Ghanim Thiab Hassan - Academia.edu (original) (raw)

Papers by Ghanim Thiab Hassan

As the operating temperatures increase, the efficiency of the solar system will be decreases. The... more As the operating temperatures increase, the efficiency of the solar system will be decreases. Therefore, the examination of the mode of transmission and dissipation of the temperature of the solar panel and its impact on the level of electricity generation of the panel has made a significant contribution to determining the solar panel efficiency. In order to reduce the possibility of excessive heating, in particular its upper part, so, leaving a certain air gap between the hatching roof surface and the panel back at which the solar panel can be allowed heat dissipation. The aim of this work is to study and investigate the impact of the solar panel rear surface temperature on its output. The study was performed experimentally on three heights (10, 20 and 30 cm) in 3 positions. The study was first carried out with three identical panels on one height of the roof, then ,the height of the first panel remains unchanged, while, the other two panels being changed by 20 cm and 30 cm in the ...

Drinking Water Engineering and Science Discussions, 2019

Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the limi... more Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the limitations for using this technique in drinking water purification facilities is the difficulty of quickly removing high chlorine concentrations in water distribution systems or production facilities. In order to use this method in the drinking water industry a shock de-chlorination method should be introduced for producing microorganism and biocide free water. De-chlorination using natural stagnant aeration (leaving the water to lose the chlorine naturally) is the safest known method if compared with chemical and charcoaling methods. Unfortunately, stagnant aeration is a slow process. Therefore, developing a process for accelerating de-chlorination by aeration would pave the way for using shock dechlorination in drinking water industry. Forced air bubbling is a possible technique for de-chlorination but there is lack of data supporting such a process. The theory is that air bubbling has the advantages of higher mass transfer area, higher Reynolds number across the bubble water interface, and higher mass transfer concentration gradient as the bubbling presents a continuous stream of fresh bubbles. All of these factors accelerate aeration to various extents. A 20 cm diameter, 1-meter height column provided with air sparger was designed to collect the desired data used in this study. Trichloroisocyanuric acid, sodium hypochlorite and chlorine gas were the three familiar sources of chlorine used to investigate their response to air bubbling. Chlorine gas was the fastest and safest chlorine source to be dechlorinated. It dropped from 200 ppm to 0.02 ppm within 4 minutes or zero ppm within 6 minutes using an air flowrate of 9 l/min. Sodium hypochlorite decreased from 200 ppm to 0.02 ppm within 6 minutes using air flowrate of 9 l/min. Trichloroisocyanuric acid found to be the chlorine source slowest to respond to de-chlorination. It decreased from 200 ppm to 0.02 ppm within 8 minutes using an air flowrate of 9 l/min. Shock de-chlorination by aeration is found to be a promising method that opens up the drinking water industry and could produce microorganism and biocide free drinking water. One of the major advantages of chlorine is preventing bacterial regrowth if some residual level is maintained along the distribution system. Recently, some European water treatment factories prevented the regrowth; i.e. producing Drink. Water Eng. Sci. Discuss.,

Drinking Water Engineering and Science Discussions, 2019

The main technique for removing bacteria from water for various applications is chemical disinfec... more The main technique for removing bacteria from water for various applications is chemical disinfection. However, this method has many disadvantages such as producing disinfectant by-products (DBPs), biofilm formation and either rendering the water unpotable (at high residual disinfection) or leaving a potential for lethal diseases such as Cholera (if the residual disinfection is too low). Recently, a process was developed for continuous removal of bacteria from water using the principle of froth flotation through compressed air only without any chemicals. This work examines the extent to which chemical free froth flotation can purify drinking water. The experiments were carried out using two flotation columns with different column lengths, each equipped with ceramic air sparger. Raw water containing bacteria was fed into the column from the top. Air was pumped through the water enough to produce a froth which separated the bacteria and, when removed, the bacterial content measured. The results show that the bacterial concentration can be reduced by 55% of its original concentration under the optimal experimental conditions so far found. This suggests that the technique can be used as a pre-purification step to minimize the use of disinfectants; hence their byproducts, and to control biofilm growth. 1. Introduction Froth flotation is a well-known solid-liquid separation technique using hydrophobicity as the driving force. Bacteria and other water microorganisms tend to be hydrophobic and can be removed using such a separation method (Boyles

Drinking Water Engineering and Science Discussions, 2019

Froth flotation is a solid-liquid separation technique that uses hydrophobicity as a driving forc... more Froth flotation is a solid-liquid separation technique that uses hydrophobicity as a driving force. Bacteria and other drinking water microorganisms tend to be hydrophobic and can be removed from water using this application. The biggest limitation against using froth flotation in the drinking water industry is the difficulty of producing froth without chemical "frothers" and holding bacteria in this froth without chemical collectors which deteriorate water taste and odor. Recently, researchers at the University of Sheffield described a method for producing froth using only water and compressed air. This has enabled froth flotation to be studied as an alternative to biocides for the removal of bacteria from drinking water. This work examines the ability of froth, produced by controlling air pumping through a water column, to hold bacteria. Bacteria are moved to the top of the column and collected in the froth. The operating conditions determine the percentage of bacteria removed. At optimum conditions, froth can hold up to 2×10 8 cfu/ml of bacteria. It has been found that air pumping at 130 l/min in a 20 cm diameter column will give the highest froth bacterial content. Time to reach stable froth bacterial concentration is decreased by increasing other variables. With all these reasons and motivations, a trial should be made to investigate the ability of froth produced without chemicals to hold bacteria without using any chemical frothers and collectors.

Drinking Water Engineering and Science Discussions, 2019

Froth flotation is a well-known solid-liquid separation technique. Hydrophobicity is the main dri... more Froth flotation is a well-known solid-liquid separation technique. Hydrophobicity is the main driving force for such processes. Hydrophobic solids attach to air bubbles and rise up while hydrophilic or less hydrophobic species settle down. Froth can be produced with chemical frothers such as alcohols and polyglycols. However, the use of chemicals limits the use of this separation method in applications such as drinking water, food, and pharmaceutical industries. Therefore, developing a technique that produces froth without adding any chemicals would be useful to such industries. This work demonstrates that with suitable operating parameters a 27 cm froth height can be obtained in a 20 cm diameter column by using an air flow rate of 130 l/min. 1 Introduction Froth flotation is a physical separation method using the selective ability of particles to adhere to air bubbles rising in water (Alam and Shang, 2012). The process usually involves addition of chemical reagents to facilitate froth formation as well as attachment to the air bubble. The more hydrophobic materials are collected on the surface where a stable froth forms. The froth is skimmed to produce a "concentrate", leaving the less hydrophobic part to stay as a "tailing" in the bottom of the flotation cell. Chemicals are used for enhancing froth formation and quality, and to control the relative hydrophobicity of the particles (Alam and Shang, 2012;Zech et al., 2012). This separation technique is widely used in industry. Historically, early use was in mining for upgrading mineral ores as a preparation to further purification techniques (Smith et al., 1993;Nagaoka et al., 1999). In the paper industry froth flotation is used to remove hydrophobic impurities such as printing inks and stickers from recycled paper (Finch and Hardie, 1999). Waste water can also be treated by this method. Fats, oils, grease and suspended solids are separated in the Dissolved Air Flotation (DAF) process (Edzwald, 2010). PVC can be separated up to 99.3% from mixtures with PET using bubble flotation (Marques and Tenório, 2000). In biological science, bacterial strains have been separated in the laboratory using froth flotation principles for some

International Journal of Electrical and Computer Engineering, 2021

The use of solar energy may replace the present fossil fuel or gas to produce electricity. The go... more The use of solar energy may replace the present fossil fuel or gas to produce electricity. The goal of this study is to set up a simulation model to survey the performance of a photovoltaic thermal system (PV/T) based on the computational fluid dynamics (CFD) method. Ansys fluent software has been used for the simulation procedure. The electrical panel output and its efficiency were investigated numerically. In addition, the effect of variations in absorbed radiation on inlet fluid and absorber panel temperature on the system performance was investigated. The study was conducted for three cases, in a first case, where there is no refrigerant in the system and in the latter case, at constant fluid rate of the pump, whereas the third case with optimal pump operation. The numerical findings obtained from CFD simulators have been compared with the test records of the experimental results of the literature. The two results have a good agreement. From the obtained results, it can be noted...

GAZI UNIVERSITY JOURNAL OF SCIENCE, 2021

Lead-acid batteries are widely used in the conventional cars as a main electrical energy storage ... more Lead-acid batteries are widely used in the conventional cars as a main electrical energy storage system to supply the power for the following start. In this paper, the efficacy of lead batteries was evaluated and compared against ultra-capacitors and alternative battery designs via a simulationbased model of the complete process. Specifically, several parameters were assessed such as the weight and reliability. The results confirm the consistency of lead-acid batteries as an appropriate replacement to super-capacitors. The findings were also confirmed by actual measurements carried out in the car. Received: 16 July 2021 Accepted: 1 Nov 2021

The proper selection of winding parameters for resonant circuits in inductive power transmission ... more The proper selection of winding parameters for resonant circuits in inductive power transmission systems is an important issue, as it has a significant impact on system performance and power transmission, and these parameters can be optimized. Depending on the relationship between the coil design and the electrical parameters, the optimal number of coils can be selected for different criteria and protection conditions. This paper presents a method for calculating the geometrical and electrical parameters of planar coils used in parallel resonant systems for wireless power transmission (WPT) system, and for selecting the optimal number of coils. The equations for calculating the active resistance and inductance of the coils are normalized based on the given coil design parameters.. Practical examples of application of the selected method to transmitter and receiver windings of WPT systems are given. The obtained results indicates that the system performance and dissipated power are h...

Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the 12 l... more Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the 12 limitations for using this technique in drinking water purification facilities is the difficulty of 13 quickly removing high chlorine concentrations in water distribution systems or production 14 facilities. Forced air bubbling is a possible technique for de-chlorination but there is lack of data 15 supporting such a process. 16 A 20 cm diameter, 1-meter height column provided with air sparger was designed to collect the 17 desired data were used.

Indonesian Journal of Electrical Engineering and Computer Science

In this paper, the effect of the ambient temperature on the PV modules for different angles of in... more In this paper, the effect of the ambient temperature on the PV modules for different angles of inclinations and different intensities of the solar radiation on the surface of the PV module is considered by using empirical correlations for natural convection. An analytical model based on the energy balance equilibrium between the PV module and the environment conditions has been used. Also an expression for calculating the electric power of silicon PV modules in a function of the ambient temperature, the intensity of the solar radiation, the incident angle of the solar radiation to the surface of the PV module and the efficiency of the PV modules at STC conditions have been used. By comparing the obtained both results, it can be seen that the largest deviation between the power values obtained by the analytical model and expression is about (5 %). The results obtained indicates that in the case of a small number of PV modules corresponding to the required number for an average househ...

Tikrit Journal of Engineering Sciences

The aim of this paper is to analyze the influence of adding serial inductance in AC side of the ‎... more The aim of this paper is to analyze the influence of adding serial inductance in AC side of the ‎‎3ph -6 pulse bridge rectifier on the reduction of harmonic distortion rate. A simulated model ‎with serial inductance was analyzed. The 3-phase 6-pulse diode bridge rectifier was chosen ‎because it corresponds to the operation of the 6-pulse thyristor bridge rectifier at maximum ‎load (while keeping the angle α = 0). Both the total harmonic distortion (THDi) and the ‎power factor (PF) for the circuit have been measured. The results obtained of the THDi has ‎been recorded for four values of serial inductance and results was compared with the (IEEE 519-1992) standard. Comparison results indicates ‎that for values of inductive reactance (Xi) up to 67% cause a reduction of THDi which is above the standard values, while for (Xi) more than 67% cause a reduction in THDi within the acceptable standard level. Analyzing of results prove that the adding of serial inductance at the AC ‎side leads t...

Frames are deleted for figures 2 and 3, blank space of figure 3 is reduced. Raw spaces are follow... more Frames are deleted for figures 2 and 3, blank space of figure 3 is reduced. Raw spaces are following the Copernicus template it is 1.5. But, the entire article will be double checked and sent according to the template. The final article

2019 22nd International Conference on Control Systems and Computer Science (CSCS), 2019

The increment in industrial demand for electrical power come to search for alternative clean and ... more The increment in industrial demand for electrical power come to search for alternative clean and cheap energy sources. One of these choices is the renewable energy sources. So, there are some energy sources now can connect to the main electrical distribution networks which may led to influence the stability and performance of the system. In this paper, number of technical parameters related to electrical power quality have been tested in order to determine the influence of integrating the solar source on electrical distribution network. The investigation has been carried out by calculating the losses in active power, reactive power and the voltage value of electrical distribution network after connecting the solar source though the main distribution grid. Simulation model was performed with MATLAB Simulink and the final calculation results were compared with the electrical standard (9-IEEE bus network). The obtained results indicate that the integration of solar source with the load...

IOP Conference Series: Materials Science and Engineering

Use of computer simulation to quantify the effectiveness of blowing agents can be an effective to... more Use of computer simulation to quantify the effectiveness of blowing agents can be an effective tool for optimizing formulations and for the adopting of new blowing agents. This paper focuses on a mass balance on blowing agent during foaming including the quantification of the amount that stays in the resin, the amount that ends up in the foam cells, and the pressure of the blowing agent in the foam cells. Experimental data is presented both in the sense of developing the simulation capabilities and the validating of simulation results.

With the increasing of mobile phones users during the last decades , the potential adverse outcom... more With the increasing of mobile phones users during the last decades , the potential adverse outcomes from exposure to electromagnetic fields (EMF) emitted from different types of these mobile phones has also been increased. In this work the measurement of electric field (EF) emitted from different types of mobile phone have been conducted and the Specific Absorption Rate (SAR) had been mathematically calculated for different types of mobile phones in different ranges from the human head . The comparison of measured levels with the international radiation exposure ICNIRP indicate that they are lay within the standards limits .that means there is no negative effect on human health from the exposure to these radiations if the exposure is for a short and discontinues periods

3RD INTERNATIONAL SCIENTIFIC CONFERENCE OF ALKAFEEL UNIVERSITY (ISCKU 2021)

The huge advance in electrical technology in the last decades cause an increasing in the number o... more The huge advance in electrical technology in the last decades cause an increasing in the number of electrical devices in our homes which cause an increasing in the presence of electric and magnetic fields that led to a negative health effects due to exposure to such fields . The aim of this research is to investigate the strength of magnetic fields emitted by some home electrical devices .Measurements were conducted by using the EMF TESTER (EMF 827). Results obtained shows that the practical measurements are consistent with the mathematical calculations. Comparison of these results with the standard guideline limits recommended by the International Commission on NonIonizing Radiation Protection (ICNIRP) shows that they lay within the acceptable limits and that means there is no health risk from exposure to these fields if the exposure is for a short and discontinues periods .

International Journal of Electrical and Computer Engineering (IJECE), 2021

The use of solar energy may replace the present fossil fuel or gas to produce electricity. The go... more The use of solar energy may replace the present fossil fuel or gas to produce electricity. The goal of this study is to set up a simulation model to survey the performance of a photovoltaic thermal system (PV/T) based on the computational fluid dynamics (CFD) method. Ansys fluent software has been used for the simulation procedure. The electrical panel output and its efficiency were investigated numerically. In addition, the effect of variations in absorbed radiation on inlet fluid and absorber panel temperature on the system performance was investigated. The study was conducted for three cases, in a first case, where there is no refrigerant in the system and in the latter case, at constant fluid rate of the pump, whereas the third case with optimal pump operation. The numerical findings obtained from CFD simulators have been compared with the test records of the experimental results of the literature. The two results have a good agreement. From the obtained results, it can be noted...

As the operating temperatures increase, the efficiency of the solar system will be decreases. The... more As the operating temperatures increase, the efficiency of the solar system will be decreases. Therefore, the examination of the mode of transmission and dissipation of the temperature of the solar panel and its impact on the level of electricity generation of the panel has made a significant contribution to determining the solar panel efficiency. In order to reduce the possibility of excessive heating, in particular its upper part, so, leaving a certain air gap between the hatching roof surface and the panel back at which the solar panel can be allowed heat dissipation. The aim of this work is to study and investigate the impact of the solar panel rear surface temperature on its output. The study was performed experimentally on three heights (10, 20 and 30 cm) in 3 positions. The study was first carried out with three identical panels on one height of the roof, then ,the height of the first panel remains unchanged, while, the other two panels being changed by 20 cm and 30 cm in the ...

Drinking Water Engineering and Science Discussions, 2019

Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the limi... more Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the limitations for using this technique in drinking water purification facilities is the difficulty of quickly removing high chlorine concentrations in water distribution systems or production facilities. In order to use this method in the drinking water industry a shock de-chlorination method should be introduced for producing microorganism and biocide free water. De-chlorination using natural stagnant aeration (leaving the water to lose the chlorine naturally) is the safest known method if compared with chemical and charcoaling methods. Unfortunately, stagnant aeration is a slow process. Therefore, developing a process for accelerating de-chlorination by aeration would pave the way for using shock dechlorination in drinking water industry. Forced air bubbling is a possible technique for de-chlorination but there is lack of data supporting such a process. The theory is that air bubbling has the advantages of higher mass transfer area, higher Reynolds number across the bubble water interface, and higher mass transfer concentration gradient as the bubbling presents a continuous stream of fresh bubbles. All of these factors accelerate aeration to various extents. A 20 cm diameter, 1-meter height column provided with air sparger was designed to collect the desired data used in this study. Trichloroisocyanuric acid, sodium hypochlorite and chlorine gas were the three familiar sources of chlorine used to investigate their response to air bubbling. Chlorine gas was the fastest and safest chlorine source to be dechlorinated. It dropped from 200 ppm to 0.02 ppm within 4 minutes or zero ppm within 6 minutes using an air flowrate of 9 l/min. Sodium hypochlorite decreased from 200 ppm to 0.02 ppm within 6 minutes using air flowrate of 9 l/min. Trichloroisocyanuric acid found to be the chlorine source slowest to respond to de-chlorination. It decreased from 200 ppm to 0.02 ppm within 8 minutes using an air flowrate of 9 l/min. Shock de-chlorination by aeration is found to be a promising method that opens up the drinking water industry and could produce microorganism and biocide free drinking water. One of the major advantages of chlorine is preventing bacterial regrowth if some residual level is maintained along the distribution system. Recently, some European water treatment factories prevented the regrowth; i.e. producing Drink. Water Eng. Sci. Discuss.,

Drinking Water Engineering and Science Discussions, 2019

The main technique for removing bacteria from water for various applications is chemical disinfec... more The main technique for removing bacteria from water for various applications is chemical disinfection. However, this method has many disadvantages such as producing disinfectant by-products (DBPs), biofilm formation and either rendering the water unpotable (at high residual disinfection) or leaving a potential for lethal diseases such as Cholera (if the residual disinfection is too low). Recently, a process was developed for continuous removal of bacteria from water using the principle of froth flotation through compressed air only without any chemicals. This work examines the extent to which chemical free froth flotation can purify drinking water. The experiments were carried out using two flotation columns with different column lengths, each equipped with ceramic air sparger. Raw water containing bacteria was fed into the column from the top. Air was pumped through the water enough to produce a froth which separated the bacteria and, when removed, the bacterial content measured. The results show that the bacterial concentration can be reduced by 55% of its original concentration under the optimal experimental conditions so far found. This suggests that the technique can be used as a pre-purification step to minimize the use of disinfectants; hence their byproducts, and to control biofilm growth. 1. Introduction Froth flotation is a well-known solid-liquid separation technique using hydrophobicity as the driving force. Bacteria and other water microorganisms tend to be hydrophobic and can be removed using such a separation method (Boyles

Drinking Water Engineering and Science Discussions, 2019

Froth flotation is a solid-liquid separation technique that uses hydrophobicity as a driving forc... more Froth flotation is a solid-liquid separation technique that uses hydrophobicity as a driving force. Bacteria and other drinking water microorganisms tend to be hydrophobic and can be removed from water using this application. The biggest limitation against using froth flotation in the drinking water industry is the difficulty of producing froth without chemical "frothers" and holding bacteria in this froth without chemical collectors which deteriorate water taste and odor. Recently, researchers at the University of Sheffield described a method for producing froth using only water and compressed air. This has enabled froth flotation to be studied as an alternative to biocides for the removal of bacteria from drinking water. This work examines the ability of froth, produced by controlling air pumping through a water column, to hold bacteria. Bacteria are moved to the top of the column and collected in the froth. The operating conditions determine the percentage of bacteria removed. At optimum conditions, froth can hold up to 2×10 8 cfu/ml of bacteria. It has been found that air pumping at 130 l/min in a 20 cm diameter column will give the highest froth bacterial content. Time to reach stable froth bacterial concentration is decreased by increasing other variables. With all these reasons and motivations, a trial should be made to investigate the ability of froth produced without chemicals to hold bacteria without using any chemical frothers and collectors.

Drinking Water Engineering and Science Discussions, 2019

Froth flotation is a well-known solid-liquid separation technique. Hydrophobicity is the main dri... more Froth flotation is a well-known solid-liquid separation technique. Hydrophobicity is the main driving force for such processes. Hydrophobic solids attach to air bubbles and rise up while hydrophilic or less hydrophobic species settle down. Froth can be produced with chemical frothers such as alcohols and polyglycols. However, the use of chemicals limits the use of this separation method in applications such as drinking water, food, and pharmaceutical industries. Therefore, developing a technique that produces froth without adding any chemicals would be useful to such industries. This work demonstrates that with suitable operating parameters a 27 cm froth height can be obtained in a 20 cm diameter column by using an air flow rate of 130 l/min. 1 Introduction Froth flotation is a physical separation method using the selective ability of particles to adhere to air bubbles rising in water (Alam and Shang, 2012). The process usually involves addition of chemical reagents to facilitate froth formation as well as attachment to the air bubble. The more hydrophobic materials are collected on the surface where a stable froth forms. The froth is skimmed to produce a "concentrate", leaving the less hydrophobic part to stay as a "tailing" in the bottom of the flotation cell. Chemicals are used for enhancing froth formation and quality, and to control the relative hydrophobicity of the particles (Alam and Shang, 2012;Zech et al., 2012). This separation technique is widely used in industry. Historically, early use was in mining for upgrading mineral ores as a preparation to further purification techniques (Smith et al., 1993;Nagaoka et al., 1999). In the paper industry froth flotation is used to remove hydrophobic impurities such as printing inks and stickers from recycled paper (Finch and Hardie, 1999). Waste water can also be treated by this method. Fats, oils, grease and suspended solids are separated in the Dissolved Air Flotation (DAF) process (Edzwald, 2010). PVC can be separated up to 99.3% from mixtures with PET using bubble flotation (Marques and Tenório, 2000). In biological science, bacterial strains have been separated in the laboratory using froth flotation principles for some

International Journal of Electrical and Computer Engineering, 2021

The use of solar energy may replace the present fossil fuel or gas to produce electricity. The go... more The use of solar energy may replace the present fossil fuel or gas to produce electricity. The goal of this study is to set up a simulation model to survey the performance of a photovoltaic thermal system (PV/T) based on the computational fluid dynamics (CFD) method. Ansys fluent software has been used for the simulation procedure. The electrical panel output and its efficiency were investigated numerically. In addition, the effect of variations in absorbed radiation on inlet fluid and absorber panel temperature on the system performance was investigated. The study was conducted for three cases, in a first case, where there is no refrigerant in the system and in the latter case, at constant fluid rate of the pump, whereas the third case with optimal pump operation. The numerical findings obtained from CFD simulators have been compared with the test records of the experimental results of the literature. The two results have a good agreement. From the obtained results, it can be noted...

GAZI UNIVERSITY JOURNAL OF SCIENCE, 2021

Lead-acid batteries are widely used in the conventional cars as a main electrical energy storage ... more Lead-acid batteries are widely used in the conventional cars as a main electrical energy storage system to supply the power for the following start. In this paper, the efficacy of lead batteries was evaluated and compared against ultra-capacitors and alternative battery designs via a simulationbased model of the complete process. Specifically, several parameters were assessed such as the weight and reliability. The results confirm the consistency of lead-acid batteries as an appropriate replacement to super-capacitors. The findings were also confirmed by actual measurements carried out in the car. Received: 16 July 2021 Accepted: 1 Nov 2021

The proper selection of winding parameters for resonant circuits in inductive power transmission ... more The proper selection of winding parameters for resonant circuits in inductive power transmission systems is an important issue, as it has a significant impact on system performance and power transmission, and these parameters can be optimized. Depending on the relationship between the coil design and the electrical parameters, the optimal number of coils can be selected for different criteria and protection conditions. This paper presents a method for calculating the geometrical and electrical parameters of planar coils used in parallel resonant systems for wireless power transmission (WPT) system, and for selecting the optimal number of coils. The equations for calculating the active resistance and inductance of the coils are normalized based on the given coil design parameters.. Practical examples of application of the selected method to transmitter and receiver windings of WPT systems are given. The obtained results indicates that the system performance and dissipated power are h...

Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the 12 l... more Shock chlorination is a well-known practice in swimming pools and domestic wells. One of the 12 limitations for using this technique in drinking water purification facilities is the difficulty of 13 quickly removing high chlorine concentrations in water distribution systems or production 14 facilities. Forced air bubbling is a possible technique for de-chlorination but there is lack of data 15 supporting such a process. 16 A 20 cm diameter, 1-meter height column provided with air sparger was designed to collect the 17 desired data were used.

Indonesian Journal of Electrical Engineering and Computer Science

In this paper, the effect of the ambient temperature on the PV modules for different angles of in... more In this paper, the effect of the ambient temperature on the PV modules for different angles of inclinations and different intensities of the solar radiation on the surface of the PV module is considered by using empirical correlations for natural convection. An analytical model based on the energy balance equilibrium between the PV module and the environment conditions has been used. Also an expression for calculating the electric power of silicon PV modules in a function of the ambient temperature, the intensity of the solar radiation, the incident angle of the solar radiation to the surface of the PV module and the efficiency of the PV modules at STC conditions have been used. By comparing the obtained both results, it can be seen that the largest deviation between the power values obtained by the analytical model and expression is about (5 %). The results obtained indicates that in the case of a small number of PV modules corresponding to the required number for an average househ...

Tikrit Journal of Engineering Sciences

The aim of this paper is to analyze the influence of adding serial inductance in AC side of the ‎... more The aim of this paper is to analyze the influence of adding serial inductance in AC side of the ‎‎3ph -6 pulse bridge rectifier on the reduction of harmonic distortion rate. A simulated model ‎with serial inductance was analyzed. The 3-phase 6-pulse diode bridge rectifier was chosen ‎because it corresponds to the operation of the 6-pulse thyristor bridge rectifier at maximum ‎load (while keeping the angle α = 0). Both the total harmonic distortion (THDi) and the ‎power factor (PF) for the circuit have been measured. The results obtained of the THDi has ‎been recorded for four values of serial inductance and results was compared with the (IEEE 519-1992) standard. Comparison results indicates ‎that for values of inductive reactance (Xi) up to 67% cause a reduction of THDi which is above the standard values, while for (Xi) more than 67% cause a reduction in THDi within the acceptable standard level. Analyzing of results prove that the adding of serial inductance at the AC ‎side leads t...

Frames are deleted for figures 2 and 3, blank space of figure 3 is reduced. Raw spaces are follow... more Frames are deleted for figures 2 and 3, blank space of figure 3 is reduced. Raw spaces are following the Copernicus template it is 1.5. But, the entire article will be double checked and sent according to the template. The final article

2019 22nd International Conference on Control Systems and Computer Science (CSCS), 2019

The increment in industrial demand for electrical power come to search for alternative clean and ... more The increment in industrial demand for electrical power come to search for alternative clean and cheap energy sources. One of these choices is the renewable energy sources. So, there are some energy sources now can connect to the main electrical distribution networks which may led to influence the stability and performance of the system. In this paper, number of technical parameters related to electrical power quality have been tested in order to determine the influence of integrating the solar source on electrical distribution network. The investigation has been carried out by calculating the losses in active power, reactive power and the voltage value of electrical distribution network after connecting the solar source though the main distribution grid. Simulation model was performed with MATLAB Simulink and the final calculation results were compared with the electrical standard (9-IEEE bus network). The obtained results indicate that the integration of solar source with the load...

IOP Conference Series: Materials Science and Engineering

Use of computer simulation to quantify the effectiveness of blowing agents can be an effective to... more Use of computer simulation to quantify the effectiveness of blowing agents can be an effective tool for optimizing formulations and for the adopting of new blowing agents. This paper focuses on a mass balance on blowing agent during foaming including the quantification of the amount that stays in the resin, the amount that ends up in the foam cells, and the pressure of the blowing agent in the foam cells. Experimental data is presented both in the sense of developing the simulation capabilities and the validating of simulation results.

With the increasing of mobile phones users during the last decades , the potential adverse outcom... more With the increasing of mobile phones users during the last decades , the potential adverse outcomes from exposure to electromagnetic fields (EMF) emitted from different types of these mobile phones has also been increased. In this work the measurement of electric field (EF) emitted from different types of mobile phone have been conducted and the Specific Absorption Rate (SAR) had been mathematically calculated for different types of mobile phones in different ranges from the human head . The comparison of measured levels with the international radiation exposure ICNIRP indicate that they are lay within the standards limits .that means there is no negative effect on human health from the exposure to these radiations if the exposure is for a short and discontinues periods

3RD INTERNATIONAL SCIENTIFIC CONFERENCE OF ALKAFEEL UNIVERSITY (ISCKU 2021)

The huge advance in electrical technology in the last decades cause an increasing in the number o... more The huge advance in electrical technology in the last decades cause an increasing in the number of electrical devices in our homes which cause an increasing in the presence of electric and magnetic fields that led to a negative health effects due to exposure to such fields . The aim of this research is to investigate the strength of magnetic fields emitted by some home electrical devices .Measurements were conducted by using the EMF TESTER (EMF 827). Results obtained shows that the practical measurements are consistent with the mathematical calculations. Comparison of these results with the standard guideline limits recommended by the International Commission on NonIonizing Radiation Protection (ICNIRP) shows that they lay within the acceptable limits and that means there is no health risk from exposure to these fields if the exposure is for a short and discontinues periods .

International Journal of Electrical and Computer Engineering (IJECE), 2021

The use of solar energy may replace the present fossil fuel or gas to produce electricity. The go... more The use of solar energy may replace the present fossil fuel or gas to produce electricity. The goal of this study is to set up a simulation model to survey the performance of a photovoltaic thermal system (PV/T) based on the computational fluid dynamics (CFD) method. Ansys fluent software has been used for the simulation procedure. The electrical panel output and its efficiency were investigated numerically. In addition, the effect of variations in absorbed radiation on inlet fluid and absorber panel temperature on the system performance was investigated. The study was conducted for three cases, in a first case, where there is no refrigerant in the system and in the latter case, at constant fluid rate of the pump, whereas the third case with optimal pump operation. The numerical findings obtained from CFD simulators have been compared with the test records of the experimental results of the literature. The two results have a good agreement. From the obtained results, it can be noted...