Research Paper
Hot Spot Analysis of Photovoltaic Module under Partial Shading Conditions by Using IR-Imaging Technology
Hot Spot Analysis of Photovoltaic Module under Partial Shading Conditions by Using IR-Imaging Technology

Ali. H. Numan; Hashim A. Hussein; Zahraa S. Dawood

Volume 39, Issue 9 , September 2021, Page 1338-1344

https://doi.org/10.30684/etj.v39i9.841

Abstract
  The probable appearance of localized overheating (hot spot) represents one of the main matters for the reliability and safety of c-Si cells. It entails both a risk for the photovoltaic ...  Read More ...
Research Paper
The Influence of Ultrasonic Impact Peening on the Mechanical Properties of Similar Friction Stir Welded Joints of AA 7075-T73
The Influence of Ultrasonic Impact Peening on the Mechanical Properties of Similar Friction Stir Welded Joints of AA 7075-T73

Abdul Ameer H. Jebur; Samir A. Amin; Ibtihal A. Mahmood

Volume 39, Issue 9 , September 2021, Page 1345-1351

https://doi.org/10.30684/etj.v39i9.1725

Abstract
  The purpose of this study is to study the ultrasonic peening influence upon the mechanical properties of the welded joints of 3 mm AA 7075-T73. Friction stir welding (FSW) was carried ...  Read More ...
Research Paper
Optimum Parameter Selection for Milling Different Laminate Composites Made by Hand Layup with CNC Milling Machine
Optimum Parameter Selection for Milling Different Laminate Composites Made by Hand Layup with CNC Milling Machine

Ghadak M. Alkhafaji; Fathi A. Alshamma; Enas A. Khalid

Volume 39, Issue 9 , September 2021, Page 1352-1361

https://doi.org/10.30684/etj.v39i9.1737

Abstract
  Recently, composite materials were widely used in different applications due to their lightweight, and good thermal and mechanical properties. In this study, an attempt to manufacture ...  Read More ...
Research Paper
Effect of Wavy Fins on Thermal Performance of Double Pass Solar Air Heater
Effect of Wavy Fins on Thermal Performance of Double Pass Solar Air Heater

Jalal M. Jalil; Rasha F. Nothim; Mustafa M. Hameed

Volume 39, Issue 9 , September 2021, Page 1362-1368

https://doi.org/10.30684/etj.v39i9.1775

Abstract
  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 ...  Read More ...
Research Paper
Experimental Investigation of Dimensional Accuracy in Non-traditional Sheet Metal Spinning Process for Producing Rectangular Spun Part
Experimental Investigation of Dimensional Accuracy in Non-traditional Sheet Metal Spinning Process for Producing Rectangular Spun Part

ِِAmmar M. Saleh; Aseel H. Abd; Aqeel S. Bedan

Volume 39, Issue 9 , September 2021, Page 1369-1375

https://doi.org/10.30684/etj.v39i9.1974

Abstract
  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. ...  Read More ...
Research Paper
An Experimental Investigation of The Dynamic Effects in Upper Drum Boiler Under Steam Mass Flow Rate Variation
An Experimental Investigation of The Dynamic Effects in Upper Drum Boiler Under Steam Mass Flow Rate Variation

Russul Mohammed; Hashim Hussein; Ali H. Numan

Volume 39, Issue 9 , September 2021, Page 1376-1383

https://doi.org/10.30684/etj.v39i9.1998

Abstract
  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 ...  Read More ...
Research Paper
Enhanced Mechanical and Fatigue Properties In AA5052 Via TiO_2 Nanoparticles Addition Sintering Temperature (ST)
Enhanced Mechanical and Fatigue Properties In AA5052 Via TiO_2 Nanoparticles Addition Sintering Temperature (ST)

Zahraa J. Kadhim; Hussain J.M. Alalkawi; Ahmed H. Reja

Volume 39, Issue 9 , September 2021, Page 1384-1391

https://doi.org/10.30684/etj.v39i9.2020

Abstract
  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 ...  Read More ...
Research Paper
Electricity Generation from Hydro, Wind, Solar and the Environment
Electricity Generation from Hydro, Wind, Solar and the Environment

Olumide A. Towoju; Oluwatoyin A. Oladele

Volume 39, Issue 9 , September 2021, Page 1392-1398

https://doi.org/10.30684/etj.v39i9.2145

Abstract
  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 ...  Read More ...
Research Paper
A Practical Study of The Thermal Performance of a Vacuum Tube For Solar Collector Using a Double -Sided Electronic Curtain With Nano-Fluid
A Practical Study of The Thermal Performance of a Vacuum Tube For Solar Collector Using a Double -Sided Electronic Curtain With Nano-Fluid

Nagham A. Majeed; Khalid F. Sultan; Hosham S. Anead

Volume 39, Issue 9 , September 2021, Page 1399-1408

https://doi.org/10.30684/etj.v39i9.2029

Abstract
  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 ...  Read More ...
Research Paper
The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure
The Influence of Convection Heat Transfers for Vertical Mini-Tubes Using Solvent Carbon Dioxide and Porous Media at Supercritical Pressure

Bilal J. Kkihlefa; Ameer A. Jaddoa; Ahmed H. Reja

Volume 39, Issue 9 , September 2021, Page 1409-1419

https://doi.org/10.30684/etj.v39i9.2068

Abstract
  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 ...  Read More ...
Research Paper
Distinguish the Textures of Grasped Objects by Robotic Hand Using Artificial Neural-Network
Distinguish the Textures of Grasped Objects by Robotic Hand Using Artificial Neural-Network

Hassan D. Salman; Mohsin N. Hamzah; Sadeq H. Bakhy

Volume 39, Issue 9 , September 2021, Page 1420-1429

https://doi.org/10.30684/etj.v39i9.2072

Abstract
  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 ...  Read More ...
Research Paper
Numerical Analysis of Linear Elevator Structure Using Finite Element Method
Numerical Analysis of Linear Elevator Structure Using Finite Element Method

Saba A. Othman; Jamal A.-K. Mohammed; Farag M. Mohammed

Volume 39, Issue 9 , September 2021, Page 1430-1436

https://doi.org/10.30684/etj.v39i9.2083

Abstract
  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 ...  Read More ...
Research Paper
Experimental Study of Air Ejector Performance to Cool Agricultural Products
Experimental Study of Air Ejector Performance to Cool Agricultural Products

Hassan S. Jawad; Qusay J. Abdul Ghafoor

Volume 39, Issue 9 , September 2021, Page 1437-1444

https://doi.org/10.30684/etj.v39i9.2105

Abstract
  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. ...  Read More ...
Research Paper
Preparing Nanofluids (Al2O3) for Enhancement Performance of Photovoltaic
Preparing Nanofluids (Al2O3) for Enhancement Performance of Photovoltaic

Mohammed Saadoon; Ibtisam A. Hasan; Mohammed J. Mohammed

Volume 39, Issue 9 , September 2021, Page 1445-1453

https://doi.org/10.30684/etj.v39i9.2110

Abstract
  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 ...  Read More ...
Research Paper
Reducing Vibrations Generated in a Gas Turbine Model MS9001E Used in South Baghdad Power Plant Station by Improving the Design of Bearings with Damper
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 J. Abdulah; Muhannad Z. Khalifa; Abdul Jabbar O. Hanfesh

Volume 39, Issue 9 , September 2021, Page 1454-1462

https://doi.org/10.30684/etj.v39i9.2134

Abstract
  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 ...  Read More ...