13 documents found, page 1 of 2
Enhancing efficiency in solar non-intrusive desalination: solar still prototype...
Pacheco, André; Sequeira, Claudia; Silva, Manuela Fernanda Gomes Moreira da; Serrão Sousa, VâniaAccess to freshwater is a pressing global challenge. Despite being irreplaceable freshwater is an increasingly scarce resource, especially in regions as Southern Europe, due to high human pressure and climate change. Solar desalination presents a low impact solution to produce freshwater from seawater, particularly in sun-rich regions. The main goal of this study was to develop a modular solar desalination syst...
On a new method to design solar photovoltaic systems in renewable energy commun...
Ewart, M.; Santos, J.; Pacheco, A.; Monteiro, Jânio; Sequeira, ClaudiaIslands must reach sustainable lifestyles by improving resources management and by getting accustomed to renewable energy sources. Culatra, a small Portuguese island, is actively increasing renewable energy penetration into local processes in order to be the first 100% sustainable Portuguese territory by 2030. Based on the electric consumption of Culatra, the objective of the present study is to project a photo...
Energy transition process and community engagement on geographic islands: the c...
Pacheco, André; Monteiro, Jânio; Santos, Joni; Sequeira, Claudia; Nunes, J.Islands have the potential to be precursors in the transition to clean energy, by adopting new technologies and applying innovative solutions that can serve as showcases at an international level. This paper is a contribution towards understating the importance of community engagement on energy transition processes. It covers multiple aspects of a green transition process, including technical, environmental, so...
Energias limpas na Ria Formosa, o caminho da sustentabilidade
Pacheco, André; González-Gorbeña Eisenmann, Eduardo; Sequeira, ClaudiaO crescimento económico e populacional está entre os fatores mais importantes para o aumento do consumo energético mundial. Atualmente, a forma de energia que o Homem mais utiliza é a energia química (cerca de 80%), nomeadamente, combustíveis fósseis, como o petróleo, o carvão e o gás natural. No entanto, essas fontes são muito poluentes, pois a sua utilização é responsável pela emissão de substâncias nocivas p...
Baseline assessment of underwater noise in the Ria Formosa
Soares, C; Pacheco, André; Zabel, Friedrich; G-Gorbeña, Eduardo; Sequeira, ClaudiaThe Ria Formosa is a sheltered large coastal lagoon located on the Atlantic South Coast of Portugal, that has been classified as a natural park since 1987. The lagoon hosts a diverse and abundant fish community and other species of commercial importance. Several economical activities are supported by shipping, and as such, vessel traffic within the Ria Formosa lagoon is very intense at some locations during par...
Marine energy prototype testing at Ria Formosa
Pacheco, André; Gorbeña, Eduardo; Sequeira, ClaudiaEconomic growth and increasing human demands are among the most important factors for growing world energy consumption. Energy is present in everything around us: it is a property of all objects and is essential to life. We find various forms of energy in the world around us. When plants grow, for example, they are converting sunlight energy into chemical energy in the form of carbohydrates and other compounds ...
Analysis of the efficiency of wind turbine gearboxes using the temperature vari...
Sequeira, Claudia; Pacheco, André; Galego, P.; González-Gorbeña Eisenmann, EduardoThe aim of this paper is to evaluate how lubricant selection affects gearbox efficiency and overall energy production by analysing real data from wind farms, monitored and controlled by a Supervisory Control and Data Acquisition (SCADA system). The turbines analysed worked with two or more oil types for the same amount of hours, which allowed to establish relations between the active power curves and wind veloc...
Surrogate-based optimization of tidal turbine arrays: a case study for the Faro...
G-Gorbeña, Eduardo; Pacheco, André; Plomaritis, Theocharis; Ferreira, Oscar; Sequeira, Claudia; Moura, TheoThis paper presents a study for estimating the size of a tidal turbine array for the Faro-Olhão Inlet (Potugal) using a surrogate optimization approach. The method compromises problem formulation, hydro-morphodynamic modelling, surrogate construction and validation, and constraint optimization. A total of 26 surrogates were built using linear RBFs as a function of two design variables: number of rows in the arr...
Deployment characterization of a floatable tidal energy converter on a tidal ch...
Pacheco, André; G-Gorbeña, Eduardo; Plomaritis, Haris; Garel, Erwan; Gonçalves, J. M. S.; Bentes, L.; Monteiro, P.; Afonso, Carlos; Oliveira, FredericoThis paper presents the results of a pilot experiment with an existing tidal energy converter (TEC), Evopod 1 kW floatable prototype, in a real test case scenario (Faro Channel, Ria Formosa, Portugal). A baseline marine geophysical, hydrodynamic and ecological study based on the experience collected on the test site is presented. The collected data was used to validate a hydro-morphodynamic model, allowing the ...
Estimating the optimum size of a tidal array at a multi-inlet system considerin...
González-Gorbeña Eisenmann, Eduardo; Pacheco, André; Plomaritis, Theocharis; Ferreira, Oscar; Sequeira, ClaudiaThis paper investigates the optimum tidal energy converter array density at a tidal inlet by applying surrogate-based optimisation. The SBO procedure comprises problem formulation, design of experiments, numerical simulations, surrogate model construction and constrained optimisation. This study presents an example for the Faro-Olhão Inlet in the Ria Formosa (Portugal), a potential site for tidal in-stream ener...