Comparative Study Methods of Trajectory Tracking Control for Robot Manipulator.
R.
Hassan
Assistant lecturer, Electrical Engineering Department, Faculty of Engineering, Suez Canal University, Ismailia, Egypt
author
F.
Bendary
Professor, Electrical Engineering Department, Faculty of Engineering, Benha University, Shobra , Egypt
author
K.
Elserafi
Associate Professor, Electrical Engineering Department, Faculty of Engineering, Port Said University, Port Said, Egypt
author
A.
Ghanem
Doctorate Engineer, Electrical Engineering Department, Faculty of Engineering, Suez Canal University, Shobra, Ismailia, Egypt
author
M.
Soliman
Doctorate Engineer, Electrical Engineering Department, Faculty of Engineering, Benha University, Shobra, Egypt
author
text
article
2020
eng
In this article a three non-model based trajectory tracking controllers for rigid simple open chain robot manipulator are investigated. The first is a Fuzzy-PID controller, it is considered as a reference benchmark to compare its results with the others which are a proportional Derivative (PD) tuned using genetic algorithm (GA) and an Adaptive Neuro Fuzzy Inference System (ANFIS). The simulation is carried out for the first three joints of robot arm (PUMA560) aiming to track aquintic polynomial trajectory with minimum errors, and good disturbance rejection. Simulation results, shows that using Fuzzy-PID has better steady state error and RMS error than the ANFIS and PD tuned using GA. The three controllers are tested by simulated under the same conditions using SIMULINK under MATLAB2013a.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
1
12
https://bfemu.journals.ekb.eg/article_101868_4d69056b6f950de8a9df1d73ec293fc6.pdf
dx.doi.org/10.21608/bfemu.2020.101868
Online Stability Analysis during Power System Restoration Based on Phasor Measurement Units.
M.
Kotb
Electrical Engineering Department, Mansoura University, Mansoura 35516, Egypt
author
S.
Kaddah
Prof, Electrical Engineering Department, Faculty of Engineering Mansoura University, Egypt, She is the head of Electrical Engineering Department
author
K.
Shebl
Electrical Engineering Department, Mansoura University, Mansoura 35516, Egypt
author
M.
Elsedeek
Electrical Engineering Department, Mansoura University, Mansoura 35516, Egypt
author
text
article
2020
eng
This paper presents a study for electrical power system stability during restoration operation utilizing Wide Area Measurement System (WAMS) by using Phasor Measurement Units (PMUs) to guarantee smooth power system operation. One of the major benefits of this research is to provide the operator with the critical decisions about generators loading steps at the restoration process ensuring power system stability. Generators and Loads models parameters are accurately estimated using WAMS data. Another important benefit is suggesting priority list of the most feasible tie lines that can be closed between different islands needed to be integrated during restoration depending on the unification of islands phase angle references using WAMS. The buildup restoration strategy is used to restore the Bulk Power System (BPS). Nowadays, the introduction of WAMS using PMUs facilitates the restoration process by allowing the operators to access the phase angle of all power system quantities synchronously. Dig SILENT software is used to study the stability during the early restoration stages. The New England 39-bus power system is used as a large-scale power system to demonstrate the proposed algorithm, verify the results and prove its capability in practical systems.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
13
28
https://bfemu.journals.ekb.eg/article_101870_1b7d85345e874bd7461dad9d0ae5d466.pdf
dx.doi.org/10.21608/bfemu.2020.101870
Experimental Investigation of Switched Reluctance Motor Detailed Performance under Balanced and Unbalanced Operation.
M.
Hamouda
Electrical Engineering Department, Mansoura University, Mansoura 35516, Egypt.
author
A.
Amin
Electrical Engineering Department, Mansoura University, Mansoura 35516, Egypt.
author
Eid
Gouda
Electrical Engineering Department, Mansoura University, Faculty of Engineering, Mansoura, P.O. Box 35516, Egypt
author
text
article
2020
eng
The simple construction, robust design, and low cost of the Switched Reluctance Motor (SRM) made it an attractive candidate for many applications. This paper presents the detailed performance of 6/4 SRM. This motor has been considered in order to explain the effect of balanced and unbalanced operation. For this respect, extensive experimental tests and results have been obtained. The carried tests have been classified into Measuring the self-inductance using DC source at several rotor positions, Measuring the steady state balanced and unbalanced torque-speed characteristics, Static loading (R, RL Loads), and recoding the detailed SRM dynamic performance in terms of terminal quantities (current, voltage and flux linkage) at low speeds and high speeds. Moreover, this paper presents the operation of the driving circuit with one switch for each phase which is known as soft chopping operation. This case study is included to declare the SRM performance during this mode of operation.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
29
40
https://bfemu.journals.ekb.eg/article_101876_dc79121db54bfb4d682823f0afec4c40.pdf
dx.doi.org/10.21608/bfemu.2020.101876
The Continued Development of Architects’ Professional Skills in Egypt.
Amr
Mamdouh
Department of Architectural Engineering, Future University in Egypt (FUE).
author
Sherief
Sheta
Architecture Department, Faculty of Engineering, Mansoura University, Egypt
author
Saad
Makram
Department of Architectural Engineering, Mansoura University
author
text
article
2020
eng
The Architecture career is very important, not only for being the producer of the architectural environment we live in, but also for being the creator of the architects mind and character, and it effects on their behavior with others. And if you are following the architecture career in Egypt, you’ll notice that the quality of architects’ professional skills is decreasing by time, and that the concept of continued education and development is decreasing too. That’s why this study is assuming that: The concept of continued education is absent from the architects’ in Egypt. The architectural professional organizations in Egypt are not taking the lead to support the architects in Egypt, and to insure their continued education and the development of their professional skills. Although there are about thirty department of architecture in the Egyptian public universities, and forty four department of architecture in the Egyptian private exist now in Egypt to prepare the architect with the fundamental education, completing this preparing happens during his actual experience years as a professional architect. The research aims at: Trying to form methods that grantee the effective developing for the architect, which make him/her able to challenge the updated developments that happen in the architecture field in Egypt. And the limits of this study are all of the architecture graduates in Egypt from public and private universities with their different age segments.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
1
21
https://bfemu.journals.ekb.eg/article_101880_e7d94cc1f8faf99fb14e459235ef2cdb.pdf
dx.doi.org/10.21608/bfemu.2020.101880
The Concentration of Functioning of Nature's Workshops within Residential Zones and its Impact on Sustainable Development in Cities.
Asaad
Aboughazala
Department of Architecture., Faculty of Engineering Al-Azhar University- Cairo.
author
text
article
2020
eng
Urban growth in the majority of Arabian cities during the second half of the 20th century & early 21st century had led the growth of all sectors of the city including the availability and the growth plans, and did not update and review these charts, resulting in physical problems resulting in many economic and social problems and security and others, most notably the accelerating urban growth secretions is the concentration of many professional activities and workshops in residential area, this concentration has many requirements That did not materialize but lack the necessary studies or as a result of its composition via a specific time era is characterized by the absence of control and deficiencies in the preparation of plans and programs for development of these cities. The research aims at studying the concentration of activities and professional workshops, and their pressure effects are calculated on all the sectors of construction, utilities and movement paths on the perimeter and its district, and study their pictures automatically to the slums area, where the slums as the organism grows and grows over time a detachment of many environmental problems and physical and social security beyond the rates and standards planning which affects the functionality of all the city's activities (commercial, administrative & educational. ...) & then in the process of urban development Overall, as is the case with many cities, leading to the formulation of a set of multi-level actions can organize city growth and thus reduce the appearance and growth of slum area to reduce their impact to ensure the comprehensive development process of the city Supported for this theoretical analytical approach to explain and analyze terminology function and method analytical monitoring for monitoring and analysis of the current status of some of these activities centering images and professional workshops for some cities and their implications.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
22
43
https://bfemu.journals.ekb.eg/article_101884_6c593da4a3e1d7f817ef73d9f91e2cf4.pdf
dx.doi.org/10.21608/bfemu.2020.101884
Sustainability of Contemporary Rural House between the Perceptual Experiences of Hassan Fathy and Ramses Wissa Wassef.
Aya
Elkamhawy
Architectural Department, Faculty of engineering, kafrelsheikh University
author
Mona
Elwazir
Architectural Department , Faculty of Engineering, Mansoura University
author
Sherif
Sheta
Architectural Engineering Department., Faculty of Engineering., El-Mansoura University., Egypt.
author
text
article
2020
eng
The changes that happened to the Egyptian Village are more like a dissociation of the old traditional Egyptian Village with its all social, cultural, economic, political and technological aspects. This dissociation is a result of the struggle between the reality of the village and what the future demands. These changes made the Egyptian Village in the 21st century totally different than before in its all urban, population, cultural and production features. Moreover, having those changes happening fast, there was not enough time for the village to evolve with this change. Consequently, a rural architecture has been resulted with way more disadvantages than advantages; the architectural village did not have any relation to the different environmental aspects. Accordingly, there was no harmony with the climatic factors, neither with the customs and traditions. Houses began to be open and the courtyards areas were declined or even disappeared in many rural houses. Furthermore, the rural house lost its production area which was considered one of the most special characteristics. Also, possessing the new culture with its concrete houses, iron gates, and open terraces made the objective of this research is to reach recommendations help determine the basics which should be considered in the modern Egyptian architectural village. These principles should accomplish the continuity of the healthy, power saving, environment friendly, in harmony with the customs and traditions style. As a result, herein, this research studied and analyzed the rural houses of the architects Hassan Fathy and Ramses Wissa Wassef. Those examples could be considered as applications of the sustainability standards that achieved great results in its environmental performance. This study also aims at reaching the most important sustainability standards which have been applied in these buildings in order to find a strategy attains contemporary rural houses with a special environmental performance.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
44
56
https://bfemu.journals.ekb.eg/article_101897_7940a9561cbd72f70084f266e173d28e.pdf
dx.doi.org/10.21608/bfemu.2020.101897
An Islamic Vision of the Architectural Education Curriculum.
Shukri
El Bellahy
Department of Architecture - Faculty of engineering sciences
Sinai University
author
text
article
2020
eng
The Continuous development in the architectural education system is inevitable, both in terms of the message and objectives, and in terms of the methodology, which is the access to achieve these objectives. The ethical aspect is an essential element in the university education system has been neglected and ignored, especially in the architectural education curriculum. Which has impacted negatively on the ability of the current study plans and curriculum of the architecture departments in the Egyptian universities and institutes to achieve their objectives, as a result of negligence choose the most appropriate method to achieve these objectives. In the past decades many studies revealed that the problems of the architectural education in Egypt are a reflection to the society problems of the collapse of the moral values, as a result of cons in the structure and content of the architectural education curriculum. this research aims to verify that the ethics - in general - and especially the professional ethics, have a role in exacerbating the problems of the architectural education product on one hand and the architectural and urban product on the other hand. This Research focuses on analyzing the study plans for a number of architecture departments at Egyptian universities, and compare it with the study plans of the architecture department at the University of Al-Azhar, and the Islamic architecture department at the University of Umm Al- Qura in Makkah. To highlight the role that can be done by the modifications in these study plans to solve those problems from an Islamic perspective. This study has concluded to emphasize importance of the legalization and standardization of the hour's number per course at all architectural engineering departments, especially when the scientific contents of the curriculum are similar. This study also recommended that adding the courses of the islamic ethics and its sources to the study plans of the architecture departments as a part of the basic courses, and also as elective courses are important, to give the students the ethics of science, beside acquiring the tools of science from the technical and professional curricula, also supplying the students with the ability to produce and develop an architecture which defend and express the arabic and islamic identity of Egypt.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
57
76
https://bfemu.journals.ekb.eg/article_101899_4fc30588a301f9ebe33a3a172354f012.pdf
dx.doi.org/10.21608/bfemu.2020.101899
Towards a Sustainable Development of Al-Quseir: as a Coastal Intermediate City in Egypt.
Ahmed
Rashid
Department of Architecture, British University
author
Mona
Elwazir
Architectural Department, Faculty of Engineering, Mansoura University
author
Walaa
Abd Al-Razik
Architect, Department of Architecture, Mansoura University
author
text
article
2020
eng
Al-Quseir is considered to be a small intermediate City situated on the western Red Sea Coast (latitude 34 015” N, Longitude 260 04’E).It was one of the first places in the Red See basin to be settled. Al-Quseir Strategic geographical position and local environment have played an important role both in the city’s formulation and development. The intermediate cities are considered to be one of the cities that had a vital and powerful foundation in establishing a significant economic and social interaction. Al-Quseir is classified as an intermediate city (according to UIA-CIMES program) that has costal environments with great economic value. This Paper aims to highlight the features of sustainable development to prospers coastal intermediate cities and provide plans and new approaches to be applied to its counterpart, then to control and predict the rates of urban development in order to control the direction of sustainable urbanization in intermediate cities. All of these issues were studied previously from the theoretical point of view that deals with the concepts related to the research problematic, reviewed it through an analytical study of the city represented in Al-Quseir city as a coastal intermediate city on the coast of the Red Sea, to come with an analytical research ended with results & recommendations.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
77
91
https://bfemu.journals.ekb.eg/article_101902_d3503c62c5f26721d92db9428ac895d2.pdf
dx.doi.org/10.21608/bfemu.2020.101902
The Role of Public Participation in the Upgrading of Heritage Environment.
Sameh
Kadry
Architectural Engineering
author
Asmaa
El-Badrawy
Department of Architecture – faculty of Engineering – Mansoura University
author
Mohamed
Alazab
Professor, Architectural Engineering Department, Faculty of Engineering, Mansoura University
author
text
article
2020
eng
Heritage regions in Egypt are Considered one of the most important regions that reflect its history, it contains a set of buildings which telling the story of the historical periods that occurred in Egypt , these buildings have an architectural, historical and artistic value, that must be maintained, the surrounding environment of these buildings are considered an important and complementary elements, as it reflects the persons who are influenced and affected by it in a reciprocal relationship that can't be ignored, some projects have been made to maintain these heritage buildings without any concern to the surrounding environment .which causes a defect effects negatively on the maintain project. So an attention must be paid to the surrounding environment of the historic building, upgrading and developing it comprehensively ,this attention must cover all aspects of social, economic, physical and administrative aspects, within the framework of public participation in order to achieve sustainability of the project, and get benefits which reflects on the inhabitants of the place. So this research aims through this vision to study the historical environment and ways to upgrade and develop all its aspects, also ways of the public participation in the upgrading projects, through an analytical study to one of upgrading projects, and according there are going to be a set of recommendations to improve of dealing with upgrading projects.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
92
107
https://bfemu.journals.ekb.eg/article_101912_b42bc76236c06ff5e12c8313179111b1.pdf
dx.doi.org/10.21608/bfemu.2020.101912
Enhancing Oxidation Process in Chemical Looping Combustion Applying Jet Fountain Fluidized Bed.
A.
Jawdat
Mechanical Power Engineering Dept., Faculty of Engineering, Monsoura University, Monsoura, Egypt
author
A.
Hegazi
Mechanical Power Engineering Dept., Faculty of Engineering, Monsoura University, Monsoura, Egypt
author
F.
Okasha
Mechanical Power Engineering Dept., Faculty of Engineering, Monsoura University, Monsoura, Egypt
author
text
article
2020
eng
Chemical- Looping Combustion (CLC) has emerged as a very promising combustion technology for power plants and industrial applications with inherent CO2 capture. CLC avoids the energetic penalty present in other competing technologies. The technology basis is to transfer oxygen from air to the fuel by means of a solid oxygen-carrier avoiding direct contact between fuel and air. It consists of two successive reactions, oxidation and reduction, in two interconnected fluidized beds. The aim of the current work is to enhance the oxidation process by applying jetting fountain fluidized bed. A jetting fountain fluidized bed reactor has been designed, fabricated and installed to carry out the experimental work. It has 105 mm ID and 4000 mm height. Activated ilmenite has been used as oxygen carrier. During the tests atmospheric air is fed through an ilmenite bed that reacts with oxygen. The oxygen concentrations are measured after the bed to estimate the quantities of oxygen that combined with bed materials. The influences of operating conditions including bed temperature, fluidization velocity, jet air ratio and jet orifice height on the process effectiveness have been studied. The findings of the present work indicate that the jetting fountain fluidized bed is more effective in ilmenite oxidation where the oxidation conversion rate increases and the time required for full conversion reduces. Applying jetting fountain configuration enhances gas solids contact and improves the interphases mass exchange between bubbles and emulsion. The oxidation conversion rate was found to improve with bed temperature and fluidization velocity. On the other side, studying the influences of jet air ratio and jet orifice height demonstrate that there is an intermediate value at which the oxidation process records an optimal.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
1
13
https://bfemu.journals.ekb.eg/article_102389_68421ac8b28dd558524682e6e7362c7a.pdf
dx.doi.org/10.21608/bfemu.2020.102389
EMHD Mixed Convection Flow through Saturated Porous Rectangular Channel.
A.
Kabeel
Mechanical power engineering dept., Faculty of engineering, Tanta University, Egypt
author
M.
El-kady
Mechanical power engineering dept., Faculty of engineering, Mansoura University, Egypt
author
E.
El-Agouz
Mechanical power engineering dept., Faculty of engineering, Tanta University, Egypt
author
M.
Amro
author
S.
Dafea
Mechanical power engineering dept., Faculty of engineering, Tanta University, Egypt
author
text
article
2020
eng
This study aims to investigate the effects of electromagnetic fields on two-dimensional incompressible flow and heat transfer of an electrically conducting fluid flowing in a rectangular channel saturated with a porous medium. A numerical solution of the governing partial differential equations is obtained using finite volume method. The Vorticity stream function formulation is applied to eliminate pressure as a variable in the model equations. The algebraic equations are solved by using the Gauss-elimination method. The model equations are solved using a self-written FORTRAN CODE, which solve the nonlinear algebraic equations. The velocity and temperature contours were computed and illustrated. The graphs for Nusselt number are presented for different Hartmann numbers. The model is valid for a laminar flow (Re= 10 - 2000) with a wide range of the affected parameters Ha, Gr and Ef taking into account the effect of Joule and viscous dissipating energy. The calculations are valid for any values for Pr, Gr and Ec. To examine the validity of the proposed model, the obtained numerical results have been compared with available published experimental, analytical, and theoretical ones. The comparison shows good agreement between them.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
14
28
https://bfemu.journals.ekb.eg/article_102391_d4595ac1079f39ec1a84a8a8646e52bc.pdf
dx.doi.org/10.21608/bfemu.2020.102391
Numerical Simulation for Performance Study of Solar Chimney.
M.
Mousa
Professor and head Mechanical Power Engineering Dept., Faculty of Engi-neering, Monsoura University, Monsoura, Egypt
author
Ahmed
Hegazi
Lecturer, Mechanical Power Engineering Dept., Faculty of Engineering, Monsoura University, Monsoura, Egypt
author
M.
Abd Rabou
B.Sc Mechanical Power Engineering, Faculty of Engineering, Monsoura University, Monsoura, Egypt
author
text
article
2020
eng
In the present study, the problem of the two-dimensional steady free convection flow in solar chimney. The present model is utilized to obtain the results of the effect of parameters, which influence the performance of solar chimney. The problem investigates the streamline and isothermal inside the chimney for Rayleigh numbers ranging within (10³ ≤Ra≤10⁶), aspect ratio ranging within (0.25≤Y/X≤1) and inlet velocity (0≤Uin≤0. 5) for a fixed Prandtl number (Pr=0.7) and coefficient of arc (R=0.04). The governing equations are solved with finite-difference technique by central difference scheme. A computer program in (Matlab2012) was used to carry out the numerical solution. The results are presented in the form of streamline and isotherm plots. Also, the performance of solar chimney power plants at New Village city in Egypt is evaluated and an approximation of the quantity of the generated electrical energy is estimated.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
29
39
https://bfemu.journals.ekb.eg/article_102392_c8a4e9aa258dc2f44cba63c6aad40b35.pdf
dx.doi.org/10.21608/bfemu.2020.102392
The Effect of Changing the Shape of Tibial Component on the Performance of Total Knee Replacement.
B.
Eltlhawy
B.Sc. Prod. Eng., Mansoura University
author
N.
Fouda
Asst. Prof. of Prod. Eng., Faculty of Engineering, Mansoura University
author
T.
El-Midany
Prof. of Prod. Eng., Faculty of Engineering, Mansoura University
author
text
article
2020
eng
Stress shielding of the tibial component has remained one major cause of failure after total knee replacement surgery (TKR), which a relatively high stiffness of the prosthesis can cause most of the load to be transferred through the prosthesis rather than the bone. It leads to the resorption of the bone and a decrease in the bone strength and stiffness. The geometry of the tibial component has a strong effect on the bone compared to its material, so the present study investigates the optimum design of uncemented tibia tray to relieve the stress shielding by changing the dimensions of the metal tibial tray (shape optimization). The results of the optimization process for uncemented tibial component of TKR indicate a trend toward using a shorter cylindrical stem with a smaller diameter and longer metal tibial tray height to house the polymer insert compared with the initial design. This optimal shape model increases the maximum von-mises stress value five times the initial model on medial cancellous bone region. The maximum von-mises stress value of the optimal shape model is very close with that obtained using the natural bone with about 6.5% reduction in the maximum von-mises stress value on medial cancellous region. Also the maximum von-mises stress value of the optimal shape model is increased by 3% compared to the initial model on lateral cancellous bone region. Stress shielding is reduced related to increase stresses on medial and lateral regions. In addition, the maximum interface shear stress value on lateral region for the optimal shape model is decreased by 4% compared to the initial model. Aseptic loosening is decreased related to this reduction in shear stress on lateral side. This leads to reduce patient's pain and increases the implant life and stability.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
40
49
https://bfemu.journals.ekb.eg/article_102393_c8f836e9091987c612e3a0d76a0bdce8.pdf
dx.doi.org/10.21608/bfemu.2020.102393
Control Charts for Monitoring the Reliability of Multi-State Systems.
K.
Genada
Production and Mechanical Design Engineering Department, Faculty of Engineering, Mansoura University, Egypt
author
M.
Hussein
Production and Mechanical Design Engineering Department, Faculty of Engineering, Mansoura University, Egypt
author
A.
Abdel-Shafi
Production and Mechanical Design Engineering Department, Faculty of Engineering, Mansoura University, Egypt
author
text
article
2020
eng
Control charts are widely used tools for monitoring process behavior. However, for high-quality processes, using traditional Shewhart control charts is not appropriate. Thus, several types of control charts have been established for monitoring high-quality processes based on the Exponential and Weibull distributions. These charts were later adopted for reliability monitoring. So far, these charts have been dedicated for monitoring the reliability of binary-state systems, which have only two levels of performance—functioning or failed. On the other hand, multi-state systems exhibit different levels of performance. This paper introduces two new types of control charts for monitoring the reliability of multi-state systems. Both types monitor can monitor different state transitions with different rates using the same control limits. The first type is the Angular Limits Control (ALC) chart. The ALC chart depicts different system-state distinctively but with the same probability control limits. To achieve this, the chart uses probability control limits with different angles of inclination. The second type is the Transformed Exponential Control (TEC) chart. The TEC chart uses a transformed form of the Exponential distribution as a model for the time to fail.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
50
57
https://bfemu.journals.ekb.eg/article_102395_d4006d56cd43f6f060bb1468fb4456d4.pdf
dx.doi.org/10.21608/bfemu.2020.102395
Gas Turbines Waste Heat/Power Recovery in Tropical Climate Zones: Case Study.
A.
El-Ghonemy
Production Engineering and Mechanical Design Department
, High Institute of Engineering and Textile Technology, Egypt
author
text
article
2020
eng
The present study is applied on the gas turbines power plant that is currently under operation in northern kingdom of Saudi Arabia (KSA) since 1998. The plant consists of 7 gas turbine of 25MW each without inlet air cooling. More 2 gas turbine of 82MW each with inlet air cooling were added inDec 2007.In this area, during summer season, the ambient temperature may reach 50 °C, or higher in July and August. The objective is to present field results of this gas turbines power plant operation in order to measure and evaluate the performance. The results showed that, operating the plant at higher loads near to 100% is recommended for economic considerations, heat /power recovery by cooling the inlet air is advised, to overcome the problem of electricity black-out. Finally the results showed that disagreement between design and measured performance values is mainly due to higher ambient temperatures.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
58
71
https://bfemu.journals.ekb.eg/article_102396_cadfcd50d07ec1e5e0bb18ed55e25084.pdf
dx.doi.org/10.21608/bfemu.2020.102396
Modeling and Simulation of a Micro Pump and its Performance.
Mohamed
Ibrahim
Mechanical Power Engineering Department, Faculty of Engineering,
Mansoura University, El-Mansoura 35516, Egypt
author
Mohamed
Mansour
Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, El-Mansoura 35516, Egypt
author
Mohamed
Sabry
Mechanical Power Engineering Department, Faculty of Engineering,
Mansoura University, El-Mansoura 35516, Egypt
author
text
article
2020
eng
A transient 2D model of Valve-less micro-pump is constructed and used to study pump performance under different conditions through numerical simulation. Operating conditions, design parameters and fluid properties effect on the micro pump net flow rate have been investigated. The operating frequency was found to be a critical operating parameter. Therefore, the effect of other design and operating conditions on the resonance frequency (optimum operating frequency) has been studied. Also, general correlations for the micro pump dimensionless performance characteristics have been deduced with sufficient accuracy, within the studied range.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
72
85
https://bfemu.journals.ekb.eg/article_102397_3b5c7dfcc02af72a086ce319aca4944f.pdf
dx.doi.org/10.21608/bfemu.2020.102397
Effect of Microstructure and Hardness of Brass Alloys on the Wear Resistance of Impeller Pump.
Ahmed
EI-Bahloul
Production Engineering and mechanical Design Department
University of Mansoura, Egypt
author
M.
Samual
Production Engineering and mechanical Design Department
University of Mansoura, Egypt
author
K.
Mazin
Production Engineering and mechanical Design Department ,Ministry of Science and Technology, Iraq
author
text
article
2020
eng
Corrosion (Erosion) it is inserted as an engineering problem for Centrifugal slurry pumps it plays an important role in design and operation of slurry transportation systems. In most slurry pump applications the monetary loss due to pump failure consists of loss of production rather than the cost of the pump, since the process must be when the pump fails. If the erosion rate can be estimated, the pump impeller (manufactured from brass) can be changed out in time, during scheduled maintenance, the present work reports experimental investigations on dependence of erosion wear of brass alloy in sand - water slurry. Systematic study on the failing impeller of a slurry pump used in irrigation has been carried out by means of scanning electron microscopy in order to clarify the Corrosion mechanisms. The results show, the weight loss of the impeller result of the collision of particles of liquid or solid surface-and continuously, generated stresses by the particles probably caused configure mortise on the surface as aresult of erosion wear. In this investigation, experiments were carried out to evaluate the wear resistance using wear test rig designed and manufactured for this purpose. Three specimens of different brass alloys were used, namely (CuZn2Ge-CuZn4Ge-CuZn6Ge) Discs manufactured from. The accumulated loss of weight was measured and the wear rates were determined for each Case material at constant normal test load of 20kg. Number of revolutions of tests equals (1000- 1500-2000) rpm. were selected for the three test materials respectively during wear tests .The accumulated loss of weight was measured as a function of the number of revolutions, Wear rate was calculated, Effect of Microstructure and Hardness of Brass Alloys, The results show Wear rate for material B3 (CuZn6Ge) is less than that of the wear rate for B2 (CuZn4Ge), B1 (CuZn2Ge) under the same testing conditions.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
86
94
https://bfemu.journals.ekb.eg/article_102400_22798afe26b6124fb6cbaa0ee813f295.pdf
dx.doi.org/10.21608/bfemu.2020.102400
Qualitative and Quantitative Evaluation for Auxiliary Feed Water System at Pressurized Water Reactor (PWR).
Mohamed
Elbaz
Mansoura university Mechanical power department
author
Ahmed
Sultan
Mansoura university Mechanical power department
author
Tarek
Nagla
Mechanical power department,
Nuclear power plants authority
author
text
article
2020
eng
Nuclear power plant, nuclear industry and aerospace industry require a high level of safety so it is necessary to make risk assessment for these systems, subsystems and components. So, it is needed to take into consideration the components failure rate and its probability, and have qualitative and quantitative evaluation using fault tree analysis. The conducted study is aiming to make qualitative and quantitative evaluation for Auxiliary Feed Water system (AFWS) which is designed to supply feed water to the steam generators for Reactor Coolant System (RCS) heat removal in a case of loss of main feed water or loss of all AC (alternating current) power to the station auxiliary, (AFWS) consisted of two trains to single steam generator which achieve 100% capacity for each train, Complete redundancy and diversity achieved. Results show the qualitative evaluation of auxiliary feed water system, this qualitative assessment is supported by failure rate data of components to have quantitative evaluation, this study indicated the unavailability of the individual components and the total unavailability of the (AFWS) for 8760 hour. To be sure that the system is available during operation periods, test and repair periods must be obtain at its exact scheduled time.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
95
107
https://bfemu.journals.ekb.eg/article_102402_5b96187654431093a5604352a02e1bed.pdf
dx.doi.org/10.21608/bfemu.2020.102402
Noise Produced by Cavitation from various Cavitating Sources.
M.
Hosien
Mechanical Power Engineering Department, Faculty of Engineering, Menoufyia University, Shebin El-Kom Egypt
author
S.
Selim
Mechanical Power Engineering Department, Faculty of Engineering, Menoufyia University, Shebin El-Kom Egypt
author
text
article
2020
eng
In the present study the sound pressure measurements were obtained for five configurations, con. –div. wedge, circular cylinder, rear facing step, forward facing step and 60° symmetric wedge. For each configuration two sizes, 10 mm and 20 mm, were used. Spectrograms were recorded with a 1/3 octave band. A wide range of velocities and cavitation numbers were tested to observe its effect upon the noise. The results indicated that for all tested configurations, at constant flow velocity there was no clear relationship between the sound pressure level and cavitation number. The general trend was the sound pressure level increased as the cavitation number decreased reaching abroad peak and then decreased again. The sound pressure level was found to be strongly dependent on the flow velocity for the five configurations. For each configuration at fixed values of cavitation number there was a clear power relation between SPL and the flow velocity. The velocity exponent varied widely with both the cavitation number and cavitation source configurations, although not with cavitation source size. For instance, it is found that, for velocities ranging from 20-40 m / sec and constant cavitation source for 20 mm 60 symmetric wedge, the velocity exponent ranged from 2.3 to 6.2 depending on the cavitation number. The magnitude of the sound pressure level might be independent of the size of the cavitation source for all configurations tested except the con.-div. wedge. The velocity exponent for the broad band width was found to confirm the present theoretical results which indicate that the sound pressure level various at U4 at constant cavitation number.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
108
120
https://bfemu.journals.ekb.eg/article_102405_d521876973cf59a08f3922fb708a3794.pdf
dx.doi.org/10.21608/bfemu.2020.102405
Comparative Study on the Effect of Vegetable Based Cutting Fluid and Mineral Oil on Cutting Forces and Surface Roughness during Turning Operation.
I.
Elewa
Professor of Production Engineering, Faculty of Engineering , Mansoura university
author
Ahmed
Galal
Associate Professor at Production Engineering and Mechanical Design Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt
author
N.
Saker
Head of Oils and Additives Research Department, Research Center, Misr Petroleum Company.
author
A.
Abd El Tawab
Demonstrator, Production Engineering and Mechanical Design Dept., Faculty of Engineering , Mansoura university
author
text
article
2020
eng
Experimental Comparative study on the performances of both new developed environmental friendly vegetable based cutting fluids (sunflower, olive, coconut, linseed, and castor oils) and mineral oil-based cutting fluids during turning processes were reported in this work. Performances of cutting fluids were compared with respect to surface roughness and cutting forces during longitudinal turning of mild steel. Experimental results were also compared with results from dry cutting conditions. Different cutting conditions were used in this study. All vegetable based cutting fluids which were used in this comparison at cutting speed (955 rpm),depth of cut (1 mm) and feed rate (0.08 mm/rev) achieved a decrease in the values of cutting forces and average value of surface roughness compared with using mineral oil. Comparative study showed that mineral oil based cutting fluids can be replaced by the vegetable based cutting fluids in case of roughing and finishing operations, thus reducing the occupational health risks associated with petroleum oils based cutting fluids.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
121
131
https://bfemu.journals.ekb.eg/article_102407_9bf69a155f451d3aa28cc35c464401ce.pdf
dx.doi.org/10.21608/bfemu.2020.102407
Modeling of Head Loss through Deep Bed Sand Filters.
Hani
Mahanna
Teaching Assistant, Public Works Dept.,Faculty of engineering,Mansoura University, Egypt
author
Moharram
Fouad
Associate Professor, Public Works Dept.,Faculty of engineering,Mansoura University, Egypt.
author
Kamal
Radwan
Associate Professor, Public Works Dept.,Faculty of engineering,Mansoura University, Egypt.
author
Hoda
Elgamal
Professor, Public Works Dept.,Faculty of engineering,Mansoura University, Egypt.
author
text
article
2020
eng
Filtration is the main process in water treatment plant. In this process the water passing through some porous media (sand) to remove the suspended solids and impurities. In the beginning of filtration process, the head loss is small and it can be easily calculated by different empirical equations, but as the filter bed gets clogged, the head loss increases. The pilot plant was installed in sanitary engineering laboratory, Mansoura University. The operating conditions have five explanatory parameters. These parameters are filter depth, filtration rate, run time, influent turbidity, and alum dose. The filter depth was ranged from 80 to 140 cm and alum dose were ranged from 20 to 50 mg/lit. The rate of filtration was used in the range from 4 to 8 m/hr and the initial turbidities varied from 10 to 50 NTU. A mathematical model was obtained for head loss through deep bed sand filter with various operating conditions (filter depth, filtration rate, alum dose, run time, and initial turbidity).The proposed model yield highly accurate results with correlation coefficient (R2) of 0.88. The proposed model showed that the most significant parameters on predicted head loss are the run time and filtration rate. Also, the simple proposed model can be easily and effectively used as a decision supporting tool for prediction of filtration run length.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
1
10
https://bfemu.journals.ekb.eg/article_102444_22ba8f1f29ad8707d7986bfb07d31eee.pdf
dx.doi.org/10.21608/bfemu.2020.102444
Aerobic Treatment of Wastewater Using Hybrid System.
Kamal
Radwan
Associate Professor., Public Works Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.
author
Moharram
Fouad
Associate Professor., Public Works Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.
author
Ahmed
El-Say
Public Works Engineering Department., Faculty of Engineering.
author
text
article
2020
eng
A raw wastewater has been treated in wastewater treatment plant of Met Abo El-Kom city using attached growth systems. The treatment was accomplished using an Aerated Fixed Film Reactor (AFFR) with plastic plates or plastic plates with plastic mesh. The first reactor consisted of a number of biofilm carriers from fiber glass plates. Another modified (AFFAR) has been used by modifying the first one by attaching plastic mesh to enhance biofilm area. The system was run in the field for more than six months. Practically, the system consistsed of four stages as with bafflers at hydraulic loading rate (HLR) of 0.1 and 0.2 m3/m2/d. The results showed under HLR= 0.1 m3/m2/d for the first reactor has achieved a removal efficiency of 89%, 95%, 90% and 93% for COD, BOD5, NH3 and TSS respectively. However, the second modified reactor achieved high removal efficiency more than the first one because of the large biofilm area. The second reactor has achieved a removal efficiency of 94%, 98%, 95% and 97 for COD, BOD5, NH3 and TSS respectively. The influent BOD5 has been decreased from of 600 to 7 mg/l with removal percentage 98%. Removal of COD and SS was almost similar to that of BOD. The initial COD and SS of 800 mg/l and 510 mg/l come down to 71 mg/l and 20 mg/l respectively. In addition, the present study illustrated that use of biofilm carrier (plastic plates) improve the growth of biomass above surface area of plates and have a relative large surface area in small volume. Results also indicated that better removal efficiency can be obtained in case of low hydraulic loading rate of 0.1m3/m2/d especially for BOD5 and COD. While in case of modified AFFR the effluent improved BOD5, COD, NH3 and TSS removal.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
11
21
https://bfemu.journals.ekb.eg/article_102447_7014bddd5c4048424e1a799aa8e8cf39.pdf
dx.doi.org/10.21608/bfemu.2020.102447
Technical Evaluation of Using Grouting for Producing Semi-Flexible Asphalt Concrete Mixtures.
M.
Al-Taher
Professor, Public Works Engineering Department
, Faculty of Engineering, Zagazig University, Egypt.
author
A.
Mohamady
Associate professor, Public Works Engineering Department
, Faculty of Engineering, Zagazig University, Egypt.
author
M.
Attia
Lecturer , Public Works Engineering Department
, Faculty of Engineering, Zagazig University, Egypt.
author
M.
Shalaby
Assistant lecturer, Public Works Engineering Department
, Faculty of Engineering, Zagazig University, Egypt.
author
text
article
2020
eng
A noticeable shortage was occurred in the asphalt supply in the Egyptian Market due to the increasing volume of road construction projects in the current decade, which led to importing asphalt from foreign countries. Consequently, aggravates the problem of hard currency and increasing the local asphalt prices. Another serious problem has been also observed on unlimited number of newly constructed Egyptian roads, that is the rutting distress due to the increasing of both of percentage of goods truck and axle loads accompanied by the increasing of goods transported via the Egyptian highway networks. So, finding out a solution to develop mixtures that have lower asphalt contents and high resistance to the rutting becomes essential. This study aims at characterization and design special type of asphalt mixture having lower asphalt content and of higher rutting resistance to be used in paving surface layers. To achieve this objective, grouting technique of highly permeable asphalt mixtures produced under different compacting efforts was used. Crushed limestone, crushed sand, and limestone filler were used to prepare highly permeable asphalt mixtures. Asphalt contents of these mixes were determined theoretically. Marshall moulds representing these mixes were prepared and grouted using ordinary portland cement (OPC) as well as mixtures of OPC and silica sand with different ratios. Unconfined compressive strength (UCS), Marshall Stability, and indirect tensile strength tests were conducted on these mixes to define their characteristics. The same tests were conducted on crushed limestone traditional mix of 4C gradation for comparison purposes. Analyzing the study results, the active effect of grouting technique using each of OPC as well as mixture of 1: 1 OPC and silica sand was concluded. Reduction from 35% to 44 % of the required asphaltamount and increasing of rutting resistance for highly porous mixes through increasing UCS and stability by about 3 times compared with traditional asphalt mixtures.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
22
38
https://bfemu.journals.ekb.eg/article_102455_7d60c5df9cefb9463865e90b25b8c91f.pdf
dx.doi.org/10.21608/bfemu.2020.102455
Scour Downstream Sudden Expansion Stilling Basin.
Gamal
Abdel-Aal
Professor of Hydraulics, Water & Water Str. Eng. Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt.
author
Maha
Fahmy
Associate Professor, Water & Water Str. Eng. Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt.
author
Amany
Habib
Associate Professor, Water & Water Str. Eng. Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt.
author
Mohamed
Elbagoury
Demonstrator, Water & Water Str. Eng. Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt.
author
text
article
2020
eng
Local scour due to free hydraulic jump downstream hydraulic structures may cause damage or complete failure of these structures, so controlling of this phenomenon is very important. The main goal of this study is to reduce the characteristics of a scour hole downstream sudden expansion stilling basin. An experimental study was conducted to study the effect of expansion ratio and position of the sill. Ninety experimental runs were carried out considering the wide range of Froude numbers ranging from 3.42 to 8.67. Five values of the expansion ratio (e = 2.73, 1.92, 1.76, 1.50 and 1.25) and four values of the relative position of lateral single sill (Lx/LB = 0.20, 0.30, 0.40 and 0.50) were investigated. The dimensional analysis was employed to drive expressions correlating the different variables affecting the scour phenomena. It was found that, the flow patterns in most of the cases were a symmetrical and the resulting scour and deposition were also a symmetrical. The relative scour depth, the relative scour length and the relative energy loss, increase by increasing the initial Froude number and vice versa. The expansion ratio (e = 1.50) gives the minimum values of scour dimensions. The best location of the sill for reducing the scour dimensions at 0.30LB from the gate opening. Prediction equations were developed using the multiple linear regression (MLR) to model the relative scour depth Ds/y1 and the relative scour length Ls/y1.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
40
v.
4
no.
2020
39
49
https://bfemu.journals.ekb.eg/article_102461_775f5197b952a1939824c5334222c24c.pdf
dx.doi.org/10.21608/bfemu.2020.102461