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The growth demand for energy and the depletion of fossil fuels leads researchers to develop alternative and sustainable energies sources such as solar and wind energies which have the largest potential in renewable energy. The aim of this paper is to provide solar and wind power to the utility grid. The proposed architecture of the hybrid system consists of Doubly Fed Induction Generator (DFIG) based...
Wind energy technology has seen steady growth in the energy market as a clean, renewable source of energy. This has brought attention to areas with moderate wind energy potentials. Darrieus type Vertical Axis Wind Turbines (VAWTs) allows capturing of this potential for energy production at a cost-effective scale. To improve the performance of these turbines their design needs to be modified. With...
The development of continuous sonochemical reactors for biodiesel production is a crucial requirement for the biofuel industry. Sonochemical reactors make use of ultrasound and acoustic cavitation to produce biodiesel from feed stocks like vegetable oils and waste cooking oils. Numerical modelling of sonochemical conversion of vegetable oil to biodiesel has been carried out in this work. Cavitation...
Solar panels outer surface inspection is among the most challenging tasks which burden the solar plants supervisors. An automatic inspection based on image processing ensured by robots seems beneficial. In our approach, a robot equipped with an HD camera and a processing unit browses a set of solar panels (placed alongside). Afterward, the robot captures a series of successive images containing a...
By ultrasonic spray, we have deposited CZTS films on Mo coated substrates. A sulfurization treatment was systematically performed under Argon atmosphere at 500 °C for one hour. Copper content effect of CZTS thin films of about 1 µm was studied by X-ray diffraction, Raman spectroscopy and optical transmittance measurements. The films exhibited the kesterite structure despite the appearance of some...
Cd1−xZnxS films suitable for solar cell photovoltaic applications have been deposited by chemical bath deposition (CBD) on to indium tin oxide (ITO) coated glass substrates. An aqueous solution containing cadmium sulfide, zinc sulfide and thiourea were used as sources of Cd+2, Zn+2, and S−2, respectively. Triethenolamine was used as complexing agent to control the Cd+2 and Zn+2 ions concentrations...
This study investigates a model based on thermodynamic concept to improve the performance of the power block of the concentrated solar power (CSP) systems. The analytical solution of this model established by Aspen HYSYS, Engineering Equation Solver (EES) software programs and Matlab software programming system (Code and Simulink package) to study its performance. The model consists of normal combined...
This paper describes a photovoltaic system with a robust controller which enhances the maximum power point tracking and stable output power. The proposed controller is designed based on sliding mode method. The performance of the proposed controller is simulated under different environmental conditions and compared with a classical Perturb & Observe method. Simulation results are presented to...
Despite to their impact on the environment and energy consumption, compression machines (direct expansion) are the most used air conditioner system in the residential sector. This large use is due to the low cost of this system compared to other technologies: absorption machine, ejection machine and adsorption machine. This paper evaluate the performance of solar assisted direct expansion air conditioner...
In this paper a steady-state natural convection was numerically simulated in horizontal rectangular cavity with a sinusoidal bottom wavy wall. This new type of surface rarely studied and investigated. The vertical walls are insulated while the bottom surface maintained to higher temperature than the top surface. In this numerical simulation that based on our elaborated code. the investigated parameters...
Thermal storage materials are essential components of concentrated solar power plants (CSP) as they improve system's availabilty and performance. Adding thermal energy storage to CSP power plant also increases it efficiency. The latent heat storage (LHS) as one type of storage using phase change materials (PCMs) has been used due to the large latent heat of fusion of most materials and also due to...
A hybrid photovoltaic-thermal (PV/T) greenhouse dryer of 150 kg capacity has been designed and constructed at Solar Equipments Development Unit (UDES) at Bou-Ismail, Algeria. The developed dryer has been used to dry the apricot waste when AC fan was in operation for forced mode convection. Experiments were conducted for drying of apricot waste in the month of June, 2016. Various hourly experimental...
In this paper, several physical and chemical analyses have been performed to determine the composition of the dust naturally deposited on photovoltaic panels installed in our RDI Solar Energy Platform in Rabat. The mineralogical composition was determined by X-Ray Diffraction (XRD) and X-Ray Fluorescence Analysis (XF). Additional characterization has also been performed by Thermal Analysis and Infrared...
In this paper, we propose a multiobjective evolutionary algorithm to solve the appliance scheduling problem in a smart home in a one-day horizon subdivided into 1440 time slots of one minute each. Mathematically, the appliance scheduling problem is formulated as an integer programming problem in which the decision variables consist of finding the optimal starting times of appliances under a time-varying...
This paper investigates the control problems of the single-phase grid connected to the photovoltaic system through an inverter with LCL filter. The control objectives are threefold: (i) forcing the voltage in the output of PV panel to track a reference signal provided by the MPPT block; (ii) regulating the DC link voltage to ensure the power transferring from the source to the grid; (iii) providing...
A modern Maximum Power Point Tracking (MPPT) method based on the incremental conductance (IncCond) control algorithm is discussed. This method features a variable step iteration of duty ratio in order to get over the trade-off between dynamic performance and steady state oscillation around maximum power point (MPP). This is done through an MPP pass-through detection α and an acceleration mechanism...
The principle of power generation by dye-sensitized solar cells has been known since the pioneering work of Gerischer and Tributsch in the sixties and seventies, wherein the introduction of Nano porous electrodes in 1990 by Grätzel improved the conversion efficiencies of the cell to about 7%. In this paper, we will construct a DSSC's small scale prototype. It will clearly picture how do DSSC's work...
The aim of this paper is to investigate the possibility of setting a wind farm in the region of Ksar-Chellala, which is located in the province of Tiaret at 260 km to the south of Algiers. For this purpose three-hourly wind data, recorded at 10m height over a period of thirteen years were processed and simulated using WAsP software. Annual, monthly, seasonal and daily wind characteristics were assessed...
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