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Amedorme, S.K., (2016). Automotive Electrical Systems.
Abstract
Amedorme,S.K. & Apodi, J. (2016). Influence of Density Ratio on Turbulence in Two Phase Flow. International Journal of Innovative Science, Engineering & Technology, 3,
Abstract
An entirely Eulerian approach treating two phase flow as a single phase with large scale features of the flow dependent only upon density variation is carried out. The average density for the two fluids is defined in the Computational Fluid Dynamics (CFD commercial code STAR-CCM+ and a transport equation tracking the liquid mass fraction models the turbulent mixing of liquid. Standard k-epsilon model is used for the turbulence. The paper shows the results of average density on turbulence and presents the contour plots of flow and turbulence fields such as turbulent kinetic energy and its rate of dissipation. The variations in the density ratios in relation to turbulent parameters are also presented and the noticeable changes in the turbulent quantities are analysed. Key words: Eulerian Model, Density Ratio, Liquid Mass Fraction, Turbulent and Flow Fields
An entirely Eulerian approach treating two phase flow as a single phase with large scale features of the flow dependent only upon density variation is carried out. The average density for the two fluids is defined in the Computational Fluid Dynamics (CFD commercial code STAR-CCM+ and a transport equation tracking the liquid mass fraction models the turbulent mixing of liquid. Standard k-epsilon model is used for the turbulence. The paper shows the results of average density on turbulence and presents the contour plots of flow and turbulence fields such as turbulent kinetic energy and its rate of dissipation. The variations in the density ratios in relation to turbulent parameters are also presented and the noticeable changes in the turbulent quantities are analysed. Key words: Eulerian Model, Density Ratio, Liquid Mass Fraction, Turbulent and Flow Fields
Amedorme,S.K.& Fiagbe,Y.A.K. (2016). Modification of an Existing Small Hydraulic Jack for Lifting Light Duty Vehicle. International Journal of Science and Technology, 5,
Abstract
Hydraulic jack has been used extensively in the maintenance, servicing and repairing of motor vehicles. Although the hydraulic jack serves a wide range of purpose, it has one major problem of unexpected hydraulic failure. This has called for the use of a mechanism or an axle stand when the hydraulic jack is in use. Most often, drivers carry the jack forgetting to go along with the stand. And in the event of any repairs on the road have to use incorrect undersigned or unprescribed supports to assist the jack. This paper highlights on the modification of an existing small hydraulic jack for lifting light duty vehicle. The modified jack has been incorporated with reasonable clutch top, simple locking mechanism and sizeable base to support the weight of the vehicle in the event of any hydraulic failure. The distortion energy theory (DET) is used to predict failure and check the factor of safety. The new modification makes the jack serves multi-purpose function of lifting and acting as supporting unit. It also prevents the frustrations the drivers go through in search for undersigned lifting supports between trips when they encounter a flat tyre as well as eliminates the burden mechanics go through in fixing an axle stand. Key words: Modified Hydraulic Jack, Hydraulic Failure, Failure Prediction, Von Mises
Hydraulic jack has been used extensively in the maintenance, servicing and repairing of motor vehicles. Although the hydraulic jack serves a wide range of purpose, it has one major problem of unexpected hydraulic failure. This has called for the use of a mechanism or an axle stand when the hydraulic jack is in use. Most often, drivers carry the jack forgetting to go along with the stand. And in the event of any repairs on the road have to use incorrect undersigned or unprescribed supports to assist the jack. This paper highlights on the modification of an existing small hydraulic jack for lifting light duty vehicle. The modified jack has been incorporated with reasonable clutch top, simple locking mechanism and sizeable base to support the weight of the vehicle in the event of any hydraulic failure. The distortion energy theory (DET) is used to predict failure and check the factor of safety. The new modification makes the jack serves multi-purpose function of lifting and acting as supporting unit. It also prevents the frustrations the drivers go through in search for undersigned lifting supports between trips when they encounter a flat tyre as well as eliminates the burden mechanics go through in fixing an axle stand. Key words: Modified Hydraulic Jack, Hydraulic Failure, Failure Prediction, Von Mises
Amedorme, S.K. & Burluka, A.A. (2017). Numerical Prediction of Sauter Mean Diameter from Pressure Swirl Atomizer Using Eulerian Model. International Journal of Engineering and Technology, 7,
Abstract
Atomizers are used in many engineering applications including spray combustion in furnaces, diesel engines, gasoline direct injection engines and gas turbine engines. Pressure swirl atomizers occupy a special position amongst other atomizers because they differ in quality of atomization, simplicity of construction, reliability of operation, low clogging and low expenditure of energy. Turbulence behaviour and the mean droplet size are indispensable considerations in the sprays and atomization process of pressure swirl atomizers. This paper presents entirely Eulerian modelling of two phase flow in a pressure swirl atomizer as a single multi-component phase with high density variations using Computational Fluid Dynamics (CFD) commercial code STAR-CD. The transport equations for the liquid surface density and liquid mass fraction are modelled for the flow and turbulent fields. Numerical results such as liquid mass fraction and liquid surface density are presented. The model also shows the results of atomization characteristics such as droplet velocity and predicts Sauter Mean Diameter (SMD) with reasonable order-of- magnitudes. Key words: Sauter Mean Diameter (SMD), Droplet Velocity, Eulerian Modelling, Liquid Mass Fraction, Liquid Surface Density
Atomizers are used in many engineering applications including spray combustion in furnaces, diesel engines, gasoline direct injection engines and gas turbine engines. Pressure swirl atomizers occupy a special position amongst other atomizers because they differ in quality of atomization, simplicity of construction, reliability of operation, low clogging and low expenditure of energy. Turbulence behaviour and the mean droplet size are indispensable considerations in the sprays and atomization process of pressure swirl atomizers. This paper presents entirely Eulerian modelling of two phase flow in a pressure swirl atomizer as a single multi-component phase with high density variations using Computational Fluid Dynamics (CFD) commercial code STAR-CD. The transport equations for the liquid surface density and liquid mass fraction are modelled for the flow and turbulent fields. Numerical results such as liquid mass fraction and liquid surface density are presented. The model also shows the results of atomization characteristics such as droplet velocity and predicts Sauter Mean Diameter (SMD) with reasonable order-of- magnitudes. Key words: Sauter Mean Diameter (SMD), Droplet Velocity, Eulerian Modelling, Liquid Mass Fraction, Liquid Surface Density
Arthur, Y. D. Sekyere, F. Marlle, E K. & Banuenumah, W. (2016). The impact of Service quality on customer satisfaction in Obuasi Electricity Company of Ghana (ECG) - The customers perspective. International Journal of Contemporary Applied Sciences, 3,
Abstract
Globally several studies had been conducted using SERVQUAL model in different discipline and context. However, little had been discussed on comparing the impact of Service quality on customer satisfaction in Electricity Company of Ghana (ECG) from the customer perspective. The study adapted the modified version of SERVQUAL model as a tool to measure the variables of the study. The study used convenience sampling method to select customer of ECG. The questionnaires were distributed and collected for analysis using SPSS and Microsoft Excel Software. Simple Regression was used to test for the impact of service quality on customer satisfaction. The result indicates that all the five dimensions of service quality performed poorly P >0.05. Furthermore the service quality had a negative impact on customer satisfaction and concludes that the service quality deserves improvement. The study finally recommends that staff should be engaged on regular basis to be trained on issues of costumer services and its effects on organizational performance. Further studies on SERVQUAL model using the five service quality dimensions can gradually close the gaps to bring success to the ECG.
Globally several studies had been conducted using SERVQUAL model in different discipline and context. However, little had been discussed on comparing the impact of Service quality on customer satisfaction in Electricity Company of Ghana (ECG) from the customer perspective. The study adapted the modified version of SERVQUAL model as a tool to measure the variables of the study. The study used convenience sampling method to select customer of ECG. The questionnaires were distributed and collected for analysis using SPSS and Microsoft Excel Software. Simple Regression was used to test for the impact of service quality on customer satisfaction. The result indicates that all the five dimensions of service quality performed poorly P >0.05. Furthermore the service quality had a negative impact on customer satisfaction and concludes that the service quality deserves improvement. The study finally recommends that staff should be engaged on regular basis to be trained on issues of costumer services and its effects on organizational performance. Further studies on SERVQUAL model using the five service quality dimensions can gradually close the gaps to bring success to the ECG.
Banuenumah, W .& Awopone, K. A., (2015). Electrical Machines.
Abstract
Banuenumah, W .& Awopone, K. A., (2015). Fundamentals of Electricity and Electronics.
Abstract
S.K. Amedorme & Nsoh, S.N. (2014). Analyzing the causes of road traffic accidents in Kumasi metropolis. International Journal of Engineering Innovation and Research, 3,
Abstract
The study analysed the causes of road traffic accidents in the Kumasi Metropolis in Ghana. Random sampling technique was used to select a sample of 137 drivers of commercial vehicles in the metropolis. Data collection was through a self completion questionnaire, interview and observation. Descriptive statistics and percentages were used to analyse and interpret the data. The findings showed that reckless driving; bad nature of roads and unfavourable weather conditions accounted for the major causes of road traffic accidents in the metropolis. Driving under the influence of alcohol and the use of cell phones while driving came out as minor causes of road traffic accidents. The study also showed that about 30% of the drivers were fully aware that driving under the influence of alcohol leads to road accidents while nearly all drivers admitted to the use of cell phones whilst driving. The drivers were generally satisfied with the roles played by the National Road Safety Commission (NRSC), Motor Traffic and Transport Unit (MTTU) of the Ghana Police Service and Driver and Vehicle Licensing Authority in curbing road traffic accidents. Keywords – Ghana, Road Accidents, Road Traffic Fatalities, Causes of Road Accidents
The study analysed the causes of road traffic accidents in the Kumasi Metropolis in Ghana. Random sampling technique was used to select a sample of 137 drivers of commercial vehicles in the metropolis. Data collection was through a self completion questionnaire, interview and observation. Descriptive statistics and percentages were used to analyse and interpret the data. The findings showed that reckless driving; bad nature of roads and unfavourable weather conditions accounted for the major causes of road traffic accidents in the metropolis. Driving under the influence of alcohol and the use of cell phones while driving came out as minor causes of road traffic accidents. The study also showed that about 30% of the drivers were fully aware that driving under the influence of alcohol leads to road accidents while nearly all drivers admitted to the use of cell phones whilst driving. The drivers were generally satisfied with the roles played by the National Road Safety Commission (NRSC), Motor Traffic and Transport Unit (MTTU) of the Ghana Police Service and Driver and Vehicle Licensing Authority in curbing road traffic accidents. Keywords – Ghana, Road Accidents, Road Traffic Fatalities, Causes of Road Accidents
Nsoh, S.N. & Amedorme, S.K. (2015). Perceptions of Technical and Vocational Education and Training Distance Learning students of the University of Education, Winneba, Ghana about their courses of study and face-to-face sessions. International Journal of Education and Research, 3,
Abstract
The study sought the perceptions of Technical and Vocational Education and Training Distance Learning students of the University of Education, Winneba, about the quality of their courses of study, usefulness of study materials and performance of lecturers during face-to-face sessions. The study was guided by three research questions. The sample for the study was 650 respondents. A cross-sectional survey design and a questionnaire were employed for the study. Descriptive statistical analysis was used to organise the data. The study showed that students were satisfied with the quality of their courses of study, study materials and performance of lecturers on the face-to-face sessions. The study, however, revealed that lecturers do not provide prompt feedback on students’ assignments and no reading materials are uploaded online for students to access. It is recommended that lecturers provide prompt feedback on students’ assignments and study materials should be put online for students to access. Key words: Technical education, vocational education, distance learning, face-to-face sessions,study materials, courses of study.
The study sought the perceptions of Technical and Vocational Education and Training Distance Learning students of the University of Education, Winneba, about the quality of their courses of study, usefulness of study materials and performance of lecturers during face-to-face sessions. The study was guided by three research questions. The sample for the study was 650 respondents. A cross-sectional survey design and a questionnaire were employed for the study. Descriptive statistical analysis was used to organise the data. The study showed that students were satisfied with the quality of their courses of study, study materials and performance of lecturers on the face-to-face sessions. The study, however, revealed that lecturers do not provide prompt feedback on students’ assignments and no reading materials are uploaded online for students to access. It is recommended that lecturers provide prompt feedback on students’ assignments and study materials should be put online for students to access. Key words: Technical education, vocational education, distance learning, face-to-face sessions,study materials, courses of study.
Nsoh, S.N. (2015). Assessment of the performance of reconditioned lead-acid starter batteries: The case of batteries reconditioned by local mechanics in Suame Magazine, Ghana. International Journal of Contemporary Applied Sciences, 2,
Abstract
The study assessed the performance of lead-acid starter batteries reconditioned by local mechanics at Suame Magazine, Ghana, for their abilities to be charged, start an engine and to provide adequate illumination for safe driving at night. The sample comprised of 30 batteries and 36 respondents. The survey research design was used for the study and battery tests, observation and semi-structured interview were tools used to collect data for the study. Descriptive statistics was used to discuss the results and conclusions were drawn by comparing findings of the study with typical test results as bench marks. The study established that reconditioned batteries can be charged, are able to start engines and can provide adequate illumination for safe driving at night. The results, however, showed that second-hand lead plates were used to recondition dead cells. It is recommended that government should assist the mechanics to have access to new lead plates and other equipment to enhance their work. Keywords: Assessment, Ghana, lead-acid battery, lead plates, specific gravity, Suame Magazine
The study assessed the performance of lead-acid starter batteries reconditioned by local mechanics at Suame Magazine, Ghana, for their abilities to be charged, start an engine and to provide adequate illumination for safe driving at night. The sample comprised of 30 batteries and 36 respondents. The survey research design was used for the study and battery tests, observation and semi-structured interview were tools used to collect data for the study. Descriptive statistics was used to discuss the results and conclusions were drawn by comparing findings of the study with typical test results as bench marks. The study established that reconditioned batteries can be charged, are able to start engines and can provide adequate illumination for safe driving at night. The results, however, showed that second-hand lead plates were used to recondition dead cells. It is recommended that government should assist the mechanics to have access to new lead plates and other equipment to enhance their work. Keywords: Assessment, Ghana, lead-acid battery, lead plates, specific gravity, Suame Magazine
