Helwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Conventional and Advanced Glazing Technologies for Enhancing Thermal and Lighting Performance11519326010.21608/erj.2021.193260ENAyaWalid Yehia AbdelHAdy El-EshmawyDepartment of Architecture, Faculty of Engineering, Ain Shams University.AhmedAtef El Dessoqy FaggalDepartment of Architecture, Faculty of Engineering, Ain Shams University.AbeerMohamed Mustafa EissaDepartment of Architecture, Faculty of Engineering, Ain Shams University.Journal Article20210906Glass is one of the oldest man-made material that is widely used in architecture. As it is a translucent material, it permits a full penetration of direct sunlight but may also increase the internal space temperature and then increasing cooling loads and energy consumption. As the need for energy optimization is very important and glazing is considered a weak point in any building, the selection of glazing assumes tremendous significance. This paper reviews the different types of glazing which can be categorized into conventional and advanced to optimize the thermal and the lighting performance according to their properties and insulation values. Conventional glazing includes the clear glazing whether it is single double or triple, the tinted glazing, the reflective glazing, and the low-E glazing. Advanced glazing which is mainly the insulated glazing unit such as the gas filled glazing, the vacuum glazing, the aerogel glazing and the phase change material glazing.https://erj.journals.ekb.eg/article_193260_6bcba5db8388094ee140b8e3d1537e34.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901BRIEF OVERVIEW OF CLIMATE RESPONSIVE FACADES & ITS KINETIC APPLICATIONS163419346110.21608/erj.2021.193461ENAhmedAbdelwahed MekhamarAssistant lecturer,Architecture Dep., Faculty of Engineering-Mattaria, Helwan UniversityAhmedHalim HusseinLecturer
Architecture Dep., Faculty of Engineering-Mattaria, Helwan UniversityJournal Article20210907Facade systems have recently been transformed from simple passive elements to
more advanced and complex active systems that are able to act in an adaptive manner
and in response to the surrounding environment through changing buildings facades
behaviour, in terms of spatial configurations or characteristics of its external skin.
R
<span style="font-family: Times New Roman;">esponsive facades can improve building’s energy efficiency through improving</span>
buildings energy savings by their capability to change their behaviour and/or
characteristics through exploiting stimulus-responsive materials and intelligent
control systems that can make a significant and valuable contribution to the success of
the buildings system as a whole.
This paper intends to display a brief overview of the existing different climate
responsive facades strategies through displaying a number of different environmental
responsive facades behaviours as well as goals that can be achieved by the
applications of such responsive facades. Based on the analysis of the illustrated case
studies considered in this paper, responsive behaviour of kinetic facades is
categorized under two main categories in response to two main types of stimuli that
usually buildings are subjected to which are solar radiation
<span style="font-family: Calibri; font-size: medium;"><span style="font-family: Calibri; font-size: medium;">and </span></span><span style="font-family: Times New Roman;">natural air current.</span>
Each one of these types is categorized into other sub categories which vary according
to a number of different factors such as the design strategy, desired function or
applied technology. the applications of kinetic solar responsive facades in this
research is divided into three main types, which are responding through architectonic
building movement, transformable shading systems and integrated kinetic shading
systems with PV cells. While natural air current and wind driven kinetic responsive
facades are divided in to two main types, which are air current responsive facades and
integrated air current responsive facades with wind energy collectors.
Adaptive architecture generally and responsive facades strategies specifically with
its wide range of applications is considered as an emergent and significant research
topic, based on its capability of reducing buildings energy consumption rates
drastically as well as improving the indoor living environments.https://erj.journals.ekb.eg/article_193461_c5176f2d15d4146c2aaba4435aa82ae9.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901The Use of Green Design Strategies for Achieving Thermal Comfort (Applying PMV as a Measurement Tool)354619347110.21608/erj.2021.193471ENDoniaAyman El.DeebArchitectural Engineering and Environmental Design Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Alexandria, EgyptAlaaElDinNagy SarhanArchitectural Engineering and Environmental Design Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Alexandria, Egypt.YasmineSobhy KandileArchitectural Engineering and Environmental Design Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Alexandria, EgyptJournal Article20210907Improving outdoor thermal comfort is a key parameter in achieving the vitality and functionality of urban spaces. In order to build a thermally comfortable outdoor space, designers must consider suistainable urban, architectural, and landscape design solutions. The main problem is that most of recent developments in Egypt didn’t consider the use of green design strategies which resulted in human outdoor thermal discomfort. In this research, a case study in Egypt, characterised by hot arid climate is used to discuss and quantify the impact of green design strategies on urban microclimate and human sense of thermal comfort. The methodology used is based on Envi-met simulation to measure the four climatic parameters and PMV index. The outcomes indicated that significant enhancement in thermal comfort was achieved with the trees coverage, Where Using the maximum tree coverage showed the best improvement in PMV values with a drop of 2.48 at peak hours when compared to the base case. The results showed that the use of trees is an important strategy to improve the micro-climatic conditions and human thermal comfort in open spaces due to the shading effect as they block out excessive solar radiation.https://erj.journals.ekb.eg/article_193471_1b16f6129127aabd489718548c086379.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901تأثير المعلوماتية على المراکز التجارية في المدينة476519348810.21608/erj.2021.193488ENأحمدحلمي محمد عبد اللهمدرس مساعد بکلية لبفنون الجميلة والعلوم الهندسية - جامعة مصر الدوليةغادةفاروق حسنکلية الفنون الجميلة والعلوم الهندسية - جامعة مصر الدوليهأحمدسامي عبد الرحمنکلية الفنون الجميلة والعلوم الهندسية - جامعة مصر الدوليةJournal Article20210907يعد التطور في تکنولوجيا المعلومات والاتصالات واحدة من أهم مميزات هذا العصر، حتى أطلق على هذا العصر اسم عصر المعلومات Age of Information، ساعد هذا التطور في انتاج نماذج ومصطلحات عمرانية جديدة تعتمد على المعلوماتية وتطبيقاتها في حل بعض المشاکل العمرانية وطرح أساليب لم تکن مألوفة من قبل، کذلک أثرت المعلوماتية على سلوک المستخدمين مع نشطتهم العمرانية، وأيضا کان للمعلوماتية أثرا کبيرا على التغير في سمات تلک الأنشطة، وحيث أن النشاط التجاري يعد واحد من أهم الأنشطة بالتجمعات العمرانية – إن لم يکن الأهم – ويمثل دورا محوريا في النظام اليومي للسکان فهو من أکثر الأنشطة العمرانية تأثرا بهذا التطور.
لذلک يهتم هذا البحث برصد تأثير التطور في تکنولوجيا المعلومات والاتصالات Information and Telecommunication Technologies (ICT) على العمران بشکل عام وعلى الأنشطة التجارية داخل المدن بشکل خاص من خلال دراسة المفاهيم العمرانية المستحدثة المصاحبة لهذا التطور في الاوساط الافتراضية، ودراسة المدن المعلوماتية وأبعادها للتعرف على مدي التغير في الأنشطة العمرانية وخصائصها وسماتها والتحديات التي تواجهها، وکذلک رصد هذا التأثير على مستوى المراکز التجارية تصميميا وتخطيطيا.https://erj.journals.ekb.eg/article_193488_e0144bb5b58c9882920dfa5d8144e18a.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901إعادة تهيئة الأسطح القائمة کقيمة بيئية و اقتصادية مضافة دراسة حالة: عمارات العبور- مدينة القاهرة Retrofitting existing conventional roofs as an environmental and economic added value Case study: El Obour Buildings – Cairo City668719349410.21608/erj.2021.193494ENسارةمحمود سيف النصر أحمد محي الدينمهندس حرياسرمحمد السيدأستاذ مساعد العمارة بکلية الفنون الجميلة ، جامعة حلوان.إبتساممحمد الجيزاوىمدرس بقسم العمارة بکلية الفنون الجميلة ، جامعة حلوانJournal Article20210907Cairo faces many problems such as overpopulation and environmental pollution due to the lack of green spaces in it, with the lack of empty spaces suitable for cultivation. In view of the large spread of the existing residential buildings in central Cairo, a study was conducted on the feasibility of greening the existing roofs of residential buildings with one unity to retrofit the roofs of these buildings and make use of them from an environmental, economic and architectural point of view. El Obour residential buildings were chosen as an example of a populated group of buildings under the one association of the Union of Owners in order to ease the application of roof greening to them. In case of working on existing buildings, the type used in roof greening must be studied in terms of loads and the appropriate installation method for these roofs.https://erj.journals.ekb.eg/article_193494_227668e36092c741bb58d6d1bfc31636.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901توظيف مبادئ الاستدامة في إضاءة الفراغات الخارجية. Application of sustainability principles on outdoor lighting.8810519349910.21608/erj.2021.193499ENسلمىسيد سيد درويشباحثة ماجستيردالياوجيه عبد الحليم سعيدأستاذ مساعد بقسم الهندسة المعمارية -جامعة حلوان.Journal Article20210907The artificial lighting of outdoor spaces may cause light and environmental pollution, and a negative impact on the health and comfort of humans and organisms in case of non-observance of the principles of sustainability, in addition to consuming enormous amounts of energy. Therefore, this research aims to study how to achieve sustainable outdoor lighting, by studying lighting methods and strategies that reduce lighting pollution and improve the visual environment for both humans and organisms, and relying on renewable and clean energy sources, in addition to the use of energy-saving lighting sources and lighting control methods, taking into consideration the attempt to reduce the negative environmental impacts resulting from the manufacture of some types of lamps or when disposing of them in a manner that does not negatively affect health.https://erj.journals.ekb.eg/article_193499_56ce7bf72bfe071f0614b8f0edc521d0.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Buildings Energy Prediction Using Artificial Neural Networks10611819380310.21608/erj.2021.193803ENMahmoudAbdelkader Bashery AbbassHelwan University, Department of Mechanical Power Engineering, Cairo, EgyptHatemSadekHelwan University, Department of Mechanical Power Engineering, Cairo, EgyptMohamedHamdyDepartment of Civil and Environmental Engineering, Norwegian University of Science and Technology, Trondheim,
NorwayJournal Article20210909This paper aims to prove that the artificial neural network (ANN) is a
powerful tool in prediction of buildings energy consumption, this target is achieved by
comparing the accuracy of ANN prediction with the output of simple linear regression
algorithm and previous work. First of all, the flowchart depends on four main steps: 1)
Data selection, 2) Data preparation, 3) Model training and tuning, and 4) Evaluate results.
The Commercial Buildings Energy Consumption Survey (CBECS) is selected as a data set
to apply ANN on it by choosing the most effective features that have the main influence on
the energy consumption. Data preparation process is done by replacing missing values and
outliers’ values wi
<span style="font-family: Times New Roman;">th median value of each feature. The model</span><span style="font-family: Times New Roman;">’s hyper</span><span style="font-family: Times New Roman;">-parameters are</span>
tuned by manual method depending on the author expeience of ANN algorithm and the
evaluation step done by using mean absolute error (MAE), mean square error (MSE), root
mean square error (RMSE) and r-squared value as a metric for performance. The results
showed that the proposed ANN algorithm achives high performance comparing to simple
linear regression algorithm and previous work on the same data.https://erj.journals.ekb.eg/article_193803_476751617dea1f391c0a842999b51513.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Experimental Investigation of Stability and Structure of Vertical LPG Inverse Diffusion Flames Issuing from an Elliptic Burner11913719381210.21608/erj.2021.193812ENA.A. MahgoubDepartment of Mechanical Power Engineering, Faculty of Engineering at El-Mataria, Helwan University, Massaken El-Helmia, P.O. 11718, Cairo, Egypt.A.M. HussienDepartment of Mechanical Power Engineering, Faculty of Engineering at El-Mataria, Helwan University, Massaken El-Helmia, P.O. 11718, Cairo, Egypt.K.A. EmaraDepartment of Mechanical Power Engineering, Faculty of Engineering at El-Mataria, Helwan University, Massaken El-Helmia, P.O. 11718, Cairo, Egypt.Journal Article20210909
<span style="font-size: large;">The present paper experimentally examines the influence of the progressive variations of the central air jet velocity in a concentric circular-elliptical inverse diffusion flame (IDF) on the visual and thermal structure and stability of the developed flames. All experiments are conducted at a fixed fuel flow rate (liquefied petroleum gas) throughput that emerges from the annular elliptic passage having an aspect ratio of 2:1. The visual images are aided via a digital camera and shadowgraphs, while the thermal structure (axial and radial temperature profiles) is acquired using a bare fine wire (125 μm) thermocouple; rendering radiation loss insignificant. The visual images and shadowgraphs clearly indicate the existence of four regimes: (i) an annular partially premixed region at the burner rim, (ii) an inner central premixed blue flame, (iii) an outer luminous yellowish post combustion zone and (iv) the flame tip buoyant zone. The progressive increases of the central average air velocity (</span><span style="font-family: Cambria Math,Cambria Math; font-size: large;" lang="JA"><span style="font-family: Cambria Math,Cambria Math; font-size: large;" lang="JA">𝑉̅</span></span><span style="font-family: Cambria Math,Cambria Math; font-size: xx-small;" lang="JA"><span style="font-family: Cambria Math,Cambria Math; font-size: xx-small;" lang="JA">𝑎 </span></span><span style="font-size: large;">= 7.4 m/s up to 31.3 m/s) result in shortening the visible flame length and narrowing the flame width. These are coupled with changing the flame appearance from a yellowish diffusion flame with a sooty core regime to an intense central premixed flame surrounded by a soot ring to blue flames exhibiting intense central radiation regime associated with soot oxidation. At extremely high air velocity > 21 m/s, locals flame extinction and re-ignition occurs at the boundaries of the ellipse minor axis and further increase of </span><span style="font-family: Cambria Math,Cambria Math; font-size: large;" lang="JA"><span style="font-family: Cambria Math,Cambria Math; font-size: large;" lang="JA">𝑉̅</span></span><span style="font-family: Cambria Math,Cambria Math; font-size: xx-small;" lang="JA"><span style="font-family: Cambria Math,Cambria Math; font-size: xx-small;" lang="JA">𝑎 </span></span><span style="font-size: large;">causes complete extinction of the main flame. These findings are very much supported by the mean gas temperature measurements that indicate steep temperature rise associated with the formation of a central premixed combustion within the flame core which is followed by the diffusion mode of combustion. A plateau of the axial temperature profiles is observed in the transition zone between the two regions whereby the rise in temperature due to soot oxidation is balanced by the radiation loss. </span>https://erj.journals.ekb.eg/article_193812_cf1da17f7f62440b9e3e64a9d7124611.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Rotary Machines Fault Diagnosis based on Principal Component Analysis13815019382210.21608/erj.2021.193822ENM.ElsamantyFaculty of Engineering at Shoubra, Benha University, 108 Shoubra St., Cairo, Egypt
Smart Engineering Systems Research Center (SESC), Nile University, 12588, Shaikh Zayed City, Giza, EgyptW.S. SalmanFaculty of Engineering at Shoubra, Benha University, 108 Shoubra St., Cairo, Egypt
Fayoum University, Faculty of Engineering, Mechanical Department, Fayoum, EgyptA.A. IbrahimFaculty of Engineering at Shoubra, Benha University, 108 Shoubra St., Cairo, EgyptJournal Article20210909
<span style="font-size: medium;">Rotating machines are commonly used in industrial applications. Mechanical faults such as rotor unbalance, shaft misalignment, pulley misalignment, structural looseness, and bearing faults leading to unplanned shutdown based on the severity of these faults. The condition monitoring technique based on vibration analysis has the potential to detect and diagnose a great number of early stage faults. However, some mechanical faults have correlated vibration features leading to ambiguous diagnosis to identify and distinguish these faults. In this paper, a proposed method based on the Principal Component Analysis (PCA) is presented to produce uncorrelated Principal Components (PCs) to identify the healthy and different faulty cases. A test rig was prepared to simulate a group of mechanical faults such as rotor unbalance, pulley misalignment, belt damage, combined unbalance with pulley misalignment, and combined unbalance with belt damage. The conventional vibration measurements were collected for each case and their features were extracted and used to produce the equivalent PCs. It was found that the produced uncorrelated PCs have the superior to distinguish the majority of simulated faults which have correlated vibration features as presented in the rest of paper. </span>
<span style="font-family: Times New Roman,Times; font-size: medium;"><span style="font-family: Times New Roman,Times; font-size: medium;"> </span></span>https://erj.journals.ekb.eg/article_193822_adb8a9af455226e515f9bf13a5b4c258.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901STUDYING THE CHANGE OF SOIL RESONANCE PROPERTIES DUE TO BURRIED ROOM IN THE SUBSURFACE15116519382510.21608/erj.2021.193825ENM.A. GamalAssociate Prof.: Geophysics Dept. Faculty of science, Cairo UniversityE.GhoneimAssociate Prof.: Civil Eng. dept,
Faculty of Eng., Helwan Univ.AliMekkiTeaching assistant, Faculty of Biotechnology,
October University of Modern Sciences & ArtsJournal Article20210909Still the change in soil due making new buildings is not very clear. The present study is giving
the light on change of soil due to structures and change of structures due to soil or what is
named soil-structure interaction. Rivera City is one of the newly generated cities located in
Sheikh Zayd City (Figure 1). The natural frequency of vibration of the soil of Rivera city was
determined in relatively remote area using Microtremors technique. It was found to be about
10HZ. The same method was used again for determining the natural frequency of vibration
empty room buried under the ground lever which was found to be about 5HZ. The dimension
of the buried room is 2.5m height, 4.5m length and 3m width. A dynamic analysis model for
this buried room was determined using a structural analysis software ETABS v18.1 and was
found to be about 5HZ. To study the soil structure interaction a profile was taken starting
from the soil and ending over the buried room. The spectrogram analysis method was
introduced. The spectrogram is a continuous recording to the change in frequency with time
for this profile showed that soil is carrying several frequencies in our case 5,8,12.5, 17.5 and
25 but when the buried room is initiated its resonance frequency is added to the soil.
Moreover, after the room was built the spectrogram over the room is filtering the soil
frequencies and absorb only the frequencies related to its dimensions in our case 5HZ, 10HZ,
and 17.5HZ and make it continuous and clear. The study suggests that initiation of new
constructions affect the soil and introduce new frequencies and also the new buildings make
filter to the frequencies carried by the soil and show only frequencies related to its properties.https://erj.journals.ekb.eg/article_193825_afafa17e9cefcedb7c4954a17fde216e.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Bluff Body Impact on Harvested Heat Transfer from Heated Plate16617819415910.21608/erj.2021.194159ENOsamaKhoraisaDepartment of Mechanical Power Engineering, Faculty of Engineering, Mattaria, Helwan University, P.O. Box 11718, Masaken El-Helmia, Cairo, EgyptMohamedAbdullahaDepartment of Mechanical Power Engineering, Faculty of Engineering, Mattaria, Helwan University, P.O. Box 11718, Masaken El-Helmia, Cairo, Egypt
Zohr Field, Petrobel Company, almokhaim Aldaem ,Cairo ,EgyptKareemEmaraDepartment of Mechanical Power Engineering, Faculty of Engineering, Mattaria, Helwan University, P.O. Box 11718, Masaken El-Helmia, Cairo, EgyptJournal Article20210912Thermal energy management and developing a reliable heat transfer system are a major concern for engineering societies. The present work aimed to investigate numerically (by using ANSYS Fluent 19.) heat transfer behavior of conventional used bluff bodies on hot plate. The study made accredited change in geometry (circular, square and triangular bluff bodies). The study covered Reynolds number range (2600<Re<9000) based on the plate characteristic length, and various separation distance between the hot plate and bluff body. The Nusselt number is taken as an indicator of heat transfer interaction due to the previous parameter change. While best temperature performance was achieved for circular, square and triangular bluffs at second hot plate location (P<sub>2</sub>) was T= 326K and T=329K respectively Finally, Nusselt number enhancement achieved by this technique according to the base case (without bluff body) was 178%, 175% and 165.2% for triangular, square, and circular bluff body, respectively.https://erj.journals.ekb.eg/article_194159_768cb1cc19c8d0024c997aed2c0314cf.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901CONSTRUCTION PROJECTS’ CLASSIFIED PERFORMANCE INDICATORS (CPIs)17919819417010.21608/erj.2021.194170ENA.S. El Touny1Ph.D. Student, Construction Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt.A.H. IbrahimProfessor, Construction Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt.H.H. MohamedProfessor, Construction Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, Egypt.Journal Article20210912
<span style="font-size: large;">Given the ongoing need for projects to achieve profitability, it is critical that they are completed on time and to the agreed-upon contractual specifications and quality. The need to identify the most important classified performance indicators (CPIs) for assessing construction projects' progress toward these objectives, as well as the satisfaction of the various stakeholders involved in the projects. As a result, the goal is to identify and prioritize CPIs that reflect Egyptian construction project performance. CPIs are identified in two stages and are divided into eight major perspectives (financial, operation, supporting, stakeholders, human capital, health, safety, and environmental, social, and innovation, learning, and growth). The first stage involved identifying (110) factors from the literature, which were then filtered and developed. The second stage involved creating a questionnaire based on the significant factors that had been identified. As a result, the (40) most important CPIs affecting the performance of the development project were identified. </span>https://erj.journals.ekb.eg/article_194170_2c1fe915c02df9acf4ede3aa250add32.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901توليد الشکل المعماري باستخدام نهج التصميم التوليدي19921319432210.21608/erj.2021.194322ENصبحيإبراهيم إسماعيلکلية الهندسة بالمطرية - جامعة حلوان - مصرمحمدعلاء مندورکلية الهندسة بالمطرية - جامعة حلوان - مصرممدوحأحمد فرجکلية الهندسة -جامعة الفيوم - مصرJournal Article20210913The use of computers is not limited to making drawings only in the architectural design process, but the designer also participates in the stages of the architectural design process itself and solving its complex design problems facing the designer by exploiting his high computational ability to produce a large number of different architectural solutions that are difficult for the architect Finding them alone in a short time, then the designer evaluates them and chooses from them, and this is what is called generative design, which is known as a collaborative process between humans and computers to solve design problems, so this research focused on applying the generative design approach to finding building mass from the layout space.https://erj.journals.ekb.eg/article_194322_170232a972098f7b6cd24e89e9b67ed7.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901دعم التوافق بين المسکن والمستخدم من خلال الفراغ متعدد الوظائف Supporting the compatibility between the residential unit and the user through the multi-functional Space concept21423919447810.21608/erj.2021.194478ENمحمدعبد المجيد ديابقسم الهندسة المعمارية
کلية هندسة المطرية جامعة حلوانJournal Article20210914Despite the efforts exerted to address the housing problem in Egypt, the problem still exists, both quantitatively and qualitatively, represented in the incompatibility of most of the presented models with the user
<span style="font-family: TimesNewRomanPSMT;">’s needs</span><span style="font-family: Times New Roman;">, especially over time. In order to deal with the qualitative part of the problem, the study tackled the possibility of achieving the housing compatibility with the user</span><span style="font-family: TimesNewRomanPSMT;">’s needs </span><span style="font-family: Times New Roman;">through the concept of multifunctional space and flexible housing.</span>
In order for the study to achieve its goals, the multifunctional space, its criteria and methods to achieve it were initially identified, followed by identifying the flexibility strategy and how to use it to achieve the multifunctional space. To learn more about how to achieve the housing compatibility with the user
<span style="font-family: TimesNewRomanPSMT;">’s needs</span><span style="font-family: Times New Roman;">, through the concept of multifunctional space and flexible housing, a model was built for evaluating the residential unit based on the actual uses of the dwellers and the standards of the building law in Egypt. Consequently, the model was applied and used to compare housing models in the case of using traditional design methods (the current design of the residential unit) and in the case of using the proposed concept, and it was also applied to one of the housing models provided by the government in Haram City. The study's conclusion confirmed the viability of the use of multifunctional space concept and flexible housing in achieving compatibility between the residential unit and the user, especially in small residential units.</span>https://erj.journals.ekb.eg/article_194478_607053501d32b7bfc3557a67365137cd.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Simulation of Performance for 140 MW Thermal Power Station at Alkuraymat Using Solar Parabolic Trough Concentrators with Thermal Storage24025919449010.21608/erj.2021.194490ENA.M. TaieaDepartment of Mechanical Power Engineering, Faculty of Engineering at El-Mataria, Helwan University,M.M. IbrahimDepartment of Mechanical Power Engineering, Faculty of Engineering at El-Mataria, Helwan University,
School of Energy, Power, and Mechanical Engineering, North China Electric Power University,M.N. MetwallyDepartment of Mechanical Power Engineering, Faculty of Engineering at El-Mataria, Helwan University,Journal Article20210914
<span style="font-size: large;">Solar power is a primary source of renewable energy and one of the most effective strategies for reducing emissions by reducing the consumption of fossil fuels. Alkuraymat power station produces about 140 MWe divided into 120 MWe produced from a combined cycle and 20 MWe from a solar field with Therminol VP-1 as a heat transfer fluid. For environmental considerations, the present work aims to evaluate the design parameters and thermal performance of the Alkuraymat power plant operated with parabolic trough solar field with thermal energy storage simulated by using System Advisor Model (SAM) software. Alkuraymat location is suitable for using a concentrated solar thermal power plant due to receiving an annual direct normal irradiance of about 2,522.15 kWh/m²/year. The results indicated that the concentrated solar thermal power plant consists of 514 solar collector loops, with each loop comprising of 4 parabolic trough collectors. As well, the proposed plant can produce annual electricity of efficiency of the power plant the 893.82 GWh andost Cevelized LRelated to the optimization of the system configuration, the is 19.4%. thermal energy storage and the full load hours of ,of energy equal to 4.79 Cents/kWhparabolic Additionally, the suggested design of thereduces from 16 to 12.5 hrs. motivates further trough concentrated power plant and the study of its performance . solar t thermal power plants in the Egyp of improvement innovation and </span>https://erj.journals.ekb.eg/article_194490_78e40a84c2c15e71bd11440f105db3b0.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901BEHAVIOUR OF PILES SUBJECTED TO LATERAL FORCES IN COHESIVE SOIL26026819478910.21608/erj.2021.194789ENA.S. MAHMOUDLecturer assistant, Civil Engineering, Helwan University, Cairo, Egypt.A.M. RADWANProfessor of Geotechnical Engineering, Helwan University, Cairo, Egypt.M.B. AnwarProf. Geotechnical Engineering,, German University in Cairo, Egypt.Journal Article20210915Although piles are elements designed primarily to support vertical loads, They are subjected to
horizontal loads by serval sources such as earthquake, wind, impact loads and lateral earth pressure. Large number
of studies have been carried out to investigate the effect of different parameters on the behavior of piles. These
parameters are summarized as i) effect of pile diameter, ii) angle of the pile with the vertical, iii) piles slenderness
ratio and soil type. In the present study an experimental program was carried out to identify the deflection of
vertical and inclined piles subjected to a lateral force in cohesive soil. The experimental program comprised pile
lateral load tests performed on model of single pile driven in cohesive soil. Using the experimental model results,
relations were utilized to estimate the lateral deflection of piles.https://erj.journals.ekb.eg/article_194789_2912bfb1b634d2e79962d6278d8c5819.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Effect of impact angle and impact velocity on the slurry erosion behavior of high density polyethylene (HDPE)26928119479110.21608/erj.2021.194791ENAhmedMostafaMechanical design department, El-Mataria faculty of engineering, Helwan University, Cairo, EgyptTarekMohamed Abd El-badiaMTC, Cairo, EgyptRaafatMahmoud Gad EL- RabEAE & AT Affiliated to ministry of military productionJournal Article20210915High density polyethylene is widely used in many applications which deal with
slurry because of its high erosion resistance characteristics. Slurry erosion is a type of erosive
wear which takes place when a stream of liquid hits a solid body and results erosion in this
body surface. Slurry erosion is affected by some parameters as material hardness, impact
velocity, impact angle, slurry content, ambient temperature, particle hardness, particle size and
particle shape. The changing of these parameters individually will result in useful analysis for
the changing in slurry erosion rate with respect to the changed parameter. This experimental
work aims to investigate the slurry erosion behavior of high density polyethylene under the
effect of different impact velocities. A slurry impingement test rig will be used to make the
wear test and wear rate of HDPE is investigated as a function of impact velocity and impact
angle. Results showed that the maximum wear rate is at the lowest impact angle and maximum
impact velocity. Weight loss is the indication of wear rate of the HDPE specimens after
experiment and wear rate is defined as weight loss during the test time in [mg/h] unithttps://erj.journals.ekb.eg/article_194791_229bc533e844d5f026c3e2fb970760ff.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901الادارة المتکيفة المشترکة کأداة لتحقيق تنمية عمرانية مستدامة و مرنة28230019479310.21608/erj.2021.194793ENعليمحمد شاکر محمدقسم الهندسة المعمارية
کلية هندسة المطرية - جامعة حلواننهىاحمد نبيلقسم الهندسة المعمارية
کلية هندسة المطرية - جامعة حلوانمحمدعبد المجيد ديابقسم الهندسة المعمارية
کلية هندسة المطرية - جامعة حلوانJournal Article20210915تواجه المدن تحديات کثيرة سکانية و بيئية واقتصادية واجتماعية ومکانية غير مسبوقة. ولطالما تواجد تحول استثنائي نحو التوسع الحضري مع توقع أن يقيم نحو 60% من السکان على مستوى العالم في مناطق حضرية بحلول 2030. سوف تقع نسبة تزيد عن 90% من هذا النمو في افريقيا، وآسيا، وامريکا اللاتينية ومنطقة البحر الکريبي. ومع غياب التعامل الفعال ستکون العواقب وخيمة. ففي الکثير من المناطق في شتى أنحاء العالم من الممکن استشعار آثار ذلک بالفعل والمتمثلة في الإفتقار إلى السکن الملائم ونمو الأحياء الفقيرة، والبنية التحتية الضعيف والمهملة – سواء کانت طُرق، أو وسائل النقل العام، أو المياه، أو الصرف الصحي أو الکهرباء – والنسب المتصاعدة للفقر والبطالة، ومشکلات السلامة والجريمة، وقضايا التلوث والصحة علاوة على الکوارث الطبيعية أو المتسبب فيها الإنسان والتي يتم إدارتها بشکل متدني وغيرها من الکوارث الأخرى الناتجة عن آثار تغير المناخ, بالاضافة الى ما اظهر النظام العالمي نحوه ضعف کبير الا و هو تفشي الاوبئة
تتمثل اشکالية البحث في القصور الشديد في ادارة التنمية العمرانية, و التي تتمثل في عدم قدرة الخطط و السياسات المتبعة من الجهات الحکومية و غير الحکومية على الصمود و التکيف مع المتغيرات السريعة و الطارئة, في ظل عدم وجود تنسيق متکامل بين جميع الجهات و الاطراف الفاعلة و اصحاب المصلحة و غياب المشارکة و التشارک الفعال, ذلک مع اغفال دور الاستدامة و المرونة کعوامل هامة و اساسية في عملية ايجاد و وضع حلول جذرية دائمة ـ تتسم بالمرونة و التکيف ـ ذات قدرة على مواکبة المتغيرات المفاجئة و الاحداث الطارئة.
يهدف البحث بشکل اساسي الى وضع اطار عمل للتعامل مع و ادارة التنمية العمرانية باستخدام ادوات الادارة المتکيفة المشترکة و ذلک لتحقيق تنمية عمرانية مستدامة و مرنة.
يتکون البحث من ثلاث محاور , المحور الاول هو التنمية المستدامة و المرنة و يتم في هذا المحور دراسة التنمية المستدامة و المرنة و معرفة متطلباتها و اهدافها و اهم معوقات تحقيقها , المحور الثاني و هو مفاهيم الادارة المتکيفة المشترکة, و المحور الثالث و هو صياغة اطار عمل الادارة المتکيفة المشترکة لتحقيق تنمية عمرانية مستدامة و مرنة.https://erj.journals.ekb.eg/article_194793_9d2b7025777e1b8baf5cadd29b6b4a73.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901The Future of Architectural Education in Egypt " Architecture Pedagogy Focuses on Educational Concepts and Approaches"30131319519410.21608/erj.2021.195194ENE.A. AboushalAssistant profesor at High Institute of Engineering and Technology (BHI ),Architectural Department,Egypt.MohamedSalah GharibAssistant profesor at High Institute of Engineering and Technology (BHI ),Architectural Department,Egypt.Journal Article20210919Architectural education in Egypt is not used the advanced methods yet e.g., digital studio, simulation
methods, and virtual reality technology. Thus, this paper proposes a new method for updating the future
education of architecture to be more qualified and smarter for architectural students such as applying virtual
reality technology (VR). Furthermore, VR depends on various tools and systems such as, Computer Aided
Virtual Environment (CAVE system) that presents the third dimension of space to be realized with all details.
The proposed method is shown to benefit the architectural students, whether at the level of study or in keeping
pace with the labor market in the future. In this track, virtual education can be applied specially in particular
theories and history of architecture. Therefore, the architectural students can improve their sense of spaces,
proportions, materials, textures, lighting, masses of buildings and all other needed functions. Moreover, VR
model of historical site is proposed in this paper as a case study by using the CAVE system to enrich the
architectural education especially in the course of architecture history and at the local level in Egypt. Therefore,
architectural students can perceive all the design principles in 3D virtual environment (VE) as the perception of
different spaces by immersing in virtual world. This saves time and effort instead of visiting the real sites under
study besides saving the cost of travel and transitions. To verify the effectiveness of the proposed solution, a
detailed case study has been applied on Elselsla area, which is located in Alexandria governorate in Egypt. This
study area ia selected to be re-designed as a renovation of historical area with competency and outperformance
according to the architectural theories and design principles.https://erj.journals.ekb.eg/article_195194_dca204f1d3da73e4c29d8ce245fb2b3e.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901نموذج مقترح لتصنيف ومعدلات الخدمات الإدارية بالمدن المصرية31432919576310.21608/erj.2021.195763ENهديلمحمود الفرنساويمدرس مساعد- قسم الهندسة المعمارية - بالمعهد العالى للهندسة والتکنولوجيا بالتجمع الخامسنهىأحمد نبيلقسم الهندسة المعمارية - کلية الهندسة بالمطرية جامعة حلوانمحمداحمد رياضقسم الهندسة المعمارية - کلية الهندسة بالمطرية جامعة حلوانJournal Article20210922Administrative services and improving their quality in cities are two of the most significant planning factors that must be considered and distributed. Where the quality of administrative services is influenced by many factors, the most significant of which is the mechanism and how the services are delivered. Therefore, the research aims to reach a proposed model for administrative service planning rates in Egyptian cities. In addition to developing a complete concept and classification of administrative services by researching administrative services in various Arab and international nations, as well as their rates in those countries. Besides identifying the hierarchy of administrative services in the city in general. The average of administrative services in different countries was concluded, given the per capita share at the district level: 0,46<span style="font-family: TimesNewRomanPSMT;">– </span><span style="font-family: Times New Roman;">0,93 m</span><span style="font-family: Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman; font-size: xx-small;">2</span></span><span style="font-family: Times New Roman;">/person, and at the city level: 1,35 </span><span style="font-family: TimesNewRomanPSMT;">– </span><span style="font-family: Times New Roman;">1,85 m</span><span style="font-family: Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman; font-size: xx-small;">2</span></span><span style="font-family: Times New Roman;">/person. By exploring the planning rates for administrative services in Egyptian capital cities and new cities, the proposed model for all administrative services that must be available in those cities to achieve self-sufficiency in service and improve the special rate for administrative services was developed. Although some Egyptian cities have reached higher rates than their worldwide equivalents, these rates have not been fully examined for the population's demands for the same service, and as a result, certain resources and services have been wasted at the loss of other services that have problems.</span>https://erj.journals.ekb.eg/article_195763_22c32ecfed2f91622672356705321515.pdfHelwan University, Faculty of Engineering, Mattareya BranchEngineering Research Journal1110-5615171020210901Improving Energy Efficiency performance utilizing building envelope design in High standard housing in Egypt33035119623810.21608/erj.2021.196238ENMarwaSamir A. ShawkatArchitectural EngineerMohamedAbdel Mageed DiabAssociate Prof. Architectural Engineering Dept. Faculty of Engineering
Helwan UniversityAhmedHaleem Hussien Abdel AzizAssistant Prof. Architectural Engineering Dept. Faculty of Engineering
Helwan UniversityJournal Article20210926Nowadays Climate change is the main dilemma urging the world actions to mitigate it,<br /> mainly through fossil fuel independency and energy consumption management. Energy<br /> deficient performance of the building envelope in residential buildings is a major driver<br /> increasing energy consumption rates. Since the cooling loads and lighting are on top of<br /> the electric consumption rates in housing, then a key mitigator to improve the energy<br /> efficiency performance of a building envelope is the adequate management of energy<br /> flow through the household by the passive strategy (cooling and daylighting) techniques<br /> to acquire the best advantage of the local climate. Selecting the high standard housing<br /> segment represented in new Gated communities, spotting the gap between the formal and<br /> new market criteria and how it is widely spreading with no considerations to their<br /> building envelope energy deficiency performance and accumulation of energy<br /> consumption loads urges the need to take the High standard housing into an actual high<br /> standard not only per income level, but also in its energy high performance aligning with<br /> global aspect. Cases studied were analyzed to observe their passive cooling techniques<br /> implemented in the Building Envelope to improve the energy efficiency performance.<br /> Then one base case study (SODIC EAST-MVvilla) is selected and adapted with<br /> previously induced eight passive cooling techniques then simulated with DesignBuilder<br /> software to assess the energy consumption, thermal performance, and CO2 production of<br /> the building. The study resulted in significant electric consumption annual decrease by<br /> 41% thermal comfort annual improvement by 66% that lead to a decrease in CO2<br /> production by 41% annually and that is when a building improves its energy efficiency<br /> utilizing the building envelope using passive cooling strategies.https://erj.journals.ekb.eg/article_196238_0c0e5e3ba217c51c2ea45291508f6381.pdf