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Several numerical models were adopted to simulate the flow behavior inside an oscillating column OWC device. The current paper presents a comparison between two numerical models, the prime is based on the study of the air flow in a simplified OWC piston model, and the other takes into consideration the whole domain composed of the OWC chamber coupled with a wave tank WT; which enable to investigate...
In this paper we present the study of a hybrid photovoltaic/thermal panel (PV/T). It consists of a sheet form with several inputs-outputs opening (I/O) of coolant fluid, confined between the rear face of the panel and a Plexiglas support plate. The system is designed to maintain the temperature of the PV panel near ambient temperature. Heat transfer through the components of PV/T collector, taking...
In this paper a new Maximum Power Point Tracking algorithm based on the mathematical model is proposed for photovoltaic systems that include photovoltaic solar module, boost converter and a resistive load.
The impact of soiling or dust is a major challenge in the use of photovoltaic (PV) panels in numerous regions of the world. In this paper we present a technology platform that can be used to deploy autonomous vehicles for cleaning solar panels. A PV power station is modeled using the Virtual Robot Experimentation Platform and Robot Operating System (ROS) is used for the algorithms to control the vehicle...
In this work, a three dimensional laminar mixed convection of nanofluid flow in horizontal concentric annulus is investigated numerically based on single-phase fluid approach. The constant heat flux is applied on the outer cylinder, while the inner cylinder is adiabatic. The annular space is filled with Silver-Water nanofluid. The governing equations are discretized using the finite-volume method...
The short-term forecast of electricity consumption plays a vital role in the effective management of allocated resources to electricity generation. A reduction in the average forecasting error of 1% can save thousands or even millions of dirhams in an electricity generation unit. Therefore, predicting the electricity consumption is necessary to minimize costs of over or under production. The work...
A numerical simulation of the heat transfer and temperature distribution through the layers of a photovoltaic (PV) solar panel is performed in this study to explore its electrical performance and efficiency while being subjected to forced convection due to the surrounding wind. A commercial PV panel was taken as a basis to model this work. A mechanical meshing system and the finite volume method computational...
This paper presents the results of modeling and simulation of the the DC characteristics of an Al0.25Ga0·75N/GaN Metal Oxyde Semiconductor High Electron Mobility Transistors (MOSHEMT's). This study is achieved by using a drift diffusion transport model of a commercial device simulator silvaco. Two dimensional numerical simulation is used to describe significant physics in the characteristics for Al...
In order to evaluate the energy production of a solar system, the tilted global radiation is needed. Generally, only the global horizontal radiation data are available. To calculate a tilted global radiation, it is necessary to estimate the diffuse or the direct component of the horizontal solar radiation. In this article, a statistical procedure has been employed to develop correlations between the...
The induction machine operating as a generator in isolated areas has received considerable attention in recent years, however the main drawback is poor voltage control when speed and load change. This paper present indirect vector control strategy for both SEIG and induction motor-(self excited induction generator feeding induction motor for different use) using classical regulator proportional integral...
The shade effect of a rooftop photovoltaic (PV) collector on a roof is usually ignored in building energy simulation in Transient System Simulation (TRNSYS) software. This disregard is due to either the unavailability of a suitable shading component in the simulation software or to an assumption that the shade on opaque surfaces, such as roofs, has small impact on the indoor temperature and the subsequent...
The inverter is a device that is used as an interface between the photovoltaic energy and the grid. The harmonic and distortion of the output current, and efficiency of the inverter are the main issues. This paper presents a model of Sinusoidal Pulse Width Modulation (SPWM) methods of unipolar and bipolar inverters in MATLAB and Psim software. A numerical model of the LC filter is derived in order...
This paper presents a simple 1-D modelling to describe the behavior of the oscillating water column device (OWC) used for wave energy conversion. We are interested in the free water surface motion inside the chamber, it is considered as a piston mass moving up and down due to the successive incident monochromatic waves. Two models are considered: the model without turbine (assuming the transformation...
solar energy represents a significant potential that has been exploited through various technologies. Photovoltaic energy is an example. It is an attractive solution for the production of electricity. This work describes a photovoltaic generator connected to the grid using passive filter L, LC, LCL, comparing to damping LCL filter with series and parallel resistor. The proposed system compares the...
We have investigated theoretically the optical absorption and magnetic properties of Mn doped 4H-SiC, using the first principal calculation, based on Full Potential Linearized Augmented Plane Wave (FPLAPW) method of Density Functional Theory (DFT). The obtained results indicating that optical absorption increasing at visible light region as function manganese concentration doped 4H-SiC, also the Mn...
this paper demonstrates a complete modeling and simulation of 15MW solar photovoltaic grid connected at the site of Oued Kebrite a town and commune in Souk Ahras Province in north-eastern Algeria. PVsyst software package was used to analyse the performance ratio and the different losses that occur in the system.
Dust buildup on the surface of reflectors is a major challenge facing concentrated solar power (CSP) plants deployed in the MENA (Middle East and North Africa) region. Soiled CSP reflectors cause the efficiency of the solar field to drop. Thus, monitoring the loss of reflectance is essential to develop adequate cleaning strategies and evaluate the economics of the plants. The goal of this study is...
The measured solar radiation at the ground level is behaving like a very random variable, because of various disturbances encountered throughout its trajectory through the atmosphere in particular; winds, cloudiness, humidity and temperature variations… etc. As the accumulated daily global solar energy is an indispensable parameter for designing of solar systems (photovoltaic and thermal) and its...
A new software for designing photovoltaic solar installations in a 3D environment has been developed with the support of the UPV Valencia. This paper presents the capabilities of the software designing a ground power plant in Marrakesh as a case study. The software merges several well-known tools like PVGYS and SketchUp 3d. A shadows study of the surrounding buildings is done to find out the area...
This study presents a simulation procedure to describe the current-voltage and power-voltage characteristics of photovoltaic (PV) solar cell or module of different types of technologies; mono-crystalline silicon, multi-crystalline silicon and Thin film under various level of irradiation and different value of temperature based on LabVIEW software. The desired parameters of PV module including short...
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