15 research outputs found
Impurity photovoltaic effect in silicon solar cell doped with sulphur: A numerical simulation
No full textSeasonal Variations of Solar Radiation on the Performance of Crystalline Silicon Heterojunction (c-Si-HJ) Solar Cells
No full textSolar Cells Electrical Behavior under Thermal Gradient
No full textAbstractThis work presents an investigation on the electrical behavior and performances of solar cells under thermal gradient. For constant illumination, the main effect of temperature gradient is the decreasing of the conversion efficiency of solar cells. A slope of 0.063%/K is observed for the considered silicon solar cell. The obtained results show also that the maximum value of photovoltaic conversion efficiency is below room temperature, a comparative study with other technologies shows that the silicon technology is less recommended in hot environments
Air Mass Effect on the Performance of Organic Solar Cells
No full textAbstractThe objective of this study is to evaluate the effect of variations in global and diffuse solar spectral distribution due to the variation of air mass on the performance of two types of solar cells, DPB (etraphenyl–dibenzo–periflanthene) and CuPc (Copper-Phthalocyanine) using the spectral irradiance model for clear skies, SMARTS2, over typical rural environment in Setif. Air mass can reduce the sunlight reaching a solar cell and thereby cause a reduction in the electrical current, fill factor, open circuit voltage and efficiency. The results indicate that this atmospheric parameter causes different effects on the electrical current produced by DPB and CuPc solar cells. In addition, air mass reduces the current of the DPB and CuPc cells by 82.34% and 83.07% respectively under global radiation. However these reductions are 37.85% and 38.06%, for DPB and CuPc cells respectively under diffuse solar radiation. The efficiency decreases with increasing air mass for both DPB and CuPc solar cells
Environmental Effects on the Performance of Nanocrystalline Silicon Solar Cells
No full textAbstractIn this paper the global, direct and diffuse solar radiation incident on solar cells is simulated using the spectral model SMARTS2, for varying environmental conditions on the site of Setif. The effect of changes in total intensity and spectral distribution on the short circuit current and efficiency of nanocrystalline silicon (nc-Si: H) is examined. The results show a reduction in the short circuit current due to increasing turbidity. It is 27.06% and 67.97% under global and direct radiation respectively. However it increases under diffuse radiation. This increase is about 53.97%. Increasing albedo leads to an increase in the short circuit current of 5.70% and 27.05% for global and diffuse solar radiation, respectively and it is not influenced under direct solar radiation. The performance of the cells is notably reduced, both in terms of efficiency and open circuit voltage, with increasing air mass. It is about 81.86%, 37.47% and 94.18% for global, diffuse and direct solar radiation respectively
Automatisation de la commande par L’API "Siemens S7-300" du compresseur à gaz "K-401" de la région "Haoud Berkaoui"
No full text60 p. : ill. ; 30 cmNotre travail est reparti en quatre chapitres: Dans le premier chapitre, nous aborderons la présentation de la région "Haoud Berkaoui", centre de production "Guellala"; le deuxième chapitre, on va présenter le compresseur "K-401" ainsi que les différents instruments qui sont indisponible pour son bon fonctionnement. Le troisième chapitre, sera consacré à la description de l’API et des outils de programmation "STEP 7", "Win CC" pour élaborer un programme pour l’acquisition des donnes, leurs traitements et une interface "Homme/machine". Le dernier chapitre, on va élaborer un programme pour l’API par "STEP 7" et configurer les pupitres "SIMATIC HMI panels" pour la supervision sous "Win CC"
Environmental effects on the performance of nanocrystalline silicon solar cells
No full textInternational audienc
Solar Cells Parameters Evaluation from Dark I-V Characteristics
No full textAbstractIn this paper, a comparative analysis of three methods to determine the four solar cells parameters (the saturation current (Is), the series resistance (Rs), the ideality factor (n), and the shunt conductance (Gsh)) of the single diode lumped model from its dark curve is presented. These methods are based on Gromov, Werner, and Mikhelashviliet al. methods that were used to extract the Schottky diode parameters. These techniques have been adequately modified, extended to cover the case of solar cells and used to extract the parameters of interest from experimental I-V characteristic of a Poly-Si solar cell under dark condition
Contribution to the evaluation of the illuminated solar cells parameter
No full textInternational audienc
