International Journal of Energy and Environment


ISSN: 2308-1007
Volume 13, 2019

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of NAUN Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

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Volume 13, 2019


Title of the Paper: Numerical Study of based Perovskite Solar Cells by SCAPS-1D

 

Authors: Abdelhadi Slami, Mama Bouchaour, Laarej Merad

Pages: 17-21

Abstract: This work deals with the design and analysis of lead-based Perovskite solar cells. The architecture consists of Glass/TCO/Buffer layer (TiO2)/CH3NH3PbI3/Spiro-MeTAD/metal back contact (Aluminium). To study the efficiency and the performances of this solar cell, SCAPS-1D software is used in the simulation. The influence of defect density, absorber layer thickness, and working temperature on the performance of the device is presented. The optimized PCS is obtained for the absorber layer thickness of 900 nm, the defect density of 1013 cm-3 and the 300K operating temperature. The efficiency greater than 30% is obtained.


Title of the Paper: Influence of Doping and Thickness on the Performance of CIGS PV Cell

 

Authors: M. Bouchaour, L. Merad, A. Ould-abbas, N. E. Chabane Sari

Pages: 13-16

Abstract: The most important aim of Photovoltaic (PV) manufacturers is to reduce the price of solar cells and increase their efficiencies above the Shockley Queisser limit. Back in the day, thin film technologies like CdTe, CIGS, etc. looked promising and started gaining meaningful market share. In this work, a numerical study of thin film CIGS based PV cells with Solar Cell Capacitance Simulator software (SCAPS) is reported. The influence of thickness and doping concentration on PV parameters (Jsc, η, Voc and FF) under standard illumination is investigated. The analysis of the outputs of the SCAPS model provides a better understanding of thin film PV solar cells. The incorporation of certain impurities into CIGS solar cells can enhance spectral response, short circuit current density and conversion efficiency only under some conditions.


Title of the Paper: The Impact of a Ring Road in an Urban Road Network. The Case Study of Guimarães, Portugal

 

Authors: Paulo J. G. Ribeiro, Luís A. P. J. Gonçalves

Pages: 7-12

Abstract: The high traffic volumes are a main source of the congestion in Cities, they are a big problem on urban road transportation systems. This congestion is the main cause of the increase of level of noise and air pollution in urban centers which directly affects the quality of life of the population. Also, contributing to the big number of vehicle conflicts that affects the performance of the urban road transportation systems and the quality of life of the population. These problems are the result of the high volumes of the through traffic. Therefore, to reduce the traffic volume in urban center of Guimarães, Portugal we studied a possible conclusion of the ring road, on the slope of the Penha hill for the peak hour of the morning. To carry out our study was estimated the Origin – Destination Matrix for peak hour from the data of traffic counts. Concluding the traffic volume in the section of the ring road already built there was a reduction. However, in the city center there were no major variations of the traffic volume.


Title of the Paper: Analysis of Road Safety Conflicts. The Case Study of a Road Interchange in Guimarães, PT

 

Authors: Carlos Miguel Cardoso Araújo, Paulo J. G. Ribeiro, Flávio José Craveiro Cunto

Pages: 1-6

Abstract: This paper presents a case study to identify road safety conflicts in an interchange of the road network of the city of Guimarães, Portugal. For that an analysis using the SSAM (Surrogate safety assessment model) software was performed in order to identified and characterized the network points of conflict according their category and severity. To analyze traffic conflicts vehicles routes must be collected and inserted in SSAM software. To obtain vehicle routes a microsimulation traffic modelling was performed through the usage of PTV VISSIM software. Thus, a traffic and geometric data collection was done for the peak hour in the morning, and then the model was calibrated and validated using traffic volumes, travel time and queuing length using specific sections of the interchange. In addition, to identify and analyze three types of conflicts (rear end, lane change and crossings) with SSAM were evaluated two parameters the TTC (Time to Collision) and the PET (After Invasion Time) for all the vehicles, using their routes extracted from VISSIM. The location of the conflicts was analyzed in a GIS, which allowed the creation of maps of conflicts. The results shown that the most frequent conflicts are the rear end conflicts (1174), which occurs a little throughout the entire interchange and are more frequently in the entrances and exits of the freeway, which was also verified for lane change conflicts (107), but in a lower frequency. Based on these results it was also possible to conclude that the high number of conflicts should be a matter of concern for transport authorities, who may have to adopt measures to improve safety and reduce the potential for accidents, which may imply a reduction of speed in this interchange or a police reinforcement.