Table of content

Journal of Engineering

مجلة الهندسة

ISSN: 17264073 25203339
Publisher: Baghdad University
Faculty: Engineering
Language: Arabic and English

This journal is Open Access

About

The Journal Engineering was issued in 1986. It was Stopped from 1990 – 1997 because of the economic blockade. It restarted publication after the fourth scientific engineering conference for it published the papers that were accepted in the conference.
It is a scientific engineering journal refereed by specialized and qualified professors in most of the engineering fields and those Specialists in the issued by the college of Engineering university of Baghdad .It was serenely publibued , but from 2011 it has issued of monthly for the numerous papers submitted to the journal to publish their papers in this scientific journal in addition to some of the Arabs professors because the journal is considered one of the valued journals in the Arabic homelan .
Many professions were the head editor of the journal from its first issue. The first one was prof.dr. Laith Ismail Namiq then prof.dr. Mohammed A.Alawis ,prof.dr.Ali A Al – kilidar prof.dr. Abdul-Ilah Younis and currently Prof.dr.Qais S. Ismail.

AIMS AND SCOPE

The Journal of Engineering is an open access, monthly, refereed, peer-reviewed journal. It focuses on the different disciplines of engineering.

Its scope is to cover almost all the aspects of engineering and technology and their related topics. The Journal of Engineering tries to emphasize on publishing high-quality papers with an acceptable, professional and considerable background.

The submitted papers undergo plagiarism, a double-blind peer review by professionals in the paper specific specialty. This process is accomplished according to the Journal criteria of evaluation, where the manuscript, contents, and organization of the paper are to be checked. The papers will be available online for the readers.

Loading...
Contact info

Jadriyah, Baghdad
Iraq
Mobile:+964 7714076860
Email: info@jcoeng.edu.iq
https://www.jcoeng.edu.iq

Table of content: 2018 volume:24 issue:2

Article
Using a New Modification on Wind Turbine Ventilator for Improving Indoor Air Quality
استخدام تعديل جديد على توربينِ رياح التهوية لتحسين نوعية الهواء الداخلي

Loading...
Loading...
Abstract

This paper describes a newly modified wind turbine ventilator that can achieve highly efficient ventilation. The new modification on the conventional wind turbine ventilator system may be achieved by adding a Savonius wind turbine above the conventional turbine to make it work more efficiently and help spinning faster. Three models of the Savonius wind turbine with 2, 3, and 4 blades' semicircular arcs are proposed to be placed above the conventional turbine of wind ventilator to build a hybrid ventilation turbine. A prototype of room model has been constructed and the hybrid turbine is placed on the head of the room roof. Performance's tests for the hybrid turbine with a different number of blades and different values of wind speeds have been conducted. The experimental test results show that the performance of the improved ventilation turbine with three blades is the best. It is found that the maximum rotation speed of the improved turbine is 107rpm, while the air flow rate is 0.0103m3/s and the air change rate per hour is 32.67hr-1, at a wind speed of 3m/s. The proposed design has been achieved an increase in the turbine rotational speed, increase of the extraction rate of the indoor air and the air-changes per hour, provided the requisite ventilation and improved the quality of the indoor air.


Article
The effect of Acculturation on the Plans of Iraqi Origin Elites during the Late Ottoman Rule (1830-1917)
أثر التثاقف على مخططات مساكن النخبة العراقية الأصل خلال حقبة الحكم العثماني المتأخر (1830-1917)

Loading...
Loading...
Abstract

Generally, different propositions show that culture changes because of many factors, and acculturation has emerged out of important operations which lead to cultural change as a result of contact between different societies or cultures. Since the cultural environment with its varying effects plays a major role in the formulation of architectural products, the research defined its research problem as follows: There is need for knowledge to specify the results of acculturation at the level of plans of house architecture belong to Iraqi elites in Baghdad city during the late Ottoman rule in Iraq(1830-1917). The research depends on the comparative procedure to define the acculturation results, so the plans character of the house of Iraqi origin will compare with the plans character for Iraq’s houses before the Ottoman rule in Iraq, and with the plans character of Turkish houses in Anodal during the Ottoman rule. The final conclusion shows that the result of acculturation between the two cultures during the late Ottoman rule at the level of the plans of the Iraqi elite houses represented by the energetic maintenance of the characteristics of the local plan. However, this maintenance began to decline (the start of medium-sized maintenance) beginning at the end of the period studied.


Article
Synchronous Buck Converter with Perturb and Observe Maximum Power Point Tracking Implemented on a Low-Cost Arduino-microcontroller
المحول التزامني الخافض مع تقنية التتبع والاضطراب لنقطة الطاقة العظمى تنفذ على متحكمة الاردوينو واطئة الكلفة

Loading...
Loading...
Abstract

Maximum power point tracking (MPPT) is used in photovoltaic (PV) systems to enhance efficiency and maximize the output power of PV module, regardless the variation of temperature, irradiation, and the electrical characteristics of the load. A new MPPT system has been presented in this research, consisting of a synchronous DC-DC step-down Buck converter controlled by an Arduino microcontroller based unit. The MPPT process with Perturb and Observe method is performed with a DC-DC converter circuit to overcome the problem of voltage mismatch between the PV modules and the loads. The proposing system has high efficiency, lower cost and can be easily modified to handle more energy sources. The test results indicate that the use of the proposed MPPT control with the designed synchronous Buck converter increases the PV output power; hence increases the overall solar system efficiency. The synchronous Buck converter test results used in this design showed high converter efficiency up to 95% of the power produced from the solar module, leading to reduce power loss caused by the power transfer process from PV module to the loads.


Article
Aspects of General & Secondary Indicators that form a Local System to assist Sustainability Verification in Buildings
المؤشرات العامة والثانوية لتكوين منظومة تقويم محلية لتحقق الإستدامة البيئية في الأبنية

Loading...
Loading...
Abstract

The research focuses on how to reach a mechanism that assists experts, engineers, and others in the architectural & engineering project to verify the co-existence of values and sustainability constituents in it. Research problem shows a clear lack, locally, in the interest to establish a value system and a list that cares about comprehending building components whether considering sustainable building criteria. Hypothesis shows that in order to head towards the applicable sustainable approach of buildings, then a local assessment system should be established to evaluate buildings during its life cycle, and from which buildings would be categorized as sustainable or not. Research aims at establishing main and general concepts that form the basis for more accurate assessment elements and details that have weights and credits to reach assessment scores that enables recognizing if the building or the project considers environmental sustainability requirements, in addition to submitting special recommendations that provide the capability of establishing an integrated usable assessment system used by experts and others. The research adopts the following methodology in order to obtain and reaches this list: a comprehensive and thorough study for the main international assessment systems; a study for certain research and papers involved in the assessment topic; inspecting practices of sustainability-related consultancy professional work. All this to determine the constituents of rating and evaluation of the engineering project items and components. Moreover, research adopts a methodology that considers local recognition in terms of social and climatic environment and geographical factors. Research reaches the formation of a general framework that is compromised from general and secondary indicators for the local assessment system, and these indicators could be expanded to include the building entire life cycle.

Keywords


Article
Optimization of Cutting Parameters on Delamination of Drilling Glass-Polyester Composites
أمثلية عوامل التثقيب المؤثره على الانفصال الطبقي الحاصل أثناء تثقيب مواد مركبة من ألياف زجاجية - بوليستر

Loading...
Loading...
Abstract

This paper attempted to study the effect of cutting parameters (spindle speed and feed rate) on delamination phenomena during the drilling glass-polyester composites. Drilling process was done by CNC machine with 10 mm diameter of high-speed steel (HSS) drill bit. Taguchi technique with L16 orthogonal layout was used to analyze the effective parameters on delamination factor. The optimal experiment was no. 13 with spindle speed 1273 rpm and feed 0.05 mm/rev with minimum delamination factor 1.28.


Article
Experimental Investigation of the Electro Co-deposition of (Zinc-Nickel) Alloy
التحقق التجريبي لترسيب سبيكة ( الزنك-نيكل)

Loading...
Loading...
Abstract

An experimental investigation has been carried out for zinc-nickel (Zn-Ni) electro-deposition using the constant applied current technique. Weight difference approach method was used to determine the cathode current efficiency and deposit thickness. Also, the influence effect of current density on the deposition process, solderability, and porosity of the plating layer in microelectronic applications were examined. The bath temperature effect on nickel composition and the form of the contract was studied using Scanning Electron Microscope (SEM). Moreover, elemental nature of the deposition was analyzed by Energy Dispersive X-Ray (EDX). It has been found that the best bath temperature was 40˚C, specifically at a concentration of 73 g/L of NiCl2.6H2O, has a milestone influence on the nickel composition and structure of the deposits. The potential is a major factor influencing the deposition coating alloy which is adjusted by the operations of the cathodic polarization; rather than the standard potential of the two metals as determined by the e.m.f. series. The anomalous deposition was obtained at a current density lower than 0.8 A/dm2, while normal deposition occurred at current densities less than 1.2 A/dm2. Corrosion behavior was exhibited by the bath and for performance was carried out, and it shows that the best corrosion performance was for nickel composition of 10-12.6 wt%.


Article
Statistical analysis of the removal of Chromium(VI)by Iron Oxide Nanoparticle (Fe3O4)
التحليل الإحصائي لإزالة كروم السداسي بواسطة مادة النانو المازة )أوكسيد الحديد)

Loading...
Loading...
Abstract

Investigation of the adsorption of Chromium (VI) on Fe3O4 is carried out using batch scale experiments according to statistical design using a software program minitab17 (Box-Behnken design). Experiments were carried out as per Box-Behnken design with four input parameters such as pH (2-8), initial concentration (50–150mg/L), adsorbent dosage (0.05–0.3 g) and time of adsorption (10–60min). The better conditions were showed at pH: 2; contact time: 60 min; chromium concentration: 50 mg/L and magnetite dosage: 0.3 g for maximum Chromium (VI) removal of (98.95%) with an error of 1.08%. The three models (Freundlich, Langmuir, and Temkin) were fitted to experimental data, Langmuir isotherm has better described the adsorption process. Whereas, the kinetics results of the adsorption process obeyed the pseudo-second-order.


Article
Tuning of PID Controllers for Quadcopter System using Cultural Exchange Imperialist Competitive Algorithm
ضبط قيم المتحكم التناسبي-التفاضلي-التكاملي للطائرات الرباعية باستخدام خوازرمية التبادل المعرفي في تنافس الامبراطوريات

Loading...
Loading...
Abstract

Quadrotors are coming up as an attractive platform for unmanned aerial vehicle (UAV) research, due to the simplicity of their structure and maintenance, their ability to hover, and their vertical take-off and landing (VTOL) capability. With the vast advancements in small-size sensors, actuators, and processors, researchers are now focusing on developing mini UAV’s to be used in both research and commercial applications. This work presents a detailed mathematical nonlinear dynamic model of the quadrotor which is formulated using the Newton-Euler method. Although the quadrotor is a 6 DOF under-actuated system, the derived rotational subsystem is fully actuated, while the translational subsystem is under-actuated. The derivation of the mathematical model was followed by the development of the controller to control the altitude, attitude, heading and position of the quadrotor in space, which is, based on the linear Proportional-Derivative- Integral (PID) controller; thus, a simplified version of the model is obtained. The gains of the controllers will be tuned using optimization techniques to improve the system's dynamic response. The standard Imperialist Competitive Algorithm (ICA) was applied to tune the PID parameters and then it was compared to Cultural Exchange Imperialist Competitive algorithm (CEICA) tuning, and the results show improvement in the proposed algorithm. The objective function results were enhanced by (23.91%) in the CEICA compared with ICA.


Article
A Realistic Aggregate Load Representation for A Distribution Substation in Baghdad Network
تمثيل واقعي متكامل لحمل محطة توزيع ثانوية في شبكة بغداد

Loading...
Loading...
Abstract

Electrical distribution system loads are permanently not fixed and alter in value and nature with time. Therefore, accurate consumer load data and models are required for performing system planning, system operation, and analysis studies. Moreover, realistic consumer load data are vital for load management, services, and billing purposes. In this work, a realistic aggregate electric load model is developed and proposed for a sample operative substation in Baghdad distribution network. The model involves aggregation of hundreds of thousands of individual components devices such as motors, appliances, and lighting fixtures. Sana’a substation in Al-kadhimiya area supplies mainly residential grade loads. Measurement-based techniques are to be used in estimating the substation load model parameters. The proposed model accounts for the effect of the feeders, the LV- transformers and the compensation devices present in the system. The model validation is evident from calculated results comparison to realistic measured data.


Article
Mathematical Modeling of Compaction Curve Using Normal Distribution Functions
التمثيل الرياضي لمنحنيات الرص باستخدام دوال التوزيع الطبيعي

Loading...
Loading...
Abstract

Compaction curves are widely used in civil engineering especially for road constructions, embankments, etc. Obtaining the precise amount of Optimum Moisture Content (OMC) that gives the Maximum Dry Unit weight dmax. is very important, where the desired soil strength can be achieved in addition to economic aspects. In this paper, three peak functions were used to obtain the OMC and dmax. through curve fitting for the values obtained from Standard Proctor Test. Another surface fitting was also used to model the Ohio’s compaction curves that represent the very large variation of compacted soil types. The results showed very good correlation between the values obtained from some published sample tests and the values obtained from curve fitting for both cases of the single curve and multiple Ohio’s curves. The easiness of obtaining OMC and dmax. From the results of curve fitting encourage users to utilize this procedure, in addition to its accuracy.


Article
Upgrading of Alum Preparation and Dosing Unit for Sharq Dijla Water Treatment Plant by Using Programmable Logic Controller System
تطوير وحدة إضافة جرعة الشب لمشروع ماء شرق دجلة باستخدام منظومة السيطرة المنطقية PLC

Loading...
Loading...
Abstract

One of the important units in Sharq Dijla Water Treatment Plant (WTP) first and second extensions are the alum solution preparation and dosing unit. The existing operation of this unit accomplished manually starting from unloading the powder alum in the preparation basin and ending by controlling the alum dosage addition through the dosing pumps to the flash mix chambers. Because of the modern trend of monitoring and control the automatic operation of WTPs due to the great benefits that could be gain from optimum equipment operation, reducing the operating costs and human errors. This study deals with how to transform the conventional operation to an automatic monitoring and controlling system depending on a Programmable Logic Controller (PLC) and online sensors for alum preparation and dosing unit in Sharq Dijla WTP. PLC system will receive, analyze transmitting data, compare them with preset points then automatically orders the operational equipment (such as pumps, valves, and mixers) in a way that guarantees the safe and appropriate operation of the unit. As a result of Process and Instrumentation Diagrams (PID) that were prepared in this study, these units can be fully operating and manage by using Supervisory Control and Data Acquisition (SCADA) system.

Table of content: volume: issue: