Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
A SURROGATE MODEL BASED ON PROPER ORTHOGONAL DECOMPOSITION AND RADIAL BASIS FUNCTIONS FOR THE ANALYSIS OF PHASE CHANGE MATERIALS CONTAINING NANOPARTICLES
Submission Author:
Bruno Jaccoud , RJ , Brazil
Co-Authors:
Bruno Jaccoud, Helcio Orlande, Marcelo Colaco, Ryszard Bialecki, Zbigniew Buliński, Ziemowit Ostrowski
Presenter: Bruno Jaccoud
doi://10.26678/ABCM.COBEM2019.COB2019-0542
Abstract
Considerable amount of thermal energy can be stored when a material undergoes phase change, with melting temperatures that can be suitable for several practical applications, like in solar energy. Recently, nanoparticles dissolved in the PCM have been used to enhance the thermal storage. This work deals with the numerical simulation of PCM’s containing nanoparticles, used for the thermal storage of solar energy. Energy, momentum and mass conservation equations were solved numerically with finite volumes and the enthalpy method, for a two-dimensional rectangular geometry, taking into account buoyancy effects. The PCM adopted was a paraffin (C28H58) containing copper nanoparticles (1% volume concentration). The main objective of this work was to introduce a surrogate model for this problem, aiming at a drastic reduction of computational time, which can allow for future online state estimation with Bayesian techniques, like the Particle Filter. The surrogate model was based on the Proper Orthogonal Decomposition and Radial Basis Functions. The complete model solution, obtained with a finite volume computer code, was used to generate the POD basis. The coefficients for the POD basis were then expressed as a linear combination of radial basis functions, for the variables of interest
Keywords
Phase Change Material, Solar Energy Storage, Surrogate model, Proper Orthogonal Decomposition, Radial basis functions
