Ahmed Y. Qasim, Saifuldeen A. Ahmed, Waleed A. Obaid, Amaal K. Jassim (original) (raw)

Volume 1, Issue 4 by Ahmed Y. Qasim, Saifuldeen A. Ahmed, Waleed A. Obaid, Amaal K. Jassim

Gas turbines are machines that work directly with ambient air, then anything that causes a change... more Gas turbines are machines that work directly with ambient air, then anything that causes a change in the inlet air condition, effect on turbine efficiency. Relative humidity, Mean sea level and environment temperature have a direct effect on gas turbine efficiency. In this research, reviews the type and effect of cooling system on the efficiency and out power turbine. Cooling the turbine inlet air (even by a few degrees) can increase power output substantially. This is because cooled air is denser, giving the turbine a higher mass-flow rate and resulting in increased turbine output and efficiency - even as much as 0.4% per degree Fahrenheit or about 0.7% per degree Celsius. Typically a 1° F temperature increase will result in a 0.5% decrease in power.

Papers by Ahmed Y. Qasim, Saifuldeen A. Ahmed, Waleed A. Obaid, Amaal K. Jassim

Iraqi Journal of Industrial Research

In this paper, bifacial PV module was characterized to investigate the optimum height and tilt an... more In this paper, bifacial PV module was characterized to investigate the optimum height and tilt angle of bifacial solar cells in Baghdad location. The module elevation is a key factor in bifacial PVs because of the effect of self-shading on the amount of diffuse and albedo that can hit the rear side of the panel. This elevation is a function of latitude, daylight time, and season, which is never been determined before in Baghdad location up to our knowledge. Various heights above the ground were used (100, 120, 140, and 160cm), and for each height several tilt angles were taken (0°, 12°, 30°, 49°, and 70°). Data were collected in several days of November, 2020. PV parameters were characterized at each condition. Rated power of the panel showed an increase when elevation increases from 100cm to 120cm then tends to level off at 140cm and 160cm heights. This result suggests that the optimal elevation of a bifacial PV panel in Baghdad city location is 120cm. The results also showed that ...

International journal of scientific research in science, engineering and technology, 2015

In this paper, was the study of wind speed data in different areas of Iraq. The data show that th... more In this paper, was the study of wind speed data in different areas of Iraq. The data show that the province of Basra which taken the mean wind speed value of five years, located on the north of Arabian Gulf perfectly suitable for establish a project wind farm by the fact that the wind speed is acceptable, has also been design and calculation of the power and energy that can be obtained from the wind turbine. The results showed that the proposed wind energy power generating system is a good choice and can be implemented in Basra to provide enough power for small towns and rural areas.

2020 5th International Conference on Communication and Electronics Systems (ICCES), 2020

This paper deals with the design, fabrication and implementation of an efficient method of part-f... more This paper deals with the design, fabrication and implementation of an efficient method of part-feeding mechanism (work-space fixture) for a stationary 2-DOF cylindrical coordinate robot. The aim was to design, fabricate each part of the unit with indigenous components and construct a prototype of an part- feeding mechanism such as a conveyer belt for a robotic system to pick up parts from one place and keep it at another place, say in a container. This is achieved by means of a robot which is used in conjunction with the conveyor belt mechanism for performing an assembly operation, say, a PNP operation and interacting with each other and control it with a Graphical User Interface (GUI) software written in Visual Basic (VB) language while performing an assembly operation avoiding all the obstacles in its path of motion from the source to the destination. The objective of this work was to build a low cost part-feeding mechanism to the robot that could perform simple industrial manipulation tasks like picking up of manufactured components from conveyer belt and placing in a bin or a container. The simulation, design, fabrication and implementation of the work is divided into different stages, viz., Design and fabrication of the mechanical hardware of the robotic system, Design of the electrical / electronic hardware for the robot system, Development of the control software and various algorithms by developing a user friendly GUI using Visual Basic language in order to control the entire designed and fabricated robotic system, Integration of all the above three stages to perform an application such as grasping of objects which are arriving on a conveyor belt and placing in an container such as a bin and repeating the same task again and again.

IIUM Engineering Journal, 2012

ABSTRACT: This study describes the design of a special type of vertical axis rotor wind turbine w... more ABSTRACT: This study describes the design of a special type of vertical axis rotor wind turbine with moveable vertically positioned vanes. The novel design increases the torque in the left side of the wind turbine by increasing the drag coefficient. It also reduces the negative torque of the frame which rotates contrary to the wind in the other side. Two different types of models, having different vane shapes (flat vane and cavity shaped vane), were fabricated. Each type consisted of two models with varying number of frames (three and four frames). The models were tested in a wind tunnel with variable wind speed in order to understand the effect of shape, weight, and number of frames on the power coefficient of the wind turbine. ABSTRAK: Di dalam kajian ini, rotor turbin angin berpaksi vertikel sebagai rangka khusus telah direkabentuk dengan lokasi vertikel mudahalih oleh bilah kipas. Rekabentuk ini meningkatkan tork di bahagian kiri turbin angin dengan meningkatkan pekali seretan ...

ABSTRACT Wind energy has often been touted as one of the most reliable sources of renewable energ... more ABSTRACT Wind energy has often been touted as one of the most reliable sources of renewable energy that should be used for people. Today, wind energy (mainly by propeller type wind turbines) produces less than one percent of the total energy used worldwide. Practically, a standard three-blade propellers efficiency of use of the wind energy is around twenty percents and this is due to its design and shape that use the wind lift force and a rotating turbine. In addition, these turbines are quite expensive due to the complex aerodynamic shape of the propellers which are made of composite materials. The new world boom for wind turbines obliges inventors to create new wind turbine designs that have high efficiency and are better than any known design. This paper proposes the new patented invention of the vane-type wind turbine which uses wind energy more efficiently and is only dependent on the acting area of the vanes. The vane wind turbine was designed to increase the output of a wind turbine that uses kinetic energy of the wind. Due to its high efficiency, simple construction and technology, the vane wind turbine can be used universally, apart from the fact that it is made from cheap materials. The new design of the vane-type wind turbine has quite small sizes than the propeller type one of same output power.

Australian Journal of Basic and …, 2011

Abstract: This paper designs the rotor wind turbine, which uses more effectively the wind energy ... more Abstract: This paper designs the rotor wind turbine, which uses more effectively the wind energy and depends only on the acting area of the vanes. The vane wind turbine is designed to reduce negative torque in the frame work at the opposite direction of wind, by ...

In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This d... more In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This design is presented as vertical locations of the three movable vanes that create scoop shape when closed. Scoop shape of frame increases the drag factor and increase the torque, in the other side of impeller movable vanes are opened under action of wind and the air pass freely to reduce the negative torque. Fabricate two models of impeller with movable vanes and with fixed vanes model and test it in wind tunnel. The maximum power coefficient for three frames movable vanes is 0.32 and higher than the same dimensions of model with fixed vanes about 11%.

In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This d... more In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This design is presented as vertical locations of the three movable vanes that create scoop shape when closed. Scoop shape of frame increases the drag factor and increase the torque, in the other side of impeller movable vanes are opened under action of wind and the air pass freely to reduce the negative torque. Fabricate two models of impeller with movable vanes and with fixed vanes model and test it in wind tunnel. The maximum power coefficient for three frames movable vanes is 0.32 and higher than the same dimensions of model with fixed vanes about 11%.

Journal of Sustainable Energy and Environment, 2012

This paper proposes the vane wind turbine, which uses more effectively the wind energy and depend... more This paper proposes the vane wind turbine, which uses more effectively the wind energy and depends only on the acting area of the vanes. The vane wind turbine is designed to increase the output of a wind turbine that uses kinetic energy of the wind. This design enables the wind force to close left side vanes and simultaneously opens the right side vanes to allow wind move freely (reduce negative torque). It can be used worldwide due to its high efficiency, simple construction, and simple. Test wind turbine model in wind tunnel to verifying the ability of performance design.

This paper presented a development focusing on VAWTs, Which the rotor axis is perpendicular to th... more This paper presented a development focusing on VAWTs, Which the rotor axis is perpendicular to the direction of the wind. It is presented the performance of the model operating on the drag force having three frames/blades cavity shape with movable vanes, similarity to The performance of a similar prototype vertical axis wind turbines having a scale ratio of 1:10. The present model gives the maximum power coefficient of 0.32 at a wind speed of 8.2 m/s and tip speed ratio of 0.31. Discussed the development of the power coefficient of the wind turbine varying with the test results parameters such as, tip speed ratio, angular velocity and the power generated

International journal of scientific research in science, engineering and technology, 2015

Gas turbines are machines that work directly with ambient air, then anything that causes a change... more Gas turbines are machines that work directly with ambient air, then anything that causes a change in the inlet air condition, effect on turbine efficiency. Relative humidity, Mean sea level and environment temperature have a direct effect on gas turbine efficiency. In this research, reviews the type and effect of cooling system on the efficiency and out power turbine. Cooling the turbine inlet air (even by a few degrees) can increase power output substantially. This is because cooled air is denser, giving the turbine a higher mass-flow rate and resulting in increased turbine output and efficiency - even as much as 0.4% per degree Fahrenheit or about 0.7% per degree Celsius. Typically a 1° F temperature increase will result in a 0.5% decrease in power.

Iranian Journal of Science and Technology-Transactions of Civil Engineering, 2021

This study evaluated and quantified the effect of nanoclay (NC) as an additive for the cement pas... more This study evaluated and quantified the effect of nanoclay (NC) as an additive for the cement paste. Experimental tests and modeling and microstructure tests were conducted to predict the cement paste's flow properties such as yield stress, shear strength (shear stress limit), viscosity, and compression stress at the failure of cement after hardened. Two different rheological models were used to predict the rheological properties of the cement paste, and based on the statistical assessments, the Vipulanandan rheological model predicted the shear stress versus shear strain rate better than the P-E model. The nanoclay (NC)-modified cement paste was measured at 0.35 and 0.45 of water/cement ratios, and the temperature varied between 25 and 75 °C. NC has improved ultimate shear stress and yield stress, respectively, by 22.5%–54.4% and 26.3%–203% based on the NC content, water/cement ratio (w/c), and temperature. TGA tests have shown that 1% of nanoclay reduces the cement weight loss...

Background: This paper presented the effect of weight, number of frames and the rotational speed ... more Background: This paper presented the effect of weight, number of frames and the rotational speed of the rotor on wind turbine efficiency, the greater the number of frames in rotor the exposed area of the air will increase, and therefore that increasing the amount of torque generated, concomitant increase in weight, the higher weight will be caused slow rotational speed. The practical test show that the 4-frame rotor wind turbine gives slightly higher torque than 3-frame rotor wind turbine, however, the power coefficient for 3-frame wind turbine model is higher than of 4-frame wind turbine model for the same wind velocity.

The contribution of this paper is the development of analytical equations for calculation of the ... more The contribution of this paper is the development of analytical equations for calculation of the availability of a machine and its productivity as a function of standard indices of reliability and technical parameters of a machine. The reliability of industrial machines with complex design like automated lines also depends on structural and technical data. The equations of productivity rate with availability allow the output of the automated lines to be modelled and their structures to be defined according to the level of productivity and reliability as a function of technical and technological parameters of industrial machines with complex designs.

Gas turbines are machines that work directly with ambient air, then anything that causes a change... more Gas turbines are machines that work directly with ambient air, then anything that causes a change in the inlet air condition, effect on turbine efficiency. Relative humidity, Mean sea level and environment temperature have a direct effect on gas turbine efficiency. In this research, reviews the type and effect of cooling system on the efficiency and out power turbine. Cooling the turbine inlet air (even by a few degrees) can increase power output substantially. This is because cooled air is denser, giving the turbine a higher mass-flow rate and resulting in increased turbine output and efficiency - even as much as 0.4% per degree Fahrenheit or about 0.7% per degree Celsius. Typically a 1° F temperature increase will result in a 0.5% decrease in power.

Iraqi Journal of Industrial Research

In this paper, bifacial PV module was characterized to investigate the optimum height and tilt an... more In this paper, bifacial PV module was characterized to investigate the optimum height and tilt angle of bifacial solar cells in Baghdad location. The module elevation is a key factor in bifacial PVs because of the effect of self-shading on the amount of diffuse and albedo that can hit the rear side of the panel. This elevation is a function of latitude, daylight time, and season, which is never been determined before in Baghdad location up to our knowledge. Various heights above the ground were used (100, 120, 140, and 160cm), and for each height several tilt angles were taken (0°, 12°, 30°, 49°, and 70°). Data were collected in several days of November, 2020. PV parameters were characterized at each condition. Rated power of the panel showed an increase when elevation increases from 100cm to 120cm then tends to level off at 140cm and 160cm heights. This result suggests that the optimal elevation of a bifacial PV panel in Baghdad city location is 120cm. The results also showed that ...

International journal of scientific research in science, engineering and technology, 2015

In this paper, was the study of wind speed data in different areas of Iraq. The data show that th... more In this paper, was the study of wind speed data in different areas of Iraq. The data show that the province of Basra which taken the mean wind speed value of five years, located on the north of Arabian Gulf perfectly suitable for establish a project wind farm by the fact that the wind speed is acceptable, has also been design and calculation of the power and energy that can be obtained from the wind turbine. The results showed that the proposed wind energy power generating system is a good choice and can be implemented in Basra to provide enough power for small towns and rural areas.

2020 5th International Conference on Communication and Electronics Systems (ICCES), 2020

This paper deals with the design, fabrication and implementation of an efficient method of part-f... more This paper deals with the design, fabrication and implementation of an efficient method of part-feeding mechanism (work-space fixture) for a stationary 2-DOF cylindrical coordinate robot. The aim was to design, fabricate each part of the unit with indigenous components and construct a prototype of an part- feeding mechanism such as a conveyer belt for a robotic system to pick up parts from one place and keep it at another place, say in a container. This is achieved by means of a robot which is used in conjunction with the conveyor belt mechanism for performing an assembly operation, say, a PNP operation and interacting with each other and control it with a Graphical User Interface (GUI) software written in Visual Basic (VB) language while performing an assembly operation avoiding all the obstacles in its path of motion from the source to the destination. The objective of this work was to build a low cost part-feeding mechanism to the robot that could perform simple industrial manipulation tasks like picking up of manufactured components from conveyer belt and placing in a bin or a container. The simulation, design, fabrication and implementation of the work is divided into different stages, viz., Design and fabrication of the mechanical hardware of the robotic system, Design of the electrical / electronic hardware for the robot system, Development of the control software and various algorithms by developing a user friendly GUI using Visual Basic language in order to control the entire designed and fabricated robotic system, Integration of all the above three stages to perform an application such as grasping of objects which are arriving on a conveyor belt and placing in an container such as a bin and repeating the same task again and again.

IIUM Engineering Journal, 2012

ABSTRACT: This study describes the design of a special type of vertical axis rotor wind turbine w... more ABSTRACT: This study describes the design of a special type of vertical axis rotor wind turbine with moveable vertically positioned vanes. The novel design increases the torque in the left side of the wind turbine by increasing the drag coefficient. It also reduces the negative torque of the frame which rotates contrary to the wind in the other side. Two different types of models, having different vane shapes (flat vane and cavity shaped vane), were fabricated. Each type consisted of two models with varying number of frames (three and four frames). The models were tested in a wind tunnel with variable wind speed in order to understand the effect of shape, weight, and number of frames on the power coefficient of the wind turbine. ABSTRAK: Di dalam kajian ini, rotor turbin angin berpaksi vertikel sebagai rangka khusus telah direkabentuk dengan lokasi vertikel mudahalih oleh bilah kipas. Rekabentuk ini meningkatkan tork di bahagian kiri turbin angin dengan meningkatkan pekali seretan ...

ABSTRACT Wind energy has often been touted as one of the most reliable sources of renewable energ... more ABSTRACT Wind energy has often been touted as one of the most reliable sources of renewable energy that should be used for people. Today, wind energy (mainly by propeller type wind turbines) produces less than one percent of the total energy used worldwide. Practically, a standard three-blade propellers efficiency of use of the wind energy is around twenty percents and this is due to its design and shape that use the wind lift force and a rotating turbine. In addition, these turbines are quite expensive due to the complex aerodynamic shape of the propellers which are made of composite materials. The new world boom for wind turbines obliges inventors to create new wind turbine designs that have high efficiency and are better than any known design. This paper proposes the new patented invention of the vane-type wind turbine which uses wind energy more efficiently and is only dependent on the acting area of the vanes. The vane wind turbine was designed to increase the output of a wind turbine that uses kinetic energy of the wind. Due to its high efficiency, simple construction and technology, the vane wind turbine can be used universally, apart from the fact that it is made from cheap materials. The new design of the vane-type wind turbine has quite small sizes than the propeller type one of same output power.

Australian Journal of Basic and …, 2011

Abstract: This paper designs the rotor wind turbine, which uses more effectively the wind energy ... more Abstract: This paper designs the rotor wind turbine, which uses more effectively the wind energy and depends only on the acting area of the vanes. The vane wind turbine is designed to reduce negative torque in the frame work at the opposite direction of wind, by ...

In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This d... more In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This design is presented as vertical locations of the three movable vanes that create scoop shape when closed. Scoop shape of frame increases the drag factor and increase the torque, in the other side of impeller movable vanes are opened under action of wind and the air pass freely to reduce the negative torque. Fabricate two models of impeller with movable vanes and with fixed vanes model and test it in wind tunnel. The maximum power coefficient for three frames movable vanes is 0.32 and higher than the same dimensions of model with fixed vanes about 11%.

In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This d... more In this paper design special frame vertical axis wind turbine and test in the wind tunnel. This design is presented as vertical locations of the three movable vanes that create scoop shape when closed. Scoop shape of frame increases the drag factor and increase the torque, in the other side of impeller movable vanes are opened under action of wind and the air pass freely to reduce the negative torque. Fabricate two models of impeller with movable vanes and with fixed vanes model and test it in wind tunnel. The maximum power coefficient for three frames movable vanes is 0.32 and higher than the same dimensions of model with fixed vanes about 11%.

Journal of Sustainable Energy and Environment, 2012

This paper proposes the vane wind turbine, which uses more effectively the wind energy and depend... more This paper proposes the vane wind turbine, which uses more effectively the wind energy and depends only on the acting area of the vanes. The vane wind turbine is designed to increase the output of a wind turbine that uses kinetic energy of the wind. This design enables the wind force to close left side vanes and simultaneously opens the right side vanes to allow wind move freely (reduce negative torque). It can be used worldwide due to its high efficiency, simple construction, and simple. Test wind turbine model in wind tunnel to verifying the ability of performance design.

This paper presented a development focusing on VAWTs, Which the rotor axis is perpendicular to th... more This paper presented a development focusing on VAWTs, Which the rotor axis is perpendicular to the direction of the wind. It is presented the performance of the model operating on the drag force having three frames/blades cavity shape with movable vanes, similarity to The performance of a similar prototype vertical axis wind turbines having a scale ratio of 1:10. The present model gives the maximum power coefficient of 0.32 at a wind speed of 8.2 m/s and tip speed ratio of 0.31. Discussed the development of the power coefficient of the wind turbine varying with the test results parameters such as, tip speed ratio, angular velocity and the power generated

International journal of scientific research in science, engineering and technology, 2015

Gas turbines are machines that work directly with ambient air, then anything that causes a change... more Gas turbines are machines that work directly with ambient air, then anything that causes a change in the inlet air condition, effect on turbine efficiency. Relative humidity, Mean sea level and environment temperature have a direct effect on gas turbine efficiency. In this research, reviews the type and effect of cooling system on the efficiency and out power turbine. Cooling the turbine inlet air (even by a few degrees) can increase power output substantially. This is because cooled air is denser, giving the turbine a higher mass-flow rate and resulting in increased turbine output and efficiency - even as much as 0.4% per degree Fahrenheit or about 0.7% per degree Celsius. Typically a 1° F temperature increase will result in a 0.5% decrease in power.

Iranian Journal of Science and Technology-Transactions of Civil Engineering, 2021

This study evaluated and quantified the effect of nanoclay (NC) as an additive for the cement pas... more This study evaluated and quantified the effect of nanoclay (NC) as an additive for the cement paste. Experimental tests and modeling and microstructure tests were conducted to predict the cement paste's flow properties such as yield stress, shear strength (shear stress limit), viscosity, and compression stress at the failure of cement after hardened. Two different rheological models were used to predict the rheological properties of the cement paste, and based on the statistical assessments, the Vipulanandan rheological model predicted the shear stress versus shear strain rate better than the P-E model. The nanoclay (NC)-modified cement paste was measured at 0.35 and 0.45 of water/cement ratios, and the temperature varied between 25 and 75 °C. NC has improved ultimate shear stress and yield stress, respectively, by 22.5%–54.4% and 26.3%–203% based on the NC content, water/cement ratio (w/c), and temperature. TGA tests have shown that 1% of nanoclay reduces the cement weight loss...

Background: This paper presented the effect of weight, number of frames and the rotational speed ... more Background: This paper presented the effect of weight, number of frames and the rotational speed of the rotor on wind turbine efficiency, the greater the number of frames in rotor the exposed area of the air will increase, and therefore that increasing the amount of torque generated, concomitant increase in weight, the higher weight will be caused slow rotational speed. The practical test show that the 4-frame rotor wind turbine gives slightly higher torque than 3-frame rotor wind turbine, however, the power coefficient for 3-frame wind turbine model is higher than of 4-frame wind turbine model for the same wind velocity.

The contribution of this paper is the development of analytical equations for calculation of the ... more The contribution of this paper is the development of analytical equations for calculation of the availability of a machine and its productivity as a function of standard indices of reliability and technical parameters of a machine. The reliability of industrial machines with complex design like automated lines also depends on structural and technical data. The equations of productivity rate with availability allow the output of the automated lines to be modelled and their structures to be defined according to the level of productivity and reliability as a function of technical and technological parameters of industrial machines with complex designs.

In this paper design and test special frame vertical axis wind turbine in wind tunnel. This desig... more In this paper design and test special frame vertical axis wind turbine in wind tunnel. This design is presented as vertical locations of the three movable vanes that create scoop shape with closed. Vanes of frame increases the drag factor and increase torque, in the other side vanes are opened and wind pass freely to reduce the negative torque.