Entity

Time filter

Source Type

Ajaccio, France

Diaf S.,Renewable Energy Development Center Algeria | Notton G.,CNRS Environmental Sciences
Renewable and Sustainable Energy Reviews | Year: 2013

This paper presents the wind energy potential and economic analysis in five selected locations in the southern region of Algeria using wind speed data collected over a period of twelve years. The technical and economic evaluations of electricity generation from four commercial wind turbine models used for electricity generation located in these sites are examined. The wind speed data analysis shows that the sites located in the southern region of Algeria, except Tamanrasset, have a good wind potential for the wind energy development. The highest potential wind power was found at Adrar, with 88% of the time the wind speed is above 3 m/s. The yearly energy output, the capacity factor and the wind energy cost per unit of electricity generated by the selected wind turbines are calculated. In terms of energy production, the results show that Adrar is the best location for harnessing the wind power to generate electricity. The maximum energy output of 9429.8 MW h is found for Fuhrlander FL 2500 wind machine at Adrar. The capacity factor values are found to vary from a minimum of 13% at Tamanrasset and a maximum of 48% in Adrar. In addition, the results show that the minimum cost per kW h of electricity generated is found to be 0.01204 $/kW h for Suzlon S82/1.5MW wind turbine in Adrar, while the maximum value reaches 0.0923 $/kW h for the Fuhrlander FL 2500/901 in Tamanrasset. Among all the considered models, the Suzlon S82/1.5MW wind turbine is found to be the most attractive in terms of the cost per kW h. According to the obtained results, the wind resource appears to be suitable for power production in the southern region, which makes it a viable substitute to diesel oil for electricity generation. © 2013 Elsevier Ltd. Source


Diaf S.,Renewable Energy Development Center Algeria | Notton G.,CNRS Environmental Sciences
Renewable and Sustainable Energy Reviews | Year: 2013

In this study, the wind energy potential and economic analysis in 13 locations are investigated using wind speed data measured at 10 m height. From the collected data which are the daily, monthly and frequency profiles of the wind speed at these sites, the southern region of Algeria is found to have the relatively highest wind potential. Technical and economic evaluations of electricity generation from different commercial wind turbines are examined. The yearly energy output, capacity factor and electrical energy cost of kWh produced by the selected wind turbines are calculated. In term of energy production, the results show that Adrar is the best location for harnessing the wind power and generating electricity. The capacity factors are found to vary from 6% at Skikda to 48% at Adrar. In addition, it was found that the minimum cost per kWh of electricity generated is about 0.0179 $/kWh at Adrar for the southern region, 0.0431 $/kWh at Oran for the coastal region and 0.0518 $/kWh at Setif for the highland region. Among all the considered models, the Suzlon S82-1500 wind turbine is found to be the most attractive in terms of cost per kWh. Based on the obtained results, the wind resource appears to be suitable for power production in the southern region, which makes it a viable substitute to diesel oil for electricity generation. © 2012 Elsevier Ltd. Source


Intissar A.,CNRS Environmental Sciences
Journal of Mathematical Physics | Year: 2014

Let &α(ℂ) be the Hilbert space generated by the orthonormal basis eα,ν n (z) = ( 2ν/π )1/4e ν/2 z2e-π2 ν (n+α)2+2iπ(n+α)z ; n ε{lunate} ℕ where ν > 0 and α are real numbers, this space is a particular case of (g{cyrillic}, χ)-theta Fock-Bargmann spaces recently constructed by Ghanmi-Intissar [J. Math. Phys. 54, 063514 (2013)]. In the present work, we consider on &α(ℂ) the weight shift operator M defined by Meα,ν n = ωneα,ν n+1, n ε{lunate} ℕ N where ωn = cα,νe 2π/ν n and cα,ν = e π/ν+2α and we show the chaoticity of the operator ℍp = MpDp+1; p = 0, 1, 2, ... where D is adjoint of M. © 2014 AIP Publishing LLC. Source


A method for reducing the rollover risk of an automotive vehicle includes:


Filippi J.-B.,CNRS Environmental Sciences | Pialat X.,CNRS Environmental Sciences | Clements C.B.,San Jose State University
Proceedings of the Combustion Institute | Year: 2013

Numerical simulations using a coupled approach between Meso-NH (Non-Hydrostatic) LES (Large Eddy Simulation) mesoscale atmospheric model and ForeFire wildland fire area simulator are compared to experimental data to assess the performance of the proposed coupled approach in predicting fine-scale properties of the dynamics of wildland fires. Meso-NH is a non-hydrostatic, large eddy simulation capable, atmospheric research model. ForeFire insures a front tracking of the fire front by means of Lagrangian markers evolving on the earth's surface according to a physical rate-of-spread model. The atmospheric model forces the fire behavior through the surface wind field, whereas the fire forces the atmosphere simulation through surface boundary conditions of heat and vapor fluxes. The FireFlux experiment, an experimental 32 Ha burn of tall grass instrumented with wind profilers and thermocouples, was designed specifically to estimate the atmospheric perturbation introduced by wildland fire. Comparisons of the simulations at different resolutions with the large-scale experiment validate the chosen coupling methodology and the choice of a coupled approach with a meso-scale atmospheric model for the prediction of wildland fire propagation. Distinct fire propagation behavior is simulated between coupled and non-coupled simulation. While the simulations did not reproduce high frequency perturbations, it is shown that the atmospheric model captures well atmospheric perturbations induced by combustion at the ground level in terms of behavior and amplitude. © 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved. Source

Discover hidden collaborations