eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
1
7
10.21608/pserj.2014.45254
45254
Original Article
The Optimal Classification of Partial Discharge Defects within XLPE Cable by Using ANN and Statistical Techniques
Sobhy Dessouky
sobhyserry@yahoo.com
1
Adel El Faraskoury
dr.adel_elfaraskoury@yahoo.com
2
Samer El-Mekkawy
makkawy_06@hotmail.com
3
Waleed El Zanaty
waleed_elzanaty@yahoo.com
4
Department of Electrical Engineering – Port Said University, Port Said, Egypt
Adel A. El Faraskoury is with Egyptian Electricity Holding Company, Extra High Voltage Research Centre, Cairo, Egypt
S. M. El-Mekkawy is with Department of Electrical Engineering - Port Said University, Port Said, Egypt
Waleed M. Elzanati is with Department of Electrical Engineering - Port Said University, Port Said, Egyp
The classification of medium voltage cable defects is the most important tool to avoid the inaccurate Partial Discharge (PD) measurements. This paper presents a proposed methodology based on pattern recognition technique to classify the PD occurred in cables into two distinct groups: internal and external. The Artificial Neural Networks (ANNs) with different input schemes have been built to obtain the optimal classification. Many statistical features, which extracted by different techniques from measurements, have established the input schemes 3D-pattern PD to improve the performance and classification speed of ANN. In order to obtain the effective statistical features, the study and comparison between all ANN has been finished by evaluating the classification through two parameters: the mean square error (MSE) and the accuracy of neural network. As a result, the proposed approach provides high recognition rate of classification between internal and external PD within Cross-Linked Polyethylene (XLPE) insulated medium voltage cable
https://pserj.journals.ekb.eg/article_45254_c19f46cf4150d5a9c58c37e8346e454e.pdf
Partial Discharge
XLPE Power Cables
Pattern Classification
Neural network
Statistical features
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
8
16
10.21608/pserj.2014.45256
45256
Original Article
Sensor and Sensorless Speed Control of Doubly Fed Induction Generator Wind Turbines for Maximum Power Point Tracking
Fathy Abd Elkader
fatkader2@yahoo.com
1
Basem Elhady
basem_elhady@yahoo.com
2
Ahmed Kalas
kalas_14@yahoo.com
3
Electrical Engineering Department Faculty of Engineering ,Monofia University, Monofia, Egypt.
Electrical Engineering , Faculty of Engineering, Suez Canal University, Ismailia,
Faculty of Engineering – port said university
Wind turbine output power can be maximized using maximum power point tracking (MPPT). By estimating wind speed, the MPPT can be achieved easily by adjusting the speed of DFIG based wind turbine through back-to-back converter. The grid side unity power factor can be simply achieved using PI controller on hybrid inverter. The aerodynamic power captured by wind turbine is the cosine function of pitch angle. In this paper, the pitch angle is kept zero, which is a valid assumption for lower to medium wind velocities .The machine side converter (MSC) is used to track the maximum power point for different wind speed. The grid side converter (GSC) uses a vector current controller to supply power at unity power factor to the grid. The simulations have been performed using MATALB/SIMULINK. The effectiveness of proposed control methods validated
https://pserj.journals.ekb.eg/article_45256_4de9530669520dfcf2ae646150cdd6a0.pdf
Maximum PowerPoint Tracking (MPPT)
doubly fed induction generator (DFIG)
Variable speed wind turbine (VSWT)
Wind energy
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
17
24
10.21608/pserj.2014.45259
45259
Original Article
Testing and Evaluation of Transmission Line Relays Using Advanced Tools
H Saber
1
H Mostafa
2
E Shehab Eldin
3
F Khalifa
4
Helwan University, Faculty of industrial education, Dept. of Electrical, Cairo, Egypt
Suez Canal University, Faculty of Industrial Education, Dept. of Electrical, Suez, Egypt
Helwan University, Faculty of engineering, Dept. of Electrical Power and Machines, Cairo, Egypt
Suez Canal University, Faculty of Industrial Education, Dept. of Electrical, Suez, Egypt
Protective relays are important parts of the power system. The objective of the protection in power systems is to eliminate faults or unacceptable operating conditions for a component and related effects on the network. Fault elimination is usually done by isolation of the affected component. There are various types of faults, a special category are faults on generators (e.g. under excitation). But all other common transmission components are exposed mostly to faults as overvoltage and most of all over current, which is more commonly referred to as short-circuit. To ensure consistent reliability and proper operation, protective relay equipment must be evaluated and tested. The importance of the relay evaluation issue is linked to capability to test the relays and relaying systems using very accurate waveform representation of a fault event. The purpose of testing protective relays is to ensure correct operation of the relay for all possible power system conditions and disturbances. To fulfill this purpose, relay testing in varying network configurations and with different fault types is required. This paper describes a methodology in testing relays by using advanced digital simulator hardware
https://pserj.journals.ekb.eg/article_45259_4dacbb71c44149447ed04fdfdab5748b.pdf
The importance of the relay evaluation issue is linked to capability to test the relays and relaying systems using very accurate waveform representation of a fault event
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
25
31
10.21608/pserj.2014.45262
45262
Original Article
THEORETICAL AND EXPERIMENTAL INVESTIGATION OF DC SERVO-MOTOR
Shereen Elsayed
shereenfayad@yahoo.com
1
Sobhy Dessouky
sobhyserry@yahoo.com
2
Hossam Attia
hossam65eg@yahoo.com
3
Electrical Power, and Machines Department, Faculty of Industrial Education, Suez University, Suez, Egypt, E-mail
Department of Electrical Engineering – Port Said University, Port Said, Egypt
4Electrical Engineering ,Faculty of Industrial Education Suez University ,Suez, Egypt
In this paper the proportional integral derivative (PID) controller is designed and used to control the DC servo motor. The PID parameters are optimized by the trial and error method. The controller is verified on the loaded DC servo motor by SIMULINK program. The controller SIMULINK model is verified experimentally. Acceptable agreement is obtained between theoretical and experimental results. Simulation and experimental results verify the effectiveness of the PID controller of the DC servo motor.
https://pserj.journals.ekb.eg/article_45262_c0a0362291e95eca5ea3573edd1e43d4.pdf
DC Servo Motor
Proportional-Integral- derivative
Ziegler-Nichols method
Particle Swarm Optimization
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
32
41
10.21608/pserj.2014.45265
45265
Original Article
Fault response of grid-connected squirrel cage wind-power induction generator
Nagwa Fadi
eng.nagwafadl@yahoo.com
1
Ali Alaboudy
ali_hkasem@yahoo.com
2
Hossam Attia
hossam65eg@yahoo.com
3
Sobhy Dessouky
sobhyserry@yahoo.com
4
Electrical Power, and Machines Department, Faculty of Industrial Education, Suez University, Suez, Egypt,
Electrical Department, Faculty of Industrial Education, Suez University, Suez, Egypt
4Electrical Engineering ,Faculty of Industrial Education Suez University ,Suez, Egypt
Department of Electrical Engineering – Port Said University, Port Said, Egypt
This paper presents fault response of squirrel cage induction generator through grid connected of wind power. Thus, the Squirrel Cage Induction Generator (SCIG) is connected to an infinite bus through delta grounded wye transformer, transmission line and load. The capacitance compensation will be installed. The simulation model of grid connected squirrel cage wind power induction generator is discussed in the stationary reference frame using (MATLAB/SIMULINK). Simulations results have been investigated by various symmetrical and unsymmetrical faults. The fault is applied to the induction generator terminals. The paper introduces various types of algorithms to calculate the currents, frequencies and voltages in order to protect the wind driven induction generator connected to a power system grid.
https://pserj.journals.ekb.eg/article_45265_604f42390ea8612336a5eb3a747456bb.pdf
squirrel cage induction generator (SCIG)
short-circuit
fault
protection Algorithms
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
42
50
10.21608/pserj.2014.45282
45282
Original Article
Simulation Study of Screw Micro Pumps Design and Performance
Increasing efforts are being directed towards applying the technologies of micro-fluidic, to the development of micro-devices for a wide range of applications such as medical, biological, engineering and related technologies. The present studies are interested with the design of micro-screw pump for viscous fluid and its operating behaviour, the steady performance of the micro-pump will be investigated numerically. The present numerical investigation is a comparative study of a steady flow behavior in a micro-channel with rotating screw with different operation and design parameters. The numerical investigation is performed using computational fluid dynamic techniques. The FLUENT program as CFD simulation program in the ANSYS 14.0 package used to simulate the pump model. The results of the simulation problem give an agreement with literature experimental results which validate the simulation model that encourage future simulation of the studied system. Theoretical analysis by is carried out to study the influence of the helix angle, diameter of the screw, screw length and the thread height (flight depth) to evaluate the optimal dimensions for the pump to obtain the maximum flow rate and pump performance The effect of screw angular velocity and pump load were studied
https://pserj.journals.ekb.eg/article_45282_ac2dd24639bf3538bd04ce5fd3b1dada.pdf
Micro-pump
Screw thread
Screw diameter
Helix angle
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
51
58
10.21608/pserj.2014.45286
45286
Original Article
Technical and Environmental Improvements of LNG Carrier's Propulsion Machinery by Using Jatropha Bio - diesel fuel
Esaid Hegazy
1
Mohamed Mousad
2
Adil Tawfik
3
Mohamed Hassan
4
Mohamed Abas
5
Professor Of Naval Arch. And Marine Eng. Dept., Faculty Of Eng., Port Said Univ
Professor Of Naval Arch. And Marine Eng. Dept., Faculty Of Eng., Port Said Univ
Professor Of Naval Arch. And Marine Eng. Dept., Faculty Of Eng., Port Said Univ
Professor Of Marine Eng. Dept, Faculty Of Eng. And Tech., Aast
Lecturer In College Of Marine Transport, Aast
Modern dual fuel engine is looking for a new alternative fuel because of the higher prices and lower production of diesel. Jatropha biodiesel is a promising substitute as an alternative fuel has gained significant attention due to the predicted shortness of conventional fuel and environmental concerns. The operating test values obtained from the Jatropha oil is closely matched with the values of conventional diesel and can be used in the existing diesel engine without any modification. This paper studies the most promising propulsion alternatives of future Liquefied Natural Gas (LNG) carriers running by dual fuel engine used boil off natural gas (BOG) from LNG carriers cargo tanks vessels as main fuel and Jatropha biodiesel oil as pilot fuel. An experimental investigation was performed to investigate the influence of dual-fuel combustion on the performance and exhaust emissions of a direct injection (DI) diesel engine fueled with Jatropha oil and natural gas (NG). A single cylinder diesel engine was set up and arranged to measure and study the engine performance at all running parameters. The test rig aims to simulate the operating conditions of BOG in propulsion machinery of LNG carriers. The present investigation studies the engine performance and emissions experimentally at different loads to obtain the best load condition by using natural gas and Jatropha biodiesel oil. The obtained results showed that the thermal and volumetric efficiency of diesel engine is higher than Jatropha biodiesel engine. The specific fuel consumption, exhaust gas temperature, HC, CO2 and NO were comparatively higher in Jatropha biodiesel. While an appreciable increase in cylinder pressure and CO emission when using diesel. It was observed that the combustion characteristics of the Jatropha biodiesel followed closely with that of the base line diesel. This means that, Jatropha biodiesel can be used instead of diesel fuel oil with safe engine operation.
https://pserj.journals.ekb.eg/article_45286_5cee6c0910fe58f8aa4edf84a270829d.pdf
Dual fuel diesel engine
Natural gas
Jatropha oil, Dual fuel combustion emissions
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
52
66
10.21608/pserj.2014.45291
45291
Original Article
Transport Accessibility: A Tool for Identification of Activity- Based Destination Choice Model for Port-Said City, Egypt
Marwa El-Bany
1
Mohamed Shahin
2
Ibrahim Hashim
3
Mohamed Serag
4
Assistant lecturer of Transportation and Traffic Eng., Faculty of Engineering, Port-Said University, Egypt.
Professor of Transportation and Traffic Eng., Faculty of Engineering, Alexandria University, Egypt.
Associate professor of Transportation and Traffic Eng., Faculty of Engineering, Menoufia University, Egypt
Associate professor of Transportation and Traffic Eng., Faculty of Engineering, Port-Said University, Egypt
The destination choice is an essential step of the travel demand modeling. Many previous studies were concentrated onland use which means that the utilization of land for different activities such as residential, commercial, industrial,educational, etc. is linked with travel demand. Accessibility is often seen to be an important determinant of the activitiesdestination choice. This study is concerned with using the accessibility concept to investigate the utility function of theactivity destination choice. A case study is Port Said (PS) City in Egypt. The characteristics of time, cost, and incomelevel are obtained from activity based comprehensive transportation surveys. The benefit or utility of choosing aspecific activity (BM values) are estimated based on the calculation of accessibility benefit from time-space geographymeasures for different zones in PS. Binary and Multinomial logit models were used for daily activities performed byindividuals. During different time segment, the model predicts individual probability of choosing one of the followingfive activities: work, shopping, school, university, and Leisure. The accessibility benefits are examined associating withdecreasing travel time (public transport-oriented development), improving income level for poor, and restricting car use.Finally, the model approved to be sensitive to different measures and hence it can be used as an effective informativetool to the decision makers.
https://pserj.journals.ekb.eg/article_45291_a0600360a7ddc9ac00aead86cec19284.pdf
Accessibility-Benefit
Destination Choice
Activity-Based (AB) model
Utility Function
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
67
75
10.21608/pserj.2014.45292
45292
Original Article
Analytical Solution Developed for Optimizing Double-Pipe Flow Systems
Mohamed Somaida
m.somaida@yahoo.com
1
Faculty of Engineering, Port Said University
In the present study an equation has been developed to estimate the optimal design diameters of double-pipe flow systems . The equation is based on hydraulic and economic considerations and is applicable in annular flow turbulent regions. The equation is tried on data obtained from an experimental work , conducted on a specified annular flow system . The equation gives good results as illustrated from computations and has revealed that, considerable reductions have been achieved in pipe, pumping and pump costs by the selection of the optimal diameters of the double-flow pipe system
https://pserj.journals.ekb.eg/article_45292_a7ee95c3db6815a549862858e111f031.pdf
Annular flow
Pipe cost
Pump and pumping costs
Annulus friction factor
equivalent diameter
Optimization
Optimal design-diameter ratio
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
91
98
10.21608/pserj.2014.45293
45293
Original Article
Analytical Solution Developed For Predicting Transient Interface in Coastal Unconfined Aquifers
Mohamed Somaida
m.somaida@yahoo.com
1
Faculty of Engineering, Port Said University
For predicting fresh-salt water interface in unconfined coastal aquifers, an equation has been developed to estimate the advance of interface which depends on; the densities of fresh and salt water, the hydraulic properties of the aquifer and the flow velocity components at the boundaries of the aquifer. The developed equation is tried in Sidi Kreir Locality, 32 km west of Alexandria (north-western coastal zone), constituting a coastal unconfined aquifer. The values for advance of interface estimated by the developed equation are compared with those computed using Ghyben-Herzberg relation and are found to have an order of magnitude agreement and are of nearer values. The developed equation is considered advantageous because it considers the hydraulic properties of the aquifer as well as the laws governing the potential flow of two liquids in the porous medium. Assessment of the goodness of the fitting of the compared values for advance of interface shows that; the analytical solution developed, seems to be successful procedure for predicting the movement of the fresh-salt water interface in coastal unconfined aquifers existing in favorable areas
https://pserj.journals.ekb.eg/article_45293_3270dc2caed2f8e647e09de98f8b1bac.pdf
Coastal unconfined aquifer-Water table- Predicting- Transient Interface- Velocity Potential- Goodness of Fitting
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
76
81
10.21608/pserj.2014.45294
45294
Original Article
Analytical Solution Developed for Predicting Transient Interface in Coastal Confined Aquifers
For predicting the transient fresh-salt water interface in confined coastal aquifers, an equation has been developed to estimate the advance of interface. The equation depends on; the densities of fresh and salt water, the hydraulic properties of the aquifer and the rate of flow of groundwater in the fresh-water region. The developed equation is applied on a confined aquifer example to compute the average advance of interface. The estimated analytical value is found to have the same order of magnitude and nearly equal to the value estimated using the Ghyben-Herzberg relation, where the deviation is about 0.02. The agreement is considered satisfactory, since the developed equation considers the hydraulic properties and the actual hydrological conditions of the aquifer. However, the developed analytical solution seems to be successful procedure to be applied for predicting the transient interface in confined coastal aquifers.
https://pserj.journals.ekb.eg/article_45294_b9812f5f6e49a8795a4442c1cf2288ad.pdf
Confined coastal aquifer
analytical solution
prediction
transient interface
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
81
90
10.21608/pserj.2014.45295
45295
Original Article
Solving the Upconing Pumping Problem and Hydrodynamic Dispersion in Coastal Unconfined Aquifers
In the present study, the salt-water up coning problem in coastal unconfined aquifers is investigated. The dimensional analysis is used to provide information about the optimum well depth and the optimum pumping rate for a well suggested to be partially penetrating a coastal unconfined aquifer example. The Bear and Todd’s method of superimposing the effects of hydrodynamic dispersion on the up coning system, is used to predict the concentration profile with depth below the pumped example well at a workable dispersivity of the aquifer. The results shows that, the concentration of pumped water is still suitable for irrigation under certain conditions. Comparison of the estimated salinity profile for the example well , with the measured salinity profile in a neighboring well drilled in the same area, indicates an order of magnitude agreement. The results encourage the use of the present solution methodology of the up coning pumping system problem as it seems to be extremely useful in the cases where the dispersion measurements are unavailable in the studied aquifer
https://pserj.journals.ekb.eg/article_45295_5abe3b49ebe68350f57b9b4f17556434.pdf
Well drawdown
Radius of Influence
interface
Permissible Well Discharge
Dispersion Coefficient
Dispersivity
Transition Zone
Salt-Concentration of Groundwater
Coastal areas
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
99
108
10.21608/pserj.2014.45296
45296
Original Article
EXPERIMENTAL INVESTIGATION OF STRENGTHENED SHORT CONCRETE COLUMNS
KHALED MAHMOUD
1
HASSAN HASSAN
2
KAMAL SHAROBEM
3
1Graduate student, Suez Canal Authority, Port Said, Egypt
Professor of concrete structures and the Chief Head of Civil Engineering Department at Port Said University, Port said
Reinforced concrete (RC) columns in buildings often need strengthening either due to defects in the columns themselves, having to support higher loads than those foreseen in the initial design of the structure, or as the result of ageing or accidental damage. There are many methods of columns strengthening such as jackets with their different types. Jackets are often performed at construction sites by primitive methods, without taking into consideration the correct design or the requirements which should be implemented. At this research, two methods of strengthening have been studied experimentally: concrete jacketing and steel cage. The experimental study consisted of twenty specimens of 800 mm height, 100x100 mm cross section, and main reinforcement 4Ø6 mm with stirrups 7Ø4 mm/800mm. The specimens were strengthened by concrete and steel jackets. From the results of obtained capacity and mode of failure, some modifications were implemented on jacket to improve the efficiency of jackets.
https://pserj.journals.ekb.eg/article_45296_a777ae9c387d03192be776251d022694.pdf
RC columns
strengthening
concrete jacket
steel jacket
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
109
116
10.21608/pserj.2014.45297
45297
Original Article
Framework to Support Architectural Sustainability using Biomimicry (The Second Level
Merhan Shahda
m.shahda@eng.psu.edu.eg
1
Ashraf Elmokadem
2
Mostafa Abd Elhafeez
3
Assistant lecturer in the Architecture and Urban Design Department, Faculty of Engineering, Port Said University
Professor of Architecture and Urban Design Department, Faculty of Engineering, Port Said University
Through the study and analysis of the second level to Biomimicry, and try to exploit ways of the organism adapting with its environment, has been reached for the approaches. In this framework, research paper deals with an analysis for the main principles of environmental sustainability in the nature. Research proposed division environmental sustainability principles derived living organisms adapt with nature to four approaches. The aim of this research to submit a proposal for The methodological framework of using the second level of the Biomimicry levels to support architectural sustainability.
https://pserj.journals.ekb.eg/article_45297_22e5fedd24418a544aea847816062548.pdf
Biomimicry
Sustainability
eng
Port Said University, Faculty of Engineering
Port-Said Engineering Research Journal
1110-6603
2536-9377
2014-09-01
18
2
117
125
10.21608/pserj.2014.45298
45298
Original Article
Biomimicry Levels as an Approach to The Architectural Sustainability
Certainly nature was and still the first teacher to humans and the main inspiration. Nature is a source of inspiration for architects as it is for scientists, for example: its consider source of inspiration for structures, building materials and systems of environmental and aesthetics. There aren‟t enough studies to conclude and devise solutions from nature to all areas of science and architecture. Branch of knowledge appeared called “Biomimicry” which mean (Nature Simulation) is an innovation method that seeks sustainable solutions by emulating nature's time-tested patterns . In this framework, research paper deals with nature as inspiration concept, Biomimicry concept, Biomimicry levels and approach in the field of architecture and The research presents a number of questions and try to answer them : What is Biomimicry? What are the Biomimicry Levels? How can use the Biomimicry to support Architectural sustainability ?????
https://pserj.journals.ekb.eg/article_45298_b668788516686388814ecca068311d80.pdf
Biomimicry
Sustainability