JFAS_Vol 03 N 01

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Browsing JFAS_Vol 03 N 01 by Author "Ferouani, A. M."

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    Numerical Simulation And Optimization Of Performances Of A Solar Cell Based On Cdte
    (University of Eloued جامعة الوادي, 2011-01-01) Ferouani, A. M.; Merad Boudia, M. R.; Rahmoun, K.
    This article has as an aim the study and the simulation of the photovoltaic cells containing CdTe materials, contributing to the development of renewable energies, and able to feed from the houses, the shelters as well as photovoltaic stations… etc. CdTe is a semiconductor having a structure of bands with an indirect gap of a value of 1,5 eV at ambient temperature what means that photon wavelength of approximately 1200 nm will be able to generate an electron-hole pair. One speaks about photogeneration. We will lay the stress, initially, on the essential design features of a photovoltaic module (the open-circuit tension, the short-circuit current, the fill factor, and the output of the cell), our results was simulated with the SCAPS computer code in one dimension which uses electrical characteristics DC and AC of the thin layers heterojunctions. The results obtained after optimization are: VCO = 0.632V, Jsc = 39.1 mA/cm2, FF=82.98 % and the output energy of conversion is 18.26%.Optimization is made according to the temperature and the wavelength.
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    Simulation Of Thermo-elastics Properties Of Thermal Barrier Coatings
    (University of Eloued جامعة الوادي, 2011-01-01) Ferouani, A. M.; Faraoun, H. I.; Aourag, H.
    Thermal barrier coatings are used to protect different parts in compressors and turbines from heat. They are generally composed of two layers, one metallic layer providing resistance to heat corrosion and oxidation, and one thermally insulating ceramic layer. Two different techniques are industrially used. Plasma spray results in a lamellar structure granting a low thermal conductivity, but with a low thermal expansion compliance. Electron Beam Physical Vapour Deposition generates a columnar structure allowing a better accommodation of the thermal expansion stresses, entailing improved lifetime of the coating, but with a higher thermal conductivity. The aim of the paper presented here is to develop a procedure of analysis based on the micro structural observation for the prediction of the properties of new coatings in court of industrial development and to predict the effect of the posterior thermal treatment on the properties of the coatings carried out. For a given coating, one has to calculate linear elasticity and its evolution with the temperature as well as thermal expansion, aiming at predicting different parameters related to the in service deterioration.
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    Study Ofperformances Of Organic Solar Cellsbyanalysis Of Main Components
    (University of Eloued جامعة الوادي, 2011-01-01) Merad Boudia, M. R.; Ferouani, A. M.; Cheknane, A.; Benyoucef, B.
    The analysis of the data is currently, in the statisticians, the object of a true phenomenon of mode, characterized at the same time by the passion and the rejection.To determine the characteristics of a whole of data are obviously not an end in itself, but this lapse of memory is unfortunate because the type of data available always influences the direction of research.The factorial analysis in normalized principal components (PCA), is particularly adapted to the reduction of tables of measurements, where one generally works on a matrix of correlation between characters.In this article we will report our results of analysis of performances of organic solar cellsby using what one call the datamining materials.All information was presented in the tables envisaged by an ACP method of the studied semiconductors.Factorial analyzes substitutes for primitive measurements of new variables or factors (which are linear combinations of the primitive variables) with the help of which it is thus possible to optimize the visualization of the data in a restricted number of figures. Large at the modo we present, the results related to the development of new approaches of Datamining, Analysis in principal components (ACP), of the data-processing techniques which were applied to organic semiconductors and combined with metals to predict new materials or best performing coatings.
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    Temperatureeffect Ofelectricalproperties Of Cigs Solar
    (University of Eloued جامعة الوادي, 2011-01-01) Ferouani, A. M.; Merad Boudia, M. R; Cheknane, A.; Benyoucef, B.
    In this paper we are interested in studying the copper–indium–gallium–selenium (CIGS) solar cells sandwiched between cadmium sulfide (CdS) and ZnO as buffer layers, and Molybdenum (Mo). Thus, we report our simulation results using the capacitance simulator (SCAPS) in terms of layer thickness, absorber layer band gap and operating temperature to find out the optimum choice. An efficiency of 20.61% (with Voc of 635.2mV, Jsc of 44.08 mA/cm2 and fill factor of 0.73) has been achieved with CdS used as buffer layer as the reference case. It is also found that the high efficiency CIGS cells with the low temperature were a very high efficiency conversion.