Unite de Recherche en Energies Renouvelables en Milieu Saharien

Adrar, Algeria

Unite de Recherche en Energies Renouvelables en Milieu Saharien

Adrar, Algeria
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Harmim A.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Belhamel M.,Renewable Energy Development Center Algeria | Boukar M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Amar M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
Energy | Year: 2010

This article provides the results and finding of an experimental work undertaken in the desert of Algeria. That aimed to compare experimental performance of a box-type solar cooker equipped with a finned absorber plate to a similar box-type cooker which absorber plate without fins. Tests have been carried out on the experimental platform of the Renewable Energies Research Unit in Saharan Environment of Algeria at Adrar. Adrar is located at a latitude 27° 53' North and a longitude 0° 17' West. Fins that have been used in solar air collectors enhanced heat transfer from absorber plate to air. Experimental tests have been undertaken as part of this project where was applied this phenomenon to a box-type solar cooker. The results of the experimental investigation have been rigorously analysed and showed that the stagnation temperature for box-type solar cooker equipped with a finned absorber plate was about 7% more than box-type solar cooker equipped with an ordinary absorber plate. The time required for heating water up to boiling temperature in both box-type solar cookers was reduced with about 12% when a finned absorber plate was used. © 2010 Elsevier Ltd.


Bouraiou A.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Bouraiou A.,Polytechnic School of Algiers | Hamouda M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Chaker A.,Polytechnic School of Algiers | And 3 more authors.
Energy Procedia | Year: 2015

This paper presents the modeling and simulation of photovoltaic module and array based on one and two diode model using the software Matlab/Simulink. Also, two fast and accurate methods are used to obtain the parameters of photovoltaic panel. The experimental validation of one and two diode model under STC condition and the simulation of P(V) and I(V) Characteristics of ISOFOTON 75 panel under different values of temperature and irradiation are presented. © 2015 The Authors. Published by Elsevier Ltd.


Marif Y.,University of Ouargla | Benmoussa H.,University of Batna | Bouguettaia H.,University of Ouargla | Belhadj M.M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Zerrouki M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
Energy Conversion and Management | Year: 2014

In order to determine the optical and thermal performance of a solar parabolic trough collector under the climate conditions of Algerian Sahara, a computer program based on one dimensional implicit finite difference method with energy balance approach has been developed. The absorber pipe, glass envelope and fluid were divided into several segments and the partial derivation in the differential equations was replaced by the backward finite difference terms in each segment. Two fluids were considered, liquid water and TherminolVP-1™ synthetic oil. Furthermore, the intensity of the direct solar radiation was estimated by monthly average values of the atmospheric Linke turbidity factor for different tracking systems. According to the simulation findings, the one axis polar East-West and horizontal East-West tracking systems were most desirable for a parabolic trough collector throughout the whole year. In addition, it is found that the thermal efficiency was about 69.73-72.24%, which decreases with the high synthetic oil fluid temperatures and increases in the lower water temperature by 2%. © 2014 Elsevier Ltd. All rights reserved.


Zerrouki M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Settou N.,University of Ouargla | Marif Y.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Belhadj M.M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
Energy Conversion and Management | Year: 2014

This work presents a numerical simulation of capillary film solar still (distiller) coupled in series with another conventional solar still. Different transfer phenomena of heat and mass are considered to evaluate the daily distillate production. The study takes into account the quality of brackish water with moderate salinity in Adrar city (south of Algeria). The performance of the system is evaluated and compared with that of conventional solar still under the same meteorological conditions. A numerical simulation is carried out to appreciate the developed model and to optimize the relationship between both distillers collecting surfaces. The obtained results show that the system daily production is at 54-83% higher than that of the conventional one. In addition, some parameters influences are studied to define the optimal operating conditions for the present system. For the first solar still, the inclination angle and surfaces ratio have a significant effect on distillate production. Brine flow rate and wind speed have slight effect on still production. © 2014 Elsevier Ltd. All rights reserved.


Saba D.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Laallam F.Z.,University of Ouargla | Hadidi A.E.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Berbaoui B.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
Energy Procedia | Year: 2015

Given the current energy challenge, renewable energy appear as a real and strategic solution for electricity generation, but the intermittent nature this type of energy we forced to combine at least two power sources to ensure continuity in supply of electricity. Typically multi-source renewable energy systems are managed by centralized approaches, but the limit of these approaches in several aspects such as the dynamic aspect management of system, integration or cancellation of one or more elements we require seek other more reliable approaches for the management of multi-source renewable energy systems. The proposed solution is an integration of Multi Agent Systems "MAS" in energy management, this discipline is the connection of several fields such as artificial intelligence, distributed computing systems and software engineering. "MAS" it is discipline that focuses on collective behaviors produced by the interactions of several autonomous entities called agents, these interactions revolve around cooperation, competition or coexistence between these agents, introducing the issue of collective intelligence and the emergence of structures interactions. © 2015 The Authors. Published by Elsevier Ltd.


Benhammou M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Draoui B.,Béchar University
Renewable and Sustainable Energy Reviews | Year: 2015

A transient one-dimensional model was developed for studying the thermal performance of earth-to-air heat exchangers (EAHE) for summer cooling under the Algerian Sahara. The effect of extremities was also taken into account. The model validation against both theoretical and experimental data of other researchers showed a good agreement. In addition, a detailed sensitive study was carried out in order to investigate the influence of geometrical and dynamical parameters on the thermal performance of EAHE. Results showed that the air outlet temperature decreases with increasing of pipe length but it increases with increasing of pipe cross section and air velocity. However, the daily mean efficiency increases when the length of pipe increases but it decreases when the cross section area of pipe or air velocity increases. It is also observed that the coefficient of performance drops quickly with increasing of air velocity. Considering as reference the thermal performance of EAHE under steady state conditions, the investigation of Derating Factor reveals that the thermal performance of EAHE in transient conditions is more influenced by the variation of operating duration, pipe diameter and air velocity. © 2014 Elsevier Ltd. All rights reserved.


Harmim A.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Merzouk M.,Blida University | Boukar M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Amar M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
Solar Energy | Year: 2012

A novel design of solar cooker is introduced. The cooker is of box-type equipped with an asymmetric compound parabolic concentrator (CPC) as booster-reflector. It consists of an insulated box equipped with a vertical double glazing cover on a side, and a vertical absorber plate laid out just behind the transparent cover. The booster-reflector is fixed on the glazed side of the box. The absorber plate and the glazing form a vertical channel, open at the top and bottom, and enclosed at the sides. The two openings allow the inside air circulation. A mathematical model of the heat transfer processes involved with this solar cooker, containing a cooking pot loaded with water and deposited on the box floor; was developed and the effects of various parameters, such as solar radiation, load of water and clouds on the dynamic behavior of the cooker are studied. © 2012 Elsevier Ltd.


Harmim A.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Merzouk M.,Blida University | Boukar M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Amar M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
Energy | Year: 2012

The construction and the performance evaluation of a new box-type solar cooker equipped with an asymmetric Compound Parabolic Concentrator (CPC) are presented. The optogeometrical design of the cooker was optimized for Adrar which is located in Algerian Sahara. A thermal model was developed for the cooker and validated with experimental results. The cooker performance was rated by using the first figure of merit (F 1 = 0.1681) and the second figure of merit (F 2 = 0.35). Experimental tests demonstrated that the cooker, which remains in a stationary position during all test period, is suitable for cooking even in winter and without having recourse to tracking towards the sun. © 2012 Elsevier Ltd.


Benhammou M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Draoui B.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Zerrouki M.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Marif Y.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
Energy Conversion and Management | Year: 2015

In this paper, a new design of passive cooling system which consists in an Earth-to-Air Heat Exchanger (EAHE) assisted by a wind tower is presented. This system is intended for the summer cooling in hot and arid regions of Algeria. A transient analytical model was developed in order to investigate the influence of design parameters on the performance of the EAHE. The model of the EAHE is validated against both theoretical and experimental data carried out by other authors. Since it is well-known that the performance of the EAHE systems is more influenced by the air flow velocity, another model was presented to predict the air velocity inside the buried pipe. Moreover, a burying depth of 2 m was adopted and the period under consideration is July where the ambient temperature exceeds 45°C. This study was also extended to examine the behaviour of system during the whole year. In addition, a sensitivity survey was curried out to investigate the influence of tower and pipe dimensions on the air flow velocity and the performances of the EAHE. Results showed that the wind tower dimensions (height, cross section) have not an important impact compared to the pipe dimensions (length, diameter). It is found that a tower with a total height of 5.1 m and a cross section area of 0.57 m2 can generate an air flow rate of 592.61 m3/h. Furthermore, it has been also observed that the daily cooling potential reached a maximum of 30.7 kW h corresponding to a pipe length of 70 m. The cooling effectiveness of the system is compared to that of traditional passive cooling system consisting in a wind tower with wet surfaces. The results indicated that the ambient air after passing through the wind tower coupled to the EAHE is colder than of that of the leaving the conventional cooling tower. © 2014 Elsevier Ltd. All rights reserved.


Ferroudji F.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Khelifi C.,Unite de Recherche en Energies Renouvelables en Milieu Saharien | Meguellati F.,Unite de Recherche en Energies Renouvelables en Milieu Saharien
International Journal of Renewable Energy Research | Year: 2016

Rotary machines have many rotating structures necessity design-optimization. Their structure motions are controlled at low-frequency by rigidity, at high-frequency by inertia and at resonance level by damping. Using modal model, dynamic design of the structure developed can be predicted, analyzed and improved. Recently, H-Darrieus wind turbine (HDWT) has received considerable attention due to its inherent structural characteristics. This machine intends a promising design of renewable energy conversion system in urban and isolatedareas. Though, the system suffers fromseveral dynamic problems caused by geometry, centrifugal and aerodynamic cyclic loadings. Present paper investigated dynamic design-optimization of a three-bladed (HDWT) based on its natural structural parameters using 3D-CAD-FEA using SolidWorks modeling and simulationsoftware. From simulation results obtained, (i) the minimum static safety factor of the wind turbine materials is equal to 1.4. It is greater than that recommanded by the international standard IEC61400-1, assessing an acceptable value to1.35 when the mass of the system is not obtain by weighting; (ii) the first three natural frequencies of the system are (17.73, 17.99 and 21.07Hz), the resultant mass participates (10.55, 10.44 and 0.04%), the modal damping (9.19, 9.17 and 9.05%), also resonant amplification (5.44, 5.44 and 5.52), magnitude ratios (100, 97.13 and 70.82%)are calculated and mode shapes associated are predicted and analyzed; and (iii) critical operating conditions of wind turbine under forced excitations due to the wind speeds at various regimes are also treated and assessed. The static and dynamic stability and reliability of the system are shown since all quality indicators tested are consistent according to structure dynamics standards made in steel materials.

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