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var str = 'Efficient model for solar steam generation';
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]]>
Developed parabolic collector]]>
Solar-powered boiler]]>
Controlled heat exchanger]]>
Optimum characteristic]]>
Solar fraction]]>
In this research, an advanced hybrid steam generation system using solar energy was designed, with higher performance and lower cost compared to other systems and researches. It's an ideal system where fossil fuels are still plentiful. The selected system units with the innovative automatic control allows the absorption of all levels of solar radiation and its exploitation in steam generation. The boiler is a classic fire tube one and the solar collector is a modified linear parabolic collector that tracks the sun in one of three tracking modes. A proper Matlab program has been prepared to determine and demonstrate the performance of the system and the optimal characteristic values of the collector that provide the maximum seasonal solar fraction of the plant. It was found that the average monthly daily solar fraction of the plant in Antalya, Mediterranean region, is 0.85 in June and 0.28 in January with the collector optimal characteristics and east-west tracking within 12 hours stable daily steam generation. It is demonstrated that the deviation in an optimum characteristic value of the collector causes a reduction in solar fraction. This study forms the basis for a similar plant construction project to test it in practice under real climatic conditions.]]>
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var str = 'Farwati, Mohamad Adnan';
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]]>
Journal of Renewable Energies; Vol. 26 No. 2 (2023): Volume 26 (Regular); 189 – 207]]>
Journal of Renewable Energies; Vol. 26 No 2 (2023): Volume 26 (Regular); 189 – 207]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i2]]>
Renewable Energy Development Center]]>
2023-12-05]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1151/1870]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1151]]>
10.54966/jreen.v26i2.1151]]>
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var str = 'The thermal and stored heat energy driving a Stirling engine for power generation';
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]]>
Photovoltaic]]>
Solar]]>
Stored heat energy]]>
Stirling engine]]>
MATLAB]]>
Battery backup]]>
South Africa’s national power grid is currently in dire straits. The lack of a dependable power supplier and rising electricity costs force the public and businesses to look for alternatives to meet their energy needs. These alternatives are costly to implement and beyond the financial reach of most South Africans. The most common alternative energy source is solar photovoltaic systems with large battery banks to survive Eskom's long, regular load-shedding schedules. This research aims to design and simulate a combined solar-thermal and stored heat energy-powered Stirling engine for power generation. The output of the research simulation was compared to a standard photovoltaic installation of similar power output. The results for this paper were generated from the simulation software package MATLAB. Such a system must have a lower capital cost to compete with solar photovoltaic systems with battery backup. The Stirling system was found to be cheaper than the deep-cycle gel system and about 11% cheaper than the PV system using lithium iron phosphate.]]>
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var str = 'Duvenage, Elardus Erasmus';
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]]>
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var str = 'Sutherland, Trudy';
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]]>
Journal of Renewable Energies; Vol. 26 No. 2 (2023): Volume 26 (Regular); 141 – 160]]>
Journal of Renewable Energies; Vol. 26 No 2 (2023): Volume 26 (Regular); 141 – 160]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i2]]>
Renewable Energy Development Center]]>
2023-12-05]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1150/1867]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1150]]>
10.54966/jreen.v26i2.1150]]>
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var str = 'Particulate matter air pollution in the Republic of Slovenia and its national spatial emissions release';
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]]>
Air pollution]]>
Particulate matter]]>
Heating season]]>
Emission release]]>
Slovenia]]>
In this work, an impact of particulate matter (PM) on air pollution and its emissions released is investigated. Concentration levels of PM10 and PM2.5 in the Republic of Slovenia (RS) were analyzed on daily, weekly, monthly, quartile, and annual data and then compared. The study was conducted from January 1, 2020 to December 31, 2020 at two monitoring stations, so-called urban traffic and urban industrial. Obtained results showed that the highest concentrations of PM in air were during the cold months of the year when the temperatures are lower (< 6%). Results from heating seasons (from October 1, 2019 and March 31, 2020 and from October 1, 2020 to March 31, 2021) showed the highest concentration levels of PM10 between 9:00 and 14:00 and between 18:00 and 22:00, with highest concentrations recorded during the winter months (January and February). Additionally, emission building inventory was built based on PM10 and PM2.5 emissions released. The study includes yearly spatial building emissions release model considering currently installed high PM emitted stoves. The building model for the Republic of Slovenia has been developed by using 500 x 500 m model grid. Obtained results showed that changing currently low efficient appliance with advanced appliance would result in significant lower PM emissions released from building sector.]]>
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var str = 'Dolsak Lavric, Petra';
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]]>
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var str = 'Ivanovski, Maja';
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]]>
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var str = 'Goricanec, Darko';
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]]>
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var str = 'Urbancl, Danijela';
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]]>
Journal of Renewable Energies; Vol. 26 No. 2 (2023): Volume 26 (Regular); 123 – 139]]>
Journal of Renewable Energies; Vol. 26 No 2 (2023): Volume 26 (Regular); 123 – 139]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i2]]>
Renewable Energy Development Center]]>
2023-12-05]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1149/1866]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1149]]>
10.54966/jreen.v26i2.1149]]>
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var str = 'Transition Energétique - Remplacement d’une Microcentrale Diesel par un Système Renouvelable Hybride : Etude de cas.';
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]]>
Photovoltaic generator]]>
Wind turbine]]>
Optimization]]>
Cost per kWh]]>
Genetic algorithm]]>
This paper aims to study the replacement of a Diesel Generator based plant by a hybrid renewable system. To overcome both source and load fluctuations, a battery-based storage system is used. The renewable energy resources available in southern Algeria is considerable. Actually, this region has one of the largest wind capacity in the country with wind speeds up to 4 to 6 m/sec, the wind energy density is 280-Watt/m2/ day. Meanwhile, the solar potential is characterized by an average duration of sunshine above 11 hours/day and the energy they can provide for a large-scale industry can change the development of the region and of the whole country.Genetic algorithms under optimtool is used to size hybrid systems. The resulting levelized cost of electricity (LPSP) of $0.262/kWh, is competitive and economical if a large-scale electricity production is undertaken. The loss of power supply probability or customer dissatisfaction rate (LPSP) of 1.2545 %, which is within standard limits.]]>
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var str = 'Dahmani, Aissa';
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]]>
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var str = 'Abdessemed, Rachid';
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]]>
Journal of Renewable Energies; Vol. 26 No. 2 (2023): Volume 26 (Regular); 109 – 121]]>
Journal of Renewable Energies; Vol. 26 No 2 (2023): Volume 26 (Regular); 109 – 121]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i2]]>
Renewable Energy Development Center]]>
2023-12-05]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1147/1865]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1147]]>
10.54966/jreen.v26i2.1147]]>
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var str = 'Comparative study between PI, FLC, SMC and Fuzzy sliding mode controllers of DFIG wind turbine';
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]]>
DFIG]]>
WECs]]>
Fuzzy logic control]]>
Sliding mode control]]>
Proportional- integral]]>
Fuzzy sliding mode control]]>
In speed control, double-fed-induction generator (DFIG) has attracted attention in wind energy conversion systems (WECs). These systems can offer higher performances by controlling converters that connect the generator windings to the grid network. Therefore, different control strategies have been used. We can find the proportional integral (PI) and sliding mode control (SMC) which offer better performances. However, PI has constant gains that can’t change with the external variation and SMC has a chattering problem. Therefore, a hybrid control system that combines fuzzy logic control (FLC) and SMC to perform fuzzy sliding mode control (FSMC) is proposed. The hybrid system can improve the FLC and SMC robustness. The DFIG modeling and each of the control strategies have been detailed. To demonstrate the effectiveness of the control strategies, a comparative study of different control strategies (PI, FLC, SMC and FSMC) is described and performed using MATLAB/Simulink software. The results obtained from the present study show that FSMC is more robust and efficient than the other controllers (PI, FLC and SMC). It has high performances (low settling time, high steady state accuracy) assuring a perfect power decoupling with minimal ripples and errors.]]>
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var str = 'Bouguerra, Zahira';
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]]>
Journal of Renewable Energies; Vol. 26 No. 2 (2023): Volume 26 (Regular); 209 – 223]]>
Journal of Renewable Energies; Vol. 26 No 2 (2023): Volume 26 (Regular); 209 – 223]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i2]]>
Renewable Energy Development Center]]>
2023-12-05]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1146/1871]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1146]]>
10.54966/jreen.v26i2.1146]]>
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var str = 'CFD study of active flow control around a wind turbine profile using synthetic jet';
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]]>
Flow control]]>
Synthetic jet]]>
S809 airfoil]]>
Wind turbine]]>
CFD]]>
In this study, numerical simulations are performed to investigate the effect of the position and jet angle of the synthetic jet on the aerodynamic characteristics of a wind turbine blade profile. The study is applied to the NREL S809 profile with a 1m chord, set at an angle of attack of 15.2° in a flow at a Reynolds number Re=106. The synthetic jet is placed on the extrados of the profile and modeled by a sinusoidal function. The flow around the blade profile is simulated by solving Navier–Stokes equations using the commercial software ANSYS Fluent based on the finite volume method. Turbulence is simulated using the two-equation SST model. The results show that the considered jet parameters have a strong effect on the aerodynamic characteristics of the profile. Applying an optimal combination of synthetic jet parameters significantly improves the aerodynamic performance of the profile.]]>
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var str = 'Boudis, Ali';
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]]>
var options = {
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var str = 'Tata, Madjid';
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]]>
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var str = 'Bekhti, Ahmed';
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]]>
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var str = 'Hamane, Dawoud';
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]]>
Journal of Renewable Energies; Vol. 26 No. 2 (2023): Volume 26 (Regular); 179 – 188]]>
Journal of Renewable Energies; Vol. 26 No 2 (2023): Volume 26 (Regular); 179 – 188]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i2]]>
Renewable Energy Development Center]]>
2023-12-05]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1145/1869]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1145]]>
10.54966/jreen.v26i2.1145]]>
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var str = 'Biodiesel production feedstocks: current state in Algeria';
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]]>
edible and non-edible vegetable oils]]>
Food security]]>
energy security]]>
Environment]]>
Biofuel]]>
Research and development of affordable, sustainable, and low-carbon energy sources capable of reducing dependence on fossil fuels, contributing to social and economic development, and improving environmental and health skills have become a global priority. In recent decades, biodiesel produced from oilseeds has received significant attention as an alternative biofuel. However, the use of first-generation oilseed crops has sparked controversy, and the use of local non-edible feedstocks is considered a promising alternative. The motivation behind this review is to provide an alternative and enlightening perspective on the use of non-edible vegetable oils for biodiesel production, with a particular focus on the current state of biodiesel production in Algeria. The objective is to assess the conditions under which this production could be sustainable and environmentally friendly while maintaining a balance between energy needs, economic stability, and environmental impact.]]>
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var str = 'Bessah, Rahma';
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]]>
var options = {
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var str = 'Danane, Fetta';
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]]>
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var str = 'Alloune, Rhiad';
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]]>
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var str = 'Abada, Sabah';
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]]>
Journal of Renewable Energies; Vol. 26 No. 2 (2023): Volume 26 (Regular); 161 – 177]]>
Journal of Renewable Energies; Vol. 26 No 2 (2023): Volume 26 (Regular); 161 – 177]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i2]]>
Renewable Energy Development Center]]>
2023-12-05]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1144/1868]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1144]]>
10.54966/jreen.v26i2.1144]]>
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var str = 'Prediction of direct normal irradiation using a new empirical sunshine duration-based model';
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]]>
Direct normal irradiation]]>
empirical model]]>
SVR]]>
sunshine duration]]>
all types of sky]]>
In this work, we are interested in presenting a new approach allowing us to express the Direct Normal solar Irradiation (DNI) according to the sunshine duration essentially. This choice is justified by the fact that in addition to the sunshine, duration has a strong correlation with solar irradiation, it is measured in many radiometric stations. Some clear sky models with modifications developed exclusively here are made valid for all types of sky. The proposed model is compared with one of the intelligent models such as the Support Vector Regression (SVR) for daily data from Ghardaïa.]]>
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var str = 'Takilalte, Abdelatif';
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]]>
var options = {
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var str = 'Dali, Ali';
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]]>
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var str = 'Laissaoui, Mohammed';
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]]>
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var str = 'Bouhallassa, Amar';
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]]>
Journal of Renewable Energies; Vol. 26 No. 1 (2023): Volume 26 (Regular); 91 – 103]]>
Journal of Renewable Energies; Vol. 26 No 1 (2023): Volume 26 (Regular); 91 – 103]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i1]]>
Renewable Energy Development Center]]>
2023-10-04]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1119/1030]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1119]]>
10.54966/jreen.v26i1.1119]]>
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var str = 'Design of an autonomous photovoltaic power supply system for Nyabikenke Hospital (Burundi) using the ETAP tool';
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]]>
Design]]>
Simulation]]>
Autonomous photovoltaic system]]>
Diesel generator]]>
ETAP]]>
Our energy future must be based on non-polluting energies with significant resources. Renewable energies are the best candidates, but the intermittency of their production requires finding efficient and environmentally friendly storage means. Solar electricity must be stored to be used later when needed. There are many ways to store electricity, and they all involve converting it to another form of energy that is easier to contain. A study on the design of an autonomous electrical system was carried out at Nyabikenke Hospital to solve the major problem of the lack of hydroelectric power at Nyabikenke Hospital. We therefore first sought to estimate the energy needs of the user and then proceeded to an optimal dimensioning of our system using the ETAP software. In normal operation, the photovoltaic field and the battery bank will operate, in the event of a cut in the two sources, the emergency Diesel generator intervenes. The design tool simulates the operation of an autonomous electrical system for a load of 131.5kW necessary for the hospital to be supplied. He can design any system from the experimental results of the components. The results of the simulation make it possible to characterize the operation of the system in an autonomous application, determine its performance, and evaluate the influence of the various losses.]]>
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var str = 'Niyonzima, Joel';
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var str = 'Niyonzima, Jean Bosco';
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Journal of Renewable Energies; Vol. 26 No. 1 (2023): Volume 26 (Regular); 67 – 90]]>
Journal of Renewable Energies; Vol. 26 No 1 (2023): Volume 26 (Regular); 67 – 90]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i1]]>
Renewable Energy Development Center]]>
2023-10-04]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1118/1035]]>
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info:eu-repo/semantics/article]]>
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https://revue.cder.dz/index.php/rer/article/view/1118]]>
10.54966/jreen.v26i1.1118]]>
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var str = 'Energy Renovation of an Old University Building';
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Energy saving]]>
Rehabilitation of old building]]>
TRNSYS]]>
Thermal insulation]]>
Old buildings consume a lot of energy and no longer comply with thermalregulations, which creates interior discomfort. Our work consists ofhighlighting the effect of the rehabilitation of the building on energy savings and thermal comfort. The case study is an old building converted into offices.We made a dynamic thermal simulation under TRNSYS 17 to analyze thethermal and energetic behavior of the building. The results obtained afterinsulating the opaque walls and replacing the openings are very conclusive.Surface losses decreased by 72%, the heating power decreased by 67%, andthe air conditioning power decreased by 50%.]]>
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var str = 'Kharchi, Razika';
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var str = 'Danane, Fetta';
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var str = 'Ounnar, Amel';
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Journal of Renewable Energies; Vol. 26 No. 1 (2023): Volume 26 (Regular); 57 – 66]]>
Journal of Renewable Energies; Vol. 26 No 1 (2023): Volume 26 (Regular); 57 – 66]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v26i1]]>
Renewable Energy Development Center]]>
2023-10-04]]>
Copyright (c) 2023 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/1117/1034]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/1117]]>
10.54966/jreen.v26i1.1117]]>