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Radiação Solar: Estudo e criação de plataforma de apoio a conceção de um sensor...
Albino, André; Salgado, Rui; Tlemçani, Mouhaydine; Bortoli, Daniele; Joyce, AntónioEste trabalho introduz a teoria da instrumentação virtual descrevendo os principais componentes desta. É detalhada a implementação de um instrumento virtual e uma base de dados associada que permitem obter uma estimativa de variáveis ambientais para qualquer ponto do globo e qualquer altura do ano. Este instrumento - Environment simulator – permite fornecer dados ambientais necessários a simulação da radiação s...
Comparison of Photovoltaic panel’s standard and simplified models
Rashel, Masud Rana; Albino, André; Viega, Angela; Ahmed, Md Tofael; Tlemçani, Mouhaydine; Gonçalves, TeresaShockley diode equation is basic for single diode model equation, which is overly used for characterizing the photovoltaic cell output and behavior. In the standard equation, it includes series resistance (Rs) and shunt resistance (Rsh) with different types of parameters. Maximum simulation and modeling work done previously, related to single diode photovoltaic cell used this equation. However, there is another...
Different Parameters Variation Analysis of a PV Cell
Ahmed, Md Tofael; Gonçalves, Teresa; Albino, André; Rashel, Masud Rana; Veiga, Angela; Tlemçani, MouhaydineThe paper states an introduction, description and implementation of a PV cell under the variation of parameters. Analysis and observation of a different parameters variation of a PV cell are discussed here. To obtain the model for the purpose of analyzing an equivalent circuit with the consisting parameters a photo current source, a series resistor, a shunt resistor and a diode is used. The fundamental equation...
Sensitivity analysis of parameters of a photovoltaic cell under different condi...
Rashel, Masud; Albino, André; Gonçalves, Teresa; Tlemçani, MouhaydineA photovoltaic cell is a component which converts light energy into electrical energy. Different environmental parameters and internal parameters have a great impact on the output of the photovoltaic cell. To identify its characteristics and estimate the output, the well known Shockley diode equation is used. This equation contains all the parameters, as one environmental and different internal. The properties ...
Matlab simulink modeling of photovoltaic cells for understanding shadow effect
Rashel, Masud; Albino, André; Gonçalves, Teresa; Tlemçani, MouhaydineIrradiation is the main component for producing the electricity from solar energy. When obstacles come in between the sun and the PV cell then it doesn’t get sufficient irradiance to produce enough electricity. Shadowing has a great impact on photovoltaic cell. The main fuel of PV cell is solar radiation. Using solar radiation, a photovoltaic cell produces electricity. The shadow on a PV cell decreases the outp...
Interactions lake-atmosphere: The ALEX 2014 field campaign and numerical simula...
Salgado, Rui; Potes, Miguel; Albino, André; Apolinário, João; Barbosa, Susana; Bárias, Samuel; Beliche, Paulo; Bortoli, Daniel; Canhoto, PauloThe ALqueva hydro-meteorological EXperiment, ALEX 2014, was an integrated field campaign with measurements of chemical, physical and biological parameters in water and air at different experimental sites in the region of the Alqueva reservoir, a 250 km2 man made lake, in the southeast of Portugal. The Field campaign took place from June 1 to September 30, 2014 and comprises an Intensive Observation Period (IOP)...
ALEX2014: The Alqueva Hydro-Meteorological Experiment
Salgado, Rui; Potes, Miguel; Albino, André; Apolinário, João; Barbosa, Susana; Bárias, Samuel; Beliche, Paulo; Bortoli, Daniel; Canhoto, PauloDuring the four months of the ALEX 2014, the over water fluxes of momentum, heat and mass (H2O and CO2) were obtained with an integrated Open-Path CO2 /H2O Gas Analyser and 3D Sonic Anemometer, mounted on a floating platform (Fig.1) belonging to the Portuguese Environment Agency. The short and long wave, up and down, radiative fluxes were measured at the same place, as well as the water temperature profile. Eig...
Modelling and studies of the spectral response of some optoelectronic components
Albino, André; Bortoli, Daniele; Tlemçani, Mouhaydine; Joyce, AntónioSolar radiation takes in today's world, an increasing importance. Different devices are used to carry out spectral and integrated measurements of solar radiation. Thus the sensors can be divided into the fallow types: Calorimetric, Thermomechanical, Thermoelectric and Photoelectric. The first three categories are based on components converting the radiation to temperature (or heat) and then into electrical quan...