Stability of AlSi10Mg Lattice Structure Manufactured via Laser Powder Bed Fusion
p.826

Study of Nb Solubility in Hot Charging Process
p.832

Cold Spraying of IN 718-Ni Composite Coatings: Microstructure Characterization and Tribological Performance
p.840

HomeMaterials Science ForumMaterials Science Forum Vol. 1016Analysis of the Applicability of Effective...

Analysis of the Applicability of Effective Thermophysical Properties to Composite Phase Change Materials

Abstract:

Coarse form-stable phase change materials (FS-PCMs) can tailor the properties of pure PCMs. This is often attained by the presence of high-melting, high-thermal conductivity metallic phase which enhances the thermal energy storage/release. The evaluation of the thermal response of these composite materials in unsteady conditions, is not an easy task, and simplifications introduced to deal with them must be carefully considered. A set of FS-PCMs of prismatic geometry with polymeric wax as PCM and an Al foam with various pore sizes, modelled as BCC lattice has been considered in this paper. The thermal response under a set of boundary conditions with constant heat flux at the bottom surface, all other being adiabatic, was investigated both by direct simulations approach modelling the two phases and the ‘1-temperature model’, which considers the material as homogeneous and characterized by a proper set of effective properties. The ‘1-temperature model’ is able to closely reproduce the whole the local thermal history only within certain validity ranges, even if it can well reproduce the ‘average’ energy storage due to the transformation of the PCM phase.