• Feasibility Study for a Hybrid Power Plant (PV-Wind-Diesel-Storage) Connected to the Electricity Grid
  • Abstract In this work, we present a feasibility study for a new hybrid power plant (PV-Wind-Diesel-Storage) directly connected to the electrical grid. Several simulations are performed to verify the performance of the hybrid system under different scenarios using real meteorological data. It is shown that the performances of the hybrid system connected to the electrical network depend obviously on the available energy resources and constraints because the renewable energies are intermittent. In addition, the price of the kWh of electricity supplied by the hybrid system is determined, which amounts to $0.209/kWh, which is very cost effective and satisfactory for the considered… More
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  • Elaboration of a Road Material Based on Clayey Soil and Crushed Sand
  • Abstract To contribute to the enhancement of unconventional local materials used for road construction, this study characterizes a crushed sand 0/5, a clayey soil and the litho-stabilized material without and with hydraulic binder and determines their use in accordance with some reference specifications (CEBTP 1984). It is shown that the different components are not usable alone in pavement base. Indeed, the plasticity index obtained for the clayey soil is 21%, a value higher than the imposed standards. In addition, the grading of the 0/5 crushed sand does not fit into the range proposed by CEBTP. A combination of these two (02)… More
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  • Turbulent Double-Diffusive Natural Convection and Entropy Generation within an Inclined Square Cavity
  • Abstract The present study deals with double-diffusive convection within a two-dimensional inclined cavity filled with an air-CO2 binary gas mixture. The left and the right vertical walls are differentially heated and subjected to different locations of (CO2) contaminants to allow for the variation of the buoyancy strength (N). However, the horizontal walls are assumed adiabatic. The simulations are conducted using the finite volume method to solve the conservation equations of continuity, momentum, energy, and species transport. Good agreement with other numerical results in the literature is obtained. The effect of multiple parameters, namely, buoyancy ratio (N), thermal Rayleigh number (Ra), and… More
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  • Characterization of the Omni-Processor Sewage Sludge Ash for Reuse as Construction Material
  • Abstract Omni Processors (OP) are machines which use sludge as a fuel to generate electricity and clean water, but create ash at the same time. In the present study, fly ash and bottom ash are investigated as materials for potential reuse in the construction field. First, the granular size, density and Blaine finesse are determined. Then, the chemical composition and microstructure are obtained by means of X-ray fluorescence and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS), respectively. Finally, ashes reactivity is determined by two chemical methods (modified Chapelle test, bound water content R3) and a mechanical method (pozzolanic activity index). The characterization… More
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  • Comparative Analysis of the Measured and Simulated Performances of a Grid-Connected Photovoltaic Power Plant
  • Abstract The present study comparing actual data and simulated parameters was carried out using the PVsyst software for a 5.94 KWp grid-connected photovoltaic system, consisting of three types of mono-Si (2.04 KWp), poly-Si (2.04 KWp) and amorphous-Si (1.86 KWp) photovoltaic panels and a weather station. The research is based on data collected for one year (2020) of energy production Simulations were performed using long-term meteorological data generated by NASA and on-site measurement. A comparison of evaluated monthly and annually performance elements has also been considered: Eac, PR, FC. As shown by the results, each photovoltaic technology has certain advantages in different… More
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  • Performance Enhancement of Dye-Sensitized Solar Cells: Solvation Model
  • Abstract Merocyanine 540-based dye has been successfully used in n-type dye-sensitized solar cells for the first time. Given the need to better understand the behavior of the dye adsorbed on the TiO2 electrode, we report results of time-dependent density-functional theory (TD-DFT) studies of Merocyanine 540-based dye in different solvents. The highest absorption peaks were recorded at 489 and 493 nm in Water and Ethanol solvent, Vs. the Vacuum phase which yielded 495 nm, leading to a modest electron injection-free energy value (ΔGinj) of −2.34 eV for both Water and Ethanol solvents. We provide the electronic structure and simulated UV-Vis spectra of the Merocyanine 540 dye… More
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