UNIT COMMITMENT PROBLEM WITH RAMP RATE CONSTRAINT USING NEW HYBRIDIZED ADAPTIVE OPTIMIZATION METHOD
Ehab E.
Elattar
Department of Electrical Engineering, Faculty of Engineering,
Menoufiya University,
author
text
article
2015
eng
Solving unit commitment (UC) problem is one of the most critical tasks in electric power systemoperations. Therefore, proposing an accurate method to solve this problem is of great interest. Theoriginal bacterial foraging (BF) optimization algorithm suffers from poor convergence characteristics for larger constrained optimization problems. In addition, the stopping criterion used in the original BF increases the computation burden of the original algorithm in many cases. To overcome these drawbacks, a hybridized adaptive bacterial foraging and genetic algorithm (HABFGA) approach is proposed in this paper to solve the unit commitment problem with ramp rate constraint. The HABFGA approach can be derived by combining adaptive stopping criterion, BF algorithm and genetic algorithm, so that the drawbacks of original BF algorithm can be treated before employing it to solve the complex UC problem. To illustrate the effectiveness of the HABFGA approach, several standard and real test systems with different numbers of generating units are used. The results of HABFGA approach are compared with the results obtained using other published methods employing same test systems. This comparison shows the effectiveness and the superiority of the proposed method over other published methods.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
241
250
https://erjm.journals.ekb.eg/article_66846_8c295cdfcd28755cf2c77ac30c00a1b8.pdf
dx.doi.org/10.21608/erjm.2015.66846
HYBRID SHUFFLE FROG LEAPING ALGORITHM AND GENETIC ALGORITHM FOR ECONOMIC LOAD DISPATCH WITH WIND POWER UNITS
Ehab E.
Elattar
Department of Electrical Engineering, Faculty of Engineering,
Menoufiya University
author
text
article
2015
eng
Economic load dispatch (ELD) problem considering valve point effect and wind power is a large scale mixed-integer nonlinear problem. Solving this problem is one of the critical tasks in electric power system operation. So, proposing an accurate method to solve this problem is of great interest. Shuffle frog leaping algorithm (SFLA) is recently proposed to solve many optimization problems but it has some problems. It is often being trapped in local optima. In this paper, a hybrid shuffle frog leaping algorithm and genetic algorithm (HSFLAGA) is proposed to solve this problem. The proposed algorithm can be derived by combining the SFLA and genetic crossover and mutation operators so that the drawbacks of original SFLA algorithm can be treated before employing it to solve the ELD problem with valve point effect and wind power. To show the effectiveness of the HSFLAGA algorithm, several test systems with different numbers of generating units are used. The results of the proposed HSFLAGA algorithm are compared with those obtained by other published methods employing same test systems. The obtained results prove the efficiency and the superiority of HSFLAGA algorithm over other published methods.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
251
259
https://erjm.journals.ekb.eg/article_66847_9d3274b46eaa13844197c83b1f7bbf53.pdf
dx.doi.org/10.21608/erjm.2015.66847
REACTIVE POWER PLANNING CONSIDERING TRANSFORMER CAPACITY RELEASE USING DIFFERENTIAL EVOLUTION
Abdullah M
Shaheen
South Delta Electricity Distribution Company (SDEDCo), Ministry of Electricity,
Tanta, Egypt.
author
Ragab A
El-Sehiemy
Electrical Engineering Department, Faculty of Engineering, Kafrelsheikh
University, Egypt.
author
Sobhy M
Farrag
Electrical power systems, Electrical Engineering Department, Faculty
of Engineering, Menoufiya University, Egypt.
author
text
article
2015
eng
This paper proposes a new formulation of the reactive power planning (RPP) problem. Objectives are: achieving the minimum investment cost of new injected shunt power capacitors (SPCs),maximizing the savings due to release MVA transformers capacity through transmission network,and minimizing the operation costs of power losses. These three objectives are handled as a multiobjective RPP problem using the mathematical sum approach while satisfying the equality and inequality constraints. For solving this RPP formulation, the proposed approach employs a new variant of differential evolution algorithm (DEA) (DE/best/1) which has a high capability of global search exploitation and fast convergence. The proposed approach is examined and tested on the West Delta region (WDN) system as a part of the Egyptian Unified network with different objective functions. The simulation results demonstrate the potential implementation of the proposed DE variant and show its effectiveness to solve the RPP problem.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
261
267
https://erjm.journals.ekb.eg/article_66848_b785c2a200a4c23e3972a3978eb2efb3.pdf
dx.doi.org/10.21608/erjm.2015.66848
FUTURE SUSTAINABLE CONCENTRATING SOLAR POWER TECHNOLOGIES: A REVIEW
A.M.K
El-Ghonemy
High Institute of Engineering and Textile Technology, Egypt
author
text
article
2015
eng
Concentrating solar thermal power is a renewable energy (RE) technology which converts solar irradiation into heat energy at high temperature and in a successive step into electricity. The core part is a number of mirrors which reflects direct normal irradiance (DNI) to a focal line or point, called a receiver. Temperatures up to 1000 oC can be achieved. These plants make use of conventional steam cycles, in which hybrid operation with fossil fuels is applicable. The key advantage of CSP in comparison to other RE technologies is that the need for fossil fuel can be reduced by over sizing the solar collector field and storing the extra heat. This paper is directed to provide a comprehensive review of CSP technologies that are sustainable for applications in MENA region. More focus was directed to the performance data with emphasis on technologies, economics and costs. A comparative study between different CSP technologies as well as performance and economics has been done. Finally, some general guidelines are given for the selection CSP systems and the parameters that are needed to be considered for decision makers.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
269
284
https://erjm.journals.ekb.eg/article_66850_5fb5771cdd3ea6274d73666cf96eee41.pdf
dx.doi.org/10.21608/erjm.2015.66850
FUTURE SUSTAINABLE CONCENTRATING SOLAR POWER TECHNOLOGIES: A TECHNO-ECONOMICAL STUDY
A.M.K
El-Ghonemy
High Institute of Engineering and Textile Technology, Egypt
author
text
article
2015
eng
The present study is a continuation of a previous work which titled by “Future sustainable Concentrating Solar Power (CSP) technologies: a review”. Electricity production, HVAC and the production of safe drinking water constitute the major needs of developing countries. Consequently, the bulk of this new CSP capacity is expected to be seen in the MENA region, where it has abundant solar radiation, cheap land and high electricity demand. In this paper, the techno-economical study of using large scale CSP plant for electricity generation in Riyadh, KSA is investigated. Two cases are proposed for present and future applications. The first case (Case-1) is using parabolic trough (PT) solar field coupled with steam turbo-generator rated at capacity of 100MWe.The second case (Case-2) is using Solar tower/heliostats solar field coupled with gas turbo-generator at rated capacity of 100MWe system which is proposed for future application in desert areas. Then a parametric study was done to investigate the best economic TES hours for both cases. Finally the optimum condition of both cases is compared. The results showed that the estimated average annual electricity is 363,892 MWhe, 341,456MWhe for case-1and case-2 respectively. Thus achieving a conversion efficiency of 18.67%, 14.87% for case-1 and case-2 respectively. The financial results showed that: for case-1, LCOEnominal is 16.97, 21.8Cent/KWhe at interest rate of 3%, 6% respectively. While for cas-2: the LCOEnominal is 15.54, 19.68 Cent/KWhe at interest rate of 3%, 6% respectively, which is still high comparing to the current electricity cost in KSA. Also, the minimum LCOE was obtained at 6hrs thermal energy storage for both cases. Finally, when carrying out feasibility studies for CSP plants, attention must be paid to fund at low interest rate, and local manufacturing for some items of the solar field. This can achieve a significant reduction in the LCOE.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
285
297
https://erjm.journals.ekb.eg/article_66851_fe56fe15f235183e359cab331a9ae418.pdf
dx.doi.org/10.21608/erjm.2015.66851
NUMERICAL PREDICTION OF AIR-PARTICLES FLOW IN VERTICAL PIPES
Samy M
El-Behery
Mechanical Power Engineering Department,
Faculty of Engineering, Menoufyia University,
Shebin El-Kom, Egypt.
author
A. A.
El-Haroun
Mechanical Power Engineering Department,
Faculty of Engineering, Menoufyia University,
Shebin El-Kom, Egypt.
author
M. R
Abuhegazy
Mechanical Power Engineering Department,
Faculty of Engineering, Menoufyia University,
Shebin El-Kom, Egypt.
author
text
article
2015
eng
This paper presents a steady state one-dimensional two-fluid model for gas-solid two-phase flow in a vertical raiser. The model is solved using conservative variable approach for the gas phase and fourth order Runge-Kutta method is used for the solid phase. The model predictions for pressure drop are compared with available experimental data and with Eulerian-Lagrangian predictions and a good agreement is obtained. The results indicate that the pressure drop increases as the solid mass flow rate, particle size and particles density increase. In addition, the model predictions for minimum pressure drop velocity are compared with experimental data from literature and the mean percentage error, MPE for minimum pressure drop velocity is -9.89%. It is found that the minimum pressure drop velocity increases as the solid mass flow, particle size and particle density increase while it decreases as the system total pressure increases.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
299
307
https://erjm.journals.ekb.eg/article_66852_f227fe486f3d250d5743ba01ed54283c.pdf
dx.doi.org/10.21608/erjm.2015.66852
EXPERIMENTAL AND NUMERICAL STUDIES ON WATER FLOW THROUGH RECTANGULAR CROSS-SECTIONAL AREA S-SHAPED DIFFUSERS
K. A
Ibrahim
Mechanical Power Engineering Department, Faculty of Engineering,
Menoufiya University, Shebin El-Kom, EGYPT
author
W. A
El-Askary
Mechanical Power Engineering Department, Faculty of Engineering,
Menoufiya University, Shebin El-Kom, EGYPT
author
I. M
Sakr
Mechanical Power Engineering Department, Faculty of Engineering,
Menoufiya University, Shebin El-Kom, EGYPT
author
Hamdy A
Omara
Higher Institute of Engineering &Technology, Arish, North Sinai
author
text
article
2015
eng
The paper presents comprehensive experimental and numerical studies on water flow through rectangular S-shaped diffusers. The experimental setup was designed and constructed to perform the measurements which have been carried out on twelve models of S-shaped diffusers. The measurements of pressure distributions along the outer and inner walls of the S-shaped diffuser were performed for different parameters including area ratios, curvature ratios, inflow Reynolds numbers, turning angles (45◦/45◦, 60◦/60◦, 90◦/90◦), and flow paths (45◦/45◦, 60◦/30◦, 30◦/60◦). The energy-loss coefficients for each model are based on detailed measurements of the wall pressure distributions along walls of the S-shaped -diffuser models including long upstream and downstream tangents. The energy-loss coefficient data were plotted as a function of Reynolds number for the tested models at different geometrical parameters. The experimental data for different S-diffuser configurations have been used for assessing credibility of the numerical code using different turbulence models. High performances of computations with turbulence closure provided bythe standard k-ε model have been carried out for prediction of the performance of S-diffusers at different inflow and geometrical conditions. The results showed that the diffuser energy-loss coefficient is strongly affected by the geometrical parameters of S-shaped diffuser and inflow Reynolds number. Increasing area ratio, curvature ratio, and inflow Reynolds number increase the diffuser performance. The turning angle plays an important role in improving the S-shaped diffuser performance. But, the diffuser performance decreases, when the turning angle is larger than 60° and the flow path changes far than the symmetric path (45°/45°).
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
309
325
https://erjm.journals.ekb.eg/article_66853_80687d7e18e016cfea29b779f51815bc.pdf
dx.doi.org/10.21608/erjm.2015.66853
ACOUSTIC DETECTION OF CAVITATIONINCEPTION
M.A
Hosien
Mechanical Power Engineering Department, Faculty of Engineering,
Menoufyia University, Shebin El-Kom Egypt
author
S.M
Selim
Mechanical Power Engineering Department, Faculty of Engineering,
Menoufyia University, Shebin El-Kom Egypt
author
text
article
2015
eng
An experimental study has been carried out in order to investigate the noise radiated by various cavitating sources to determine the validity of noise measurements for detecting the onset of cavitation. Measurements have been made measuring the noise radiated by a number of configurations in a water tunnel at various operating condition to determine the onset of cavitation. The measurements have been conducted over a frequency range of 31.5 Hz to 31.5 kHz in onethird octave bands. The onset of cavitation was measured visually through a Perspex side of the working section of the water tunnel. Moreover, a theoretical estimate of the pressure radiated from the cavitation nuclei at their critical radii and frequency was presented. Tests indicated that, generally, at the point of visual inception there was a marked rise of the sound pressure level in the high-frequency noise, whilst the low-frequency noise increased as the cavitation developed. This finding was supported by the theoretical estimate of the pulsating frequency of cavitation nuclei. The results illustrated that the visual observations of inception confirm the noise measurements.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
327
338
https://erjm.journals.ekb.eg/article_66854_cb549e2f792f57cd292d1162b29d9458.pdf
dx.doi.org/10.21608/erjm.2015.66854
MECHANICAL CHARACTERISTICS OF RECYCLED ASPHALT BY SUPERPAVE TECHNIQUE, NAJRAN AREA, KSA.
M. F.
El-Baz
Public Works Engineering Dept, Mansoura University, Mansoura.
author
A.K
Abd El Aal
Geology Dept., Faculty of Science, Al-Azhar University (Assuit Branch).
author
text
article
2015
eng
The physical and mechanical properties of RAP depend on the properties of aggregate, asphalt binder, pavement type, amount of time of the original pavement in service, method of recover in Existing flexible pavements represent available supplies of aggregates that can be recycled. This can significantly contribute to environmental preservation by reducing the amount of new materials required for highway construction and avoiding the problems associated with disposal of the old pavement materials. Recycling also reduces the amount of energy needed to produce the new construction materials and transport those materials to the roadway construction site. Recycling has been defined as “the reuse, usually after some processing, of a material that has already served its first-intended purpose”. The recycling procedures in pavement construction have many economical advantages over the traditional procedures. This paper evaluated the performance Superpave mix designs containing recycled asphalt pavement (RAP). The RAP used in each mix design contained aggregate from the same source as the virgin aggregate. The 3-Tier concept was used to incorporate RAP into the mixtures in the first (less than 15%),15: 25 % and third (greater than 25%) tiers. Each mix was also made by modifying the respective binder with rubber. In general, the mixtures containing RAP improved the rutting resistance and either increased, or had no significant effect on the indirect tensile strength (ITS). The tensile strength ratio (ITS) was not affected by the addition of RAP.The recycled asphalt mixture samples were tested in the laboratory. The results indicated that asphalt in the old mixtures used for recycling have low penetration and high softening point. It has also been indicated that asphalts in the recycled mixtures made by the Rejuvenating method have not been rejuvenated completely. The results also showed that Fatigue life of the recycled mixtures is longer than that of the conventional mixture. Other characteristics have been identified such as water-resistance, which showed that the recycled asphalt has high water-resistance.
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
339
348
https://erjm.journals.ekb.eg/article_66856_6b6a721eff0a5d44a5cae93339662bff.pdf
dx.doi.org/10.21608/erjm.2015.66856
التصميم والمرسم وعالقتهما بمنهج التعليم المعماري في قسم العمارة بجامعة إب
عارف عبد الله
الصباحي
قسم العمارة - جامعة إب
author
text
article
2015
eng
تتمحور مهمة التعليم المعماري في تعليم طالب العمارة فلسفات عامة تمکنهم من بلورة األفکار التصميمية المناسبة لروح عصرهم وتطوير مهاراتهم وأساليبهم التصميمية وقدراتهم التحليلية والنقدية للعمارة واالختصاصات المتعلقة بمجال عملهم. فالتصميم المعماري يمثل محور العملية التعليمية, والمرسم جوهر الفعالية التصميمية, وهو المکان المالئم لتلقي المعرفة والتعليم واإلبداع المعماري والهندسي. وبمرور أکثر من خمسةوتخرج الدفعةعشر عاما الثانية عشر من قسم العمارة بکلية الهندسة بجامعة إب, برزت الحاجة الملحة لتحليل وتقييم طريقة تعليم التصميم ًالمعماري وعالقته بالمواد األخرى ودور المرسم, حيث لوحظ تراجع في کفاءة تعليم الفعالية التصميمية في المرسم لظهور بعض المستجدات: عن ًفضالکسياسة القبول المرتفعة مع قلة الفراغات ونقص الکادر التدريسي, والخلط بين الطريقة التقليدية وغير تقليدية في تدريس التصميم,استخدام الطالب المتزايد وغير المقنن للحوسبة وشبکات المعلوماتية والتواصل االجتماعي. تهدف الدراسة إلى تحليل وتقييم دور المرسم في تعليم المهارات التصميمية واإلبداعية ضمن منهج قسم العمارة بجامعة إب. وتفترض الدراسة التراجع المطرد بمستوى المهارات التصميمية والفنية لخريجي القسم. ولتحقيق الهدف يتناول البحث نبذة عن التصميم وعالقته بالتعليم المعماري وخصوصيته. ومن ثم دراسة بعض المدارس الفکرية المتبعة في هذا التعليم. وبعد ذلک تحليل وتقييم منهج التعليم المعماري في قسم العمارة بجامعة .بعض االستنتاجات والتوصيات
ERJ. Engineering Research Journal
Menoufia University, Faculty of Engineering
1110-1180
38
v.
4
no.
2015
349
363
https://erjm.journals.ekb.eg/article_66857_c69e89701e6012b54c321e61c3b4ff5b.pdf
dx.doi.org/10.21608/erjm.2015.66857