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var str = 'Numerical analysis of a latent thermal energy storage unit using two phase change materials with different melting temperatures';
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]]>
Latent thermal energy storage]]>
Phase change materials]]>
Storage rate]]>
Energy stored]]>
Numerical simulation]]>
Enthalpy method]]>
This study presents a mathematical model based on the enthalpy method for the transient thermal behavior of a shell-and-tube latent thermal energy storage (LTES) unit using two kinds of phase change materials (PCMs) named PCM1 and PCM2, with different melting temperatures. Numerical simulations are carried out to investigate the effects of heat transfer fluid (HTF) inlet temperatures on the unsteady temperatures and melting fractions evolution of PCM1 and PCM2 as well as the unsteady total energy stored evolution in different zone of PCMs. Charging process was studied numerically under three different HTF inlet temperatures above the melting point of the PCMs. The results shows that melting rates of PCM2 are the fastest and that of PCM1 are the slowest, the PCM2 temperature and melting fraction evolution changes rapidly with time from the start of heating process passing through the phase change period to the end of charging process. It is also found that the total energy stored gradually increases from minimum value which define the beginning of the charging cycle to maximum value defined the end of the cycle. The maximum total energy stored is observed in PCM1 with high melting temperature and high latent heats of fusion. The effects of HTF inlet temperature on the total energy stored show that heat storage capacity is large when the temperature difference between the HTF inlet temperature and the melting point of PCMs is large.]]>
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var str = 'Benmoussa, Fouzi';
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]]>
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var str = 'Benmoussa, Hocine';
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]]>
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var str = 'Benzaoui, Ahmed';
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]]>
Journal of Renewable Energies; Vol. 19 No. 3 (2016): Volume 19 (Regular); 333 -343]]>
Journal of Renewable Energies; Vol. 19 No 3 (2016): Volume 19 (Regular); 333 -343]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i3]]>
Renewable Energy Development Center]]>
2023-10-17]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/572/1255]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/572]]>
10.54966/jreen.v19i3.572]]>
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var str = 'DSP based space vector PWM control for solar electric vehicle';
document.write(linkifyHtml(str, options));
]]>
Solar electric vehicle]]>
Induction motor]]>
SVPWM method]]>
V/F control]]>
DSP processor]]>
IRAMY inverter]]>
Solar Electric Vehicles (SEV) are considered the future vehicles to solve the issues of air pollution, global warming, and the rapid decreases of the petroleum resources facing the current transportation technology. However, SEV are still facing important technical obstacles to overcome. They include batteries energy storage capacity, charging times, efficiency of the solar panels and electrical propulsion systems. Solving any of those problems and electric vehicles will compete-complement the internal combustion engines vehicles. In the present work, we propose an electrical propulsion system based on three phase induction motor in order to obtain the desired speed and torque with less power loss. Because of the need to lightweight nature, small volume, low cost, less maintenance and high efficiency system, a three phase squirrel cage induction motor (IM) is selected in the electrical propulsion system. The IM is fed from three phase inverter operated by a constant V/F control method and Space Vector Pulse Width Modulation (SVPWM) algorithm. The proposed control strategy has been implemented on the texas instruments TM320F2812 Digital Signal Processor (DSP) to generate SVPWM signal needed to trigger the gates of IGBT based inverter. The inverter used in this work is a three phase inverter IRAMY20UP60B type. The experimental results show the ability of the proposed control strategy to generate a three-phase sine wave signal with desired frequency. The proposed control strategy is experimented on a locally manufactured EV prototype. The results show that the EV prototype can be propelled to speed up to 60km/h under different road conditions.]]>
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var str = 'Saidi, Hemza';
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]]>
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var str = 'Taleb, Rachid';
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]]>
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var str = 'Mansour, Noureddine';
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]]>
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var str = 'Midoun, Abdelhamid';
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]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 321 - 331]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 321 - 331]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Renewable Energy Development Center]]>
2023-10-17]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/571/1254]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/571]]>
10.54966/jreen.v19i2.571]]>
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var str = 'Phosphorus emitter profile control for silicon solar cell using the doss diffusion technique';
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]]>
Doping]]>
Silicon]]>
Emitter]]>
Dead layer]]>
Residual diffusion oxide]]>
The Doped Oxide Solid Source (DOSS) diffusion technique is well suited for fine-tuning of the surface concentration. The dopant surface concentration is important during phosphorus emitter diffusion due to the opposite requirements of a lowly doped emitter for good blue response and a sufficiently high surface concentration for a good ohmic contact. The sources are made in the laboratory using the standard POCl3 diffusion technique. DOSS Diffusions were carried out in the temperature range 850-1050°C using sources with different doping levels obtained by varying the POCl3 partial pressure from 0.004 % to 4.28 %. The electrical profiles were measured using the Stripping Hall profiling technique. Phosphorus diffusion profiles with the complete elimination of the dead layer have been obtained over a large range of source concentrations for all investigated diffusion temperatures. The residual diffusion oxide thickness increased with both temperature and source doping level within the range 7.5-30 nm. XPS profiling indicated that the composition of the residual glass was a mixture of P2O5 and SiO2.]]>
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var str = 'Chaoui, Rachid';
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]]>
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var str = 'Mahmoudi, Bedra';
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]]>
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var str = 'Messaoud, Abdelghani';
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]]>
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var str = 'Si Ahmed, Yasmina';
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]]>
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var str = 'Mefoued, Amine';
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]]>
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var str = 'Mahmoudi, Brahim';
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]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 303 – 309]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 303 – 309]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Renewable Energy Development Center]]>
2023-10-17]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/569/1253]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/569]]>
10.54966/jreen.v19i2.569]]>
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var str = 'Estimation statistique des données du vent à partir de la distribution de Weibull en vue d’une prédiction de la production de l’énergie électrique d’origine éolienne sur le Mont Tinguelin à Garoua dans le Nord Cameroun';
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]]>
Potentiel éolien]]>
Distribution de Weibull]]>
Aérogénérateurs]]>
Production d’électricité]]>
Mont Tinguelin]]>
La situation énergétique au Nord Cameroun est caractérisée par un faible taux d’accès à l’électricité. Au vu du potentiel énergétique éolien existant sur le Mont Tinguelin, son utilisation pour le développement de l’énergie électrique de la région semble favorable. Une solution avantageuse pour le Nord Cameroun est la récupération et la transformation de l’énergie éolienne en énergie électrique. Ce travail présente à partir des données obtenues auprès de l’ASECNA et par RETScree.net en utilisant la distribution de Weibull [1], la densité de distribution du vent et exprime l’estimation statistique du potentiel énergétique éolien à des différentes altitudes sur le Mont Tinguelin à Garoua. Ensuite, la direction du vent est établie pour l’orientation des éoliennes dans le site. Enfin, l’évaluation de la prédiction de l’énergie électrique produite est faite tout en nous appuyant sur la prise en compte des choix judicieux des aérogénérateurs et de leurs facteurs de charge.]]>
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var str = 'Nsouandélé, Jean Luc';
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]]>
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var str = 'Kidmo Kaoga, Dieudonné';
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]]>
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var str = 'Djetouda, Stephane Mbang';
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]]>
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var str = 'Djongyang, Noël';
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]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 291 - 301]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 291 - 301]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Renewable Energy Development Center]]>
2023-10-17]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/568/1252]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/568]]>
10.54966/jreen.v19i2.568]]>
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var str = 'Estimation and monitoring of grid connected PV system generation';
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]]>
Photovoltaic systems]]>
Parameter identification]]>
Modelling]]>
Simulation]]>
This paper presents a new method to identify the operating performance parameters of a photovoltaic (PV) generator and a grid connected inverter. This method has been applied to the behavior modeling and simulation of the grid connected PV system at the Centre de Developpement des Energies Renouvelables (CDER) in Algeria. The PV module (PVM) parameters has been identified in static with outdoor measurements of I-V curves in order to model the PV array generation. Using the Linear Reoriented Coordinates Method (LRCM), the prediction of maximum power point (MPP) of the PV array has been performed without using complicate approximations or Taylor series. In order to estimate the ac output power, a PV inverter performance model based on empirical relationship was used. However, an accurate identification of the inverter performance parameters is performed using an optimization algorithm, named Levenberg-Marquardt (LM) algorithm, and a moutput current and voltage. The simulation results were achieved through MATLAB/Simulink environment, for the setting and the testing of the models. The results show a good agreement between the measured and estimated results based on the identified parameters. The integration of the proposed method and the presented model present a simple way to estimate the expected system performance with a high degree of accuracy. This solution allows a development of automatic supervision, energy generation prediction and fault detection procedure.]]>
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var str = 'Bouchakour, Salim';
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]]>
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var str = 'Tahour, Ahmed';
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]]>
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var str = 'Abdeladim, Kamel';
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]]>
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var str = 'Sayah, Houari';
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]]>
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var str = 'Hadj Arab, Amar';
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]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 277 - 290]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 277 - 290]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Renewable Energy Development Center]]>
2023-10-17]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/567/1251]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/567]]>
10.54966/jreen.v19i2.567]]>
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var str = 'Modélisation et dimensionnement d’un système hybride Eolien/ Photovoltaïque autonome';
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]]>
Système hybride (éolien/solaire)]]>
Optimisation]]>
Méthode de la DPSP]]>
Capacité de stockage]]>
Une méthodologie d’optimisation et de dimensionnement des systèmes hybrides photovoltaïque/éolien avec batteries de stockage est présentée dans ce papier. Cette méthodologie est basée sur les concepts de la probabilité de perte d’énergie (DPSP) comme critère technique et du coût du kilowattheure minimal comme critère économique. La simulation est effectuée sur une période d’analyse d’une année, en utilisant les données horaires de l’irradiation solaire sur le plan horizontal, de la vitesse du vent et de la température ambiante enregistrées au sein du CDER, (Centre de Développement des Energies Renouvelables). Ces données nous ont permis de calculer la puissance horaire produite conjointement par l’aérogénérateur et le générateur photovoltaïque et ce, sur la même période d’analyse. Un profil de consommation journalier type a été adopté, il est supposé identique pour tous les jours de l’année et correspond au profil de consommation rencontré généralement dans les sites isolés.]]>
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var str = 'Derai, Sid Ali';
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]]>
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var str = 'Kaabeche, Abdelhamid';
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]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 265 - 276]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 265 - 276]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Renewable Energy Development Center]]>
2023-10-17]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/566/1250]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/566]]>
10.54966/jreen.v19i2.566]]>
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var str = 'Experimental analysis of solar drying kinetic of Algerian bay leaves (Laurus nobilis L.)';
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]]>
Indirect solar dryer]]>
Mass transfer]]>
Drying kinetics]]>
Modeling]]>
Characteristic curve]]>
In this work, we present an experimental study of thin layer solar drying kinetics of Algerian bay leaves. The experiments were carried out in an indirect solar dryer operating in forced convection fitted with an auxiliary heater with aero controlled conditions. Bay leaves were dried at a relative intervals of relative air humidity, the air temperatures and air velocities ranging from 21 to 40 %, 40 to 60 °C and 0.25 to 0.8 m/s, respectively. 95 % of the water content of the product was reduced for a temperature of 60 °C. The experimental curves obtained show the presence of a decreasing drying rate. This drying rate increases with the increase of air temperature and varies inversely with the drying time. Five empirical mathematical models were used to analyze experimental data of moisture ratio over time. The model of Wang and Singh was the best prediction of drying curves with a correlation coefficient, chi-square, and an average relative error ranging respectively from 0.993 to 0.999, from 0.011 to 0.042 and 2.748 to 16.472 %. The curves obtained for all drying conditions were used for the determination of the drying characteristic curve. This latter has allowed us to empirically determine the equation of bay leaves drying rate which has been interpreted by a three degree polynomial. In addition, the diffusivity of the moisture content of bay leaves was determined from the analytical solution of the Fick’s equation. The values range from 0.9×10-9 to 6.1×10-9 m2/s with an activation energy that varies from 47.015 to 64.957 kJ/mole.]]>
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var str = 'Ouafi, Nesrine';
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]]>
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var str = 'Benaouda, Noureddine';
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]]>
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Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 251 - 264]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 251 - 264]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Renewable Energy Development Center]]>
2023-10-17]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/565/1249]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/565]]>
10.54966/jreen.v19i2.565]]>
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var str = 'أثر إدارة الاجتماعات في اتخاذ القرارات بالتطبيق على كلية صافات للعلوم والتكنولوجيا في الفترة من 2021-2022م';
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var str = 'Low-Reynolds-number turbulent forced-convection flow over graded baffle plates';
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دارة الاجتماعات، مشاركة الأفراد، كيفية الاجتماعات، اتخاذ القرارات]]>
CFD]]>
Graded baffle]]>
In-line arrangement]]>
Rectangular channel]]>
Steady state]]>
Turbulent flow]]>
هدفت الدراسة للتعرف على العلاقة بين إدارة الاجتماعات واتخاذ القرارات ودراسة تجربة كلية صافات للعلوم والتقانة لإدارة الاجتماعات في اتخاذ القرارات. حيث تمثلت مشكلة البحث في السؤال الرئيس: إلى أي مدى تؤثر إدارة الاجتماعات في اتخاذ القرارات؟ كما جاءت الفرضية الرئيسة في أنه توجد علاقة ذات دلالة إحصائية بين إدارة الاجتماعات واتخاذ القرارات. اتبع الباحث المنهج الوصفي التحليلي والتاريخي واسلوب دراسة الحالة. توصلت الدراسة لعدة نتائج أهمها: تتم دعوة المشاركين للاجتماعات بصفة رسمية بنسبة بلغت 91.3% ولا تنتهي الاجتماعات في الوقت المحدد لها. كما أوصت الدراسة بعدة توصيات أهمها: المزيد من دراسة القرارات قبل اتخاذها وضرورة اتخاذ القرارات بالكلية بصورة جماعية.]]>
The thermo-hydraulic behaviors of turbulent forced-convection heat transfer flow over a rectangular cross section baffled channel are numerically examined in various graded baffle plate ratio configurations ‘GBR = 0.10, 0.11, 0.12, 0.13, 0.14, and 0.15) at different Reynolds numbers, ranging from 12,000 to 32,000. The governing equations that describe the flow are integrated by the finite volumes method, in two dimensions, employing the Commercial CFD software FLUENT 6.3 with low-Reynolds-number k-E model to describe the turbulence. The velocity and pressure terms of momentum equations are solved with SIMPLE-algorithm. In particular, axial velocity, turbulence intensity, pressure, and temperature fields, average Nusselt number and friction loss are obtained. The numerical runs are carried out for different values of Reynolds numbers and graded baffle ratios at constant wall temperature condition along the top and bottom walls. Results were compared with available experimental data from the literature and good agreement is obtained.]]>
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Manar Elsharq Journal for Management and Commerce Studies; مجلد 1 عدد 3 (2023): Manar Elsharq Journal for Management and Commerce Studies; 47-59]]>
Manar Elsharq Journal for Management and Commerce Studies; Vol. 1 No. 3 (2023): Manar Elsharq Journal for Management and Commerce Studies; 47-59]]>
2959-0655]]>
10.56961/mejmcs.v1i3]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 235 – 250]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 235 – 250]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Manar Elsharq for Studies and Research]]>
Renewable Energy Development Center]]>
2023-11-12]]>
2023-10-17]]>
الحقوق الفكرية (c) 2023 Manar Elsharq Journal for Management and Commerce Studies]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
http://meijournals.com/ara/index.php/mejcms/article/view/499/491]]>
https://revue.cder.dz/index.php/rer/article/view/564/1248]]>
application/pdf]]>
application/pdf]]>
eng]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
مؤلَّف محكَّم]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
http://meijournals.com/ara/index.php/mejcms/article/view/499]]>
10.56961/mejmcs.v1i3.499]]>
https://revue.cder.dz/index.php/rer/article/view/564]]>
10.54966/jreen.v19i2.564]]>
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var str = 'دور براعة الاستكشاف كمتغير وسيط في العلاقة بين المعرفة الضمنية ورشاقة الاستجابة إلى السوق: دراسة ميدانية بالبنوك التجارية الحكومية في جمهورية مصر العربية';
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var str = 'Etude du temps d’amorçage d’une génératrice asynchrone auto-excitée par la méthode de plan d’expériences';
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رشاقة الاستجابة الى السوق، المعرفة الضمنية، براعة الاستكشاف]]>
Asynchronous generator]]>
Boot time]]>
Design of experiments]]>
Residual]]>
هدفت الدراسة إلى توضيح العلاقة بين المعرفة الضمنية ورشاقة الاستجابة الى السوق في البنوك محل الدراسة، ودراسة التأثير المباشر لبراعة الاستكشاف على رشاقة الاستجابة الى السوق في البنوك محل الدراسة، بالإضافة الى تحديد التأثير غير المباشر لبراعة الاستكشاف في العلاقة بين المعرفة الضمنية ورشاقة الاستجابة الى السوق في البنوك محل الدراسة وقد خلصت الدراسة إلى وجود علاقة ارتباط وأثر إيجابي بين المعرفة الضمنية وتحقيق الرشاقة الاستجابة الى السوق، كما توجد علاقة ارتباط وأثر إيجابي بين المعرفة الضمنية وتحقيق براعة الاستكشاف. كما أوصت بأنه يجب على إدارة المؤسسة تطوير نظم وآليات الإنتاج من أجل التوسع في تشكيلة المنتجات بالشكل الذي يمكن أن يساهم في زيادة كفاءة وبراعة استغلال الفرص في كافة الأنشطة والمجالات الإنتاجية، بالإضافة إلى ضرورة استثمار الأفراد ذوي المعارف المهنية المتميزة والطموحة وتوليتهم مراكز ومسئوليات جديدة تحت إشراف إداراتهم في بداية الأمر.]]>
Ce papier présente une étude expérimentale portant sur une génératrice asynchrone triphasée de 0.37 kW destinée à la production d’électricité en zones rurales. Le but du travail est d’étudier les effets des facteurs: capacité, vitesse et rémanent, permettant un temps d’amorçage minimal (< à 700 ms), tout en maintenant la tension et la fréquence dans les limites admissibles. La méthode adoptée est celle de plan d’expériences factoriel 2n qui permet de mettre en évidence et à quantifier l’influence de ces facteurs. Le logiciel Minitab aide à l’analyse des données obtenues. De cette analyse, il ressort que le temps d’amorçage subit l’influence simultanée des facteurs suscités. Les résultats de cette étude montrent que la valeur du rémanent, non spécifiée dans les travaux antérieurs influe significativement sur le temps d’amorçage de la génératrice asynchrone.]]>
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var str = 'يسر على';
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var str = 'منى شريف';
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var str = 'Yembi, Jean Paul';
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var str = 'Moukengué Imano, Adolphe';
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]]>
Manar Elsharq Journal for Management and Commerce Studies; مجلد 1 عدد 3 (2023): Manar Elsharq Journal for Management and Commerce Studies; 32-46]]>
Manar Elsharq Journal for Management and Commerce Studies; Vol. 1 No. 3 (2023): Manar Elsharq Journal for Management and Commerce Studies; 32-46]]>
2959-0655]]>
10.56961/mejmcs.v1i3]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 225 - 234]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 225 - 234]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Manar Elsharq for Studies and Research]]>
Renewable Energy Development Center]]>
2023-11-12]]>
2023-10-17]]>
الحقوق الفكرية (c) 2023 Manar Elsharq Journal for Management and Commerce Studies]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
http://meijournals.com/ara/index.php/mejcms/article/view/498/490]]>
https://revue.cder.dz/index.php/rer/article/view/563/1247]]>
application/pdf]]>
application/pdf]]>
eng]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
مؤلَّف محكَّم]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
http://meijournals.com/ara/index.php/mejcms/article/view/498]]>
10.56961/mejmcs.v1i3.498]]>
https://revue.cder.dz/index.php/rer/article/view/563]]>
10.54966/jreen.v19i2.563]]>
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var str = 'أثر إدارة الوقت على أداء العاملين: دراسة تطبيقية على عينة من العاملون بجامعة البطانة';
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var str = 'Experimental investigation of thermal performance evaluation and thermodynamic analysis of domestic box type solar cooker with inclined aperture area';
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إدارة الوقت، أداء العاملين , جامعة البطانة]]>
Solar radiation]]>
Box solar cooker]]>
Figure of merits]]>
Energy and exergy efficiencies]]>
Inclined aperture area]]>
تناولت الدراسة أثر إدارة الوقت على أداء العاملين بجامعة البطانة، الهدف من الدراسة التعرف على أثر تخطيط و تنظيم و الرقابة علي الوقت على أداء العاملين ، أتبعت الدراسة المنهج الوصفي التحليلي باعتباره الأسلوب الأنسب للدراسة، نتج عن الدراسة عدة نتائج منها:عدم وجود علاقة ذات دلالة إحصائية بين تخطيط الوقت وأداء العاملين، وجود علاقة ذات دلالة إحصائية بين تنظيم الوقت و أداء العاملين، وجود علاقة ذات دلالة إحصائية بين الرقابة على الوقت وأداء العاملين،أوصت الدراسة بعدد من التوصيات أهمها:ضرورة الاهتمام بالتخطيط السليم للوقت لأن التخطيط يقوم على هدف محدد يُراد تحقيقه عن طريق التنبؤ بالمستقبل من خلال التدبير السليم الذي يرمي إلى مواجهة هذا المستقبل بخطط منظمة سعياً لتحقيق أداء أفضل من طرف العاملين، القيام بمهمة ممارسة الرقابة على الوقت لأنها تُمثل الأداة التي يتحقق من خلالها قياس مدى تطابق الأداء المتحقق من طرف العاملين لما هو مخطط بالفعل بافتراض أن ما هو مخطط عند تنفيذه يمثل تحقيق الأهداف.]]>
In this paper, the thermal performances of a box solar cooker were rated with F1 and F2 parameters as per Mullick’s procedure [1], the efficiency of the cooker was evaluated using energy and exergy analysis. The solar cooker was designed with an inclined aperture area, realized and experimentally tested at Applied Research Unit on Renewable Energies of Ghardaïa (32.39 °N, 3.78 °E, 463 m), Algeria. The developed cooker is equipped with one reflector mirror on its lid. The experiments have been carried out with the cooker empty, filled with one or two liters of water from 08:00 to 15:00 solar time, the thermal profiles of various components of the cooker were assessed at Ghardaïa site Sahara climatic conditions on clear days in both winter and summer months. According to the values of two figures of merits suggested by International Standards and evaluated by the experimental studies, the configuration with an inclined aperture area of the cooker resulted in good cooking performances, especially in winter when the sun’s elevation is low; keeping the realized cooker performances in range of the international standard tests. The results of this study indicate also that the average daily energy and exergy efficiency of the realized cooker was 16.2 % and 0.90 % respectively, during the experimental period, which indicate a significant difference between the results of energy and exergy analyses. Thus developing such a box solar cooker can improve the efficiency of the design and use a position of the system to prepare food in a shorter time.]]>
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var str = 'أبوبكر عامر محمد لقمة';
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var str = 'محمد مختار إبراهيم أحمد';
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var str = 'Yettou, Fatiha';
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var str = 'Panwar, Narayan Lal';
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var str = 'Malek, Ali';
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var str = 'Azoui, Boubekeur';
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Manar Elsharq Journal for Management and Commerce Studies; مجلد 1 عدد 3 (2023): Manar Elsharq Journal for Management and Commerce Studies; 25-31]]>
Manar Elsharq Journal for Management and Commerce Studies; Vol. 1 No. 3 (2023): Manar Elsharq Journal for Management and Commerce Studies; 25-31]]>
2959-0655]]>
10.56961/mejmcs.v1i3]]>
Journal of Renewable Energies; Vol. 19 No. 2 (2016): Volume 19 (Regular); 211 – 224]]>
Journal of Renewable Energies; Vol. 19 No 2 (2016): Volume 19 (Regular); 211 – 224]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v19i2]]>
Manar Elsharq for Studies and Research]]>
Renewable Energy Development Center]]>
2023-11-12]]>
2023-10-17]]>
الحقوق الفكرية (c) 2023 Manar Elsharq Journal for Management and Commerce Studies]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
http://meijournals.com/ara/index.php/mejcms/article/view/497/489]]>
https://revue.cder.dz/index.php/rer/article/view/562/1246]]>
application/pdf]]>
application/pdf]]>
eng]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
مؤلَّف محكَّم]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
http://meijournals.com/ara/index.php/mejcms/article/view/497]]>
10.56961/mejmcs.v1i3.497]]>
https://revue.cder.dz/index.php/rer/article/view/562]]>
10.54966/jreen.v19i2.562]]>