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Abbas M.,Unit of Solar Equipments Development UDES | Boumeddane B.,Blida University | Said N.,Development Center of Renewable Energy CDER | Chikouche A.,Unit of Solar Equipments Development UDES
International Journal of Hydrogen Energy | Year: 2011

In Algeria, the electricity demand is rapidly increasing. At the same time, Algeria is very rich in solar energy resources and possesses large wasteland areas in the Sahara that represent 80% of the total area and the market of solar energy is very promising. All these indicators make Algeria an ideal country for the implementation of the Concentrating Solar Thermal Power Plant technologies (CSTPP). In order to study whether the implementation of CSTPP under Algerian climate is economically feasible, we present in this article a techno economic assessment of 100 MW of CSTPP based on Dish Stirling technology using hydrogen as working fluid for centralized electricity production located in three typical sites of each geographical regions of Algeria (Algiers, In Salah and Tamanrasset). The National Renewable Energy Laboratory's SAM software (Solar Advisor Model) is used to evaluate the monthly energy production, annual energy output and the Levelized cost of energy (LCOE) for this study. The results indicate that Tamanrasset is the suitable site yielding the lower LCOE (11.5 c$/kWh) and the higher annual net electric energy output (221 GWh/y). © 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Source

Ounnar A.,Development Center of Renewable Energy CDER | Ounnar A.,University of Science and Technology Houari Boumediene | Bentahar F.,University of Science and Technology Houari Boumediene | Bouzaza A.,Chimie et Ingenierie des Procedes
6th International Conference on Thermal Engineering Theory and Applications | Year: 2012

Water polluted by pharmaceuticals effluent is a major concern for researchers in the environment field, particularly in water treatment. The presence of pharmaceuticals and their accumulation in natural waters is an emerging pollution leading to the ecosystems disruption and increased malfunction in the aquatic species reproduction such as fish. However, it is important to develop techniques for water treatment in order to meet the needs of pharmaceuticals degradation present with a threatening manner in wastewater. In this study, heterogeneous photocatalysis take place with using titanium dioxide as semi-conductor for its photochemical stability and photocatalytic activity in a wide range of pH. The objective of this work is to validate the effectiveness of pharmaceutical effluent treatment by TiO 2/UV photocatalysis process in batch reactor of 600 mL capacity. The interest of this study is not only on the degradation of the effluent, but also on a better control and understanding of the process by studying the reaction kinetics. The obtained results show that photocatalytic degradation rate of tylosin is between 82% and 87% for the selected concentrations, a maximum degradation is observed for low concentrations. The application of Langmuir-Hinshelwood model has led to the determination of the rate constant of tylosin photodegradation. Source

Khelifa A.,Development Center of Renewable Energy CDER | Touafek K.,Development Center of Renewable Energy CDER | Benmoussa H.,University of Batna | Tabet I.,Development Center of Renewable Energy CDER | Adouane M.,Development Center of Renewable Energy CDER
STA 2014 - 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering | Year: 2014

there are some elements that are the basis of most solar heating of water: the sensor (s), storage tank, heat transfer medium and interconnecting tubes. The hybrid solar collector PVT captures sunlight and converts it into heat which is transferred to the storage tank by means of a fluid such as water or air. An expansion vessel is used in closed to accommodate slight variations in volume that occur when the fluid is heated and expands, a heat exchanger is required to transfer heat from the manifold with water to exit the system faucet. In this section we will study and will present the energy behavior of a hybrid photovoltaic thermal solar PVT in a complete energy system (Enforceability of heating water for habitat in southern Algeria) and is very important right now especially in the Sahara and semi arid (Ghardaia). © 2014 IEEE. Source

Tabanjat A.,University of Technology of Belfort - Montbeliard | Becherif M.,University of Technology of Belfort - Montbeliard | Emziane M.,Masdar Institute of Science and Technology | Hissel D.,University of Franche Comte | And 3 more authors.
International Journal of Hydrogen Energy | Year: 2015

This paper deals with the efficiency enhancement of the hybrid Photovoltaic-Proton Exchange Membrane Electrolyser (PV-PEM ELS) system. The electrolyser water temperature has been controlled to improve its efficiency. The system consists of 59 kW PEM electrolyser supplied by a PV generator through a boost converter for H2 production. The PV panels were sized to 74 kW of Belfort region. The PV panel characteristics were experimentally validated. The effect of temperature and irradiance on the PV characteristics (output power, voltage and efficiency) is shown. The Maximum Power Point Tracking (MPPT) approach was proposed for maximizing the energy captured by the PV panels. The water heat transfer between both the PV panels and the PEM ELS using a water pump has been considered to provide the necessary temperature. Water heating inside the PEM ELS was controlled using Fuzzy Logic Control (FLC) technique. As the produced H2 flow is dependent on the input water heating, the instantaneous reference PEM ELS input water temperature was determined using FLC. The optimal input water temperature was determined in order to maximize H2 production considering the physical constraints, especially the temperature limitation to avoid the evaporation. Therefore, the water temperature was optimally controlled to its instantaneous reference value by the Proportional-Integral (PI) control. The produced H2 flow would expand if the input water was heated. The effectiveness of the proposed FLC methodology towards improving the hybrid PV-PEM ELS system efficiency was verified through the maximization of both the PEM ELS produced H2 flow and the PV captured energy. Copyright © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Source

Serir L.,Applied Research Unit on Renewable Energies URAER | Bouhdjar A.,Development Center of Renewable Energy CDER | Bournet P.E.,Agrocampus Ouest
Acta Horticulturae | Year: 2013

The determination of the Convective Heat Coefficients (CHC) is a challenge to get a detailed knowledge of the microclimate of greenhouses in order for instance to improve energy management of these buildings. Computational Fluid Dynamics tools (CFD) have been developed to predict the distributed inside climate. However, most of the previous studies focus on steady state cases for which the boundary conditions are established a priori by the modeller. This point is one of the limitations of CFD use. Complementary, Energy Simulation (ES) is based on an energy balance method which takes account of the dynamic variation of the boundary conditions (i.e. meteorological conditions) all day long, meaning that the wall temperatures are calculated at each time step. In the present paper, an ES model predicting the thermal behaviour inside a closed tunnel greenhouse is coupled to a CFD model. The ES model transmits the wall temperatures to the CFD model and conversely, the CFD model provides the ES model with CHC. The comparison between simulation results shows differences between the CHC calculated by ES (from empirical correlations) and those calculated by CFD. These differences are clearly higher for the vertical walls than for the roofs. Source

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