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Investigation Of The Effect Of Microcapsule Additive On Mechanical And Physical Properties Of Concrete, Reem Salmana, Alaa Abdul-Hamead, Farhad Othman Jul 2026

Investigation Of The Effect Of Microcapsule Additive On Mechanical And Physical Properties Of Concrete, Reem Salmana, Alaa Abdul-Hamead, Farhad Othman

Engineering and Technology Journal

Cracks are a fundamental problem in concrete, so this research investigates an experimental study of the effect of adding SiO2 on the self-healing behaviour of concrete. The study is done by studying the physical properties, microstructure, and mechanical properties of concrete. Microcapsules were prepared to contain (cement and nano SiO2) in a (palettization (fluidize bed coating) method) with (5,10, and 15) % of cement weight. The ratio of the prepared concrete mixture was (1: 2: 4) and the ratio of water to cement (W / C) 0.45 by the weight of cement was also added as 0.6% Superplasticizer to all …

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Evaluation Of The Microstructure And Mechanical Properties Of Al / Fe3o4 Nanocomposites, Suaad Jiaad, Khansaa Salman, Ahmed Hussein Jul 2026

Evaluation Of The Microstructure And Mechanical Properties Of Al / Fe3o4 Nanocomposites, Suaad Jiaad, Khansaa Salman, Ahmed Hussein

Engineering and Technology Journal

The goal of this research is to study the microstructural analysis and mechanical properties of an aluminum matrix reinforced with different amounts of nano Fe3O4 at (2, 4, 6, 8, and 10wt. %). Al/ Fe3O4 nanocomposites specimens were prepared using the powder metallurgy route. Many examinations, including Field Emission Scanning Electron Microscopy (FESEM) and X-Ray Diffraction (XRD) analysis, were performed on the specimens in this study to determine the microstructure and phases of the nanocomposites. Mechanical tests, such as compressive, microhardness, and wear tests, were also performed to assess the mechanical properties of the nanocomposites. The results of this study …

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Investigation Of Some Properties For Laminated Composite Used For Prosthetic Socket, Shereen Abdulrahman, Qahtan Hamad, Jawad Oleiwi Jul 2026

Investigation Of Some Properties For Laminated Composite Used For Prosthetic Socket, Shereen Abdulrahman, Qahtan Hamad, Jawad Oleiwi

Engineering and Technology Journal

Polyester has been used as a prosthetic socket base. It is well documented that the raw material of the socket base should have exhibited good mechanical properties. Prosthetic socket is a device that connects an artificial limb with the amputee part. In this work, seven laminated composites were prepared using vacuum technique from polyester resin and reinforced with Jute, Carbon, Glass, and Perlon fibers. The objective of this study is to manufacture prosthetic sockets from different laminated composite materials (fibers reinforced polymer) to make high-strength and durable prosthetic socket design. The results showed that the best laminated composite specimens have …

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Optimization Of Automatic Generation Control And Economic Load Dispatch For Two Area Six Unit Interconnected Power System, Faeq Zwayyer, Afaneen Abbood, Jasim Hussein Jul 2026

Optimization Of Automatic Generation Control And Economic Load Dispatch For Two Area Six Unit Interconnected Power System, Faeq Zwayyer, Afaneen Abbood, Jasim Hussein

Engineering and Technology Journal

This paper proposes an integrated Economic Load Dispatch (ELD) and Automatic Generation Control (AGC) for interconnected power systems. Based on their participation factor determined from the economic load dispatch calculation, each unit shares the total change in the same control region. In this study, two control areas are considered. Three thermal units are located in each control area. An integral controller (I) is only used for the AGC mechanism's secondary controller and is used for the primary controller for the ELD mechanism. An Improved Grey Wolf Optimizer (IGWO) technique is used to evaluate the optimum parameters of the integral controllers …

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Unit Commitment Solution Based On Improved Particle Swarm Optimization Method, Ali Abbas, Afaneen Anwer Jul 2026

Unit Commitment Solution Based On Improved Particle Swarm Optimization Method, Ali Abbas, Afaneen Anwer

Engineering and Technology Journal

This paper presents an algorithm to solve the unit commitment problem using the intelligence technique based on improved Particle Swarm Optimization (IPSO) for establishing the optimal scheduling of the generating units in the electric power system with the lowest production cost during a specified time and subjected to all the constraints. The minimum production cost is calculated based on using the Lambda Iteration method. A conventional method was also used for solving the unit commitment problem using the Dynamic Programming method (DP). The two methods were tested on the 14-bus IEEE test system and the results of both methods were …

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Detection Of Covid-19 Based On Chest Medical Imaging And Artificial Intelligence Techniques, Nawres Alwash, Hussain Kareem Jul 2026

Detection Of Covid-19 Based On Chest Medical Imaging And Artificial Intelligence Techniques, Nawres Alwash, Hussain Kareem

Engineering and Technology Journal

The emergence of COVID-19 disease in the world has moved the wheel of scientific research in order to detect it in the best method, and the fastest of these methods is the use of Artificial Intelligence (AI) techniques to help medical professionals detect COVID-19. The proposed topic is aim to develop algorithm based on combination between imageprocessing techniques with artificial intelligence to diagnose COVID-19. The proposed algorithm consists of five stages to detect and classify COVID-19 from Computer Tomography (CT) images. These stages include; The first of these stages is to collect data from hospitals as real data and from …

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Design And Implementation Of The Temperature Sensor For Health Care Monitoring Based On Optical Fiber Technology, Dawood Ahmed, Alaa Ali, Shehab Kadhim, Sawsan Fandi Jul 2026

Design And Implementation Of The Temperature Sensor For Health Care Monitoring Based On Optical Fiber Technology, Dawood Ahmed, Alaa Ali, Shehab Kadhim, Sawsan Fandi

Engineering and Technology Journal

Human health is represented due to the measurement of vital signs. The basic vital signs are temperature, heart pulse rate, oxygen percentage in blood, blood pressure, etc. These signs are changes according to the physical and mental status of the individual. So measuring and monitoring those signs are very important. In this work, design and implementation of human Temperature Sensor are submitted. This is achieved using optical fiber technology. Two sensor diameters were tested; 125 µm and 60µm. The obtained results show a shifting in wavelength towards the red region due to temperature application. The submitted sensor has good sensitivity …

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Field Oriented Control Of Afpmsm For Electrical Vehicle Using Adaptive Neuro-Fuzzy Inference System (Anfis), Nagham Farhan, Abdulrahim Humod, Fadhil Hasan Jul 2026

Field Oriented Control Of Afpmsm For Electrical Vehicle Using Adaptive Neuro-Fuzzy Inference System (Anfis), Nagham Farhan, Abdulrahim Humod, Fadhil Hasan

Engineering and Technology Journal

Axial Flux Permanent Magnet Synchronous Motor (AFPMSM) are very attractive candidates for driving applications due to their high efficiency, high torque-to-weight ratio, high power density, small magnetic thickness, and simplicity of construction. On the other hand, AFPMSM produces undesirable torque ripple in the developed electromagnetic torque, affecting their output performance. An intelligent control method is proposed in this paper to reduce torque ripple and improve the dynamic performance of AFPMSM.  The vector control, employing the Field Oriented Control (FOC) technique, was used to improve the dynamic performance of the AFPMSM. The speed and torque controllers are achieved using the decoupling …

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Visual Performance Of Refractive Intraocular Lenses Within The Human Eye, Israa Ahmed, Ali Al-Hamdani Jul 2026

Visual Performance Of Refractive Intraocular Lenses Within The Human Eye, Israa Ahmed, Ali Al-Hamdani

Engineering and Technology Journal

The most effective treatment for cataracts is to remove the cloudy crystalline natural lens and implant an intraocular lens (IOL) in its place. These refractive (IOL) provide the same focusing as do the natural lens. Two refractive IOLs are designed and analyzed in this paper—these IOL are made of (PMMA, and Acrylic). The quality of the retinal image is analyzed and compared with the healthy eye, which is based on the (Liou-Brennan) eye model) LBEM). Polychromatic Point Spread Function (PSF), Modulation Transfer Function (MTF), spot diagram, Encircled Energy (EE), and monochromatic aberration are used as acceptable criteria within the Zemax …

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A Visual Enhancement Quality Of Digital Medical Image Based On Bat Optimization, Kholood Hussin, Ali Nahar, Hussain Khleaf Jul 2026

A Visual Enhancement Quality Of Digital Medical Image Based On Bat Optimization, Kholood Hussin, Ali Nahar, Hussain Khleaf

Engineering and Technology Journal

Improve medical image visualization is a critical preliminary step before further imagery processing like analyzing texture, extracting features, and segmentation. Imagery noises in medical images are frequently occurred as a consequence of different artificial processes such as acquisition, sending and receiving, and storing & retrieving processes. As a result, the quality of image visualization is degraded. Therefore, a de-noise process is important in order to maintain good image quality for medical purposes. In this paper, medical image enhancement aims to de-noise as much as possible while maintaining detailed features and edges. This work employed an optimization algorithm called "Bat" to …

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Image Processing Technique For Zinc Ion Sensing Using A Crystalline Fiber Sensor, Omar Hassan, Razi Al-Azawi, Bushra Mahdi Jul 2026

Image Processing Technique For Zinc Ion Sensing Using A Crystalline Fiber Sensor, Omar Hassan, Razi Al-Azawi, Bushra Mahdi

Engineering and Technology Journal

In this paper, crystalline optical fibers were used as a sensor for sensing the zinc ion concentration using the image processing technique. The image of the laser spot transmitted through the optical fiber crystal sensor for each concentration of zinc ion solution. The sensor was made by welding a piece of LMA-10 crystal optical fiber from both ends of a single-mode optical fiber to obtain an SM-PCF-SM type sensor. And it is possible to distinguish between one concentration and another by studying the change of the images obtained as a result of changing the concentration of the zinc ion. The …

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Enhancement Of An Iraqi Radial Distribution System Performance Using Multi-Object Particle Swarm Optimization, Hazim Alwazni, Shatha Al-Kubragyi Jul 2026

Enhancement Of An Iraqi Radial Distribution System Performance Using Multi-Object Particle Swarm Optimization, Hazim Alwazni, Shatha Al-Kubragyi

Engineering and Technology Journal

This paper proposes a Multi Object Particle Swarm Optimization (MOPSO) to find the optimal location and capacity of Distributed Generation and D-STATCOM device. The objective function has adapted with a multi -objectives function to improve voltage profile, the voltage stability and reduce the total power loss of the Radial Distribution System (RDS). Basically, the voltage stability index (VSI) has been used to pre-determine the optimal location of DG and D-STATCOM. Then, a MOPSO applies to achieve the suitable size of DG and D-STATCOM units with different load models. The proposed method is compared with other existing methods and it was …

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A Study Of Patient’S Pain Assessment Based On Facial Expression: Issues And Challenges, Elaf Saddam, Saad Mutashar, Wissam Ali Jul 2026

A Study Of Patient’S Pain Assessment Based On Facial Expression: Issues And Challenges, Elaf Saddam, Saad Mutashar, Wissam Ali

Engineering and Technology Journal

Pain is considered as an emotional experience and a restless feeling associated with tissue damage. When the interpretation begins in the brain, the sensation of pain occurs; a signal transmitted to the brain through the nerve fiber. Pain helps the body to stop further damage to the tissues. Since there are numerous ways to convey and feel pain, the perception of pain is special to all. Technology that promotes pain assessment is an urgent need to reduce restless feelings and suffering. This paper aims to demonstrate the issues and challenges facing the patient’s pain assessment based on facial expression. The …

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A Proposed Channel Estimation Based On Enhanced Sub-Carrier Index Modulation And Packet-Discrete Wavelet Transform To Minimize Bit Error Rate, Ansam Jabbar Jul 2026

A Proposed Channel Estimation Based On Enhanced Sub-Carrier Index Modulation And Packet-Discrete Wavelet Transform To Minimize Bit Error Rate, Ansam Jabbar

Engineering and Technology Journal

For Orthogonal Frequency Division Multiplexing (OFDM) and other communication systems, many estimating approaches have been developed to estimate the channel state information and lower the Bit Error Rate (BER). These estimating methods, however, are still subject to the influence of large peak powers compared to average powers. Reduced computational complexity is one of the most significant factors to consider while developing a new estimate algorithm. This study aims to provide a novel design of the Packet-Discrete Wavelet Transform (P-DWT) algorithm for channel estimation in wireless OFDM instead of the fast Fourier transform (FFT). It is presented to retrieve the code …

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Power Optimization Of Binary Multiplier Based On Fpga, Fadi Nasser, Ivan Hashim Jul 2026

Power Optimization Of Binary Multiplier Based On Fpga, Fadi Nasser, Ivan Hashim

Engineering and Technology Journal

In the VLSI circuits, power dissipation is a critical design parameter and it plays a vital role in the performance of different digital systems. The decrease in chip size along with the increase in chip density and complexity will increase the difficulty in designing higher performance and low power digital systems. Therefore, achieving a fast and low power system is the major concern of VLSI designers. Most of the digital systems have different math operations in their architectures. This paper focuses on the multiplication operation. Multiplication requires more iterations, long time, large area, and consumes high power of the digital …

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Signaling Load Reduction In 5g Network And Beyond, Mohammed Waheed, Azzad Saeed, Thanaa Abd Jul 2026

Signaling Load Reduction In 5g Network And Beyond, Mohammed Waheed, Azzad Saeed, Thanaa Abd

Engineering and Technology Journal

A huge traffic flow in the next generation network is anticipated due to the rising in number of users and the new services that need low end-to-end latency causing a large signaling load on the Core Network (CN). In order to mitigate this issue, many revolutionary architectures have been proposed to reduce this burden such as Cloud Radio Access Network (C-RAN). In this paper, a new C-RAN distributed core network architecture has been proposed by splitting some CN functions and grouping them into one location with Base Band Units (BBUs). As a measure of testing the proposed architectures and by …

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Design Of A Boost Converter With Mppt Algorithm For A Pv Generator Under Extreme Operating Conditions, Hussein Hussein, Ali Mahdi, Thamir Abdul-Wahhab Jul 2026

Design Of A Boost Converter With Mppt Algorithm For A Pv Generator Under Extreme Operating Conditions, Hussein Hussein, Ali Mahdi, Thamir Abdul-Wahhab

Engineering and Technology Journal

Photovoltaic generators (PVGs) are one of the most popular renewable energy sources (RESs), which achieve 47% of RES in microgrids. The aim of this work is to design and simulate a PVG system with a rated power of about 1,621 kW at the standard test conditions (STC), i.e., 1,000 W/m2 and 25ºC. The main components of the proposed PVG are 12 PV panels connected in series (the peak power of a PV panel at STC is about 135 W). A DC-DC boost converter is proposed for implementing the maximum power point tracking (MPPT) algorithm. The proposed MPPT algorithm is tested …

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Optimal Localization Of Upfc For Transmission Line Losses Minimizing Using Particle Swarm Optimization, Ihssan Amin, Dhari Mahmood, Ali Numan Jul 2026

Optimal Localization Of Upfc For Transmission Line Losses Minimizing Using Particle Swarm Optimization, Ihssan Amin, Dhari Mahmood, Ali Numan

Engineering and Technology Journal

Losses in the transmission line have a significant and growing impact on power systems around the world. Line losses overheat power lines, therefore electrical power systems require powerful processors and intelligent management methods. Flexible AC Transmission System (FACTS) device UPFC is one of the most important devices due to its ability to reduce total line losses that cause an increase in the transmission line capacity of the power system. In this paper, we used Particle Swarm Optimization (PSO) to determine the optimal location for the installation of UPFC device to minimize losses in the transmission line in the Iraqi international …

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Reducing Vibrations Generated In A Gas Turbine Model Ms9001e Used In South Baghdad Power Plant Station By Improving The Design Of Bearings With Damper, Alaa Abdulah, Muhannad Khalifa, Abdul Jabbar Hanfesh Jul 2026

Reducing Vibrations Generated In A Gas Turbine Model Ms9001e Used In South Baghdad Power Plant Station By Improving The Design Of Bearings With Damper, Alaa Abdulah, Muhannad Khalifa, Abdul Jabbar Hanfesh

Engineering and Technology Journal

Gas turbines are engines an energy plant makes use of for generating the rotary motion to show power generators. The gas turbine is largely a combustion engine for changing natural gas or different liquid fuels to rotational mechanical energy. Often, the gas turbine generates excessive noise or vibrations. In this work, the problem of vibrations occurrence in the gas turbine model MS9001E used in the south Baghdad power station is solved. This is done by making a groove in the bearing pad to increase the oil flow, replacing the bearing type with a tilt-pad bearing type with damper. The finite …

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Preparing Nanofluids (Al2o3) For Enhancement Performance Of Photovoltaic, Mohammed Saadoon, Ibtisam Hasan, Mohammed Mohammed Jul 2026

Preparing Nanofluids (Al2o3) For Enhancement Performance Of Photovoltaic, Mohammed Saadoon, Ibtisam Hasan, Mohammed Mohammed

Engineering and Technology Journal

Photovoltaic (PV) panels produce electrical energy comparable to the cumulative amount of PV radiation generated on surface of sun. The solar modules influence on temperature of PV panel and for work with its standard specifications in Iraqi environment can be used nanofluid for cooling PV and improve performance. The developed thermal model for proposed cooling method has shown on the way to be an efficient design tool that can help engineers to reduce the time and cost of experimental testing. The improvement in temperature reduction using direct flow technique at rear sides of PV panel achieved electrical and thermal performance …

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Experimental Study Of Air Ejector Performance To Cool Agricultural Products, Hassan Jawad, Qusay Abdul Ghafoor Jul 2026

Experimental Study Of Air Ejector Performance To Cool Agricultural Products, Hassan Jawad, Qusay Abdul Ghafoor

Engineering and Technology Journal

In this research, an ejector was designed and manufactured from brass metal as part of a cooling system to cool agricultural products, work of ejector is based on the Venturi principle. The primary fluid is air and steam of product is the secondary fluid, used the primary pressure (1, 8, 1) bar for the purpose of conducting the experiment. The ejector was manufactured from a number of interconnected parts to give the final shape. The performance of the ejector was analyzed theoretically, through operating of system evaporation of water take place in vessel  leads to cooling product at change operation …

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Distinguish The Textures Of Grasped Objects By Robotic Hand Using Artificial Neural-Network, Hassan Salman, Mohsin Hamzah, Sadeq Bakhy Jul 2026

Distinguish The Textures Of Grasped Objects By Robotic Hand Using Artificial Neural-Network, Hassan Salman, Mohsin Hamzah, Sadeq Bakhy

Engineering and Technology Journal

The object identification properties with tactile sensing are valuable in  interaction with the environment for both humans and robots, and it is the core of sensing used for exploration and determining properties of objects that are inaccessible from visual perception. Object identification often involves with rigid mechanical grippers, tactile information and intelligent algorithms. This paper proposes a methodology for feature extraction techniques and discriminates objects for different softness using adaptive robotic grippers, which are equipped with force and angle sensors in each four fingers of an underactuated robot hand. Arduino microcontroller and the Matlab program are integrated to acquire sensor …

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Numerical Analysis Of Linear Elevator Structure Using Finite Element Method, Saba Othman, Jamal Mohammed, Farag Mohammed Jul 2026

Numerical Analysis Of Linear Elevator Structure Using Finite Element Method, Saba Othman, Jamal Mohammed, Farag Mohammed

Engineering and Technology Journal

In this work, the structure of the linear elevator prototype had been investigated numerically using finite element method. The linear motor structure parameters analyzed using Maxwell ANSYS. The time-stepping method depending on Maxwell equations be applied for analyzing and optimizing the magnetic and force characteristics. While the elevator structure parameters were analyzed using ANSYS workbench based on the principle of virtual work. The frame considered as clamped- clamped beam, and the base of the car considered as thin plate with small deflection. The analysis done with maximum applied load of 360 N at 1.5 safety factor. The results show the …

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The Influence Of Convection Heat Transfers For Vertical Mini-Tubes Using Solvent Carbon Dioxide And Porous Media At Supercritical Pressure, Bilal Kkihlefa, Ameer Jaddoa, Ahmed Reja Jul 2026

The Influence Of Convection Heat Transfers For Vertical Mini-Tubes Using Solvent Carbon Dioxide And Porous Media At Supercritical Pressure, Bilal Kkihlefa, Ameer Jaddoa, Ahmed Reja

Engineering and Technology Journal

Porous media and solvent CO2 at supercritical pressure were investigated experimentally to study the effect of convection heat transfer in vertical mini-tubes. Mini-tubes diameter (5 and 8 mm) with medium porosity of 0.5 are proposed in experimental investigation. Experimental conditions consisted of bulk fluid, wall temperatures ranged from 33 to 55 oC, and 8 to 10 MPa of pressure. Reynolds number, Mass flow rate, and heat flux were 1750 to 21000, 0.5 to 4.5 Kg/h, and 3.25×104 to 1.1×105 W/m2 respectively. Some chemical additives like Ethanol, Chloroform, Acetone, Dimethyl sulfoxide, and Methanol were considered. A special focus was dedicated to …

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A Practical Study Of The Thermal Performance Of A Vacuum Tube For Solar Collector Using A Double -Sided Electronic Curtain With Nano-Fluid, Nagham Majeed, Khalid Sultan, Hosham Anead Jul 2026

A Practical Study Of The Thermal Performance Of A Vacuum Tube For Solar Collector Using A Double -Sided Electronic Curtain With Nano-Fluid, Nagham Majeed, Khalid Sultan, Hosham Anead

Engineering and Technology Journal

In this research, a practical study and appraisal of the thermal performance for the solar collector with vacuum tube has conducted Two types of nanomaterials (aluminum and aluminum oxide) have added to distilled water with nanoparticles diameters of 30 nm and 50 nm respectively. The nanomaterials were used in three several concentrations and three several flow rates which used as a working fluid in evacuated tube solar collector (ETSC) in order to increase the efficiency and beneficial thermal gain. An electronic double-sided reflective and absorbent electronic curtain were added to enhance the performance and control the temperature of the nanoscale. …

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Electricity Generation From Hydro, Wind, Solar And The Environment, Olumide Towoju, Oluwatoyin Oladele Jul 2026

Electricity Generation From Hydro, Wind, Solar And The Environment, Olumide Towoju, Oluwatoyin Oladele

Engineering and Technology Journal

Human actions such as electricity generation are contributory causes of climate change. In a quest to reduce the emission of greenhouse gases associated with electricity generation from fossil fuels, the world is turning to renewables. Renewable sources, however, also do have an impact on the environment. Likewise, renewable electricity generation is also dependent on the climate. Hydro, Wind, and Solar are the popular renewable energy sources for the generation of electricity. This work reviews the impact of these renewables in electricity generation on the environment. It also considers the effect of climate change on its use. The construction of renewable …

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Enhanced Mechanical And Fatigue Properties In Aa5052 Via Tio_2 Nanoparticles Addition Sintering Temperature (St), Zahraa Kadhim, Hussain Alalkawi, Ahmed Reja Jul 2026

Enhanced Mechanical And Fatigue Properties In Aa5052 Via Tio_2 Nanoparticles Addition Sintering Temperature (St), Zahraa Kadhim, Hussain Alalkawi, Ahmed Reja

Engineering and Technology Journal

The goal of the present work is to study the effect of different sintering temperatures (900, 1000 and 1100 ) on fatigue and mechanical characteristics of the metal matrix AA5052 reinforced with 5% of TiO2 nanoparticles. The stir casting process is used for manufacturing of AA5052/TiO2 nanocomposite. The mechanical characteristics of nano composites have been obtained at ambient temperature. The results of mechanical properties showed that the best enhancement in hardness (HB), ultimate tensile strength (UTS) and yield strength (YS) is occurred in nanocomposite with 1000  sintering temperature (ST). However, the fatigue test results showed that the samples manufactured under …

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Experimental Investigation Of Dimensional Accuracy In Non-Traditional Sheet Metal Spinning Process For Producing Rectangular Spun Part, ِِAmmar Saleh, Aseel Abd, Aqeel Bedan Jul 2026

Experimental Investigation Of Dimensional Accuracy In Non-Traditional Sheet Metal Spinning Process For Producing Rectangular Spun Part, ِِAmmar Saleh, Aseel Abd, Aqeel Bedan

Engineering and Technology Journal

The non-conventional spinning process was adopted for producing polygons, but one of the process limitations is the error between design and the final product especially with no-mandrel. Dimensional accuracy was adopted for this purpose which gives an indicator of the ability of the formed part to matches the design and checking validated of the adopted methodology for producing rectangular cross-section spun parts, by comparing the coordinating points of real part with the points of the design model. The point of a real part was measured by using a sphere probe fixed on the three-axis milling machine and capturing the data …

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An Experimental Investigation Of The Dynamic Effects In Upper Drum Boiler Under Steam Mass Flow Rate Variation, Russul Mohammed, Hashim Hussein, Ali Numan Jul 2026

An Experimental Investigation Of The Dynamic Effects In Upper Drum Boiler Under Steam Mass Flow Rate Variation, Russul Mohammed, Hashim Hussein, Ali Numan

Engineering and Technology Journal

The dynamic effects in the “upper“ drum of the boiler (mechanical’s effects) are very complex problems and critical due to the pressure disturbance in the upper drum of the boiler. This work deals with an experimental investigation of the dynamic behavior of the boiler drum level system is reported from plant data (Al-Quds power plant) in Baghdad / Iraq under a particular condition of operating, and the mathematical equations of the boiler model variables explained and defined. The dynamic effects are investigated with increasing steam mass flow rate (10% and 20%) at the outlet of the boiler. The results showed …

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Effect Of Wavy Fins On Thermal Performance Of Double Pass Solar Air Heater, Jalal Jalil, Rasha Nothim, Mustafa Hameed Jul 2026

Effect Of Wavy Fins On Thermal Performance Of Double Pass Solar Air Heater, Jalal Jalil, Rasha Nothim, Mustafa Hameed

Engineering and Technology Journal

In this paper, experimental study on double pass solar air heater with wavy fins absorber has been investigated. The fins attached to the upper and lower surfaces of the absorber. Two wavy fins arrangement (3 and 7 fins) have been investigated with plan absorber by changing solar radiation intensity (500, 600, 700 and 800 W/m2), air mass flow rate form 0.008575 kg/s to 0.0214375 kg/s. The results of wavy finned absorbers are compared with plane and the improving in thermal efficiency reached 80% and 84% in 3 and 7 wavy fins absorbers respectively.

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