Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101An Experimental Investigation of a Darrieus Straight-Bladed Wind Turbine197209810.21608/erjm.2020.72098ENK. A.IbrahimProf., Faculty of Engineering, Menoufia University, Egypt.W. A.El-AskaryProf., Alexandria Higher Institute of Engineering and Technology (AIET), Egypt.Tarek A.GhonimLecturer, Faculty of Engineering, Menoufia University, Egypt.Ahmed M.NebiewaDemonstrator, Faculty of Engineering, Menoufia University, Egypt.Journal Article20200219Wind energy is the fastest growing energy in the world today. Vertical axis wind turbine (VAWT) is <br />an effective way to benefit from this energy. So that, the present work aims to improve the <br />performance of Darrieus straight bladed rotor. For improving the performance Darrieus straight <br />bladed rotor, six aspect ratios and four chord lengths of Darrieus rotor are experimentally selected in <br />an attempt to improve the performance of Darrieus wind turbine. The experimental results in the <br />present work are obtained using three blades of a new airfoil shape design which is designated as<br />EN0005 at different wind speeds. The comparison between six aspect ratios at the same wind speed <br />and chord length showed that, the rotor with aspect ratio 0.833 and chord length 18 cm produces the <br />maximum power coefficient.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101MELTING CHARACTERISTICS OF CAPSULATED PHASE CHANGE MATERIALS11227210810.21608/erjm.2020.72108ENAhmad A.SultanMansoura University, Faculty of Engineering, Mechanical Power Department, EgyptEmadAl-NegiryMansoura University, Faculty of Engineering, Mechanical Power Department, EgyptAliRadwanMansoura University, Faculty of Engineering, Mechanical Power Department, EgyptMohammadAlawadyAl-Diwaniyah Governorate, Al- Diwaniyah Water Directorate, IraqJournal Article20200219An experimental and computational investigation studied phase change material melting in a cylindrical capsule with <br />PCM. The capsule is placed horizontally in a rectangular test section, where it is insulated from all sides’ wall except <br />the front one. The PCM capsule is heated by passing hot water from downward to upward with different inlet mean <br />water temperatures (327.9, 333.7, 338 and 343) K, different velocities, varied thermal conductivities of capsule <br />material wall (copper, iron, pyrex-glass, and polyethylene), and PCM. Experiment during melting inside a pyrex-glass <br />capsule was performed and compared with prediction analysis by using CFD ANSYS 2019 R2. Image processing of <br />melting photographs along with melted time were used in comparison. The comparison between the liquid fraction <br />and energy stored with time for lauric acid and paraffin wax was analyzed. PCM liquid fraction, temperature and <br />energy stored measurements for lauric acid were assessed numerically. The results reveal for lauric acid that the total <br />melting time was enhanced 43% for 4.6% increase in water mean inlet temperature, 18% for 500% increase in inlet <br />water mean velocity, and 7% when used copper capsule wall. The results proved that the lauric acid charged with <br />energy stored were 47% more than paraffin wax during the total melting time of it, and the effect of different water <br />mean inlet temperatures was the main factor for the charging process to improve the PCM melting time.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101EVALUATION OF OPTIMUM CONFIGURATIONS FOR COMPOSITE OILFIELD THREE-PHASE SEPARATOR PRESSURE VESSEL23397211110.21608/erjm.2020.72111ENA. A.HassanPiping stress analysis engineer, Engineering for the Petroleum &
Process Industries Company - ENPPI, Cairo, Egypt (correspondingM.Abo-ElkhierProfessor, Menoufia University, Faculty of Engineering, Production
Engineering & Mechanical Design Department, Egypt,B.Abd El-baryAssistant Professor, Menoufia University, Faculty of Engineering,
Production Engineering & Mechanical Design Department, Egypt,Journal Article20200219Gravity three-phase separators consist of pressure vessel with multiple internals that utilize <br />gravity settlement to separate gas/water/oil free from each other. The pressure vessel represents the <br />substantial element of such separators. Limited work has been reported on investigating fluid <br />contained multilayered filament-wound composite pressure vessels. However, destructive testing <br />with full scale or subscale is the best method to determine the structural characteristics of filamentwound pressure vessels as it requires an excessive cost. In this study, three parametric numerical <br />models have been undertaken to represent three load cases namely; pure pressure, operating, and <br />hydro-test load cases in order to predict optimum lay-up for filament-wound pressure vessels of sglass/epoxy, carbon/epoxy composite laminates and hybrid of both for certain configurations. <br />ANSYS (ACP) 17.0 commercial software was used for simulation and analysis. ANSYS <br />Workbench design point parameters were used to construct parametric models. A developed <br />mathematical solution used from cited work was employed for results verification using Tsai-Wu <br />failure criterion for the safe design assessment in terms of safety factor. The findings indicate that <br />for operating load case, optimum lay-up should be selected according to foreseen loading ratio <br />acting upon pressure vessel during its lifetime, and hydro-test load case is safe for all studied layups also.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101Failure Analysis of an Exploded Large-Capacity Liquid Storage Tank Using Finite Element Analysis41507211310.21608/erjm.2020.72113ENKamelMuhammadDepartment of Production Engineering and Mechanical Design, Menoufia
University, Shebien El-Koum, EgyptMahmoudAbo-ElkhierDepartment of Production Engineering and Mechanical Design, Menoufia
University, Shebien El-Koum, EgyptJournal Article20200219In case of liquid storage tank has been designed regardless of international standards and there is <br />little interest with its operating conditions, it may lead to fully or partially failure. This paper has <br />studied a failure of Toluene storage tanks with different capacities. Toluene is a liquid aromatic <br />hydrocarbon C7H8 which is toxic, flammable and may cause boiled liquid expanded vapor <br />explosions (BLEVE). Failure analysis was performed to determine the root causes of toluene <br />storage tank failure as well as corrosion influence. Axisymmetric finite Element analysis <br />(FEA) was performed for fillet welding of tank roof and top shell zone to develop a relation <br />between weld electrode size and tank diameter at each type of weld electrode to determine the <br />main framework of roof to top shell welding process. Also, to develop a relation between tank <br />diameter and maximum stresses that resulted at every amount of vapor pressure according to <br />maximum von-Mises stress theory. The optimum roof to top shell welding size is obtained through <br />the circumference welding path. The results of analysis allowed us to redesign the tank according <br />to API 650 and to express the recommendations for toluene storage tanks operation.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101Experimental and Theoretical Study of the Performance of Solar Water Heaters with Gravity-Assisted Heat Pipes51617211610.21608/erjm.2020.72116ENMousa M.MohamedStaff members, Faculty of Eng., Menoufia University, EgyptMostafa A.Abdel-BakyStaff members, Faculty of Eng., Menoufia University, EgyptTarek A.GhonimStaff members, Faculty of Eng., Menoufia University, EgyptKarima A.SolimanFaculty of Eng., Omar Al-Mukhtar University, LibyaJournal Article20200219The objective of this work is to study the performance of solar water heaters using heat pipes <br />for heat transfer, from absorber plate to water tank, with two different types of working fluids <br />(Ethanol and Acetone) and different numbers of heat pipes. Additionally, a theoretical investigation <br />is conducted to predict the performance of the solar water heaters. These systems have been <br />designed and fabricated with the same dimensions and materials. The hourly variation of the <br />absorber plate temperature, the water storage tank temperature and solar radiation intensity are <br />measured. Accordingly, the stored energy and the efficiency has been calculated. The results showed <br />that, a good agreement has been achieved between the experimental and theoretical results. The <br />operation point of the conventional system begins at the operating start while the operation point of <br />the thermosyphon systems starts when the absorber plates temperatures reaches the boiling point of <br />the working fluid. The maximum water temperatures gained of the forced convection system and <br />thermosyphon system charged with ethanol and acetone were 66 C, 67.8 C, and 64.6 C, <br />respectively while those of theoretical calculations were around 69.2 C, 69 C and 69.3 C, <br />respectively. In addition, the maximum value of the actual efficiency of conventional system was <br />ranged between 47~53% while that of theoretical calculation was between 50~53%. The <br />experimental maximum efficiency of thermosyphon systems was around 55% at the case of <br />installing 14 heat pipes charged with acetone and theoretical efficiency was 55% for same the case. <br />The thermosyphon system gives better performance than forced convection system, because <br />thermosyphon system does not consume electricity. Performance of the thermosyphon system using <br />acetone as working fluid was better than the performance of the thermosyphon system using ethanol <br />and the increase of the heat pipes number improves performance.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101Performance of hybrid bars in corrosion and flexure in concrete beams63707212310.21608/erjm.2020.72123ENR. R.KamarResearcher, Civil Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt.A. S.DebaikyAssociate Prof, Civil Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt.M. H.MansourAssistant Prof, Civil Engineering Department, Faculty of Engineering, Benha University, Cairo, Egypt.Journal Article20200219Corrosion of reinforcing steel is a serious problem worldwide; the problem of steel rebar corrosion leads to a <br />reduction in the lifespan of the structure and adds to the maintenance costs. Many techniques have been developed in <br />recent past to reduce corrosion but none of these solutions seem to be applicable as an adequate solution to the <br />corrosion problem. Besides the use of Fiber Reinforced Polymer (FRP) rebar, hybrid rebar consisting of both FRP <br />and steel are also being tried to control the problem of steel corrosion. This research evaluates the performance of <br />hybrid rebar in corrosion resistance by inducing natural corrosion in a number of concrete cylinders with a hybrid <br />rebar embedded symmetrically. The research also studies the performance of hybrid rebar as a tension reinforcement <br />in concrete beams.Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101تطبيق إستخدام الطاقة المتجددة بالمباني الإدارية القائمة کأحد جوانب توفير الطاقة71837213110.21608/erjm.2020.72131ENإيمان محمد عيدعطيةأستاذ العمارة وتاريخ ونظريات العمارة - قسم الهندسة المعمارية - کلية الهندسة - جامعة المنوفيةأسماء مصطفيالشاميمدرس بقسم الهندسة المعمارية - کلية الهندسة - جامعة المنوفيةبسنت محمد عبد القادرالجيلانيباحثة ماجستير - کلية الهندسة - جامعة المنوفيةJournal Article20200219Egypt's consumption of non-renewable energy sources led to a shortage of its natural reserves of oil, natural gas and <br />coal, and the depletion of available resources without taking into account the right of future generations. Also, energy <br />production from these sources causes environmental pollution and as a result, the World Health Organization has <br />determined that the proportion of pollution in Egypt exceeds Three times the global rates of environmental pollution, <br />and therefore we should go to the use of renewable energy sources. The old existing office buildings were chosen <br />because they represent a large percentage compared to new construction, and suffer from energy consumption during <br />work days ,so this research paper aims to identify weakness points in the development of old office buildings in <br />Egypt, it's important to develop the old buildings because of their economic and environmental benefits, they are less <br />expensive than new buildings in terms of economic cost and energy consumption and on the other hand it helps to <br />extend the building life. This study follows the inductive methodology by studying the strategies of some countries <br />to improve and develop energy efficiency in the old office buildings through the renewable energy's application, And<br />follow the analytical methodology by analysing global and local office buildings that have been developed and<br />improve its energy efficiency.<br /><br />Menoufia University, Faculty of EngineeringERJ. Engineering Research Journal1110-118043120200101مواجهة تحديات التغريب من خلال أعمال المعماريين الأجانب في مصر85927213410.21608/erjm.2020.72134ENإيمان محمد عيدعطيةأستاذ العمارة وتاريخ ونظريات العمارة - قسم الهندسة المعمارية - کلية الهندسة - جامعة المنوفيةشيماء مصطفيحامدکلية الهندسة - جامعة المنوفيةJournal Article20200219Architecture is the true image and true expression of human civilization, it is the life that lives in the past, and <br />lives in the present and will remain in the future. The research problem is the urban and architectural <br />deterioration and the absence of Egyptian identity resulting from the Egyptian architects tradition of Western <br />architecture without adapting it according to the eastern Egyptian standards.Monitoring the most important <br />architectural standards and foundations derived from the works of foreign architects in Egypt and trying to apply <br />them in the light of contemporary conditions for the advancement of architecture and urbanism.<br />In order to reach the previous goal, the research deals with the study of the mid-nineteenth century to the present, <br />which was divided into two phases, the first stage in which foreign work flourished heavily in Egypt, the stage of <br />foreign architects 1598-1288, which saw the full projects characterized by frankness and clarity and expression <br />The character derived from the conservative Western of Egyptian identity and outlook.<br />The second phase was the stage of retreat and decline of foreign work 1952-2019, starting with the socialist <br />period and then through the opening up to the present time, and this period has witnessed devastating <br />architectural chaos, and Cairo is suffering from a series of problems related to the randomness of growth and the <br />inability to control it.<br />The research applied the impact of various factors on architecture and urbanism during the previous stages on the <br />suburb of Heliopolis, analyzing the change in the urban and architectural character in the suburb in order to reach <br />the criteria that can be applied at the present time to promote architecture and urbanism.