3 documents found, page 1 of 1
Validation of a Simplified Numerical Model for Predicting Solid–Liquid Phase Ch...
Rosa, Nuno; Soares, Nelson; Costa, José; Lopes, António GameiroThis paper presents a numerical model for simulating melting and solidification driven by natural convection, and validates it against a previous experiment. The experiment involved filling a rectangular aluminum enclosure with RT28HC Phase Change Material (PCM) to 95% of its capacity. To investigate the thermal behavior of the PCM during phase change, the enclosure underwent independent heating and cooling pro...
An equivalent self-adjusted heat capacity method for modelling heat diffusion p...
Soares, Nelson; Rosa, Nuno; Matias, Telma; Lopes, António Gameiro; Simões, Pedro Nuno; Durães, Luísa; Costa, José JoaquimThis work evaluates the thermal behaviour of a small aluminium-container-based thermal energy storage (TES) unit filled with a microencapsulated phase change material (PCM) – Micronal® DS 5001 X. ANSYS CFX® software is used for the 3D numerical simulations, which are based on the Effective Heat Capacity (EHC) method considering a purely diffusive transient model. In the formulation, a new artificial self-adjust...
Temperature regulation of polycrystalline silicon photovoltaic panels with mova...
Soares, Nelson; Gaspar, Adélio Rodrigues; Matias, Telma; Lopes, António Gameiro; Simões, Pedro Nuno; Durães, Luísa; Costa, José JoaquimThis paper presents an experimental study to evaluate the improvement of photovoltaic (PV) performance through temperature regulation of a commercial polycrystalline silicon PV panel, by placing a movable thermal energy storage (TES) unit filled with a free-form commercial paraffin-based PCM (RT22HC) on the panel's back. The outdoor apparatus is located in Coimbra, Portugal (40.19N, 8.42W). Three identical PV p...