Browsing by Author "Khechekhouche, Abderrahmane"

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Amélioration d’un distillateur solaire plan à effet de serre dans la région sud-est de l’Algérie
(Universty of Eloued جامعة الشهيد حمة لخضرالوادي, 2020) Khechekhouche, Abderrahmane
Abstract The Oued region (southeast of Algeria) has great groundwater potential, but unfortunately it is often polluted. This water causes health problems in the bones, teeth and kidneys. Solar distillation seems an environmental, ecological and low-cost solution to transform this water into drinking water. Our experimental study sought to use simple techniques that can improve the productivity of conventional solar stills. According to the results, productivity is improved between 1.42 to 2.75 times. An economic study shows that this type of solar station reimburses the investment amount between 30 and 60 days.خلاصة تتمتع منطقة الواد (جنوب شرق الجزائر) بإمكانيات كبيرة للمياه الجوفية ، لكن للأسف غالبًا ما تكون ملوثة. يسبب هذا الماء مشاكل صحية في العظام والأسنان والكلى. يبدو التقطير الشمسي حلاً بيئيًا وبيئيًا ومنخفض التكلفة للتحول هذه المياه في مياه الشرب. سعت دراستنا التجريبية إلى استخدام تقنيات بسيطة يمكن أن تحسن إنتاجية اللقطات الشمسية التقليدية. وفقا للنتائج، تم تحسين الإنتاجية بين 1.42 إلى 2.75 مرة. تظهر دراسة اقتصادية أن هذا نوع محطة الطاقة الشمسية يعوض مبلغ الاستثمار ما بين 30 و 60 يوما.
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
Improvement of greenhouse production technique by geothermal energy
(University of Eloued جامعة الوادي, 2019-03-06) Khechekhouche, Abderrahmane; Khechekhouche, El Amine
Improvement of Solar Distiller Productivity by a Black Metallic Plate of Zinc as a Thermal Storage Material
(ASTM International, 2021-03-01) Khechekhouche, Abderrahmane; Ben Haoua, Boubaker; Attia, Mohammed El Hadi; El-Maghlany, Wael M
The lack of drinking water is a real global problem. Transforming polluted water into freshwater is another problem. Solar distillation seems a simple and economical solution to this problem, but the yield of a solar still is low, and this poses another problem. One of the best ways to improve the productivity of freshwater from solar energy is to incorporate sensible heat energy storage materials; i.e., the temperature elevation of a material allows for the storage of energy, and that is exactly the purpose of our work. Two similar solar distillers were exposed to the sun in May 2017 under the same weather conditions. Distiller Dc is retained as a reference and distiller Ds contains in its basin a black plate of zinc 48 by 48 cm with a thickness of 0.2 cm. This plate is used as a sensitive thermal storage material to improve the productivity of our device. The results of this simple and inexpensive technique have improved the productivity of distiller Ds by 1.54 times compared with the conventional Dc still. Thus, this technique increases the productivity of the distiller and participates in solving a technical problem affecting the solar still.
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 a new earth-air heat exchanger configuration designed for Sahara climates
(جامعة الوادي - university of el oued, 2020-06-19) Hadjadj, Abdessamia; Attia, Abbes; Khechekhouche, Abderrahmane; Naili, Nabiha; Bendjenid, Bachir
Thermal performance for cooling and heating in the building can be achieved by the novel shape of the earth–air heat exchanger (EAHE). In a heavily populated area such as City, Due to the limited ground space. EAHE systems are rarely used, for most residential andcommercial utilization.This paper presents a numerical investigation of the thermal performance of a spiral-shaped configuration Spiral Earth to Air Heat Exchanger SEAHE intended for the summer cooling inhot and arid regions of Algeria. A parametric analysis of the SEAHE has been performed toinvestigate the effect of diameter, depth, pipe length and of airflow rate on the outlet air in theexchanger. Results show that the specific heat exchange is used to cool in an arid zone (south-east of Algeria). When the ambient temperature varies between 40°C and 45 °C, the coolingtemperature varies between 25°C and 29 °C. Temperature difference inlet and outlet airexchanger 18°C, these values are quite acceptable with for cooling the building.
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 of a wastewater treatment plant in south-eastern Algeria
(جامعة الوادي - university of el oued, 2020-11-07) Khechekhouche, Abderrahmane; Bouchemal, Fattoum; Kaddour, Zineb; Salim, Khechana; Miloudi, Abdelmonem
The experimental study was carried out on an urban wastewater purification station located in the region of El Oued -Kounine- in south-eastern Algeria. During 6 months, samples were taken every month to study the Physico-chemical parameters of this station. Monthly monitoring of SS, COD, BOD5 was made from September 2017 to February 2018 and the results obtained show that the average elimination rates were 77.76, 74.10 and 80% respectively for BOD5, DCO and SS. The average of the ratio COD/BOD5 during the 6 months of follow-up is equal to 2.9.
Performance Simulation of a Solar-Driven Ejector Air Conditioning System
(University of Eloued جامعة الوادي, 2018-12-10) Ghodbane, Mokhtar; Boumeddane, Boussad; Khechekhouche, Abderrahmane
For proper comprehend the comportment and to define the parameters of a solar-driven ejector air conditioning system at low or medium temperature; a dynamic model depends on the principles of conservation, the momentum mass and energy is developed. For this purpose, the thermodynamic characteristics of the liquid and vapor refrigerant were identified using the Engineering Equation Solver EES software. Linear Fresnel Reflector (LFR) has been used as a tool to convert solar energy into thermal energy. The water (R718) was used as a refrigerant. The performance of the ejector air conditioning system was compared as a function of the operating parameters of the subsystem. The thermal efficiency of the Fresnel linear concentrator was as high as 31.514 %, and the overall thermal performance of the machine (STR) was as high as 20.764 %. The results obtained during this study are very encouraging. This technique can be used for air conditioning in desert areas in southern Algeria, where fossil energy (petroleum, gas, etc.) is extracted and produced in various types.
Phytochemical investigation, antibacterial and antioxidant activities of Sideritis incana L extracts
(جامعة الوادي - university of el oued, 2021-10-21) Sefaoui, Asma Khelassi; Zaoui, Manel; Daouadji, Djelloul; mekhelfi, Tarak; Nailic, Imane; Zaiter, Lahcen; Benarima, Hanane; Khechekhouche, Abderrahmane
According to the phytochemical investigation conducted on the Sideritis incana L. plant, it was found to be rich in secondary metabolites, in particular tannins, flavonoids and alkaloids, based on what we found by preliminary tests for chemical constituents. The content of phenols, flavonoids was estimated by spectrophotometric methods. Also, the antioxidant activities of the extracts of Sideritis incana L were investigated by DPPH scavenging, and phosphomolybdenum method. The results of the quantitative estimation of total phenols showed the highest content in chloroform where it was estimated 585.64 mg GAE /g followed by n-butanol 282.22 mg GAE /g and the lowest content recorded in petroleum ether 17.32 mg GAE /g. The results of the quantitative evaluation of flavonoids showed that petroleum ether fraction contained an excess of flavonoids in the unusual results. For the DPPH assay, n-butanol fraction showed the best result followed by the ethyl acetate fraction and finally chloroform fraction the lowest activities ( IC50 = 0.0534, 0.071 and 0.0756 μg/ml) respectively. Finally, result of antibacterial activity of S.incana showed that the chloroform extract gave the highest diameter inhibition among all extracts (13 mm) at a concentration of 50 mg/ml against Escherichia coli ATCC25921 and Staphylococcus aureus ATCC25923
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 a solar air conditioning system with ejector
(جامعة الوادي - university of el oued, 2020-04-10) Ghodbane, ,MokhtarMokhtar; Boumeddane, Boussad; Khechekhouche, Abderrahmane; Benmenine, Djamel
Air conditioning is one of the indispensable conditions of well-being in human life, so the face of this research to provide this basic necessity in remote areas and in desert places far from power grids. To achieve this goal, solar air conditioning has been adopted, where the compressor was replaced by an ejector, a parabolic trough solar collector coupled with a thermal generator and a small pump; this means that the solar air conditioner does not need a huge amount of electrical energy to operate. This paper is studding the optical and thermal efficiency of the solar collector used as a solar thermal generator, refrigeration subsystem performance (COPejc) and system thermal ratio of the studied air conditioner, where the cooling load is estimated at 18 kW. This work has allowed to acquire very important knowledge about R718 ejector solar air conditioners. Bouzaréah was chosen as the region to conduct this numerical study on June 11th, 2018. Regarding performance of the studied air conditioning subsystem (COPejc) is 0.6235. As for the PTC solar reflector subsystem, its mean optical performance is 75.74 % and its mean thermal performance is 65.01 %. Regarding the overall performance of the studied air conditioner, its mean value is 0.407
Thermal conductivity between the flash laser and the thermic method
(University of Eloued جامعة الوادي, 2018-02-05) Khechekhouche, Abderrahmane; Attia, Mohamed El hadi; Benhissen, Nacer Eddine
The flash laser method was proposed by Parker Butler in 1961. It is the most popular method for measuring the thermal diffusivity of solids or Thermal conductivity. The thermal conductivity (λ) is a characteristic of each material. It is expressed in W/mK and it is only valid for homogeneous materials. There are several methods for measuring this coefficient. The ratio between a temperature difference and the resulting thermal flux density, i.e., thermal resistance, can be determined in any case correctly, irrespective of the mechanism of heat transfer through it. The best measurement accuracies (better than 1%) are obtained by the method of the hot plate kept. In the simpler case where the heat transfer is reduced to a single mode, that of conduction (steady state). The λ of the test piece can be calculated if its geometry and temperature differences are known. In this work we will quote and compare the Flash Laser method and the thermal method.
Traditional solar distiller improvement by a single external refractor under the climatic conditions of the El-Oued region, Algeria
(Desalin Water Treat, 2020-02-01) Khechekhouche, Abderrahmane; Kabeel, AE; Benhaoua, B; Attia, Mohammed El Hadi; El-Said, Emad MS
Desalination is now successfully practiced in many countries as drinking water supply has become a growing problem in most parts of the world. Algeria, like the Maghreb countries, has generally adopted two desalination processes (membrane processes and distillation processes which require a phase change, evaporation/condensation), the latter method is subject of our study. An experimental study was made on two similar stills with a single slope, size 1 m × 1 m, the first distiller D1 is used as a control and the second distiller D2 has a simple external mirror glued to its backlog. The same experience has been done in different climates with improvement results ranging from 9% to 21%. In our case, a complete study was concerning the improvement, the efficiency, the investment and finally the error analysis of the instrumentations that have not been done before. We obtained a very interesting improvement which varied between 42% and 45%, the efficiency is 35% and the recovery period of the sum invested is recovered in 23 d, which shows that this technique is more favorable under the climatic conditions of the West Southeast region of Algeria than elsewhere.
Traditional solar distiller improvement by a single external refractor under the climatic conditions of the El-Oued region, Algeria
(Desalination Publications, 2020-02-01) Khechekhouche, Abderrahmane; Kabeel, AE; Benhaoua, B; Attia, Mohammed El Hadi; MS El-Said, Emad
Desalination is now successfully practiced in many countries as drinking water supply has become a growing problem in most parts of the world. Algeria, like the Maghreb countries, has generally adopted two desalination processes (membrane processes and distillation processes which require a phase change, evaporation/condensation), the latter method is subject of our study. An experimental study was made on two similar stills with a single slope, size 1 m × 1 m, the first distiller D1 is used as a control and the second distiller D2 has a simple external mirror glued to its backlog. The same experience has been done in different climates with improvement results ranging from 9% to 21%. In our case, a complete study was concerning the improvement, the efficiency, the investment and finally the error analysis of the instrumentations that have not been done before. We obtained a very interesting improvement which varied between 42% and 45%, the efficiency is 35% and the recovery period of the sum invested is recovered in 23 d, which shows that this technique is more favorable under the climatic conditions of the West Southeast region of Algeria than elsewhere.