Browsing by Author "Driss, Zied"

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A comparison between a conventional and a convergent collector of a solar chimney power plant
(University of Eloued جامعة الوادي, 2018-12-10) Ayadi, Ahmed; Nasraoui, Haythem; Bouabidi, Abdallah; Driss, Zied; Kchaou, Hedi; Abid, Mohamed Salah
A numerical model is developed to assess the performance of a solar chimney power plant while varying the collector roof angle. A comparison between a convergent collector roof and a conventional setup of a solar chimney power plant is presented. A two-dimensional steady model has been developed using the commercial computational fluid dynamics (CFD) code "Ansys Fluent 17.0". For each collector roof configuration, the distribution of the magnitude velocity, the temperature, the pressure and the turbulent kinetic energy were presented and discussed. The obtained results present an interesting data which can provide the thermal characteristics of the air flow for the designers and the engineers to improve the overall efficiency of an existing solar setup.
Developed nonlinear model based on bootstrap aggregated neural networks for predicting global hourly scale horizontal irradiance
(جامعة الوادي Université ofEl-Oued, 2023-05-06) Dahmani, Abdennasser; Ammi, Yamina; Hanini, Salah; Driss, Zied
This research study examines the use of two models of artificial intelligence based on a single neural network (SNN) and bootstrap aggregated neural networks (BANN) for the prediction value of hourly global horizontal irradiance (GHI) received over one year in Tamanrasset City (Southern Algeria). The SNN and BANN were created using overall data points. To improve the accuracy and durability of neural network models generated with a limited amount of training data, stacked neural networks are developed. To create many subsets of training data, the training dataset is re-sampled using bootstrap re-sampling with replacement. A neural network model is created for each set of training datasets. A stacked neural network is created by combining multiple individual neural networks (INN). For the testing phase, higher correlation coefficients (R = 0.9580) were discovered when experimental global horizontal irradiance (GHI) was compared to predicted global horizontal irradiance (GHI). The performance of the models (INN, BANN, and SNN) demonstrates that models generated with BANN are more accurate and robust than models built with individual neural networks (INN) and (SNN).
Effect of aluminum balls on the productivity of solar distillate
(Elsevier, 2020-08-01) Attia, Mohammed El Hadi; Driss, Zied; Manokar, A Muthu; Sathyamurthy, Ravishankar
Drinking water has become a real global problem, despite the abundance of unsaturated saltwater and colorless, which do not meet the requirements of the World Health Organization. The El Oued, in the southeastern part of Algeria, contains vast quantities of salt water and non-potable water. Solar distillation can be used as a solution to resolve this trouble. To provide drinking water, we use free sunlight to treat salt water. The traditional solar distillation device, which is one mile long (0.5×0.5 m), is designed to confirm the effectiveness of this solution. The traditional single slope solar distillation, its dimensions (0.5×0.5 m), is designed to confirm the effectiveness of this solution. Solar distillation is an environmental, economic and simple technique, but it needs some modifications to increase the distilled water production. In this work, we added aluminum balls inside the solar distillate box. In this work, we added 42 aluminum balls with a diameter of 2 cm inside a solar distillates box; positioned as follows (6 balls x 7 balls). The results showed that aluminum balls increased the distillation of distilled water by about 27.16 %.
Effect of heat flow via glazing on the productivity of a solar still
(جامعة الوادي - university of el oued, 2019-12-25) Khechekhouche, Abderrahmane; Driss, Zied; Durakovic, Benjamin
In many parts of the world, particularly in the Greater Maghreb, desalination of water by solar energy is practiced with incredible abundance. Drinking water shortage has become a major problem. Improving the efficiency of solar distillers in several laboratories around the world is still one of the major concerns of research topics. In this work we want to show that the heat flow through the glazing can also be considered as an index on the productivity of pure water from a conventional solar still.
Effect of the Preheating Inlet Air on the G222 Fuel Combustion
(جامعة الوادي - university of el oued, 2018-11-25) Attia, HadiMohammed El Hadi; Driss, Zied; Khechekhouche, Abderrahmane
In this paper, a numerical simulation is developed to study the preheating effect of the air in a three-dimensional cylindrical combustion chamber using the FLUENT-CFD code. Particularly, we are interested on the calculation of the characteristic parameters such as the axial velocity, the temperature and the mass fraction of carbon monoxide. This study consists of a special treatment of mathematical models. The considered approaches resolve the governing equations of system. The main objective of this work is to study the behavior of the parameters considered previously during the variation of the air inlet temperature. The obtained results show that the variation of the inlet temperature presents a direct effect on the considered parameters
Effect of using sponge pieces in a solar still
(جامعة الوادي - university of el oued, 2022-07-22) Bellila, Abdelkader; Kemerchou, Imad; Sadoun, Ali; Driss, Zied
Solar distillation is a very effective way to obtain pure water, especially in isolated areas where the water is infected or polluted to obtain drinking water. Two conventional solar stills of the same size (0.5 x 0.5 m) were tested for 8 hours. One still is priced as an SSR reference still and the other still which contains pieces of sponge is SSM and that is the subject of our work. The results show that the use of sponge in winter improves the yield of 10 %.
Enhancing the solar still output using micro/nano-particles of aluminum oxide at different concentrations: An experimental study, energy, exergy and economic analysis
(Elsevier, 2021-09-01) Benoudina, Belkheir; Attia, Mohammed El Hadi; Driss, Zied; Afzal, Asif; Manokar, A Muthu; Sathyamurthy, Ravishankar
In this work, the use of micro/Nano-particles of aluminum oxide (Al2O3) with various concentrations in solar still has been reported. Three solar distillers has been fabricated and tested: first distiller is a Conventional Solar Still (CSS), the second distiller is a Modified Solar Still (MSS) contains micro-particles of Al2O3 (MSS – 0.1, 0.2 and 0.3% MP of Al2O3) and the third distiller is a MSS contains Nano-particles of Al2O3 (MSS – 0.1, 0.2 and 0.3% NP of Al2O3). In this experimental study, the micro/Nano-particles of the Al2O3 concentrations are prepared at the concentration ratio of 0.1, 0.2 and 0.3%. From the experimental outputs by adding Nano-particles of Al2O3 with concentrations of 0.1%, 0.2% and 0.3% in the CSS, the productivity of 4.9, 5.47 and 6.12 L/m2 has been observed. However, when using the micro-particles of Al2O3, the MSS productivity is equal to 4.07, 4.54 and 4.96 L/m2 for the concentrations equal to 0.1, 0.2 and 0.3%, respectively. While the maximum productivity of the CSS without micro/Nano-particles of Al2O3 was 3.02 L/m2 . Furthermore, the daily increase in yield of 62.25, 81.12 and 102.64% are obtained when using the Nano-particles of Al2O3 with the concentrations of 0.1, 0.2 and 0.3% respectively, as compared to the CSS. By using the micro-particles of Al2O3, the daily increase reaches only 34.77, 50.33 and 64.24% for the concentration equal to 0.1%, 0.2% and 0.3%, respectively as compared to the CSS.
Induction machines diagnosis by the time's harmonics
(جامعة الوادي - university of el oued, 2020-12-01) Allal, Abderrrahim; Khechekhouche, Abderrahmane; Driss, Zied
The induction motor is currently becoming the key element of most industrial equipment. Despite these advantages, a certain number of constraints of very different natures can affect the lifetime of this machine, causing considerable economic losses. This work is the study experimental of defects for an asynchronous machine (with and without defect). After having described the main defects that can occur on these. In this study, we propose a method called induction machines diagnosis by the time's harmonics. This technique is based to study the influence of a defect of short-circuiting on the studied induction motor, we will find the rank of the harmonic of the most influenced by the number of the rank default. this study will find the diagnostic index of induction motor with stator default using the time harmonics. The results obtained show that the 3rd order time-harmonic is very sensitive compared to the other harmonics
Numerical simulation of the flow rate effect on the evolution of a negatively buoyant water jet
(جامعة الوادي - university of el oued, 2020-12-25) Allal, Abderrrahim; Khechekhouche, Abderrahmane; Driss, Zied
A numerical simulation study was done on a penetrating pure water jet injected into another surrounding salt water miscible with negative buoyancy conditions. For the incompressible filtered Navier-Stokes equations and the sum of the fluid model volume, we used a transient Computational Fluid Dynamics (CFD) solver (VOF model). A finite volume discretization method using Open Source code given in Open Foam 2.3.0. was used to solve these equations. The flow has a significant impact in the laminar system on the evolution of the jet in terms of subsequent permanent phase as well as transient regime
Numerical simulation of the flow rate effect on the evolution of a negatively buoyant water jet
(جامعة الوادي - university of el oued, 2020-11-25) Eleuch, Oumaima; Latrache, Noureddine; Frikha, Sobhi; Khechekhouche, Abderrahmane; Driss, Zied
A numerical simulation study was done on a penetrating pure water jet injected into another surrounding salt water miscible with negative buoyancy conditions. For the incompressible filtered Navier-Stokes equations and the sum of the fluid model volume, we used a transient Computational Fluid Dynamics (CFD) solver (VOF model). A finite volume discretization method using Open Source code given in Open Foam 2.3.0. was used to solve these equations. The flow has a significant impact in the laminar system on the evolution of the jet in terms of subsequent permanent phase as well as transient regime
Numerical Study of the Combustion of CH4-C3H8/ Air: Application to a Combustion Chamber with Two Coaxial Jets
(جامعة الوادي - university of el oued, 2017-11-15) Attia, Mohamed El Hadi; Driss, Zied; Khechekhouche, Abderrahmane
In this study, we studied numerically the non-premixed combustion provided by two coaxial methane-propane/air jets in a 3D cylindrical combustion chamber. To study this kind of phenomenon we used a special treatment of the mathematical model and we chose two models of computation PDF and LES. In order to find the aero-thermo-chemical characteristics in the burner, namely: axial velocity, temperature and mass fraction of carbon monoxide CO. Using commercial calculation software CFD Fluent The objective of this work is to research the fuel that reduces the emission of carbon monoxide CO, which is considered a gas toxic to the environment, by comparing the two fuels CH4 and C3H8. The results give methane fuel reduces carbon monoxide as a pollutant chemical species in combustion products compared to propane fuel
Performance enhancements of conventional solar still using reflective aluminium foil sheet and reflective glass mirrors: energy and exergy analysis
(Springer Berlin Heidelberg, 2021-07) Selvaraj Chandrika, Vanitha; Attia, Mohammed El Hadi; Muthu Manokar, Athikesavan; Pedro Garcia Marquez, Fausto; Driss, Zied; Sathyamurthy, Ravishankar
Many researchers are seeking simple and successful solutions to increase the output from the solar distiller. In this research work, reflective mirrors and reflective aluminium foil sheet were fixed on inner surfaces of the single-slope solar distiller, leading to more water production. The presence of reflective mirrors and reflective aluminium foil sheet on inner surfaces of the solar distillate permits the reflection of solar radiation falling inside the basin. Experiments were carried out on three stills: the first distiller is conventional solar still with black painted walls (CSS-BPW); the second distiller is conventional solar still with reflective aluminium foil sheet walls (CSS-RAFW); and the third distiller is conventional solar still with reflective glass mirror walls (CSS-RGMW). The maximum total drinking water productions from the CSS, CSS-RAFW and the CSS-RGMW are 3.41, 5.1 and 5.54 kg/m2 , respectively. Compared to the CSSBPW, the production of drinking water was increased by 68.57% when using the reflective glass mirrors and 48.57% when using the reflective aluminium foil sheet.
Performance Evaluation of Modified Solar Still Using Aluminum Foil Sheet as Absorber Cover – A Comparative Study
(ASTM International, 2021-09-01) Attia, Mohammed El Hadi; Driss, Zied; Abdelgaied, Mohamed; Manokar, A Muthu; Sathyamurthy, Ravishankar; Hussein, Ahmed Kadhim
Solar desalination is one of the sustainable solutions to produce freshwater from brackish water. Unavailability of drinking water is a major socioeconomic problem in southeastern Algeria that affects a large population. In the face of the problem, local researchers are adopting solar distillation, which appears to be a suitable and inexpensive solution. Improving the productivity of a solar greenhouse still represents the subject of several studies around the world looking for ways to increase the yield of a solar still. The idea behind this paper is to use the aluminum foil sheet as the absorber cover to improve the productivity of a solar still. To obtain the influence of utilizing the aluminum foil sheet as the absorber cover on a yield of a solar still, the conventional still with the black absorber surface and modified solar still with the aluminum foil sheet as the absorber cover were compared at the same climate conditions. The experimental investigation was performed on different days. Experimental work shows that this technique has a negative effect on the productivity of the distiller, which is reduced by 1.5 to 2.5 times compared to the black absorber distiller. Therefore, it is not recommended to use an aluminum cover in regular solar distillation.
Sand dunes effect on the productivity of a single slope solar distiller
(Springer Berlin Heidelberg, 2020-04) Khechekhouche, Abderrahmane; Benhaoua, Boubaker; Manokar, Muthu; Sathyamurthy, Ravishankar; Kabeel, Abd Elnaby; Driss, Zied
Access to drinking water in many parts of the globe is shrinking over the years and much of the water resources are polluted or unpurified. North Africa is facing a huge water shortage due to drought and climate change. Water desalination has become very popular and serves as solar distillation which is proving to be an economical, simple and ecological technique, especially in rural and remote areas. Significant efforts have been made by many researchers in various laboratories to increase and improve the productivity of solar greenhouse distillation. In the present work, emphasis has been placed on the study of a single slope solar distiller having as dimension 50 × 50 cm, in the thickness of the impure water is 1 cm. Natural sand dunes from the El Oued South region of Algeria have been tested as a factor of efficiency improvement. A layer of this sand was deposited on the bottom of the distiller covering the whole surface on which the submit water is emerged. The results show that the productivity of distilled water has unfortunately decreased by 1.46 times.
Study of the aerodynamic structure around a NACA6409 Aairfoil rotor
(جامعة الوادي - university of el oued, 2017-04-11) Gouiaa, Saoussane; Ameni, Ameni; Driss, Zied; Ben Amira, Bilel
The multi-copters are one of the important aircrafts in the world because they are used in both military and civil application. The problem of these aircrafts is the low efficiency of its propellers. That’s why, it is necessary to study the aerodynamic structure around every rotor. In this paper, a computer simulation has been done to study the aerodynamic structure around a NACA 6409 airfoil rotor. The numerical model is based on the resolution of the Navier - Stockes equations with a standard k-ε model. Then, the finite volume discretization of these equations leads to solve it. The local characteristics of the aerodynamic structure are extracted using the software Solidworks Flow Simulation and the validation is done with comparison with anterior result of Alexandrov [1].
Sustainable potable water production from conventional solar still during the winter season at Algerian dry areas: energy and exergy analysis
(Springer International Publishing, 2020-10-13) Attia, Mohammed El Hadi; Karthick, A; Muthu Manokar, A; Driss, Zied; Kabeel, Abd Elnaby; Sathyamurthy, Ravishankar; Sharifpur, Mohsen
The Algeria Sahara sufers from the scarcity of drinking water. Solar distillation is one of the simplest and generally inexpensive techniques to solve this problem. However, a second problem arises; this is low productivity in winter. The objective of this study is to overcome this difculty by modifying the experimental setup by adding nanoparticles that compensate for the weak solar radiation in winter. The experimental results show that the daily productivity of conventional solar still in summer is 3.5 kg m−2 and in winter is 2.2 kg m−2. Similarly conventional solar still with CuO nanoparticles in winter is 3 kg/m2 per day. The productivity of the conventional solar still without CuO nanoparticles in summer is best as compared to others. When comparing productivity during the winter season, it is found that the productivity of the modifed distillery was 1.4 times better than the productivity of the unmodifed distillery. The daily exergy efciency of the conventional solar still in summer and winter is equal to 1.2 and 1.58%, respectively. The use of CuO nanoparticles in winter season has exergy efciency equal to 2.41%. The daily exergy efciency of the solar still was increased by 52.5% when using CuO nanoparticles in the winter season