8 documents found, page 1 of 1
Pirólise de agulhas de pinheiro: resultados preliminares
Nascimento, M.; Silva, F.; Pilão, R.; Neto, M.P.; Ribeiro, A.M.(Introdução) As florestas em Portugal ocupam uma área aproximada de 3 224 200 ha, apresentando como espécies predominantes o sobreiro, o pinheiro e o eucalipto (ICNF, 2021). Os pinheiros ocupam cerca de 28 % desta área e geram diversos resíduos, entre os quais as agulhas, que se não forem retiradas das florestas podem agravar o problema dos incêndios florestais (Omvesh et al., 2023). A energia proveniente de re...
Validation of a methodology for post-construction Energy Yield Assessment of an...
Costa, M.; Rocha, T.; Mendonça, J.; Pilão, R.; Pinto, P.The uncertainty associated with the prospective Energy Yield Assessment (EYA) of a wind farm may be reduced by re estimating the energy yield after it enters normal operation. This study aims to validate a simple methodology for conducting post-construction EYA of an operational wind farm. The proposed methodology derives a linear relationship between a historical source of wind speed data and the observed wind...
Evaluation of MCP correlation algorithms applied to wind data series
Moreira, A.; Rocha, T.; Mendonça, J.; Pilão, R.; Pinto, P.(Objectives) This work aimed to develop methodologies for analyzing statistical correlations among wind data series using various Measure-Correlate-Predict (MCP) methods, with the goal of selecting the most suitable method for extrapolating long-term data with minimal associated uncertainty. Furthermore, the study intends to investigate how the concurrent period used to build the correlation can affect the perf...
Evaluation of MCP Correlation Algorithms Applied to Wind Data Series
Moreira, A.; Rocha, T.; Mendonça, J.; Pilão, R.; Pinto, P.This work aimed to develop methodologies for analysing statistical correlations among wind data series using various Measure-Correlate-Predict (MCP) methods, with the goal of selecting the most suitable method for extrapolating long-term data with minimal associated uncertainty. It was analysed the minimum time required for a wind measurement campaign when applying this methodology. Fifteen local wind measureme...
Gasification of animal fat using dolomite as particle bed in a downdraft fixed ...
Pilão, R.; Araujo, A.L.; Silva, F.T.; Ribeiro, A.M.; Campos, J.B.L.M.One of the wastes generated in the tanning industry is hide fleshings, which contains 40% of animal fat, currently being deposited in landfills. The objective of this work was to study the catalytic capacity of dolomite in the gasification of this waste. The tests were carried out in a downflow fixed bed reactor using steam as gasification agent and used as bed of particles, alumina, dolomite and a mixture of t...
Valorisation of Leather Wastes from the Footwear Industry via Pyrolysis: Produc...
Silva, F.; Direito, D.; Pilão, R.; Ribeiro, A.M.; Silva, Felipe; Direito, Daniel; Pilão, Rosa Maria; Ribeiro, AlbinaThe footwear industry, although contributing positively to the Portuguese economy, generates a lot of residues including chromium tanned leather wastes. This study presents results on the slow pyrolysis of these residues at particle sizes between 5 and 6.3 mm and temperatures inside the reactor ranging from 444 to 875 °C. For this range of temperatures, char yield decreased from 36.2 to 28.1% and gas yield incr...
Valorisation of leather wastes from footwear industry via pyrolysis: Product yi...
Silva, F.; Direito, D.; Pilão, R.; Ribeiro, A.M.(Objectives) The influence of temperature on the pyrolysis of leather trimmings from the footwear industry; Characterization of leather waste used in the pyrolysis process; The physical-chemical characterizations of biochar, bio-oil and non-condensable gases.
Representative period of measurements for wind regime characterization in Dobro...
Pilão, R.; Pinto, P.; Guedes, R.The proposed work aims to characterize the inter-annual variability of the mean wind speed for the Dobrogea region of Romania in order to determine the minimum local wind measurements period for its wind regime characterization. To achieve this, wind data from local wind measurements at meteorological stations in operation over the past 6 years and installed in different sites of the region were analyzed. In a ...