6 documents found, page 1 of 1
Detection of corrosion on silvered glass reflectors via image processing
Wiesinger, Florian; Baghouil, Sarah; Le Baron, Estelle; Collignon, Romain; Santos, Filipa; Cunha Diamantino, Teresa; Catarino, Isabel; Facão, JorgeABSTRACT: A novel characterization technique based on image analysis is presented, intended to complement state-of-the-art reflectometer measurements. The technique is developed by experts from different laboratories (OPAC, AGC, CEA and LNEG), which subsequently conduct two Round Robin experiments on corroded solar reflectors for validation. Regarding the inter-comparability, it is found that parameters like th...
Hybrid Variable Renewable Power Plants: A Case Study of ROR Hydro Arbitrage
Catarino, Isabel; Romão, Inês; Estanqueiro, AnaABSTRACT: Wind and solar energy sources, while sustainable, are inherently variable in their power generation, posing challenges to grid stability due to their non-dispatchable nature. To address this issue, this study explores the synergistic optimization of wind and solar photovoltaic resources to mitigate power output variability, reducing the strain on local grids and lessening the reliance on balancing pow...
40 K Liquid Neon Energy Storage Unit
Bonfait, Gregoire; Martins, Daniel; Borges de Sousa, Patrícia; Catarino, IsabelA thermal Energy Storage Unit (ESU) could be used to attenuate inherent temperature fluctuations of a cold finger, either from a cryocooler working or due to sudden income heat bursts. An ESU directly coupled to the cold source acts as a thermal buffer temporarily increasing its cooling capacity and providing a better thermal stability of the cold finger (“Power Booster mode”). The energy storage units presente...
Building a thinner gap in a gas-gap heat switch
Franco, João; Galinhas, Bruno; Martins, Daniel; Sousa, Patrícia Borges de; Catarino, Isabel; Bonfait, Gregoire25th International Cryogenic Engineering Conference and the International Cryogenic Materials Conference in 2014, ICEC 25–ICMC 2014; A gas-gap heat switch (GGHS) reaches its highest conductance state when the gap between two exchange surfaces is filled with a conducting gas in a viscous regime. The broader the surface and the thinner the gap, the higher the ON conductance achieved. In this paper we describe a v...
Evaluation of the Reasons Underlying Drop-Out and Identification of Predictive ...
Teixeira, Pedro; Saavedra, Isabel; Rodrigues, Tiago; Brenha, M Miguel; Moreira, Susana; Catarino, Isabel; Mendes, PatríciaIntroduction/Objectives: The evaluation of psychiatric interventions results should be multidimensional, including clinical and socialvariables, such as individual experience of the mentally ill. The patient satisfaction with care has been recognized as an importantvariable, despite not being the main objective of the service or of the psychiatrist. However, if the user’s perspective is not included,there´s a r...
Assessment of saccharide fractionation by ultrafiltration and nanofiltration
Catarino, Isabel; Minhalma, Miguel; Beal, Lademir L.; Mateus, Marília; Pinho, Maria Norberta deThis paper addresses the investigation of the fractionation of saccharide mixtures and saccharide mixtures with calcium using ultrafiltration (UF) and nanofiltration (NF). A set of cellulose acetate membranes covered a wide range of molecular weight cut-off (MWCO) ranging from 250 to 46,000 Da and the total feed concentration of saccharides mixtures varied from 1550 to 4700 ppm with the ratio of the two sacchar...