The Use of Sustainable Materials in the Rurban Communities in Egypt.
Rola
Ali
M.Sc. Candidate, Programme of Environmental Engineering, Management and Technology, Faculty of Engineering, Mansoura University
author
Mohamed
Mousa
Professor, Mechanical power engineering Department, Faculty of Engineering, Mansoura University
author
Sherif
Sheta
an Associate Professor and Vice Dean for Student Affairs in Faculty of Fine Arts, Mansoura University
author
text
article
2020
eng
The use of traditional materials in rural Egypt was not as more of a behavior or style among villagers. The design and construction of rural buildings in these traditions was continuous throughout the twentieth century. However; when the rurality is beginning to mix with urbanism, it led to a variable degree of transformation and often clash. This transform does not necessarily mean being vital and the change is not always for the better as Hassan Fathy said. In this context; this paper aims to compare operating practices between traditional and modern building materials. It aims to establish a scientific debate on the subjects related to usage of such materials so as to recognize the potential of modernization patterns for sustainable building construction. To take advantage of using these criteria, the conclusion determines an evaluation that set elementary criteria of building material selection in order to attain better sustainability standards for the rurban communities in Egypt.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
1
7
https://bfemu.journals.ekb.eg/article_115389_2e32d02cc17fec7716bad690fd2c33fc.pdf
dx.doi.org/10.21608/bfemu.2020.115389
The Role of Building Technology in Reaching Architectural Design Compatible with the Local Environment.
Mai
Anan
A lecturer at the department of Architecture - college of Engineering - delta High Institute for Engineering and Technology
author
Lobna
Agha
Assistant professor of Architecture at the Department of Architectural Engineering, Tanta University, Tanta, Egypt
author
Ayman
Ahmed
Associate professor at the Department of Architectural Engineering, Tanta University, Tanta, Egypt
author
text
article
2020
eng
Building technology is one of the important factors that affect the environment and nature as it attempts to find special determinants with making a framework of the environment surrounding the human being, which defines, establishes and evaluates the relationship between architecture and the natural environment and the human being. evaluates the relationship between architecture and the natural environment and man. An interaction between man and the natural environment through building technologies is one of the most important elements of human civilization. Emphasis is on the importance of preserving the environment and the life of human societies on earth by using means of addressing negative phenomena and how to develop them. The problem of research lies in the fact that most Arab regions have a desert dry climate where life requires suitable properties and qualities. Therefore, several public and private authorities interested in the sector and affairs of building and development in the Arabian areas adopt the urban characteristics and including them in the terms and conditions for desert projects. The main purpose of research is to examine different building materials compatible with the environment and the interaction among these materials in an integrated manner
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
8
16
https://bfemu.journals.ekb.eg/article_116430_bb8f0cdd479c534b5f3b65c6aeda3a5d.pdf
dx.doi.org/10.21608/bfemu.2020.116430
Comparison between Two Hydraulic Control Valves Systems for Leakage Minimization in Water Distribution Networks Using Multi-Objective Memetic Algorithm.
Hamdy
El-Ghandour
Irrigation & Hydraulics Dept., Fac. of Engrg., Mansoura Univ., Mansoura , Egypt.
author
text
article
2020
eng
This paper optimizes the selection, number, location, and sizing of hydraulic devices with the purposes of leakage reduction in water distribution network (WDN). A multi-objective memetic algorithm is adopted to effectively minimize the leakage problem in WDN through the regulation of two different hydraulic control valves systems: throttle control valves (TCVs) and flow control valves (FCVs). Two objective functions are simultaneously considered: the first one is to minimize the total leakage in the network and the second objective function is represented by the minimization of the number of valves (a surrogate for establishing valves cost) while accomplishing the required nodal pressure head restrictions. The great advantage of this study is that, in one run, several trade-off optimal solutions are acquired with a different level of compromise between the two objectives. Each solution from these optimal ones consists of minimum number of suggested valves, the best locations for the valves and optimum valves settings. The performance of the developed optimization model is evaluated by its application on a well-known WDN from literature. Then, the developed optimization model is applied on a real WDN of a new city, Egypt. Results show that the hydraulic performances of the two hydraulic control valves systems in leakage reduction are almost agreement for the same valves number, and the TCVs system is relatively better than the FCVs system
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
1
10
https://bfemu.journals.ekb.eg/article_106140_7ce6fa77a664f9656ff83b9ab560bea0.pdf
dx.doi.org/10.21608/bfemu.2020.106140
Prediction of Shoreline Deformation around Multiple Hard Coastal Protection Systems.
Tharwat
Sarhan
Faculty of Engineering , Mansoura University
author
Nada
Mansour
Faculty of Engineering , Mansoura University
author
Mahmoud
El-Gamal
Faculty of Engineering , Mansoura University
author
text
article
2020
eng
There are several methods to represent the beach changes around the composite coastal protection systems at the coastal zone. This research try to investigate and predict shoreline changes around composite shore protection systems using LITPACK software. The model represents the movement of sandy soil sediment transport under the effect of wave and current interaction. The morphological changes development along quasi-uniform beaches are investigated. The model was applied on the natural bathymetry of area which located in the neighboring of El-Hammra port at the north western coast of Egypt. The numerical model was applied to clarify the predicted rates of erosion and accretion around the existing structures and the proposed additional protection structures. The model results were calibrated with the measured shoreline from 2015 to 2017 and verified with shoreline data from 2017 to 2019. The model was performed to predict the morphological changes from 2015 to 2030. Validation applied on the simulated and measured 2019 shoreline by calculating RMSPE value to evaluate the accuracy of the predicted shoreline. Finally, a hard coastal protection system has been proposed, consisting of detached breakwaters and two long groins. Results derived from the model show the reliability and suitability of the model to be applied as a correlated protecting systems for the similar regions.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
11
21
https://bfemu.journals.ekb.eg/article_107454_0af8f85f92449c96ff08abc8161d7ebd.pdf
dx.doi.org/10.21608/bfemu.2020.107454
Improvement of Drinking Water Properties Using a Novel Biosorbent Material.
Mohamed
Hussen
M.Sc. Student, Public Works Department, Faculty of Engineering, Mansoura University
author
Mohamed
Gar Alalam
Lecturer, Public Works Dept., Faculty of Engineering, Mansoura University, Egypt
author
Hisham
El-Etriby
Professor of Public Works, Faculty of engineering, Mansoura University, Egypt
author
text
article
2020
eng
In the present study, a new material has been discovered in the world of natural coagulants and adsorbents to improve drinking water properties. Flaxseed husk was used as a natural coagulant and adsorbent to remove turbidity, natural organic matter and iron from underground water for several wells in Al-Jouf region in the north of the Kingdom of Saudi Arabia. To remove turbidity and natural organic matter, modified flaxseed husk (MFH) was prepared by addition of aluminum sulfate (AS) to flaxseed husk (FH) after removing mucilage and oil. The characterization of FH shows high specific surface area (125.18 m2/g) with average pore diameter of 26.28 μm. Moreover, FTIR spectra analysis indicated existence of large number of amino groups and another functional group indicated that FH efficiency about removal of turbidity and natural organic matter. The optimum ratio MFH:AS for removal was (80%:40%). Batch experiments were performed as function of process parameters such as slow mixing time, FH dosage and Initial NOM. The removal of turbidity and natural organic matter (NOM) by modified flaxseed husk (MFH) were investigated using a FH dosage of 40 mg.l-1 and 10 mg.l-1 AS which attained a removal efficiency of 98.0 % for turbidity and 99.3 % for NOM at the highest NOM concentration. Also, reduce the iron concentration in drinking water by flaxseed husk ash (FHA) which prepared by burning flaxseed husk at certain temperature was investigated. Batch experiments were performed as function of process parameters such as FHA type, contact time (CT), FHA dosage and initial Fe concentration. The FHA showed a high removal of Fe3+ from aqueous solution. The maximum Fe removal was 90% at FHA200, FHA dose 0.75 g/l and contact time 45 min, The pH value from 7 to 7.8 and the temperature value from 20 to 24 0C. The adsorption equilibrium has been studied by the pseudo first order kinetics model, the pseudo second order kinetics model, Langmuir and Freundlich isotherm, all these models demonstrated the adsorption efficiency of the adsorbent surface behaved in a favorable manner for Fe adsorption
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
21
32
https://bfemu.journals.ekb.eg/article_114832_965f78dbd4b2e98815d54ac13f93bf2f.pdf
dx.doi.org/10.21608/bfemu.2020.114832
Impact of Energy Storage Devices on the Distribution System Stability with Distributed Generation.
Mohamed
Talal
a researcher at Mansoura university, faculty of Engineering, Electrical Engineering Department
author
Sahar
Kaddah
Prof, Electrical Engineering Department, Faculty of Engineering Mansoura University, Egypt, She is the head of Electrical Engineering Department
author
Abdelfattah
Eladl
Electrical Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt
author
text
article
2020
eng
Renewable energy sources have environmental and economic advantages, but it causes many fluctuations and severe problems on the power system. One solution to decrease these problems are designing renewable sources as distributed generations (DGs) on the power distribution system. But it is necessary to add energy storage systems (ESS) to the power system to improve the impact of DGs on the power system stability. In this paper, the photovoltaic system (PV) with energy storage devices such as battery or superconducting magnetic energy storage systems (SMES) is added to the power system and analyzed the stability of the system by using the software program, “MATLAB/Simulink®”. The transient stability of the power system is studied based on many factors as maximum rotor speed deviation, the drop-in grid voltage, and the drop in DC voltage of the PV. A different abnormal system states are simulated to show the effect of system configuration on its stability. For validation, a comparative study is implemented. From the results, it is found that the stability of the power system is improved through the adding of the PV system and increased by adding energy storage systems.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
1
10
https://bfemu.journals.ekb.eg/article_103619_46499dfa313e60166aa130d82df44408.pdf
dx.doi.org/10.21608/bfemu.2020.103619
Accurate Diagnosis of COVID-19 Based on Deep Neural Networks and Chest X-Ray Images.
Hossam El-Din
Moustafa
Mansoura University
Faculty of Engineering
Electronics and Communications Department
author
Mervat
El-Seddek
Department of Electronics and Communications - Misr Higher Institute for Engineering and Technology - Mansoura
author
text
article
2020
eng
The present study aims at preventing spread out of COVID-19 by early detection of infected cases using chest X-ray images and convolutional neural networks. Covid-19 chest X-ray dataset were collected from public sources as well as through agreements with hospitals and physicians with the consent of their patients. A deep learning algorithm based on convolutional neural networks (CNN) was implemented utilizing X-ray images to diagnose COVID-19. ResNet50, short for Residual Networks, is a classic neural network that was used as a backbone for the classification task. It accelerates the speed of training of the deep networks and reduces the effect of vanishing gradient problems. Images were first resized and then pre-processed to increase sharpness, contrast, and clarity. Images were fed into a deep neural network to predict the probability of COVID-19 infectious. The deep learning calculation acquired an area under the curve (AUC) of the receiver operating characteristics (ROC) of 0.9888, 96.2% sensitivity, 98% accuracy, and 100% specificity. Moreover, the algorithm can be easily modified to add extra images (normal and COVID-19) to improve performance. The proposed system introduces a great help to all nations to screen and diagnose COVID-19 as a faster alternative compared with conventional method that uses PCR
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
11
15
https://bfemu.journals.ekb.eg/article_104387_875e48922bf07e39ce43361aa0ae6a2d.pdf
dx.doi.org/10.21608/bfemu.2020.104387
Cuckoo Search Algorithm for Extraction Ten Parameters of Photovoltaic Models.
Mokhtar
Ahmed
electrical engineering - faculty of engineering - fayoum university
author
Ahmed
Osama
electrical engineering - faculty of engineering - fayoum
author
text
article
2020
eng
the important issue in the extraction of the unknown parameters in the photovoltaic model is the mathematical models. Therefore, a five equivalent circuit is analyzed in this work. The unknown parameters are five for single diode model, seven for double-diode model, eight for modified double-diode, and nine for three-diode model and ten for modified three-diode parameters. The performance of the modified three-diode model and three-diode model after estimate all parameters without assumption for any variable are compared with the performance of the both single diode model, double-diode model and also the modified double-diode of the same solar cell. Cuckoo search optimization algorithm (CSOA) is proposed for the estimation of the unknown parameters for the five solar cell equivalent models. The root mean square error, the absolute error for current and power, and the maximum power point absolute error are analyzed to the performance of the five solar cell models.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
16
26
https://bfemu.journals.ekb.eg/article_108431_d20c7026579e412f0abbda554176f95e.pdf
dx.doi.org/10.21608/bfemu.2020.108431
Integrating Dynamic Line Rating in Security Constrained Optimal Power Flow Considering Wind Power Generation.
Ahmed
Hamed
Nile Academy, Faculty of Engineering, Electronics and Communication Engineering Dept., Mansoura, Egypt
author
Sobhy
Abdelkader
Electrical Power Engineering Dept., Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab, Egypt and Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt
author
Abdelfattah
Eladl
Electrical Engineering Dept., Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt
author
text
article
2020
eng
Traditional optimal power flow (OPF) problem is solved considering static line rating (SLR) of the transmission lines which are constant values of power flow limits. This led to underutilization of the network and higher locational marginal prices (LMPs). Dynamic line rating (DLR) is one of the active solutions to enhance ampacity for overhead transmission lines (OHTL), especially with the penetration of high wind power without investing in an additional transmission line network. This paper investigates the effect of integrating the DLR on power dispatch with uncertainty levels due to renewable energy sources (RES) generation. The model propose is a multi-period security-constrained OPF based on particle swarm optimization (SCOPF/PSO) that takes into consideration the steady-state heat-balance equation (SS-HBE) of the OHTL and the ramp-up time of generation units. The problem is a multi-objective optimization one; the main objective is to maximize the social welfare (SW) by minimizing total system operation cost and maximizing the revenue from the energy consumers, whereas the second objective is to minimize the thermal emissions. To demonstrate the effectiveness of the proposed model, a case study is applied to the modified IEEE 30-bus test system. The results expound on the effectiveness of the proposed approach.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
27
36
https://bfemu.journals.ekb.eg/article_110993_0c677d90c629d131c8e0de67b627da77.pdf
dx.doi.org/10.21608/bfemu.2020.110993
Mitigation of Transient Recovery Voltages using the Supercapacitor.
Eman
Awad
Quarter 4, 2 neighbors, Building 12/47
author
Ebrahim
Badran
Mansoura university,
Faculty of Engineering,
Electrical Engineering Department.
author
text
article
2020
eng
This paper investigates the use of supercapacitor to mitigate the transient recovery voltage (TRV) in a simple power system. The TRV concept and the phenomena surround its occurrence such as re-ignition and restrike are represented. Also, the different waveshapes of TRV are evaluated. The effect of energizing different power system parameters, such as resistance and capacitance, resulting in TRV is evaluated. At first, the effect of energizing three different values of a damping resistance, one by one, is studied. Then, the influences of energizing of a capacitor, with three different values, on the tested system are illustrated. Finally, the effect of combining different values of the damping resistance and the capacitance are evaluated. The effect of using supercapacitor as TRV mitigation method is studied. Alternating transient program (ATP/EMTP) is used to simulate the test system and the proposed supercapacitor-based method. The simulation results ensure the validity of the proposed method.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
37
42
https://bfemu.journals.ekb.eg/article_123536_738a60d6b126596dd89bc25e43c3a57d.pdf
dx.doi.org/10.21608/bfemu.2020.123536
Interaction of Spinning Parameters in Rieter Air-Jet Fabric Properties.
Moaaz
Eldeeb
Textile Engineering Department, Faculty of Engineering, Mansoura University, Egypt
author
Abd El Monem
Fouda
Textile Engineering Department, Faculty of Engineering, Mansoura University, Egypt
author
text
article
2020
eng
The newest method of air-jet spinning is launched by Rieter. This article examines the interaction effect of various spinning process parameters such as delivery speed, yarn linear density and nozzle pressures on single Jersey knitted fabric properties. Results show that yarn linear density has the maximum effect on fabric bursting strength and abrasion resistance followed by delivery speed and nozzle pressure. Generally, fabrics made using fine counts are weak, low abrasion-resistant and their surface are smooth. Using high yarn delivery speed affected fabric bursting strength and abrasion resistance negatively. Moreover, by increasing nozzle pressure, the fabric abrasion resistance improves to a specific level then it deteriorates when nozzle pressure approaches 6 bar.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
1
5
https://bfemu.journals.ekb.eg/article_106407_9660e65e9387edc977f08a847cd946af.pdf
dx.doi.org/10.21608/bfemu.2020.106407
Online Quality Control System in Single Jersey Circular Knitting Machine.
Abd Elmonem
Fouda
Textile Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt
author
text
article
2020
eng
With the great development in the technology of manufacturing knitting machines, and high productivity. There are still some drawbacks that might be overcome by applying novel measurement methods, particularly, in the circular single Jersey knitting machines. The most important of these drawbacks is the laddering defects. In this paper, an online quality control system - the first of its kind - was developed and assembled on the machine and consists of a transmission unit (laser) and a receiving unit (photocell), to detect laddering defects in real-time. Once occurred, the system beeps to draw the attention of the operator and the machine stops automatically, the machine then runs again after the defect is being fixed. Thus, this system can reduce the production of the second degree, raise the level of quality, and reduce the production costs per kilograms of the produced fabric. This system proved its sensitivity and efficiency while the machine runs at the typical production speeds
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
6
10
https://bfemu.journals.ekb.eg/article_110853_a33d628094feac8e67c5216e580a1f5a.pdf
dx.doi.org/10.21608/bfemu.2020.110853
Experimental Study of Jet Impinging Double-Pass Solar Air Heater Using Wire-Mesh.
Moner
Atiya
Researcher at Mechanical Engineering Department, Mansoura University, Mansoura 35516
author
Gamal
Sultan
a Professor at the Department of Mechanical Power Engineering, Mansoura University, Mansoura, Egypt
author
Ahmed
Hegazi
Mechanical Engineering Department, University of Mansoura, CO 35516, Egypt
author
text
article
2020
eng
This paper manages the test examination of the Solar Air Heater (SAH)exit temperature and efficiency. The trial test segment is planned and manufactured to study the jet impingement effect on the absorber plate with wire mesh, among circular jets in a channel of SAH, and compared with traditional SAH with the jet plate. The proposed solar air heater is tested by varying the nozzle diameter to have the values 3 mm, 5 mm,7 mm and 9 mm while the mass flow rate of air range is 0.0147–0.0201 kg/s. The research declared that the maximum thermal efficiency is gained at 3 mm hole ID. The maximum thermal efficiency is 72.33%with wire mesh and 61.89% without wire mesh at the mass flow rate is 0.0201 kg/s. The lowest performance is recorded at the 9 mm diameter hole. The best percentage increase in efficiency of the IJDPSAH with metal wire mesh occurs at 5 mm is 29.48%.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
1
8
https://bfemu.journals.ekb.eg/article_121199_780b1282d186fdf5bec47aa92d029ef4.pdf
dx.doi.org/10.21608/bfemu.2020.121199
Semi-Analytic Modeling of Laminar Forced Convection in a Rectangular Duct for Arbitrary Boundary Conditions and Inlet Temperature Profile.
Rawan
Mokhtar
Reasearcher at Mechanical Power Engineering Dpt., Mansoura University,Mansoura
author
Mohamed
Tawfik
Lecturer at Mechanical Power Engineering Dpt.,Mansoura University, Mansoura, Egypt
author
Mohamed
Sabry
Mechanical Power Engineering Department, Faculty of Engineering,
Mansoura University, El-Mansoura 35516, Egypt
author
text
article
2020
eng
Modeling the forced convection heat transfer with arbitrary boundary conditions and inlet temperature profile was studied in order to go beyond the classic, but unrealistic cases of imposed uniform heat flux or wall temperature as well as a flat temperature at the inlet. The proposed approach, known as the Flexible Profile Compact Thermal Model (FP-CTM), which has been proposed earlier to treat circular cross-section ducts, is generalized here to treat ducts with a rectangular cross-section. It is applied to the laminar hydrodynamically fully developed flow but thermally developing. It offers significant advantages over the traditional model of convective heat transfer coefficient (HTC), for which correlations only exist for uniform boundary conditions and inlet profile. The proposed approach makes it more efficient when dealing with problems with non-uniform conditions such as conjugate heat transfer problems. A critical advantage of this approach is that it uses a semi-analytic treatment to produce highly accurate results that are comparable to those produced by commercial CFD tools but with significantly less CPU time. Results obtained from the proposed approach, i.e. FP-CTM were compared with that obtained from Ansys Fluent. The comparison has shown that FP-CTM is very reliable. The maximum error compared with Fluent solver results was 0.01 °C for a temperature range between the inlet and outlet of about 50 °C. Based on the preceding comparison, the FP approach was used to solve different problems with different boundary conditions (uniform and linear heating) and inlet profiles (flat and non-flat inlet) using significantly fewer computing resources.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
9
18
https://bfemu.journals.ekb.eg/article_109303_30e5d3a1db1b7af4b277d7e86c819a30.pdf
dx.doi.org/10.21608/bfemu.2020.109303
Investigation of Paraffin Wax with ZnO Nanorods for Performance Enhancement of Solar Thermal Energy Storage.
Mohamed
Sokar
Mechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt.
author
Shehab
Mansour
Basic Engineering Science Department, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt
author
Ali
Ali
Mechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt
author
Malek
Elnekiety
Mechanical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt
author
text
article
2020
eng
This paper discusses the influence of paraffin wax inoculated with ZnO-nanorods on the latent heat of thermal energy storage (LHTES) of solar water heating system. The main objective of the experimental study is to determine the percentage increase in thermal storage capacity of using paraffin wax with 0.15 wt.% ZnO-nanorods as nano-composite phase change material (NCPCM) to the raw paraffin wax as base phase change material (PCM). The experiments were performed by 33-liter insulated stainless-steel storage shell TES tank containing 21 copper tubes 5/8-inch in diameter. The TES tank is filled with circulating water and the tubes are filled with either the pure PCM or NCPCM. The water is the heat transfer fluid (HTF) in the TES tank. The experiments were done at different HTF flow rates to study the best flow rate that increases both the amount of heat transfer and melting rate of PCM. It was found that 0.15 wt.% ZnO NCPCM decreases the charging and discharging time compared to the pure PCM, and a percentage increase is achieved in thermal energy storage by 20% when using 0.15 wt.% ZnO nanorods. The results also reveal that the maximum discharge energy was raised from 266 kW for pure paraffin wax to 306 kJ for 0.15 wt.% ZnO NCPCM. The NCPCM at 6 l/min HTF flow rate provides the highest energy recovery ratio (ERR), while the smallest occurs at 9 l/min.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
19
28
https://bfemu.journals.ekb.eg/article_111571_6e24e54561d48a5e90b8e36211747d1d.pdf
dx.doi.org/10.21608/bfemu.2020.111571
Performance of an Orifice Meter Handling Two-Phase (Gas-Liquid) Flow.
Ali
Zahran
Volume and Fluid Flow Metrology Laboratory, National Institute of Standards, Egypt
author
Lotfy
Hassan Rabie Sakr
Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University
author
Ibrahim
Shabaka
Aeronautical and Aerospace Engineering Department, Faculty of Engineering, Cairo University, Cairo, Egypt
author
Mohamed
Mansour
Mechanical Engineering Department, Faculty of Engineering, Mansoura University, AlMansoura, Egypt
author
text
article
2020
eng
— The two-phase flow rate measurements remain a challenging task due its complexity. There are many factors that affect on the measurement process such as the properties of the two phases and the dryness fraction. In the current study, the two-phase flow through three orifice plates with different beta ratios (orifice diameter to pipe inner diameter ratio) of 0.7, 0.63, and 0.5 installed in a horizontal acrylic pipe with an inside diameter of 60 mm has been experimentally investigated to improve the accuracy of the two-phase mass flow rate measurements. The inlet superficial velocities of liquid and gas phases are rated from 0.8 to 2.4 m/s and from 0.0 to 0.79 m/s, respectively. Also, the average gas volume fraction is rated from 0.0 to 61%. The pressure drop through the three orifice plate was measured and the flow patterns were tackled before and after the orifice plate. The effect of the two-phase flow on the orifice correction factor is studied at different liquid and gas mass flow rate values for the three orifice plates with different beta ratios. Also, a new correlation was introduced for the two-phase correction factor through the three orifice plates.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
29
38
https://bfemu.journals.ekb.eg/article_114002_05bdcd3d1f2cb0861ed50fe3ff0d52dd.pdf
dx.doi.org/10.21608/bfemu.2020.114002
Dynamic Performance Enhancement of Vertical Wind Turbine Using Composite Blades Reinforced by Zinc-Oxide Nanoparticles.
Khaled
Khader
Production Engineering and Mechanical Design Department
Faculty of Engineering, Menofia University
author
Shehab
Mansour
Basic Engineering Science Department, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt
author
Ibrahim
El Fahham
Mechanical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt
author
Mamdoh
Elimy
in Production Engineering and Mechanical Design Department, Faculty of Engineering, Menoufia University, Shebin El-kom, Menoufia, Egypt
author
text
article
2020
eng
The Performance of Vertical Axis Wind Turbine (VAWT) is highly dependent on its blades strength and stability. This paper is mainly dealing with enhancing the blades' structure of Vertical Axis Wind Turbine which is suitable for countries that have a moderate wind speed. The suggested improvement entails employing reinforced light composite blades using Zinc-Oxide (ZnO) nanoparticles (NPs) synthesized by the polymer-pyrolysis route. To assess the performance of the proposed design, a multistage Savonius blades prototype is built to realize the essential ultrasonic and vibration tests. Five different composite blades with different ZnO volume percentages are tested for assessing their values of the attenuation coefficient and the phase velocity and evaluating the composite material robustness. A wind tunnel is also used to evaluate the prototype power coefficient. Besides, the effect of the shift-angles between the different blades' stages on the turbine efficiency has been evaluated. The theoretical analysis and experimental results of the natural frequencies ensured that the proposed model can avoid the resonance scenarios through working at considerably high rotating speeds.
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
39
49
https://bfemu.journals.ekb.eg/article_114325_58b3faaf9911eb1652b99e0a58dfa2fa.pdf
dx.doi.org/10.21608/bfemu.2020.114325
A New Fuzzy Logic Approach for Prediction of Surface Roughness.
Fatma
Elerian
Production engineering and Mechanical design department, Faculty of engineering, Mansoura university
author
text
article
2020
eng
The quality of mechanical components depends largely on their surface roughness (Ra). The surface roughness is greatly affected by various cutting factors, the most important being feed, cutting speed and also the cutting depth. So, there are many researches dealing with this topic, some of which perform experiments on different materials to determine the value of Ra and others try to make programs to predict surface roughness to reduce time, cost and effort consumed in experiments. In this paper, a new fuzzy logic approach isintroduced to predict interstitial valuesof Ra. Data set used in fuzzy logic approach is obtained from turning of Ti-6AL-4L [14]. A Matlab toolbox is used for training of fuzzy logic approach. Predicted results using this approach show good results in comparison with experimental & theoretical onesresults using this approach show good results in comparison with experimental & theoretical ones
MEJ- Mansoura Engineering Journal
Mansoura University, Faculty of Engineering
1110-0923
45
v.
3
no.
2020
50
56
https://bfemu.journals.ekb.eg/article_118051_74ee633cf6234308b7c6b69d9409cdc5.pdf
dx.doi.org/10.21608/bfemu.2020.118051