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Design And Implement The Innovative Drugstore For Health Care Services Based On Health Mobile Applications And Advanced Iot, Yusur Al - Saffar, Sabah Gitaffa, Abbas H. Issa Mar 2026

Design And Implement The Innovative Drugstore For Health Care Services Based On Health Mobile Applications And Advanced Iot, Yusur Al - Saffar, Sabah Gitaffa, Abbas H. Issa

Engineering and Technology Journal

The health care problems are errors in taking medication, improper storage of the medication, irregularly taking the medication on time, and not knowing the side effects of taking medication with different foods. This work aims to find an integrated system that works on informing people of the medicine they take, the exact dose of the medicine at all times, keeping the medicine from spoiling, alerting the patient to the side effects of the medicine, and creating tables for taking the history of taking medicines. This assists doctors when going to the hospital in emergency cases. The innovative drugstore is built …

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Antenna Gain-Bandwidth Enhancements Using Crlh Hilbert Fractal-Based Structure, Marwa Ismail, Taha Elwi, A. Salim Mar 2026

Antenna Gain-Bandwidth Enhancements Using Crlh Hilbert Fractal-Based Structure, Marwa Ismail, Taha Elwi, A. Salim

Engineering and Technology Journal

With the development of communication systems, antennas of small size and high gain have become essential to keep up with the new challenges. The metamaterials made these challenges possible. In this paper, a new low-profile metamaterials-based array is designed. The array unit cell comprises a symmetric composite right left hand (CRLH) unit cell. A third-order Hilbert curve structure replaces the VIA, and aperiodic slots are introduced between the unit cells to enhance the overall performance. This design provides a significant improvement over the original design. CST MWS was used to stimulate the design. Gain and S11 are calculated to evaluate …

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Improved Design For The High Gain Wideband Matrix Amplifiers Using Differential Cells And Microwave Cmos Technology, Saeed Ridha, Azad Kareem, Ashwaq Hameed Mar 2026

Improved Design For The High Gain Wideband Matrix Amplifiers Using Differential Cells And Microwave Cmos Technology, Saeed Ridha, Azad Kareem, Ashwaq Hameed

Engineering and Technology Journal

The Matrix Amplifier is a structure designed to increase the gain of the wideband distributed amplifiers. A matrix amplifier is used to improve the pass-band gain while preserving the dispersed design-wide characteristics to use the multiplicative gain mechanism. In this paper, the matrix distributed amplifier methodology is developed using differential cells instead of active amplifier cells to improve the wideband characteristics. Shunt capacitances are connected in the centerline to absorb the peaking impact at a cut-off frequency and reduce gain ripples. As an application of the ideas and concepts of matrix amplifiers, a modified step-by-step design of rows 4 and …

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Cnn-Based Visual Localization For Autonomous Vehicles Under Different Weather Conditions, Shahad Ghintab, Mohammed Hassan Mar 2026

Cnn-Based Visual Localization For Autonomous Vehicles Under Different Weather Conditions, Shahad Ghintab, Mohammed Hassan

Engineering and Technology Journal

Autonomous vehicles (AV) are expected to improve, transform, and revolutionize ground transportation. Previous techniques are dependent on localization employing pricey inaccuracy Global Positioning sensor. Furthermore, the performance loss is caused by drifting errors of Simultaneous Localization and Mapping. Regarding categorizing and analyzing texture, cameras are much more accessible and practical. This work contributes to obtaining high accuracy for AV localization and reducing errors in predicted positions. Based on the light, accurate, and robust proposed Convolutional Neural Network (CNN), it will scale down the computational complexity and shorten the training time. Considering various weather and time of day conditions such as …

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A Modification Of Shortest Path Algorithm According To Adjustable Weights Based On Dijkstra Algorithm, Luay Jabbar, Eyad Abass, Sundus Hasan Mar 2026

A Modification Of Shortest Path Algorithm According To Adjustable Weights Based On Dijkstra Algorithm, Luay Jabbar, Eyad Abass, Sundus Hasan

Engineering and Technology Journal

It is possible to represent the road map on the paper and study it using Dijkstra`s algorithm to find the shortest path on the real earth. Dijkstra`s Algorithms are used for calculating the shortest path from source to sink to enable query operations that follow. Dynamic shortest-route techniques are needed to accommodate the modifications within the underlying community topology. Every solution includes figuring out the nodes whose shortest routes could be impacted through the updates and producing a list of affected vertices and their updated shortest pathways. In this work, the advent of the retroactive priority queue information structure makes …

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Review On Virtual Inertia Control Topologies For Improving Frequency Stability Of Microgrid, Raof Idan, Ali Mahdi, Thamir Abdul Wahhab Mar 2026

Review On Virtual Inertia Control Topologies For Improving Frequency Stability Of Microgrid, Raof Idan, Ali Mahdi, Thamir Abdul Wahhab

Engineering and Technology Journal

Renewable energy sources (RESs), such as solar and wind power, offer new technologies for meeting the world's energy requirements. The distributed generator (DG) based on RESs has no rotational mass and damping effects compared to the traditional power system with synchronous generators (SG). However, the increasing penetration level of DG based on RESs causes low inertia, a dampening effect on the dynamic performance of the grid, and stability. A solution to improve the frequency stability of such a system is to provide virtual inertia by using virtual synchronous generators (VSG), which can be created by using short-term energy storage and …

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Adaptive Neuro-Fuzzy Voltage Control For Lcl-Filter Grid-Connected Converter, Safa Olwie, Abdulrahim Humod, Fadhil Hasan Mar 2026

Adaptive Neuro-Fuzzy Voltage Control For Lcl-Filter Grid-Connected Converter, Safa Olwie, Abdulrahim Humod, Fadhil Hasan

Engineering and Technology Journal

Inductance – Capacitance – Inductance (LCL) filter is a very attractive candidate for renewable energy system applications due to its high efficiency. High attenuation of the switching frequency harmonics, small size, low fee, and improving the overall harmonic distortion (THD). This paper presents how voltage is affected by increased loads or voltage sag. Therefore it is necessary to control it with certain controllers. The Adaptive Neuro-Fuzzy Inference System (ANFIS) is used as an intelligent controller, the voltage constraint as training data for ANFIS obtained from PI. The filter works in a good connection between the inverter and the grid and …

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Performance Evaluation Of Integrated Antennas On Photovoltaic Solar Cells, Ahmed Al-Alawi, Said Al Gheilani, Ahmed Al-Zeidi, Mohammed Bait-Suwailam Mar 2026

Performance Evaluation Of Integrated Antennas On Photovoltaic Solar Cells, Ahmed Al-Alawi, Said Al Gheilani, Ahmed Al-Zeidi, Mohammed Bait-Suwailam

Engineering and Technology Journal

The performance of antennas is critical to ensuring reliable wireless communication and robust data transmission. Unfortunately, antennas’ performance gets degraded when loaded with lossy materials. This paper presents the numerical and experimental evaluation of low-profile antennas’ performance when integrated with photovoltaic (PV) solar cells for potential use in smart grid and green power networks. Such integrated antennas can serve as a communication unit and sensors to monitor PV solar cells. For convenience, a microstrip patch antenna was used in this assessment study, where the antenna was designed, numerically simulated, and experimentally tested. After which, it was installed on top of …

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A Modified Global Management Controller For A Grid-Connected Pv System With Battery Under Various Power Balance Modes, Diana Obaid, Ali Mahdi, Mohammed Alkafaji Mar 2026

A Modified Global Management Controller For A Grid-Connected Pv System With Battery Under Various Power Balance Modes, Diana Obaid, Ali Mahdi, Mohammed Alkafaji

Engineering and Technology Journal

This work presents an Energy Management System (EMS) constructed on dissimilar power balance modes and dynamic grid power to activate a DC-link microgrid with a solar (PV-array) generator and battery storage. In addition, the option of requesting adjustable power from the grid to encounter load demand is also presented.  Based on the availability of solar sources, battery state, and grid power, energy management offers the appropriate references for all modes. Six power balance options are defined based on power supply, storage system, and grid mobility to match the load requirement. The aims are to reduce energy usage and upsurge the …

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Reliability Assessment Based On Optimal Dgs Planning In The Distribution Systems, Ali Jaleel, Mohammed Abd Mar 2026

Reliability Assessment Based On Optimal Dgs Planning In The Distribution Systems, Ali Jaleel, Mohammed Abd

Engineering and Technology Journal

Due to increased load demands, distribution systems suffer from high power losses, low voltage levels, high current, and low reliability. To solve these problems, integrate distributed generator units (DG) into the distribution system. DG units are among the most popular methods of improving distribution system reliability, power losses, and bus voltage improvement through the placement and selection of distributed generator units in an optimal location and size. This work proposed Enhanced Particle Swarm Optimization (EPSO) technology to find the optimum location and size of DG units to reduce power losses, improve bus voltage level, and employed the Transient Electricity Analyzer …

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The Structural And Optical Investigation Of Grown Gan Film On Porous Silicon Substrate Prepared By Pld, Haneen Jabar, Makram Fakhri, Mohammed Abdulrazzaq, Subash C. B. Gopinath Mar 2026

The Structural And Optical Investigation Of Grown Gan Film On Porous Silicon Substrate Prepared By Pld, Haneen Jabar, Makram Fakhri, Mohammed Abdulrazzaq, Subash C. B. Gopinath

Engineering and Technology Journal

The optical properties of a grown gallium nitride (GaN) thin film on a porous silicon (P-Si) substrate was investigated. A Photo-electrochemical etching method was used to synthesize the Psi substrate, and a physical deposition method (pulsed laser deposition) of 1064 nm Q-switch Nd: YAG laser with a vacuum of 10−2 mbar was used to grow a thin layer of GaN on a prepared P-Si substrate. X-Ray diffraction displayed that GaN film has a high crystalline nature at the (002) plane. The photoluminescence of GaN film exhibited ultraviolet PL with a peak wavelength of 374 nm corresponding to GaN material and …

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Gaussian Process For Gps Receiver Predictor And Ins Gps Integration, Nawras Ahmed, Sameir Aziez, Ali Khenyab Mar 2026

Gaussian Process For Gps Receiver Predictor And Ins Gps Integration, Nawras Ahmed, Sameir Aziez, Ali Khenyab

Engineering and Technology Journal

Global Positioning System (GPS) has become important and necessary in daily life.  It is possible to reach any destination using GPS, which is included in many lands and marine applications.  In this work, GPS was applied to a real navigation boat, integrated with the inertial navigation system (INS) device, and installed on the boat. The navigational devices were linked to the (mission planer) program, through which the results of the navigation process were shown. The system can provide better navigation performance accuracy and reliability due to the integration between GPS and INS. The data extracted from the navigation devices are …

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Effect Of Copper Foam Baffles On Thermal Hydraulic Performance For Staggered Arrangement In A Duct, Karrar Fadhala, Ekhlas Fayyadh, Ali Mohammed Mar 2026

Effect Of Copper Foam Baffles On Thermal Hydraulic Performance For Staggered Arrangement In A Duct, Karrar Fadhala, Ekhlas Fayyadh, Ali Mohammed

Engineering and Technology Journal

Metal foam is a novel material recently utilized in baffles as an alternative to solid baffles for reducing flow resistance. However, copper foam baffles have been suggested in this research to overcome this issue. So, the experimental tests were carried out in a manufactured square channel (250 mm x 250 mm) and heated uniformly at the bottom wall of the test section.Its walls are mounted copper foam baffles at a fixed porosity of 95%.Baffles were fixed alternatively on the top and bottom of the walls in staggered mode between two successive baffles (center to center) and were kept constant at …

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The Effect Of Eichhornia Crassipes Biodiesel/Lpg Dual-Fuel On Performance And Emissions In A Single-Cylinder Compression Ignition Engine, Hawraa Mohammed, Mahmoud Mashkour Mar 2026

The Effect Of Eichhornia Crassipes Biodiesel/Lpg Dual-Fuel On Performance And Emissions In A Single-Cylinder Compression Ignition Engine, Hawraa Mohammed, Mahmoud Mashkour

Engineering and Technology Journal

This study investigates the effects of Eichhornia Crassipes Biodiesel (ECB) with liquefied petroleum gas (LPG) dual-fuel on diesel engine performance and exhaust emissions characteristics. A four-stroke, single-cylinder and water-cooled diesel engine was used. The engine was operated with pure Iraqi diesel (PID) as a reference fuel, 40% ECB-60% PID, and duel fuel mode (DFM) (40% ECB-60% PID-2.4 l/min LPG). The experimental testing was carried out at 1500 rpm constant engine speed, compression ratio 18, and time injection 23° bTDC under various load conditions (25%, 50%, 75%, and 100%) full load. Using a gas analyzer, the engine emissions, including carbon dioxide …

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The Effect Of Rectangular Grooves On The Lubrication Mechanism In An Inclined Slider Bearing, Muhannad M.Mrah, Ammar S.Hamid Merza Mar 2026

The Effect Of Rectangular Grooves On The Lubrication Mechanism In An Inclined Slider Bearing, Muhannad M.Mrah, Ammar S.Hamid Merza

Engineering and Technology Journal

This research aims to study the effect of rectangular grooves on the lubrication mechanism in an inclined slider bearing. Reynolds' equation was used in the theory part to calculate the pressure gradient in a one-dimensional fluid film. The tilted sliding bearing compared the practical results, where the researcher manufactured and developed the device by adding pressure sensors along with the pad. These sensors will give accurate readings because they will read the pressure directly from the bottom of the pads without manometer tubes. Four pads were manufactured, one without grooves and three with rectangular grooves, varying slot widths (3, 5, …

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Experimental Study Convection Heat Transfer Inside The Triangular Duct Filled With Porous Media, Sabah Mahdi, Suhad Rasheed Mar 2026

Experimental Study Convection Heat Transfer Inside The Triangular Duct Filled With Porous Media, Sabah Mahdi, Suhad Rasheed

Engineering and Technology Journal

Convection heat transfer inside an empty triangular channel when filled with porous media heated proportionally with a constant heat flux (1300 W/m²) at the Reynolds number range (3165- 10910) with packed beds has been studied. The present work investigates porous media experimentally. The packed duct has a length (1 m) and (0.1 m) hydraulic diameter packed with porous material made from spherical glass particles of two different diameters (5 mm, and 10 mm). The value of porosity for the channel is (0.468,0.616 and), respectively. This research studies the effect of changing the Reynolds number and porosity on the enhanced heat …

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Thermoelectric Generators As A Heat Recovery System For Exhaust Gases Of Vehicles Driving At Low Speeds, A. Al-Janabi, O. Al Salmi, E. Al Subhi, A. Al Hadhrami Mar 2026

Thermoelectric Generators As A Heat Recovery System For Exhaust Gases Of Vehicles Driving At Low Speeds, A. Al-Janabi, O. Al Salmi, E. Al Subhi, A. Al Hadhrami

Engineering and Technology Journal

To save the environment and utilize the waste heat associated with exhaust gases of internal combustion engines, it is crucial to design an efficient system that can recover this heat loss and convert it into useful energy. This study is devoted to developing, through an experimental approach, a practical technical solution to minimize the waste heat of the exhaust gases and convert it into a source of power for further applications in the vehicle. Six thermoelectric generators (TEG1-1263-4.3) were attached to the exhaust pipe in an arrangement of three connected in parallel and three connected in series. The thermoelectric generators …

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Omnidirectional Mobil Robot With Navigation Using Slam, Hiba Najim, Iman Kareem, Wisam Abdul-Lateef Mar 2026

Omnidirectional Mobil Robot With Navigation Using Slam, Hiba Najim, Iman Kareem, Wisam Abdul-Lateef

Engineering and Technology Journal

As mobile robots have become widespread in indoor environments with narrow and crowded corridors, such as institutions, the demand for mobile robots has recently increased, especially for service purposes (homes, hospitals, and nursing homes for the elderly). The most important factor of autonomous navigation is the mobile robot's awareness of its surroundings, with the robot's ability to move from one place to another smoothly and safely in terms of avoiding obstacles. In this paper, a mobile robot with multi-directional wheels was designed to work in indoor environments and narrow corridors. SLAM was used to map the environment in which the …

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Thermal Performance Of A Counter-Flow Double-Pass Solar Air Heater With The Steady And Pulsating Flow, Nassr Hussein, Sabah Ahmed, Ali Ekaid Mar 2026

Thermal Performance Of A Counter-Flow Double-Pass Solar Air Heater With The Steady And Pulsating Flow, Nassr Hussein, Sabah Ahmed, Ali Ekaid

Engineering and Technology Journal

The present work studied the influence of pulsating flow as an active method on the thermal performance of a double-pass solar air heater with a tubular solar absorber. A ball valve has been used as a pulse generator mounted at the downstream flow of the solar air heater. The experiments were under indoor conditions with a constant heat flux of 1000 W/m2, and different air mass flow rates ranged from 0.01 to 0.03 kg/s. Moreover, the study covered three pulsation frequencies varied from 1 to 3 Hz. Based on the experimental outcomes, it can be observed that the heat transfer …

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Investigation Of Offshore Wind Turbine Structure Deflection Using Experimental Work, Numerical, And Theoretical Approach, Hayder Ali, Hassan M. Alwan, Israa Al-Esbe, Kochneva V Mar 2026

Investigation Of Offshore Wind Turbine Structure Deflection Using Experimental Work, Numerical, And Theoretical Approach, Hayder Ali, Hassan M. Alwan, Israa Al-Esbe, Kochneva V

Engineering and Technology Journal

Electrical energy from offshore wind turbines is an important source of clean, renewable energy production. One of the reasons for the low efficiency of wind turbines is the change in the flow angle of attack, denoted by the symbol (α), as a result of the deflection of the structure. The study aims to know the values of the maximum deflection of the proposed structure under the environmental conditions of the Arabian Gulf water area. Our research adopted a novel approach to extracting results; the characteristics of sea waves were extracted from the experimental work after fixing five sea waves, knowing …

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Numerical Simulation Of Powering Turbofan Propulsion Aircraft With Electricity, Thomas Onah, Christian Aka, Bethrand Nwankwojike Mar 2026

Numerical Simulation Of Powering Turbofan Propulsion Aircraft With Electricity, Thomas Onah, Christian Aka, Bethrand Nwankwojike

Engineering and Technology Journal

The gas turbine-based propulsion systems were responsible for the emission of pollutants that damage the ecosphere. Commercial aviation represented a large portion of carbon emissions within the aviation industry, so this study focused on novel aircraft propulsion systems for large commercial aircraft. Electric propulsion was considered to be an alternative to conventional propulsion systems. Therefore, this report analyzed the various electric aircraft concepts within the aerospace industry to see whether they have environmental benefits. A flying wing aircraft was compared to a conventional tube-and-wing aircraft using Computational Fluid Dynamics to determine which aircraft requires more power. The lift forces acting …

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Determination Of Impingement Cooling Fluid Temperature-Time Profile For Extracted Tiger-Nut Juice (Cyperus Esculentus) By Lumped Thermal Mass Analysis, Nwankwo, Azubuike, Onah Okechukwu, Egwuagu Onyekachi Mar 2026

Determination Of Impingement Cooling Fluid Temperature-Time Profile For Extracted Tiger-Nut Juice (Cyperus Esculentus) By Lumped Thermal Mass Analysis, Nwankwo, Azubuike, Onah Okechukwu, Egwuagu Onyekachi

Engineering and Technology Journal

Determination of Temperature-Time Profile by the Lumped thermal mass analysis (LTMA) method using Tiger-Nut Juice as the impinging fluid on the cooling system was carried out. With a stationary hot steel plate on a modified run-out table for the top surface controlled the accelerated cooling process. This was evaluated with pipe diameters of 10mm, 15mm, 30mm, 35mm, and 40mm by single jet Tiger-Nut Juice impinging fluid, impingement gaps of 115mm, 125mm, 135mm, 145mm, and 155mm, initial surface temperatures from 450oC – 410oC and at sub-cooled temperatures from 150oC–110oC. The analysis reveals a faster cooling rate for both diameters at an …

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Effects Of Magnetic Field On The Performance Of Solar Distillers: A Review Study, Karrar A. Hammoodi, Hayder Dhahad, Wissam H. ِAlawee, Z.M. Omara, Fadl Essa, A.S. Abdullah, M Amro Mar 2026

Effects Of Magnetic Field On The Performance Of Solar Distillers: A Review Study, Karrar A. Hammoodi, Hayder Dhahad, Wissam H. ِAlawee, Z.M. Omara, Fadl Essa, A.S. Abdullah, M Amro

Engineering and Technology Journal

Due to the rising demand for treated water, the enhancement of potable water yield technologies, such as traditional solar distillers, is a pressing concern. Solar desalination is one of the easiest techniques for producing fresh water from salt water. It has several benefits, not the least. It utilizes free solar energy. Moreover, it is a simple and inexpensive technique compared to other alternatives. They are, nevertheless, relatively inefficient devices. Many studies have been done to boost the daily output of solar stills by using many active strategies to produce a large amount of evaporation and condensation compared to a basic …

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Optimization Process Of Double Spots Welding Of High Strength Steel Using In The Automotive Industry, Hayder Khaleel, Ibtihal Mahmood, Fuad Khoshnaw Mar 2026

Optimization Process Of Double Spots Welding Of High Strength Steel Using In The Automotive Industry, Hayder Khaleel, Ibtihal Mahmood, Fuad Khoshnaw

Engineering and Technology Journal

Resistance Spot Welding (RSW) is one of the most important welding techniques used in the automotive industry because it is an economic process and is suitable for many materials. Many parameters affect the mechanical and microstructural properties of nugget formation and its strength, like welding current, electrode force, and welding time. Therefore, optimizing the RSW process to get the optimum welding parameters is necessary for automobile manufacturing companies. High-strength steel is widely used in the automotive industry because of its superior characteristics such as high strength-weight ratio, ductility, fatigue, and corrosion resistance. This paper presents an optimization process for RSW …

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Dynamic Response Analysis Of The Rotor Using The Jeffcott Method And Performance Improvement Using Active Magnetic Bearing, Karrar Tuaib, Qasim Atiyah, Imad Abdulsahib Mar 2026

Dynamic Response Analysis Of The Rotor Using The Jeffcott Method And Performance Improvement Using Active Magnetic Bearing, Karrar Tuaib, Qasim Atiyah, Imad Abdulsahib

Engineering and Technology Journal

The most common component of mechanical systems today is rotating machines. In these systems, vibration is caused by rotating components. As a result, to decrease the amplitude of vibrations created by rotating equipment, it’s required to understand the behavior of the system. In this work, the problem of vibrations in conventional bearing systems and the effect of adding active magnetic bearings to rotating machines to reduce the amplitude of vibrations are discussed. In this paper, the vibrations in the rotary bearing system were studied theoretically and analytically by using simulation programs to calculate the natural frequencies and parameters affecting the …

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Bearings Health Monitoring Based On Frequency-Domain Vibration Signals Analysis, Saja Jawad, Alaa Jaber Mar 2026

Bearings Health Monitoring Based On Frequency-Domain Vibration Signals Analysis, Saja Jawad, Alaa Jaber

Engineering and Technology Journal

Rotating machine health monitoring is critical for system safety, cost savings, and increased reliability. The need for a simple and accurate fault diagnosis method has led to the development of various monitoring techniques. They incorporate vibration, motor’s current signature, and acoustic emission signals analysis in condition monitoring. So, based on using vibration signal analysis, a test rig was built for bearing fault identification. The test rig replicates and investigates various bearing problems, such as those found in the inner and outer races. An accelerometer, type ADXL335, was interfaced to a data acquisition device (DAQ USB-6215) for collecting vibration signals under …

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A Comparative Study Between Two Lubrication Nano-Additives (Bi2o3 & Tio2) Based On Vibration Response Analysis, Sarah Jaffar, Wafa Soud, Ihsan Baqer Mar 2026

A Comparative Study Between Two Lubrication Nano-Additives (Bi2o3 & Tio2) Based On Vibration Response Analysis, Sarah Jaffar, Wafa Soud, Ihsan Baqer

Engineering and Technology Journal

The purpose of this paper is to present a vibration monitoring analysis of a hydrodynamic journal bearing working with nano-additives lubricants.The vibration response is generated on bearings at various rotational speeds and dynamic load conditions.These bearings were tested experimentally by adding two types of nano additives; Bismuth (3) oxide (Bi2O3), which is considered a green, nontoxic metal, as well as a new additive, and nano Titanium dioxide (TiO2), which is moderately toxic, with SN150 base oil.The performance of additives was studied on the base oil. The comparisons between the two nano-additives Bi2O3 with (1, 2, and 4 wt. %) and …

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Study The Performance Of A Novel Desiccant Heat Exchanger, Hind Taresh, Amar Abdul-Zahra, Ahmed Saleh Mar 2026

Study The Performance Of A Novel Desiccant Heat Exchanger, Hind Taresh, Amar Abdul-Zahra, Ahmed Saleh

Engineering and Technology Journal

Conserving energy and reducing emissions has become a global consensus. However, most air conditioning systems are highly energy-consuming, affecting global warming and the ozone layer because they use chlorine and fluorine refrigerating fluids. Evaporative cooling systems are one of the most important environmentally friendly air conditioning systems with low energy consumption. However, their performance is negatively affected by the high humidity of the inlet air. One of the solutions to control the relative humidity of the inlet air is using desiccant material. In this paper, a silica gel-coated heat exchanger was designed and constructed as a dehumidifying unit. The effect …

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Modal Analysis Of Specific Composite Sandwich Structures, Mustafa Al-Khazraji, Sadeq Bakhy, Muhsin Jweeg Mar 2026

Modal Analysis Of Specific Composite Sandwich Structures, Mustafa Al-Khazraji, Sadeq Bakhy, Muhsin Jweeg

Engineering and Technology Journal

Composite sandwich structures are gaining attention due to their inherent properties, such as lightweight, low density, and high strength. The forced vibration response of these structures was studied experimentally to investigate the effects of external loads on these structures. In this work, four composite sandwich structures were manufactured using carbon fiber, glass fibers, and foam and tested on a specially designed vibration test rig by hitting the specimen with an impact hammer. The response was recorded by an accelerometer attached to the specimens. The accelerometer signal was amplified, and the input and output signals were transferred to LABVIEW via a …

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Heat Pipe Thermal Performance Analysis By Using Different Working Fluids, Ali Soud, Qusay Abdul Ghafoor, Akeel Nazzal Mar 2026

Heat Pipe Thermal Performance Analysis By Using Different Working Fluids, Ali Soud, Qusay Abdul Ghafoor, Akeel Nazzal

Engineering and Technology Journal

This study investigated the thermal performance of the heat pipe and conducted on the effects of working fluids with wick and vertical position. The experiments were conducted using a copper heat pipe with ) a 20.8( mm inner diameter, and the length of the evaporator, the condenser, and the adiabatic regions were 300 mm, 350 mm, and 300 mm, respectively. The working fluids selected were water, Methanol, Ethanol, and different binary mixtures (50: 50) %, (30: 70) %, and (70: 30) % mixing ratios. The filling ratio for all working fluids remained constant with the value of  50% of the …

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