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Saharan sand dust events present notable challenges to solar energy systems, particularly in regions with prevalent solar photovoltaic (PV) deployment. Experimental measurements and simulations using PVsyst software were conducted on two identical PV power plants—one cleaned and the other exposed to sandstorms. Empirical findings, supported by simulations, indicate that sand dust accumulation has negative effects on energy and output power, with a soiling rate of 0.25 %/day. Monthly power generation, energy generation, PV efficiency, and performance ratio decreased with increasing soiling percentages. Simulation results show that in July, for stationary PV power stations, monthly energy generation decreased from 661 kWh to 633 kWh and 576 kWh, with soiling percentages of 5 % and 15 %, respectively. Similarly, monthly power generation for two-axis solar tracking systems decreased from 984 kWh to 946 kWh and 865 kWh under the same soiling conditions. Simulation results indicate that in July, for fixed PV systems, the monthly PV efficiency could have declined from 10.96 % to 10.55 % and 9.55 % under soiling percentages of 5 % and 15 %, respectively. Similarly, for two-axis solar tracking systems, the monthly PV efficiency was found to decrease from 10.87 % to 10.45 % and 9.56 % under the same soiling conditions. In July, simulation results indicated that for fixed PV systems, the monthly performance ratio could have decreased from 73.53 % to 70.43 % and 63.98 % under soiling percentages of 5 % and 15 %, respectively. Similarly, the monthly performance ratio for two-axis solar tracking systems was found to decrease from 73.18 % to 70.34 % and 64.34 % under the same soiling conditions. The study highlights the importance of understanding soiling effects for investors, PV engineers, and researchers to develop mitigation strategies and maintenance protocols for PV power plants in dust-prone regions to sustain high performance. • Experimental measurements and simulations using PVsyst software were conducted on two identical PV power plants—one cleaned and the other exposed to sandstorms. Empirical findings, supported by simulations, indicate that sand dust accumulation has negative effects on energy and output power, with a soiling rate of 0.25%/day. • Monthly power generation, energy generation, PV efficiency, and performance ratio decreased with increasing soiling percentages. • Simulation results show that in July, for stationary PV power stations, monthly energy generation decreased from 661 kWh to 633 kWh and 576 kWh, with soiling percentages of 5% and 15%, respectively. Similarly, monthly power generation for two-axis solar tracking systems decreased from 984 kWh to 946 kWh and 865 kWh under the same soiling conditions. • Simulation results indicate that in July, for fixed PV systems, the monthly PV efficiency could have declined from 10.96% to 10.55% and 9.55% under soiling percentages of 5% and 15%, respectively. Similarly, for two-axis solar tracking systems, the monthly PV efficiency was found to decrease from 10.87% to 10.45% and 9.56% under the same soiling conditions. • In July, simulation results indicated that for fixed PV systems, the monthly performance ratio could have decreased from 73.53% to 70.43% and 63.98% under soiling percentages of 5% and 15%, respectively. Similarly, the monthly performance ratio for two-axis solar tracking systems was found to decrease from 73.18% to 70.34% and 64.34% under the same soiling conditions. [ABSTRACT FROM AUTHOR]

Abstract In recent years, more and more attention has been paid to clean energy. Large-scale photovoltaic power plants are increasing. Photovoltaic power generation will be destroyed at a high wind speed, affecting the efficiency of power generation. Based on the computational fluid dynamics technology and the use of porous media model, this paper uses Fluent to numerically analyze the windbreaks of photovoltaic power generation. The influence of the inlet wind speed and the porosity of the windbreaks on the differential pressure across the photovoltaic panels was studied. The results show that with the increase of wind speed, the differential pressure of the photovoltaic panel is also increasing; installing the windbreaks with a porosity of 0, the differential pressure of the PV panel decreases. In addition, the pressure drop of the photovoltaic panel can be reduced by 50%-68% due to the effect of the windbreaks at different wind speeds; the porosity of the windbreaks panel is the better at 0.25-0.5, compared with the windbreaks without installation, the differential pressure of the photovoltaic support bracket decreased by 18.75%-35.84%. [ABSTRACT FROM AUTHOR]

At the dawn of the twenty-first century, one of the major problems of humanity is to combine energy and the respect for environment. A problem of sustainable development has been clearly demonstrated in the Earth Summit in RIO (2012). Among the major battles to be fought in this century for the survival of the planet is to include energy efficiency as an international political priority with the reduction of emissions of greenhouse gases. Renewable energy, inexhaustible, clean, are needed in these conditions as a priority. The Algerian energy strategy is decidedly towards sustainable development by integrating the promotion of renewable energy. The legislative and regulatory framework adopted in recent years testifies to this irreversible commitment. A national program for renewable energy and energy efficiency in Algeria allows at the horizon 2030 the production from renewable energies of 40% of the needs of Algeria in electricity. Since twenty years, Tunisia has established the institutional and regulatory framework of energy management in general. A Tunisian Solar Plan (TSP) with 40 projects was launched in December 2009. Its objective is to provide Tunisia a capacity of renewable energy production of about 1000 MW in 2016 and 4700 MW in 2030. [ABSTRACT FROM AUTHOR]

At the dawn of the twenty-first century, one of the major problems of mankind is to combine the energy, the respect for environment. A problem of sustainable development has been clearly demonstrated in the Earth Summit in RIO (2012). Among the major battles to be fought in this century for the survival of the planet is to include energy efficiency as an international political priority, reduce emissions of greenhouse gases. Renewable energy, inexhaustible, clean, are needed in these conditions as a priority.As part of its energy strategy, Morocco gives priority to the development of renewable energy and to the sustainable development.The Moroccan Law on Renewable Energy aims to promote energy production from renewable sources, its marketing and its export by public or private entities.The Law of Energy Efficiency aims to integrate energy efficiency techniques in a sustainable manner.It is created under Law No. 57-09 "a Moroccan Agency for Solar Energy" aimed to achieve a developmentprogram of integrated projects for generating electricity from solar energy, with a minimum total capacity of 2000 MW. [ABSTRACT FROM AUTHOR]

Abstract: The electromagnetic interference of power lines to nearby metallic pipelines has been a subject of research for many decades. Usually attention was given to gas or oil pipelines that shared the same rights-off-way with a power line for large distances. However, the recent advancement of renewable energy sources and specifically Photovoltaic (PV) power, due to generous incentives provided in many countries, has resulted in installations of large PV power stations even in agricultural areas. This brought up cases where such power stations in the MWp level, typically connected in medium voltage through buried cables, are located in the vicinity of metallic irrigation pipelines. Under certain conditions, these situations may result in induced voltages and currents on the pipeline that can pose threats to operating personnel. This work presents an analysis of the problems through a quasi-real case study adapted from a real case of a PV power station. The calculation methodology involves a hybrid method that is used in a way to reduced computational time. Results are presented both for normal operating conditions and faults in the power station and may be useful for both agriculture professionals and engineers. [Copyright &y& Elsevier]