Applied Research Unit on Renewable Energies URAER

Ghardaia, Algeria

Applied Research Unit on Renewable Energies URAER

Ghardaia, Algeria
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Larbi S.,Polytechnic School of Algiers | Chergui T.,Applied Research Unit on Renewable Energies URAER
Renewable and Sustainable Energy Reviews | Year: 2010

In this paper, we present the performance analysis of a solar chimney power plant expected to provide the remote villages located in Algerian southwestern region with electric power. Solar energy and the psychometric state of the air in the south of Algeria are important to encourage the full development of solar chimney power plant for the thermal and electrical production of energy for various uses. We are interested in Adrar where solar radiation is better than other areas of Algeria. The obtained results show that the solar chimney power plant can produce from 140 to 200 kW of electricity on a site like Adrar during the year, according to an estimate made on the monthly average of sunning. This production is sufficient for the needs of the isolated areas. © 2009 Elsevier Ltd. All rights reserved.

Mecibah M.S.,University of Mentouri Constantine | Boukelia T.E.,University of Mentouri Constantine | Tahtah R.,University of Mentouri Constantine | Gairaa K.,Applied Research Unit on Renewable Energies URAER
Renewable and Sustainable Energy Reviews | Year: 2014

In this study, 11 empirical models are developed correlating the monthly mean daily global solar radiation on a horizontal surface with monthly mean sunshine records and air temperature data for six Algerian cities (Algiers, Oran, Batna, Ghardaia, Bechar, and Tamanrasset). In order to indicate their performance, seven statistical parameters were introduced; coefficient of determination (R2), mean percent error (MPE), mean absolute percent error (MAPE), mean bias error (MBE), mean absolute bias error (MABE), and root mean square error (RMSE). The results obtained in this study confirm the previous studies, which have indicated that the sunshine based models are generally more accurate than air temperature based models. According to the results, the best performances are obtained by the cubic and the quadratic regression models for the six Algerian stations. Moreover, these two regression models can be used for the proposed generalized models for predicting the monthly mean global solar radiation in other Algerian locations in the absence of the measured solar radiation data. © 2014 Elsevier Ltd.

Chergui T.,Applied Research Unit on Renewable Energies URAER | Larbi S.,Polytechnic School of Algiers | Bouhdjar A.,Renewable Energies Development Center
Renewable and Sustainable Energy Reviews | Year: 2010

The purpose of the work presented in this study is related to heat transfer and airflow modelling analysis in solar chimneys, according to some dominant parameters. A typical case of application is given in this study. It consists in analyzing a natural laminar convective heat transfer problem taking place in a chimney. Heat transfer and fluid dynamic aspects of the airflow, through an axis symmetric system in a dimensionless form, with well defined boundary conditions is thus examined. Results are related to the temperature distribution and the velocity field in the chimney and in the collector, determined by solving the energy equation, and the Navier-Stokes equations, using finite volume method. The numerical code based on this modelling is validated through the Vahl Davis benchmark solution for natural convection and to other authors for other cases. © 2010 Elsevier Ltd. All rights reserved.

Benyelloul K.,Applied Research Unit on Renewable Energies URAER | Benyelloul K.,Abou Bekr Belkaid University Tlemcen | Aourag H.,Applied Research Unit on Renewable Energies URAER
Computational Materials Science | Year: 2013

In this paper, two methods were applied to determine the different elastics constants of the face centered cubic austenitic stainless steel Fe 0.62Cr0.185Ni0.185. Firstly, the quantum mechanical simulation was applied based on the first principles calculations within the generalized gradient approximation (GGA) by using the efficient strain-stress method. Secondly an artificial neural network (ANN) is used based on back propagation algorithm training. ANN model has been developed for the analysis and simulation of the correlation between the elastic properties and composition. In the training model three input layers each accept the weight percentage of the alloy component (Fe, Cr and Ni), while the three different elastics constants c11, c12 and c44 were employed as outputs. Different models of ANN were developed to predict the elastic constants. The performance indices such as coefficient of determination, mean square error were used to control the performance of the prediction capacity of the models developed in this study. In addition to this, elastic constants obtained from ANN models were compared with those obtained from quantum mechanical simulation and with those reported in the literature. The prediction results obtained by the two methods seem to be satisfactory. © 2011 Elsevier B.V. All rights reserved.

Bakelli Y.,Applied Research Unit on Renewable Energies URAER | Hadj Arab A.,Renewable Energies Development Center | Azoui B.,University of Batna
Solar Energy | Year: 2011

This paper recommends an optimal sizing model, to optimize the capacity sizes of different components of photovoltaic water pumping system (PWPS) using water tank storage. The recommended model takes into account the submodels of the pumping system and uses two optimization criteria, the loss of power supply probability (LPSP) concept for the reliability and the life cycle cost (LCC) for the economic evaluation. With this presented model, the sizing optimization of photovoltaic pumping system can be achieved technically and economically according to the system reliability requirements. The methodology adopted proposes various procedures based on the water consumption profiles, total head, tank capacity and photovoltaic array peak power. A case study is conducted to analyze one photovoltaic pumping project, which is designed to supply drinking water in remote and scattered small villages situated in Ghardaia, Algeria (32°29′N, 3°40′E, 450. m). © 2010 Elsevier Ltd.

Aksas M.,Applied Energy Physics Laboratory LPEA | Gama A.,Applied Research Unit on Renewable Energies URAER
Energy Procedia | Year: 2011

Due to several climate changes caused by greenhouse gas and to the increasing need for clean energies, scientists drew attention to renewable energy sources, which are the most suitable solution in the future. Sparsely populated and flat open terrains observed in Batna region (North East of Algeria) and its semi-arid climate, make it a promising region for the development of solar and wind energies. In this article, we analyzed ten years of daily wind speed data in a remote area of Batna: Mustafa Ben Boulaid Airport. Wind power availability, as well as annual mean values of wind speed and power, were estimated. Frequency distribution of daily totals of wind speed data were counted and illustrated too. The results have been used to estimate net energy output of different wind turbines. This simulation shows a difference in wind generators production and allows us to choose the best wind turbine adapted to site conditions. Since solar and wind energy resources may be used to compensate each other, we evaluated also the solar potential of the same area. © 2011 Published by Elsevier Ltd.

Hamani H.,Ferhat Abbas University Setif | Douadi T.,Ferhat Abbas University Setif | Al-Noaimi M.,Hashemite University | Issaadi S.,Ferhat Abbas University Setif | And 3 more authors.
Corrosion Science | Year: 2014

The corrosion inhibition effect of new azomethine compounds: PhNNC (COCH3)NC6H4Y {Y=OCH3 (SB1), CH3 (SB2), H (SB3), Br (SB4) and Y=Cl (SB5)} on mild steel in 1M HCl, was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and quantum chemistry analysis. It has been found that the inhibition efficiency increased with increasing inhibitor concentration. The polarization curves showed that these Schiff bases function as mixed inhibitors. The adsorption of studied compounds on mild steel surface was found to follow the Langmuir isotherm. Molecular modeling was used to correlate corrosion inhibition properties and calculated quantum chemical parameters. © 2014 Elsevier Ltd.

Boutelhig A.,Applied Research Unit on Renewable Energies URAER | Hadjarab A.,Center for Development of Renewable Energies (CDER) | Bakelli Y.,Applied Research Unit on Renewable Energies URAER
Energy Procedia | Year: 2011

Since, the majority of the Algerian desert area enjoys plenty of sun and abundance of huge underground water sources, the stand alone photovoltaic pumping system (PVPS) is an appropriate solution to supply water for domestic, livestock and irrigation in remote locations. In this view, a comparison study has been carried out upon experimental results of two submersible DC pumps, namely: Water Max A64 (300 W) and Shurflo (130 W). The purpose is to select an optimum direct coupling Photovoltaic Pumping System (PVPS) configuration suitable to provide the maximum daily average quantity of water to satisfy the need of a remote farms consumption, situated in Hassi-Gara region, about 110 km south of Ghardaia, where the borehole and well heads vary from 10 m until 40 m. Photovoltaic (PV) powered by different selected PV arrays, based on PV Isofoton (110/24) modules, the two mentioned DC pumps were put into tests for different heads, at our PV pumping test facility, under winter outdoor conditions of Ghardaia site. Through the study and the interpretation of the obtained performances data, including the daily cumulative water and the overall efficiency of each selected (PVPS) configuration, two different direct coupling (PVPS) configurations have been selected to be eventually installed: The first (PVPS) configuration consists of the Water Max A64 (300W) submersible DC pump, PV powered by the PV array which consists of (2 × 2) Isofoton PV modules, is suitable to meet the need of an average daily water volume ranges from 6 m3 until 8 m3 however the second (PVPS) configuration which comprises the Shurflo (130 W) submersible DC pump, PV powered by the (2 × 1) Isofoton (110/24) PV modules can meet the need of the medium average daily water discharge less than 4 m3. The daily pumped volume of water is selected for a period of 8 hours of pumping and can be extended by extending the daily pumping hour's period during the long daylight hours; moreover, the large tanks are necessaries to preserve enough water to be used during cloudy days. © 2011 Published by Elsevier Ltd.

Boutelhig A.,Applied Research Unit on Renewable Energies URAER | Bakelli Y.,Applied Research Unit on Renewable Energies URAER | Hadj Mahammed I.,Applied Research Unit on Renewable Energies URAER | Hadj Arab A.,Center for Development of Renewable Energies (CDER)
Energy | Year: 2012

The Photovoltaic Water Pumping Systems (PVPS) constitute a potential option to drawdown water in the remote desert locations for domestic usage and livestock watering. However, the widespread of this technique requests an accurate information and experiences on such system sizing and installation. The aim of this work is to determine an optimum Photovoltaic (PV) array configuration, based upon Isofoton (110W/24V) PV modules, adequate to supply a DC Shurflo pump (120W, Im = 4A, Vm = 24V) with an optimum energy amount, under the outdoor conditions of Ghardaia site. Four different PVPS configurations have been put into tests, each system configuration consist of the Shurflo pump PV powered by one of the four different PV array configurations (2Px2S, 2Px1S, 1Px2S and 1 module). The tests have been carried out for different heads between 10 m and 40 m, under sunny daylight hours, at our PV pumping facilities. Through the comparison of the obtained results of different parameters as power, daily cumulative water and the overall efficiency of each PVPS configuration, it has been averred that the combination between the two PV array configurations (2PX1S) and (1PX2S) is suitable to provide the optimum energy. Powered by the selected PV array configuration, the mentioned pump is expected to deliver a maximum daily average volume of water. The recorded average quantity meets the demand of some farms in Djedid region, about 60 km south west of M'Zab valley. © 2011 Elsevier Ltd.

Gairaa K.,Applied Research Unit on Renewable Energies URAER | Benkaciali S.,Applied Research Unit on Renewable Energies URAER
Energy Procedia | Year: 2011

This study aims to explore the solar radiation field in southern Algerian peninsula, hourly measurements of global and diffuse radiant fluxes collected at Ghardaïa site (32.360 N, 3.810 W, 450 m above MSL), from 1 January 2005 to 31 December 2008, are employed. These data were used to further addressing radiant fluxes distribution on hourly, daily, monthly and seasonal basis that in turn are of particular important from the point of view of proper design of building energy systems as well as accurate evaluation of thermal environment within buildings. Results obtained suggest that the annual value of clearness and diffuses indexes are respectively 0.68 and 0.37, and the monthly average daily values of global solar radiant flux exhibits seasonal variability with higher values in summer (7762 Wh/m2) and lower ones during winter (3915 Wh/m2). Regarding diffuse radiant flux, measurements shows that the monthly average daily value is about (1173 Wh/m2) in winter, while it is around (2829 Wh/m2) in summer. © 2010 Published by Elsevier Ltd.

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