eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
117
124
10.21608/erjm.2007.70046
70046
Original Article
OPTIMAL PLANNING AND OPERATION OF ACTUAL DISTRIBUTION SYSTEMS IN EGYPT USING A MULTI-OBJECTIVE GENETIC ALGORITHM
Adel A. Abou El-El
1
Gamal E. M. Ali
2
Abeer A. E. Shammah
3
Faculty of Engineering Minou$ya Universit
Faculty of Engineering Tanta Universi
South Delta Electricity Distribution Company SDEDC
This paper proposes procedures for optimal planning and operation of radial distribution systems (RDS). Optimal planning involves selection of the best cross-section of branches to be operated, such that the resulting RDS yields the desired performance for the existing and expanding load demand. A genetic algorithm (GA) is used to obtain the optimal branches of RDS by minimizing the sum of branch cost and present worth of the feeder energy costs, while keeping the voltage regulation within a prescribed limit and satisSying the growth factor. The multi-objective genetic algorithm (MOGA) is suggested to achieve more than one objective and satisfy the RDS constraints. After selection of the optimal branches, an optimal operation procedure of RDS is proposed using a distribution system software programming @SSP). This program is applied to obtain the optimal switched point to find the best radial reconfiguration system with minimum energy loss costs and satisfy the RDS constraints such as: branch voltage drop, thermal current carrying capacity and balanced power generation-load demand equation. Different studies are presented to illustrate the capability of the proposed optimal procedures using two real life power distribution systems.
https://erjm.journals.ekb.eg/article_70046_9e290147adaa408ca668eb9fbbab90ec.pdf
: Distribution system
Genetic Algorithm
Multi-objective genetic algorithm
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
125
131
10.21608/erjm.2007.70047
70047
Original Article
ENHANCEMENT OF THE PERFORMANCE OF A SUPERCONDUCTING GENERATOR USING FACTS
G. A. Morsy
1
H. A. Khattab
2
S. M. Osheb
3
A. Kinawy
4
Electrical Engineering Department, Faculty of Engineering, MinouJiya University, Shebin El-Kom, Egypt
Electrical Engineering Department, Faculty of Engineering, MinouJiya University, Shebin El-Kom, Egypt
Electrical Engineering Department, Faculty of Engineering, MinouJiya University, Shebin El-Kom, Egypt
Electrical Engineering Department, Faculty of Engineering, MinouJiya University, Shebin El-Kom, Egypt
The paper presents a technique for improving the performance of a superconducting generator (SCG). The technique is based on combining the effects of a fuzzy logic controller @LC) and a thyristor controlled static reactive power compensator (TCSR). The fuzzy controller requires two input signals and generates the output control signal. This signal is applied at the governor control loop of the SCG in order to accomplish a satisfactory damping for the SCG low frequency oscillations over a wide range of operating conditions. The TCSR is applied at the generator terminal bus bar to change the transmission system configuration, based on a controlled firing angle, for improving the system stability. The performance of the SCG equipped with fuzzy logic controller (FLC) has been studied and the results were obtained in a comparative form with and without using TCSR The results clearly reveal that inclusion of the TCSR is very significant to improve the system performance and to increase the power transfer capabilities.
https://erjm.journals.ekb.eg/article_70047_dbdaf228332fa3f7c342f490cace09f8.pdf
: Power system control Superconducting generator
Flexible AC Transmission System (TCSR)
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
133
141
10.21608/erjm.2007.70048
70048
Original Article
DYNAMIC PERFORMANCE ANALYSIS AND CONTROL OF A SWITCHED RELUCTANCE MOTOR FOR ELECTRIC VEHICLE APPLICATIONS
A. A. Abd El-Salam
1
Mohamed A. El-khazendar
2
Electrical Power and Machines Engin-eering Depar fment, Faculfy of E~gineering, Tanra University, Egypt
Electrical Power and Machines Engin-eering Depar fment, Faculfy of E~gineering, Tanra University, Egypt
The driving motor of an electric vehicle should satisfy its specific requirements of both starting and providing an extended speed range at constant power within operating constraints (e.g. acceleration and gradeability). This paper investigates the capability of the switched reluctance motor (SRM) for electric vehicle (EV) applications by introducing a suitable controller. The proposed controller uses a fixed as well as an adapted switching angles control schemes to maximize the machine overload capability. Both Turn-on angle and conduction angle have great influence on developed torque and they can be chosen to maximize the operating speed range and hence extends the constant power region essentially required for EV. A nonlinear analysis for an 816 SRM is developed and implemented in a simulation program based on Matlab/Simulink software package to investigate the motor dynamics. An experimentally measured flux linkagecurrent and static torque arrays are used to represent the machine data for simulation. The performance of SRM drive system with the proposed controller is introduced to study the effect of the proposed control scheme on current, torque, speed response and also constant power region. Motor currents and developed torques are obtained at different operating conditions and useful conclusions are obtained
https://erjm.journals.ekb.eg/article_70048_3c49dfb123eaf98d6fdf8c5fe33796ed.pdf
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
143
148
10.21608/erjm.2007.70049
70049
Original Article
ADAPTIVE MODEL FOR THREE-PHASE INDUCTION MOTOR USING NEURAL NETWORK
Mahmoud M. EL-kholy
1
Electrical Power andMachines Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt
This paper proposes a method for the modeling of induction motor using neural networks. The use of artificial neural networks (ANN) in this paper is due to their benefits such as fast computation, ability of implementation, and easy interpolation. The neural network is trained by an experimental data over a wide range of voltages, frequencies and load torques. At each value of frequency and applied voltage the motor is loaded from no-load to full load. Therefore, the training data cover all the possible operating range of the motor under different frequencies and voltages. The advantages of the proposed model using ANN, is that the knowledge of the electrical parameters of the motor is not necessary, and the change in these parameters with operating conditions doesn't effect on performance of motor model. The inputs of the ANN motor model are voltage, frequency and current and the model gives the motor speed, torque and efficiency as the outputs. By these three values another motor performance characteristics can be calculated. The proposed model with (ANN) can be used in speed and torque sensorless estimation depending on the motor inputs, which will give an efficient and better performance for an induction motor.
https://erjm.journals.ekb.eg/article_70049_052b93510b57d582866a94146ac1d8e4.pdf
Induction motors
induction motor modeling
induction motor control
induction motor variable speed and artificial neural networks
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
149
159
10.21608/erjm.2007.70050
70050
Original Article
CONTROL OF VORTEX INTERACTIONS IN A REATTACHING SEPARATED FLOW
Gamal H. Moustafa
1
Mechanical Power Engineering Department, Faculty of Engineering, Minoujya University, Shebin El-Kom, Egypt
Several experimental studies have shown that large scale orgamed vortex rings are produced in reattaching separated flows. Understanding of the interactions between these vortex rings are much important in the development of such flows in the downstream. An experimental work from a backward facing step have been made in the control of mixing by the use of techniques that affect the behavior of the vortex formed in the recirculating zone. Active controlling in the form of periodic flow perturbations caused by changing the step angle has been found to be effective in forming the flow over backward facing step by encouraging 1 &scouraging pairing of the large scale structures that are responsible for much of the entrainment. Also, such a technique allows higher pressure at the base and hence low base drag which may provide useful design guidance for perojectiles. A finite difFerence solution using boundary layer equations with marching technique was also performed for comparison with experimental results. A flow visualization gives some idea for the spreading of the flow over the step. Applying the present active mixing control technique leads to a shorter reattachment length and faster spreading which is particularly important in dump combustors, since a shorter recirculating zone allows a shorter overall design of the system.
https://erjm.journals.ekb.eg/article_70050_f73966a3dc8d0e8c4281b42f7d061157.pdf
backward facing step
recirculating zone
reattachment length
finite difference
flow visualization
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
161
175
10.21608/erjm.2007.70051
70051
Original Article
BEHAVIOR OF DIESEL FUEL INJECTION SYSTEM WHEN RUNNING WITH BIODLESEL
Safwat A. Wilson
1
MechanicaZ Power Engineering Department, Faculty of Engineering, MinouJiya University, Shebin EI-Kom, Egypt
The study aims to approach the performance of fuel injection system of diesel engines when using biodiesel as an alternative fuel. Mathematical model is proposed to simulate the fuel path through the injection system taking into consideration the compressibility effect, pressure waves in the pipeline, fuel properties and the leakage through clearance of moving parts. The model is compared with another experimental work for validation. The effect of biodiesel properties and its blends on the injection system behavior are examined. The results indicate that, when using biodiesel as an alternative fuel, the pressure waves propagating through the line diminished rapidly compared with conventional diesel oil. The results indicate also that, when using biodiesel, the leakage decreased because of its higher viscosity. As a result, the rate of pressure rise increases and the beginning of injection becomes earlier. It is important in this case to retard the injection timing to optimize the engine performance. On the other hand, the study shows that, the same atomization degree can be obtained when transformed to biodiesel by raising the injection pressure with certain ratios. These ratios depend on biodiesel blend percentage and compression ratio of the engine.
https://erjm.journals.ekb.eg/article_70051_7eb7e11275878a02838faf1dddc0592b.pdf
Fuel injection system
Biodiesel
mathematical model
compression ignition engines
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
177
187
10.21608/erjm.2007.70052
70052
Original Article
MODELING AIR CHARGE IN VARIABLE VALVE TIMING ENGINES
Safwat A. Wilson
1
Mechanical Power Engineering Department, Faculty of Engineering, MinouJya University, Shebin E-Kom, Egypt
Variable valve timing is a modern technique that aims to acquire the optimum air capacity at different operating conditions for internal combustion engines. The present work proposed a mathematical model to simulate the thermodynamic processes for motored engine including the air charge flowing through the intake manifold equipped with throttling valve. The pressure waves propagating through the intake manifold is considered. An experimental test rig consists of an engine equipped with measuring devices to record the engine speed, instantaneous cylinder and intake manifold pressure. Volumetric efficiency is estimated based on the experimental data at different engine throttling valve positions. The recorded data were compared with computational output in order to validate the proposed model. The model is used to address the effects of intake valve timing as well as throttling valve position at different engine speeds on the volumetric efficiency and equivalent compression ratio. The results show the importance of delaying the inlet valve closing angle with increasing engine speed to insure the best charge. The results show also remarkable effect of valve timing on the cylinder pressure. When delaying inlet valve closing angle, the effective compression ratio tends to decrease.
https://erjm.journals.ekb.eg/article_70052_613caa8006362ca2602f636418941a4c.pdf
Variable valve timing
intake manifold
air charge
pressure waves
volumetric efficiency
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
189
206
10.21608/erjm.2007.70053
70053
Original Article
BEHAVIOUR OF REINFORCED CONCRETE FLAT PLATES WITH DROP PARTS
Mohamed H. Matthana
1
Attia H. Bayomy
2
A.H. Abdel-Reheem
3
Ayman Mashaly
4
Structural Engineerr'ng Department, Faculty of Engineen'ng, EL-Mansoura University, Egypt
Structural Engineerr'ng Department, Faculty of Engineen'ng, EL-Mansoura University, Egypt
Structural Engineerr'ng Department, Faculty of Engineen'ng, EL-Mansoura University, Egypt
Structural Engineerr'ng Department, Faculty of Engineen'ng, EL-Mansoura University, Egypt
This paper presents both experimental and analytical investigations for the behaviour of flat plates provided with drop parts formed by partially decreasing both top and bottom fibers of the plate. The experimental study considers six plate specimens one of them is kept flat without any drop parts to be the control case. The other specimens are provided with drop parts having the same thickness of the plate while they are located at different locations of the plate. The locations of the drops parts considered in the present study are the intersections of two middle strips, two column strips and one middle-one column strips. All plates have the same thickness and the same aspect ratio of 1.0. The plate specimens are supported on four concrete short columns located at the four corners of the plate. The plates are subjected to uniformly-distributed flexural loading where the cracking loads, the cracking patterns in both sides after failure, and the ultimate load are reported. The Plate specimens are then taken up for a detailed nonlinear frnie element analysis where the various types of stresses are obtained. The cracking patterns and the loaddeflection behaviour are theoretically predicted for various plates. The study shows that the presence of drop parts in flat plates has a significant effect on the mode of failure of the plate while this effect depends on the location of the drop part. The stress distribution within the plate, the cracking and failure patterns and the load-deflection behaviour of various plate specimens are also sensitive to the presence of drop parts.
https://erjm.journals.ekb.eg/article_70053_e596d4d7002ef966e2d7859e0781f895.pdf
Reinforced concrete
Flat Slabs
Flat Plates
Plates
Drop Parts & Non-Linear Finite EIement
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
207
224
10.21608/erjm.2007.70054
70054
Original Article
EXPERINENTAL STUDY FOR THE BEHAVIOUR OF REINFORCED CONCRETE FLAT PLATES WITH DROP PARTS
Mohamed H. Matthana
1
Attia H. Bayomy
2
A.H. Abdel-Reheem
3
Ayman Mashaly
4
Structural Engineering Department, Faculty of Engineering, EL-Mansoura University, Egypt
Structural Engineering Department, Faculty of Engineering, EL-Mansoura University, Egypt
Structural Engineering Department, Faculty of Engineering, EL-Mansoura University, Egypt
Structural Engineering Department, Faculty of Engineering, EL-Mansoura University, Egypt
The present paper presents an experimental investigation for the behaviour of flat plates provided with drop parts formed by partially decreasing both top and bottom fibers of the plate. The experimental study has been carried out on sixteen plate specimens one of them is kept flat without any drop parts to be the control case, while the other specimens are provided with drop parts having the same thickness of the plate, while they are located at different locations of the plate. The locations of the drops parts, considered in the present study, are the intersections of; two middle strips, two column strips, and one middle and one column strips. All plates had the same thickness and the same aspect ratio of 1.0, while the main parameters in the study were the dimensions of the drop part, the drop height and the location of the drop part. The plate specimens were supported on four concrete short columns and subjected to uniformly-distributed flexural loading where the cracking load, the overall cracking patterns in both sides after failure and the ultimate load are reported. The steel strains at selected locations and the deflection at chosen points are also measured. The stdy shows that the presence of drop paxts in flat plates has a significant effect on the mode of failure of the plate while, this effect depends on the location and the size of the drop part. The deflections of the plate specimens at various measuring points and the strains developed in the reinforcing steel are also sensitive to the presence of such drop parts. The study brings out the surprising result that the load carrying capacity of plates with drop parts is relatively more than that of the flat plates without any drop parts.
https://erjm.journals.ekb.eg/article_70054_28d3bf733c8b9a617e628e94d44443ec.pdf
: Reinforced Concrete
Flat Slabs
mat Plates
Plates & Drop Parts
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
225
231
10.21608/erjm.2007.70055
70055
Original Article
EFFECT OF AGGREGATE SOURCE AND GRADATION ON THE RESILIENT BEHAVIOR OF BASES AGGREGATE
Abdulrahman ALSuhaibani
1
King Saud University, Riyadh, Saudi Arabia
The recent AASHTO Guide for the structural design of flexible pavement uses resilient modulus as the input property for different pavement layers. Different aggregate sources as well as the relatively wide range of gradation (as set by specifications of the Saudi Ministry of Transportation) of aggregates to be used for base layer make it necessary to study the effect of these two factors on the resilient behavior of these aggregates. Two models were used to describe the resilient behavior of tested aggregates. The main regression constants (K1 and K3) of both models were found to be significantly affected by aggregate type but not by aggregate gradation. Regression models were also developed to relate these constants to aggregates' physical properties.
https://erjm.journals.ekb.eg/article_70055_dd784d1858ebd864b7115ad269d68edf.pdf
Aggregate
Aggregate Type
Aggregate Gradation
Resilient Modulus
Aggregate Properties
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
233
240
10.21608/erjm.2007.70056
70056
Original Article
نظم المعلومات العمرانية: مفاهيمها، إشکاليتها، إمکانيتها
محمد عبد العزيز عبد الحميد
1
قسم الهندسة المعمارية - کلية الهندسة بشبين الکوم - جامعة المنوفية
يسعى هذا البحث إلى إلقاء الضوء على المفاهيم الأساسيةلنظم المعلومات العمرانية (الحضرية)
https://erjm.journals.ekb.eg/article_70056_05a1278d3cf61bb756e101f74d62a1e6.pdf
التخطيط العمراني
نظم المعلومات العمرانية
نظم المعلومات الجغرافية
التحليل البيئي لإدارة التخطيط
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
241
249
10.21608/erjm.2007.70057
70057
Original Article
المدى الزمني لبقاء المعلومات في ذاکرة طلاب العمارة (دراسة تطبيقية على طلاب مقرر نظريات العمارةبجامعة الملک سعود)
نوبي محمد حسن
1
قسم العمارة وعلوم البناء - کلية العمارة والتخطيط - جامعة الملک سعود - الرياض
يهدف البحث للتعرف على دور الذاکرة في التعليم المعماري.
https://erjm.journals.ekb.eg/article_70057_b1ce34a4643299999a6e6a8499e6e45b.pdf
الذاکرة
المدى الزمني
التعليم المعماري
نطريات العمارة
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
251
258
10.21608/erjm.2007.70059
70059
Original Article
A COMBINED APPROACH FOR TREATING MULTI-OBJECTIVE PROGRAMMING PROBLEM
Ahmed A. Elsawey
1
Taghreed A. Hassan
2
Basic Engineering Science Department, Faculty of Engineering, Minoufjya University, Shebin El-Kom, Egyp
Basic Engineering Science Department, Faculty of Engineering, Minoufjya University, Shebin El-Kom, Egyp
The main purpose of this paper is to introduce a comprehensive study of vector optimization problems (VOP). A new combined approach is developed for characterizing the efficient solutions of (VOP). This approach combines the characteristics of both Tchebycheff norm approach and K-th objective Lagrangian approach to form an improved scalarizing method for treating nonlinear multiobjective optimization problems. The Combined procedure is sensible because the Tchebycheff norm approach possesses complementary distinguishing characteristics for K-th objective Lagrangian approach. The theorems which characterize the efficient solutions of (VOP) in terms of this new combined approach are introduced. Also, some of the basic notions in parametric convex programming are redefined and analyzed for the new combined approach.
https://erjm.journals.ekb.eg/article_70059_76a910ed7cd34e1fd8215ddf359ca383.pdf
s Vector optimization
combined approaches
Tchebycheff approach
Lagrangan approach
Convex programming
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
251
258
10.21608/erjm.2007.70060
70060
Original Article
A COMBINED APPROACH FOR TREATING MULTI-OBJECTIVE PROGRAMMING PROBLEM.
Ahmed A. Elsawey
1
Taghreed A. Hassan
2
Basic Engineering Science Department, Faculty of Engineering, Minoufjya University, Shebin El-Kom, Egyp
Basic Engineering Science Department, Faculty of Engineering, Minoufjya University, Shebin El-Kom, Egyp
The main purpose of this paper is to introduce a comprehensive study of vector optimization problems (VOP). A new combined approach is developed for characterizing the efficient solutions of (VOP). This approach combines the characteristics of both Tchebycheff norm approach and K-th objective Lagrangian approach to form an improved scalarizing method for treating nonlinear multiobjective optimization problems. The Combined procedure is sensible because the Tchebycheff norm approach possesses complementary distinguishing characteristics for K-th objective Lagrangian approach. The theorems which characterize the efficient solutions of (VOP) in terms of this new combined approach are introduced. Also, some of the basic notions in parametric convex programming are redefined and analyzed for the new combined approach.
https://erjm.journals.ekb.eg/article_70060_d41d8cd98f00b204e9800998ecf8427e.pdf
s Vector optimization
combined approaches
Tchebycheff approach
Lagrangan approach
Convex programming
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
2007-04-01
30
2
259
266
10.21608/erjm.2007.70062
70062
Original Article
POTENTIOMETRIC AND THERMODYNAMIC STUDIES OF 5-PHENYL AZORHODANINE DERIVATIVES AND THEIR METAL COMPLEXES
M. F. El-Sherbiny
1
N. E. Salam
2
Basic Engineering Science Departmen Faculty of Engineering, Minoujya University, Shebin El-Kom, Egyp
Mathematical and Physical Science Dept., Faculty of Engineering, Mansoura University, Mansoura, Egypt
A series of 5-phenylazo-2-thioxo-4-thiazolidinone derivatives (L1-L5) have been prepared and characterized by elemental analysis, and IR spectra. Rhodanine and its derivatives are used as an inhibition of mycobacterium tuberculosis and in medicinal preparations . Azo compounds based on rhodanine play a central role as chelating agents for a large number of metal ions, as they form a stable six-membered ring after complexation with the metal ion and can also be used as analytical reagents. Proton-ligand dissociation constants of (L1-L5) and their metal-ligand stability constants of their complexes with (MI?, coZ*, Ni2+, CU~+,C~~+, La3+, FIT, and zr4+) metal ions have been determined potentiornettically in 0.1M KC1 and 40% (vlv) ethanol-water mixture. The influence of substituents on the dissociation and stability constants was examined on the basis of the electron repelling property of the substituent. The order of the stability constants of the formed complexes was found to be ~n'+< co2+< ~i'*< CU~"<C~~+< La3+< ~f3+< zr4+. The effect of temperature was studied and the corresponding thermodynamic parameters (AG, MI and AS) were derived and discussed. The dissociation process is nonspontaneous, endothermic and entropically unfavourable. The formation of the metal complexes has been found to be spontaneous, endothermic and entropically favourable.
https://erjm.journals.ekb.eg/article_70062_23b165f8ef21d49144a16a1700307c7c.pdf
5-Phenylazorhodanines
Potentiometry
Complexation
Thermodynamic