peter kamtu | University of Jos (original) (raw)

Papers by peter kamtu

Mechanical Engineering Research, 2013

Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria whe... more Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria when waste vegetable matter, organic waste and some industrial waste are fermented in the absence of oxygen. This study was conducted to find the effect of cow dung variety on biogas generation. Some samples of fresh cow dung (2 Kg for each breed of cow) of cows which were not exposed to treatment with anti-biotics for some weeks, were collected from Sobere Farms and mixed with water in ratio of 1:1 volume and the mixture was loaded into a bio-reactor to ferment. The Hydraulic Retention Time (HRT) was 9 to 14 days. The reduction in retention time was achieved by adding human excreta and urine into the digester to increase micro-organism and pathogenic activities. The biogas obtained after 11 days was gathered and analyzed in a 250-Gas Chromatograph and Integrator. The results showed the percentages and calculated energies (calorific values) of biogas from the cow dung of four (4) selected v...

The finite element analysis of spherical indentation was conducted using the SolidWorks simulatio... more The finite element analysis of spherical indentation was conducted using the SolidWorks simulation software. The relationship between the load and indention was determined, and comparison with the Hertzian solution was made. In this study, spherical indenters of diameter 5, 10 and 15 mm were used to assess the effect of indenter radius on indentation response at a specified load. The outcome of our study shows that the resulting load-indentation response does not closely correlate; as a result, a difference of 21.2% was observed between the hertz solution and simulated results. The increase in diameter was observed to be associated with the corresponding decrease in indentation depth and the indentation stress. The von Mises stress contour at maximum load was analysed and was observed to be the highest on the indented surface beneath the indenter. The resultant displacement contour shows a uniform displacement distribution.

Global Journal of Engineering and Technology Advances

The demand for bio-lubricant is constantly on the increase due to rapid depletion of world fossil... more The demand for bio-lubricant is constantly on the increase due to rapid depletion of world fossil fuel reserves, technological advancement, concern for environmental pollution and its potential to address the energy and environmental problems. This research evaluated the tribological properties of copper (II) oxide nanoparticle-enriched bio-lubricant developed from sandbox (Hura crepitans) seed oil. Copper (II) oxide nanoparticle was added to improve the tribological properties of the bio-lubricant. The experimental parameters were set up according to central composite design of response surface methodology to minimize the numbers of experiments. The bio-lubricants containing varying proportions of copper (II) oxide nanoparticle additive were prepared and their tribological properties were evaluated using ball-on-disc tribometer. The values of parameters used to assess the tribological behaviors were: load (2 N, 5 N, 8 N), speed (150 rpm, 200 rpm, 250 rpm) and nanoparticle concentra...

Journal of mechanical engineering research, 2013

Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria whe... more Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria when waste vegetable matter, organic waste and some industrial waste are fermented in the absence of oxygen. This study was conducted to find the effect of cow dung variety on biogas generation. Some samples of fresh cow dung (2 Kg for each breed of cow) of cows which were not exposed to treatment with antibiotics for some weeks, were collected from Sobere Farms and mixed with water in ratio of 1:1 volume and the mixture was loaded into a bio-reactor to ferment. The Hydraulic Retention Time (HRT) was 9 to 14 days. The reduction in retention time was achieved by adding human excreta and urine into the digester to increase microorganism and pathogenic activities. The biogas obtained after 11 days was gathered and analyzed in a 250-Gas Chromatograph and Integrator. The results showed the percentages and calculated energies (calorific values) of biogas from the cow dung of four (4) selected var...

FUOYE Journal of Engineering and Technology

Investigation on the effect of mesh density on the analysis of simple support bracket was conduct... more Investigation on the effect of mesh density on the analysis of simple support bracket was conducted using Finite element analysis simulation. Multiple analyses were carried out with mesh refinement from coarse mesh of 3.5 mm to a high-quality fine mesh with element size of 0.35 mm under 15 kN loading. Controlled mesh analysis was also conducted for the same loading. At the mesh size of 0.35 mm, it has a maximum stress value of 42.7 MPa. As the element size was reduced, it was observed that below 1.5 mm (higher mesh density) there was no significant increase in the peak stress value; the stress at this level increased by 0.028 % only. Further decreased of mesh size shows insignificant effect on the stresses and displacements for the high-quality fine mesh analysis. The application of High-quality mesh control analysis showed a significant reduction in the computation time by more than 90%. Regardless of the reduction in computation time, the controlled mesh analysis achieved more tha...

Mechanical Engineering Research, 2013

Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria whe... more Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria when waste vegetable matter, organic waste and some industrial waste are fermented in the absence of oxygen. This study was conducted to find the effect of cow dung variety on biogas generation. Some samples of fresh cow dung (2 Kg for each breed of cow) of cows which were not exposed to treatment with anti-biotics for some weeks, were collected from Sobere Farms and mixed with water in ratio of 1:1 volume and the mixture was loaded into a bio-reactor to ferment. The Hydraulic Retention Time (HRT) was 9 to 14 days. The reduction in retention time was achieved by adding human excreta and urine into the digester to increase micro-organism and pathogenic activities. The biogas obtained after 11 days was gathered and analyzed in a 250-Gas Chromatograph and Integrator. The results showed the percentages and calculated energies (calorific values) of biogas from the cow dung of four (4) selected v...

The finite element analysis of spherical indentation was conducted using the SolidWorks simulatio... more The finite element analysis of spherical indentation was conducted using the SolidWorks simulation software. The relationship between the load and indention was determined, and comparison with the Hertzian solution was made. In this study, spherical indenters of diameter 5, 10 and 15 mm were used to assess the effect of indenter radius on indentation response at a specified load. The outcome of our study shows that the resulting load-indentation response does not closely correlate; as a result, a difference of 21.2% was observed between the hertz solution and simulated results. The increase in diameter was observed to be associated with the corresponding decrease in indentation depth and the indentation stress. The von Mises stress contour at maximum load was analysed and was observed to be the highest on the indented surface beneath the indenter. The resultant displacement contour shows a uniform displacement distribution.

Global Journal of Engineering and Technology Advances

The demand for bio-lubricant is constantly on the increase due to rapid depletion of world fossil... more The demand for bio-lubricant is constantly on the increase due to rapid depletion of world fossil fuel reserves, technological advancement, concern for environmental pollution and its potential to address the energy and environmental problems. This research evaluated the tribological properties of copper (II) oxide nanoparticle-enriched bio-lubricant developed from sandbox (Hura crepitans) seed oil. Copper (II) oxide nanoparticle was added to improve the tribological properties of the bio-lubricant. The experimental parameters were set up according to central composite design of response surface methodology to minimize the numbers of experiments. The bio-lubricants containing varying proportions of copper (II) oxide nanoparticle additive were prepared and their tribological properties were evaluated using ball-on-disc tribometer. The values of parameters used to assess the tribological behaviors were: load (2 N, 5 N, 8 N), speed (150 rpm, 200 rpm, 250 rpm) and nanoparticle concentra...

Journal of mechanical engineering research, 2013

Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria whe... more Biogas is a renewable, alternative and sustainable form of energy from the action of bacteria when waste vegetable matter, organic waste and some industrial waste are fermented in the absence of oxygen. This study was conducted to find the effect of cow dung variety on biogas generation. Some samples of fresh cow dung (2 Kg for each breed of cow) of cows which were not exposed to treatment with antibiotics for some weeks, were collected from Sobere Farms and mixed with water in ratio of 1:1 volume and the mixture was loaded into a bio-reactor to ferment. The Hydraulic Retention Time (HRT) was 9 to 14 days. The reduction in retention time was achieved by adding human excreta and urine into the digester to increase microorganism and pathogenic activities. The biogas obtained after 11 days was gathered and analyzed in a 250-Gas Chromatograph and Integrator. The results showed the percentages and calculated energies (calorific values) of biogas from the cow dung of four (4) selected var...

FUOYE Journal of Engineering and Technology

Investigation on the effect of mesh density on the analysis of simple support bracket was conduct... more Investigation on the effect of mesh density on the analysis of simple support bracket was conducted using Finite element analysis simulation. Multiple analyses were carried out with mesh refinement from coarse mesh of 3.5 mm to a high-quality fine mesh with element size of 0.35 mm under 15 kN loading. Controlled mesh analysis was also conducted for the same loading. At the mesh size of 0.35 mm, it has a maximum stress value of 42.7 MPa. As the element size was reduced, it was observed that below 1.5 mm (higher mesh density) there was no significant increase in the peak stress value; the stress at this level increased by 0.028 % only. Further decreased of mesh size shows insignificant effect on the stresses and displacements for the high-quality fine mesh analysis. The application of High-quality mesh control analysis showed a significant reduction in the computation time by more than 90%. Regardless of the reduction in computation time, the controlled mesh analysis achieved more tha...