8 documents found, page 1 of 1
Can movable PCM-filled TES units be used to improve the performance of PV panel...
Soares, N.; Costa, J. J.; Gaspar, A. R.; Matias, T.; Simões, Pedro Nuno; Durães, L.
Thermophysical characterization of commercial paraffin-based PCMs for low tempe...
Matias, T.; Soares, N.; Campos-Gonçalves, I.; Costa, J.J.; Simões, P. N.; Durães, L.Reliable data on the thermophysical properties of commercial Phase Change Materials (PCMs) is fundamental for the design and modelling of low temperature Thermal Energy Storage (TES) applications. However, data provided by manufacturers is often insufficient and uncertain. In this work, an experimental study was conducted to determine the relevant thermophysical properties of some commercial paraffin-based PCMs...
The importance of the thermophysical characterization of microencapsulated PCMs...
Soares, N.; Luzio, A.; Matias, T.; Simões, P. N.; Durães, L.; Costa, J.J.This work presents the development of two-dimensional numerical models based on the “additional heat source” and the “effective heat capacity” methods to simulate the thermal behaviour of a microencapsulated phase change material (PCM) - Micronal® DS 5001 X. A purely diffusive, transient model was used, where conduction is the only heat transfer mechanism during phase change. Different ways are evaluated to spe...
Systems with PCM-filled rectangular cavities for the storage of solar thermal e...
Soares, N.; Lopes, A. G.; Gonçalves, M.; Gaspar, A. R.; Martins, C.; Matias, T.; Santos, P.; Simões, P. N.; Durães, L.; Costa, J. J.This paper provides an overview of the ongoing research project "PCMs4Buildings - Systems with PCM-filled rectangular cavities for the storage of solar thermal energy for buildings". The main goal of this project is to develop a holistic approach for the experimental and numerical evaluation of the thermal behaviour of new thermal energy storage (TES) systems with rectangular cavities filled with phase change m...
Apresentação do projeto PCMs4Buildings
Soares, N.; Lopes, A. G.; Gaspar, A. R.; Martins, C.; Durães, L.; Gonçalves, M.; Santos, P.; Simões, P. N.; Matias, T.; Costa, J.J.
Apresentação do projeto PCMs4Buildings - Sistemas com cavidades retangulares co...
Soares, N.; Lopes, A.G.; Gaspar, A. R.; Durães, L.; Gonçalves, M.; Santos, P.; Simões, P. N.; Matias, T.; Costa, J.J.
Truncated tetragonal bipyramidal anatase nanocrystals formed without use of cap...
Tobaldi, D. M.; Pullar, R. C.; Duraes, L.; Matias, T.; Seabra, M. P.; Labrincha, J. A.Titanium dioxide (TiO2) nanoparticles are extremely attractive materials for numerous applications, especially in the anatase form. We have made these shaped, <10 nm anatase nanoparticles (NPs) via the super-critical (SC) drying of a titania sol, made by a \"green\" aqueous sol-gel nanosynthesis route. The SC drying was carried out in alcohol at 255-260 degrees C, and no further heating or processing of the NPs...
Silica based aerogel-like materials obtained by quick microwave drying
Durães, L.; Matias, T.; Patrício, R.; Portugal, A.