Mohamed Nfaoui | University soultane moulay slimane (original) (raw)

Papers by Mohamed Nfaoui

Energy harvesting and systems, 2024

Solar energy is an excellent source of renewable power, but designing photovoltaic (PV) systems c... more Solar energy is an excellent source of renewable power, but designing photovoltaic (PV) systems can be challenging without proper knowledge of solar radiation. The amount of energy received at the installation site plays a crucial role in determining the number of panels required to meet the electrical demand. For a given electrical demand, higher levels of received energy imply a reduced number of panels required, and vice versa. Hence, having knowledge of this irradiance is of paramount importance in the design and sizing of solar energy systems. The primary objective of this article is to provide an accurate estimation of electricity production in a PV installation when it is affected by shading. To achieve this, we performed calculations of the irradiation (direct and diffuse) received by our installation using the "Hottel" method, which integrates relevant local site parameters for our study. Subsequently, we study the impact of shading by conducting shade mask measurements on our installation. This enables us to obtain an accurate estimation of the irradiance received by the PV panels. The measurements include surveys of the geometry of obstacles and shade measurements taken at various times of the day. Additionally, a practical study of shading effects will be conducted using "close shading masks." This method was applied to a 1.44 kW p PV installation located at the Faculty of Science and Technology of Settat (Morocco), where the output energy of PV panels was calculated. Finally, the effect of shading on the PV installation was quantified.

WSEAS transactions on heat and mass transfer, Apr 22, 2024

International Journal of Electrical Engineering and Computer Science, Dec 10, 2023

The effective utilization of solar energy at a specific geographical locale is contingent upon th... more The effective utilization of solar energy at a specific geographical locale is contingent upon the acquisition and assimilation of comprehensive and meticulous solar radiation data pertinent to that specific site. A profound understanding of these datasets constitutes a pivotal factor in the precision-driven design and dimensioning of solar energy systems. It ensues that the attainment of accurate system dimensioning is contingent upon the continual availability of spatially and temporally resolved measurements. The principal objective of this research endeavor is to expound upon the methodological approach employed in the computation of solar energy parameters, alongside the delineation of the pertinent dataset by extrapolating salient insights. Prior to the initiation of any optimization endeavor, a methodical scrutiny of the geospatial and temporal distribution of solar insolation stands as a preeminent prerequisite, indispensably contributing to the efficacious implementation of solar infrastructure. The assessment of solar energy generation potential within the examined region necessitates a meticulous investigation of the theoretical solar resource inherent to Khouribga. Through a meticulous computation regimen encompassing insolation and solar irradiance metrics, this investigation facilitates the discernment of the optimal incident angle for maximal energy absorption by solar photovoltaic cells.

Morocco has a significant solar deposit considering the values of the duration of insolation reco... more Morocco has a significant solar deposit considering the values of the duration of insolation recorded on almost the whole national territory exceeding the 2000 hours annually and reaching even 3900 hours in the highlands and the Moroccan Sahara. As a result, the amount of energy received on the ground exceeds 5 kWh / m² on average in several regions of Morocco, ie nearly 700 kWh / m² per year in the north and 2263 kWh/m² in the south, which favors the use of electricity. solar energy in different fields such as electricity generation, agro-food drying, etc. the knowledge of this deposit is of major interest to design and size solar energy systems. Thus, good sizing is possible only if the measurements are available continuously in space and time. The best way to do this is to have a series of meteorological and physical measurements from an Android operating system, and a microcontroller that is connected to sensors for each measurement, the collected data is sent to a server centra...

The study or applications of solar energy at a given site are dependent on more complete and deta... more The study or applications of solar energy at a given site are dependent on more complete and detailed data on the solar radiation of this site, the aim of this work is presented the method used in the calculation and describe the available data by trying to extract some useful information. We present the method used in the calculation and describe the available data by trying to extract some useful information. In our study we use programs through MATLAB to estimate the totality of the solar radiation on any inclined surface. Moreover, we will study in the last part the influence of exposure (orientation and inclination) on the amount of solar radiation received on a surface of 1m2. Then in order to study the theoretical solar field available in Khouribga, a series of insolation and irradiation data calculate, and then we apply the same strategy of this work to the 20 Moroccan cities in different time scales (every 3min, every day, every month and all year).

Le Maroc dispose d'un gisement solaire important compte tenu des valeurs de la duree d'in... more Le Maroc dispose d'un gisement solaire important compte tenu des valeurs de la duree d'insolation enregistrees sur la quasi-totalite du territoire national depassant les 2000 heures annuellement et pouvant atteindre meme les 3900 heures sur les hauts plateaux et le Sahara Marocain. Par consequent, la quantite d'energie recue au sol depasse en moyenne 5kWh/m² dans plusieurs regions du Maroc soit pres de 700 kWh/m² par an au nord et de 2263 kWh/m² au sud, ce qui favorise l'utilisation de l'energie solaire dans differents domaines tel que la production de l'electricite, le sechage agroalimentaire, etc. la connaissance de ce gisement est d'un interet majeur pour concevoir et dimensionner les systemes energetiques solaires. Ainsi, un bon dimensionnement n'est possible que si les mesures sont disponibles d'une maniere continue dans l'espace et dans le temps. La meilleure maniere pour ce faire est de se disposer d'une serie de mesures meteorologi...

Advanced Intelligent Systems for Sustainable Development (AI2SD’2020), 2022

AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES, 2021

This work is intended for comparative study the electricity production of a photovoltaic installa... more This work is intended for comparative study the electricity production of a photovoltaic installation by using the monocrystalline silicon technology. The article is done in the frame of the Laboratory of Nanosciences and Modeling activities, for constructing a local productivity map of photovoltaic technologies by integration the theoretical calculation method and using the Pvsystem software. Our work is divided in two parts; the first is devoted to, calculating through MATLAB simulation the solar radiation at the site under study by using the hotel's method. And evaluate the final productivity of our mini-PV installation. In the second part we use the PVsystem software for prediction of a PV installation performance. Then we compare the results obtained by two methods of calculation; theoretical calculation method and by using the Pvsystem software.

Energy Reports

Abstract The performance of solar systems to convert solar radiation depends on its inclination a... more Abstract The performance of solar systems to convert solar radiation depends on its inclination angle to the horizontal plane, independently from meteorological conditions. Sunlight should fall with steep angle to extract maximum power from solar panels. Therefore, optimum fixed tilt angles of solar panels should be changed monthly and seasonally. In our study, MATLAB program is used to estimate the total solar radiation on a tilted panel surface with any inclination. The implementation developed to allow us to extract the correct angle at which the maximum energy could be absorbed by the solar cells. We could determine the optimum tile angle for monthly, seasonal, and yearly solar radiation relative to the site of Khouribga city (latitude 3 2 ∘ 5 2 ′ North and longitude − 6 ∘ 5 4 ′ West), and we used the same method to draw the table of solar gains depending on the optimum tilt angle of the solar panels to the main Moroccan cities.

For the implementation of a physical and meteorological data of photovoltaic technologies and to ... more For the implementation of a physical and meteorological data of photovoltaic technologies and to homogenize the data between all measures performed by sensors and the data calculated by the simulation software. Our work is divided into three parts; the first is devoted to calculating, through MATLAB simulation, the solar radiation at the site under study by using a mathematical theoretical model. In the second part we will simulate the electricity production of a monocrystalline photovoltaic installation connected to the grid in the middle of Morocco, particularly in the province of Khouribga with a PVSYST Software. For examining the productivity of this type of PV panels. The third part highlights the centralized supervision of a station for monocrystalline silicon technology used in the second part by the use of an Android Operating System terminal. The measurements of physical and meteorological variables can be performed using various sensors. The acquisition of data is ensured ...