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All Journal Journal of Applied Engineering and Technological Science (JAETS)

Charles Kofi Kafui Sekyere

Kwame Nkrumah University of Science and Technology

Author-ID : 4302857

Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Industrial & Manufacturing Engineering

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Articles

Development of Composite Material for Wind Turbine Blades Prince Yaw Andoh; Anthony Agyei-Agyemang; Peter Oppong Tawiah; Charles Kofi Kafui Sekyere; Charles McCarthy Asante
Journal of Applied Engineering and Technological Science (JAETS) Vol. 2 No. 2 (2021): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Rapid increases in the prices of conventional turbine blade making materials as well as future sustainability issues is attracting research interest in the development of polymer composites for turbine blade applications. This study examines the suitability of using a novel bamboo fibre and recycled plastics composite developed for wind turbine blade application. Bamboo fibre was extracted from raw bamboo by chemical and mechanical processes. Recycled High Density Polyethylene (HDPE) was collected, cut into pieces, cleaned and combined with extracted bamboo fibre to form the composite. The percentage ratio of fibre content in the ten specimens ranged from 2.5% to 25%. A series of mechanical tests were conducted on the specimens, including tensile test, impact test, water absorption test and sun radiation test. Results established that as the percentage of bamboo fibre in the specimen increased, the tensile strength and impact energy also increased. Water absorption and sun radiation tests conducted on specimen X revealed no meaningful impact its mechanical properties. Hence, the most significant deduction from this study is that the specimen with 25% bamboo fibre and 75% HDPE matrix possesses the quality that qualifies it to be used as a material for wind turbine blade fabrication.

Fabrication and Testing of a Low-Cost Wind Turbine Blade using Bamboo Reinforced Recycled Plastic Prince Yaw Andoh; Charles Kofi Kafui Sekyere; Godwin Kafui Ayetor; Michael Nii Sackey
Journal of Applied Engineering and Technological Science (JAETS) Vol. 2 No. 2 (2021): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Wind energy, as a sustainable energy option is gaining research attention due to its price competitiveness relative to conventional energy sources. This study presents the fabrication and testing of a low-cost wind turbine blade using bamboo fibre with recycled plastic. Bamboo fibre was extracted from raw bamboo and combined with adequately conditioned Recycled High-Density Polyethylene (RHDPE) to form a composite which is 25% bamboo fibre and 75% RHDPE. The composite materials was then used to fabricate a turbine blade which was tested and the results compared with typical performance indices for a turbine blade made of fibre glass for comparative analysis. The turbine blades were installed at a height of 10 meters at the test site and monitored. Results showed the energy per unit cost (kWh) for the composite material was lower than that of the glass fibre with a life cycle of 107 for glass fibre and 106 cycles for the bamboo plastic. Stress and deformation analysis showed a higher value for glass fiber compared with the composite material. It can be deduced that composite material matrix possesses the desired properties and energy per unit cost ratio for consideration in building wind turbine blades.

Forecasting Electricity Demand In Ghana With The Sarima Model Prince Yaw Andoh Andoh; Charles Kofi Kafui Sekyere; L. D. Mensah; D. E.K. Dzebre
Journal of Applied Engineering and Technological Science (JAETS) Vol. 3 No. 1 (2021): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Demand forecasting is a challenging subject of interest to many organizations whose main focus is to improve their steady growing customer request/demand, and help in increasing their revenue generation. The story is no different in the power industry. It is quite difficult for power or electrical producers to store high quantum of the energy produced, hence this poses a challenge in estimating precisely the quantum of electrical energy in order to equate demand and supply of powers as well as reducing or eliminating the rising transmission losses. This study explores potential time series models in electricity demand prediction or forecasting for the Western Regions of Ghana. Secondary data was sourced formally from the regional headquarters of ECG to aid in research design to be able to estimate the quantum of electricity needed by consumers in the region. This was done using time series data analysis toolpak software. Results show that the models formulated are viable for future consumption forecasts and other investment in alternative power source projects in meeting these future demands. Since there are up-surging energy demand patterns in the region, the flexibility of the formulated models can be very useful and supplementary to framing effective and efficient energy policies.

Investigating The Failure of Leaf Springs in Automobile Suspension on Ghana Road Prince Yaw Andoh Andoh; L D Mensah; D E K Dzebre; Kofi Owura Amoabeng; Charles Kofi Kafui Sekyere
Journal of Applied Engineering and Technological Science (JAETS) Vol. 4 No. 1 (2022): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

This study investigates the failure of leaf springs used in the suspension system of heavy-duty vehicles in Ghana. Primary and secondary data were collected using both open and closed-ended questionnaires. Welders and fabricators of Sarkyoyo enterprise at the Suame Spare parts dealership area in Kumasi were engaged in the survey. The elastic strain and stress mathematical models were used to determine the stress points in a loaded leaf spring with the aid of ANSYS. The factors considered in the analysis were the leaf spring SAE design specification, the recommended Ghana Highway Authority load limit for heavy-duty vehicles, and the terrain. Analysis was done for both the standard and variable curvature leaf springs. The mode of failure was found to be fatigue loading. The causes of failure were determined to be loaded beyond the recommended 43 tons per wheel limit, bad roads, and reckless driving. It was also observed that loading causes the edges of the leaf spring to bend outwardly from the top, making the edges more prone to failure. Results further showed that the leaf spring with variable curvature recorded strain energy 2.5 times higher than the standards leaf spring.

Performance Analysis of a Mechanical System To Break and Separate Palm Nut-Fibre Cake Prince Yaw Andoh Andoh; Kofi Owura Amoabeng; Charles Kofi Kafui Sekyere; D E K Dzebre
Journal of Applied Engineering and Technological Science (JAETS) Vol. 4 No. 1 (2022): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

This research seeks to test the performance of a palm nut-fibre cake breaker and separator machine to alleviate the problem of hand separation by local oil producers. It takes into consideration the standard cylindrical shape of a palm nut-fibre cake. The machine operated on an electric motor of 2.2 kW at 1420 rpm. The average throughput capacity of the machine was 107.72 kg/hr with the capacity weight of 120 kg. Test results indicated a separation efficiency of 92%. Also, cost estimation indicated that the annual savings in using the machine with less labour than manual labour entirely was $466. The study outcome is relevant to small-scale producers on the need to utilize a cost-effective machine to facilitate a high separation yield of nuts and fibres from the cake obtained from processing palm oil and improve the production output of palm kernel oil processed from the nuts.

Co-Authors Anthony Agyei-Agyemang Charles McCarthy Asante D E K Dzebre D. E.K. Dzebre Godwin Kafui Ayetor Kofi Owura Amoabeng L D Mensah L. D. Mensah Michael Nii Sackey Peter Oppong Tawiah Prince Yaw Andoh Prince Yaw Andoh Andoh

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