Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401Hybrid fuzzy logic controller for boot converter operating in pv energy system73786633610.21608/erjm.2017.66336ENH.A.MohamedElectrical Department, Faculty of Engineering, Menoufia, University,
Shebin El-Kom, EgypH.A.KhattabElectrical Department, Faculty of Engineering, Menoufia, University,
Shebin El-Kom, EgypA.MobarkaElectrical Department, Faculty of Engineering, Menoufia, University,
Shebin El-Kom, EgypG.A.MorsyElectrical Department, Faculty of Engineering, Menoufia, University,
Shebin El-Kom, EgypJournal Article20191225The demand for high efficiency DC/DC boost converters is increasing dramatically in many areas <br />of industrial applications especially for PV system to produce high voltage to meet the needs of the <br />load. Closed-loop systems are designed to automatically attain and keep the desired output <br />condition by comparing it with the actual condition. In this paper, Hybrid Proportional-Integral <br />Fuzzy Logic Controller (HPIFLC) is designed and implemented to control the duty cycle of <br />DC/DC boost converter. This combination of Proportional-Integral (PI) and Fuzzy Logic (FL) is <br />done to exploit the advantageous sides of both controllers to obtain better performance. The <br />system under consideration consists of a PV module connected to the load through a controlled <br />DC/DC boost converter. The mathematical model of the complete power system and the <br />simulation has been done using MATLAB/SIMULINK. Performance comparison between PI, FL, <br />and HPIFLC controllers have been carried out which emphasize that HPIFLC is superior to the <br />other controllers as rise time, settling time, overshoot and steady state error are reduced.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401Eight Switches Bridge Converter characteristics to operate the prushless DC motor of electric vehicles79856633710.21608/erjm.2017.66337ENMahmoud A.HassaninElectrical Engineering Department, Faculty of Engineering, Shebin El-Kom,
Minoufiya University, EgyptFathy E.Abdel-KaderElectrical Engineering Department, Faculty of Engineering, Shebin El-Kom,
Minoufiya University, EgyptSanaa I.AmerElectrical Engineering Department, Faculty of Engineering, Shebin El-Kom,
Minoufiya University, EgyptAhmed E.Abu-MoubarkaElectrical Engineering Department, Faculty of Engineering, Shebin El-Kom,
Minoufiya University, EgyptJournal Article20191225This paper is to investigate the performance of Brushless DC Motor (BLDCM) applied on Electric <br />Vehicle (EV). Eight Switches Bridge Converter (ESBC) is used to drive the BLDCM to increase <br />the system reliability. The performance characteristics of ESBC are tested at different operating <br />conditions. The performance characteristics of ESBC are introduced by MATLAB code (m-file). <br />An experimental setup is implemented for verifying the simulation analysis. A comparison <br />between the theoretical and experimental results confirms the validity of the simulation.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401COMPUTATIONAL STUDY OF TURBULENT EMULSION FLOW THROUGH CURVED DIFFUSERS87936633810.21608/erjm.2017.66338ENKamal A.IbrahimFaculty of Engineering, Menoufia University, EgyptMohamed E.Nour EldinMSc research student, College of Engineering and Technology, Arab Academy for Science, Technology and
Maritime TransportKhalid M.SaqrCollege of Engineering and Technology, Arab Academy for Science, Technology and Maritime TransportAhmed A.HanafyCollege of Engineering and Technology, Arab Academy for Science, Technology and Maritime TransportJournal Article20191225Emulsion flow is crucially important in numerous fluid mechanics and industrial applications. This paper investigates the flow structure and hydrodynamic parameters of emulsion flow in curved diffusers of rectangular cross section and different angles and curvature ratios. The work was undertaken using the general-purpose CFD package ANSYS FLUENT with proper verification and validation procedures. The CFD model utilized the turbulence model to close the RANS equation and a single phase fluid model. The emulsion flow was presented in the computational model via its physical properties assuming homogenous mixing between the primary and secondary fluid phases. The effects of Reynolds number and diffuser geometry on the hydrodynamic performance of the diffuser as well as the flow structure were investigated and discussed.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401SOURCE SIZE EFFECTS ON CAVITATION DAMAGE M. A. Hosien † and S. M. Selim951056633910.21608/erjm.2017.66339ENM. A.HosienMechanical Power Engineering Department, Faculty of Engineering, Menoufyia University, Shebin El-
Kom, EgyS. M.SelimMechanical Power Engineering Department, Faculty of Engineering, Menoufyia University, Shebin El-
Kom, EgyJournal Article20191225Cavitation is important as a consequence of its effects. Uncontrolled cavitation can produce serious erosion to all materials. In the light of the current world wide interest in the problem of cavitation damage prediction and scaling, it was decided to evaluate the effects of source size on the cavitation damage. For this purpose, an experimental study of the effect of source size on the weight loss rate in the steady–state zone of pure aluminum test specimens was conducted using three different shapes of cavitation inducer to represent the types of cavitation normally occur in practice. For each source shape seven sizes from 15 mm to 27 mm were used. The tests were performed in two separate groups, one at constant cavitation number and various flow velocities (24-42.5 m/s) and the other at constant flow velocity and different cavitation numbers (0.017-0.15)for each source size. The results showed that, for all flow conditions and source shapes and sizes, the weight loss rate ( ) increased up to blockage ratio (B) of about 0.5 and then decreased with increasing blockage ratio. Also the results indicated that the weight loss rate was proportional to the source size raised to two characteristic powers: , with positive index ( ) and , with negative index . The values of and were varied quite widely depending on the flow conditions, source shape and size and place of erosion. The magnitudes of and were varied from 1.88 to 5.09 and from -1.92 to -11.3, respectively. In addition, the results illustrated that the size exponent’s e1 and e2 were varied approximately exponentially with both the flow velocity and cavitation number. The values of flow velocity and cavitation number exponents were varied widely between cavitation source shape and place of erosion measurements. The results presented herein have proved that the effect of source size on cavitation damage is extremely complex and no general scaling laws can be established at present. Undoubtedly, further systematic studies should be carried outMenoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401COMPUTATIONAL AND EXPERIMENTAL STUDY ON THE WATER-JET PUMP PERFORMANCE UNDER DIFFERENT GEOMETRICAL AND OPERATIONAL PARAMETERS1071176634010.21608/erjm.2017.66340ENM.NasrMechanical Power Engineering Department, Faculty of Engineering, Menoufia University, Shebin El-Kom EgyptM.A.HosienMechanical Power Engineering Department, Faculty of Engineering, Menoufia University, Shebin El-Kom EgyptE.M.WahbaMechanical Power Engineering Department, Faculty of Engineering, Menoufia University, Shebin El-Kom EgyptA.A.A.ShehaRotating Equipment Engineer, Petrogulfmisr Oil Company, 10, St. 250 Sarayat El-Maadi, Cairo, EgyptJournal Article20191225The aim of the present study is to investigate the performance of jet pump. The effect of geometrical and operational parameters on the jet pumps efficiency were determined numerically and experimentally. Numerical investigation was held firstly to determine the effect of diffuser angle, mixing chamber length, pump area ratio and driving nozzle position on the jet pump efficiency. Commercial computational fluid dynamics (CFD) solver ANSYS R 15.0-FLUENT using SST-turbulence model was used. The numerical results showed that jet pump efficiency increases with decreasing both of diffuser angle and mixing chamber length up to a certain value and then pump efficiency decreases. Also, jet pump efficiency increases with increasing pump area ratio up to a certain value and then pump efficiency decreases. It was found that maximum computed efficiency is 37.82 % at the pump area ratio of 0.271 and a pressure ratio of 0.317. In addition, the numerical results showed that the optimum relative length of mixing chamber is 5.48 and the optimum value for diffuser angle at which the efficiency is a maximum value is 5º. Experimental tests were conducted to study the effects of various geometrical and operational parameters on the performance of the jet pumps. A test rig was constructed using the optimum design from the numerical results. The physics of flow within axial-water jet pumps can be analyzed and optimized easily by using the CFD, 2D technique with a satisfactory accuracy in order to save computational time and cost. The CFD’s results were found to agree well with actual values obtained from the experimental results.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401MODELING AND ANALYSIS OF A THREE STAGE MULTIPERIOD SUPPLY CHAIN1191346634110.21608/erjm.2017.66341ENM. S.AbassFaculty of Engineering, Modern University, Egypt.A.M.GaaferMechanical Department , Faculty of Engineering, Benha University, Egypt.A. R.SaadMechanical Department , Faculty of Engineering, Benha University, Egypt.Journal Article20191225In today’s highly competitive environment, an effective supplier selection process is very important to the success of any manufacturing organization. In this context, supplier selection represents one of the most important functions to be performed by the purchasing department. This paper presents a supplier selection problem along with an integrated multi objective, multiproduct, multi period model under hybrid Make-To-Stock (MTS)/Make-To-Order (MTO) production strategy. The model consists of manufacturer, multi-product, multi distributer, and multi-supplier. The objective of the model is to minimize the total cost, minimize the total delivery time, and maximize the facility utilization involved in running supply chain via Fuzzy Goal Programming (FGP) approach. The model is tested with a set of realistic data and the optimal results show that most of strategic and tactical decisions are obtained. So the model is validated and provided useful tool to select the optimal supplier.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401CHARACTERIZATION OF CNTs /CARBON NANOFIBRIL COMPOSITES VIA POSITRON ANNIHILATION1351436634210.21608/erjm.2017.66342ENM. A. H.EL-MeniawiMaterials Engineering Department, Faculty of Engineering, Zagazig University, EgyptAnd A. A.AliMechanical Design and Production Engineering Department, Faculty of Engineering, Zagazig UniversityJournal Article20191225Three groups of Carbon Nano Tubes (CNTs) of three different diameters, and each with five different weight concentrations were dispersed in a polyacrylonitrile (PAN)/ dimethylformamide (DMF) polymer solution. Electrospinning technique has been utilized to produce nanofibril composite fabrics from PAN/DMF with CNTs dispersions . Then, the collected fabrics were thermally stabilized and carbonized under static pressure to activate the high surface energy aiming to build firm and strong fabrics. The resultant carbonized sixteen fabrics showed reddish color with strong (as maximum as 60MPa strength) and flexible (as maximum as 5% strain) behaviors. Morphological characterization by using SEM showed minimum average fibril diameter of 130±20 nm for the smallest CNTs diameter. The effect of CNTs size on the electrospun fiber diameter has been investigated. Also, evaluation of the presence of CNTs inside the carbon nano fiber has been investigated by using HRTEM. Mechanical properties (strength and modulus of elasticity) of the fabrics have been investigated. AFM has been used to measure the modulus of single nano fibril composite. Thermal conductivity has been measured precisely to study the effect of CNTs on thermal properties. Positron annihilation lifetime spectroscopy (PALS) was employed to measure the free volume properties of the fabrics and correlated it to fabric's morphological, mechanical and thermal properties. It has been noticed that in general the presence of CNTs decreased the free volume values resulted in dense structure and improved its thermal conductivity. Also, as CNTs diameter decreases the free volume decreases resulted in improvement in fabric's strength and thermal conductivity.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401ESTIMATION OF ORTHOMETRIC HEIGHTS USING MODERN GPS SATELLITE-BASED POSITIONING DIFFERENT TECHNIQUES AND APPLICATIONS1451536634310.21608/erjm.2017.66343ENA. FEl ShonuyKing AbdulAziz University, Faculty of environment Design, Jeddah , Saudi Arabia,
Assistant Professor, Survey Research Institute, National Water Research Center, Egypt,Journal Article20191225One of the most interesting and challenging tasks in several fields and applications of geodetic surveying is obtaining orthometric or geoid heights. Determination of orthometric heights using traditional methods such as levelling works with different orders and standards is difficult and hard due to its long time, high cost, and big efforts but it is considered as the most accurate technique in determining orthometric heights. With the wide spread development of Global Positioning System and its different techniques and applications in the last periods, It was important to study the ability of using some of its applications instead of levelling works, and to investigate the accuracy obtained from each one of these techniques. So the objective of this research is to study the use of several modern GPS satellite techniques and applications , such as local and global geoid models and precise point positioning, for determining orthometric heights, and also to evaluate the effect of using these techniques by comparing their results with that obtained from surveying levelling. The study area is located in Egypt and divided into two separated zones along the Mediterranean and Red Sea coastal lines. These areas are particularly important in order to assess the impacts of climate change and global warming using different suitable defense strategies. It has been found that local geoid model technique gives the best results comparing with the other techniques. It is recommended that a precise local geoid for all Egypt zone area should be created by co-operation of all interested organizations in this field.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401تأثيز العمارة الذکية على العمارة المصزية المعاصزة1551646634410.21608/erjm.2017.66344ENإيمان عيدعطيةکلية الهندسة-جامعة المنوفيةحسام الدينمصطفيکلية الهندسة-جامعة المنوفيةمي أميرابو الخيرJournal Article20191225تعد المبانى مف أعمى المجاالت استيالکاً لمطاقة، فيى تستيمؾ مايقرب مف 40 %مف استيالؾ الطاقة العالمى، ومسئو لة عف نفس النسبة تقريباً مف انبعاثات الغا ازت المسببة لالحتباس الح اررى، وتشکؿ أيضاً نحو00 %مف استيالؾ الکيرباء. نتيجة لذلؾ زاد اإلىتماـ بمحاولة إيجاد اعترفت صناعة التشييد والبناء بمساىمة المبانى حموؿ متطورة ومبتکرة، فظيرت المبانى الذکية وأصبحت نمط ىاـ فى أسموب الحياة الحالية، و يواجييا العالـ مستقبمياً فى توفير الذکية فى عالج مشاکؿ الطاقة العالمية، ولکنيا غير مستغمة بالشکؿ الکافى. وبزيادة وعى الدوؿ لممشاکؿ التى کمية الطاقة المطموبة لتمبية اإلحتياجات السکانية قامت عدة مبادرات لتطوير تمؾ النظـ التى تدير المبانى الذکية بإعتبارىا مبانى موفرة لمطاقة. تتناوؿ الورقة البحثية مجموعة مف الحموؿ و األفکار المعمارية لحؿ مشاکؿ الطاقة واإلستفادة مف منظمومة العمارة الذکية ويتـ ذلؾ عف طريؽ إستعراض أنظمة العمارة الذکية، ثـ عرض بعض النماذج العالمية لموقوؼ عمى أىـ تطبيقات وعناصر األنظمة الذکية لتقميؿ استيالؾ الطاقة بالمبانى، ومف ثـ عمؿ مقارنة بيف تمؾ العناصر لموقوؼ عمى مدى إمکانية تنفيذ ىذه األفکار ووضع معايير واضحة لموصوؿ إلى النتائج المرجوه. يتکوف ىذا البحث مف أربعة أجزاء وىى: 1 -الدراسة النظرية ألنظمة العمارة الذکية. 2 -عرض بعض األمثمو العالمية و العربية والمحمية لمعمارة الذکية وما ينتج عنيا مف توفير فى الطاقة. 3 -المقارنة بينيا لتوضيح مدى تأثير العمارة الذکية. 4 -النتائج والتوصيات.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118040220170401الخصائص المعمارٌة لمنشآت الاوقاف فًى النصف الاول فًي القرن العشرٌين1651746634510.21608/erjm.2017.66345ENإيمن محمد عيدعطيةکلية الهندسة - جامعة المنوفيةمحمد عادلشبلکلية الهندسة - جامعة المنوفيةإسلام أحمدعبد القدوسJournal Article20191225نشؤت األوقاف کنظام أهلى لتقدٌم خدمات إجتماعٌة وروحٌة للمجتمع کؤهم القربات هلل تعالى، وهً فً معناها الفقهً حبس کل ما ٌمکن االنتفاع به وتسبٌل عوائده على أغراض البر المختلفة، وقد إرتبطت إرتباطا مباشرا بالعمران، وٌمثل الطابع المعماري للمنشئات الوقفٌة قاعدة اساسٌة من قواعد العمارة اإلسالمٌة بما ٌمتلکه من تراث عمرانً کبٌر ش َکل الکثٌر من المدن والحواضر عبر التارٌخ االسالمً. وٌسعى البحث بإستخدام إستراتٌجٌة بحث کٌفٌة ونموذج قٌاس تحلٌلً ٌعتمد على نظرٌة فٌتروفٌوس وٌعمل على قٌاس عالقة المنشئات بقٌم الوقف والنظرٌة المعمارٌة لتحدٌد خصائص وسمات النموذج المعماري الوقفً للمبانً المساندة اإلقتصادٌة، والتً ٌتؤثر تصمٌمها مباشرة بفعل اإلسلوب اإلداري للوقف والتً ٌعتمد علٌها فً توفر مصروفات تشغٌل وانشاء وترمٌم المنشآت الموقوفة الرئٌسٌة، وذلک من خالل دراسة تؤثٌر القرارات اإلدارٌة الحکومٌة علً تصمٌمها المعماري فً فترة اإلستقالل النسبً لألوقاف من منتصف القرن التاسع عشر وحتى منتصف القرن العشرٌن فً مدٌنة اإلسکندرٌة.