Engineering Journal: Volume-10, Issue-3, March, 2024

Abstract— This research is on design of and fabrication of a single barrel pig launcher. A 14 inches diameter pipe was used for the main launcher barrel and a 10 inches diameter pipe used for the minor barrel. These parts were joined by welding processes. Components such as signaler, vent, drainer, pressure gauge, eccentric reducer, etc, were welded alongside the pipe. The launcher was designed to withstand fluid pressure of 200bar and also accommodate a single pig during launching operation. Solid cast pig was employed and launcher designed to suit the upstream oil industries where it would find application for cleaning, inspection and monitoring of pipelines.

Abstract— This research is on solar water heater. An active solar heating system requires an external source of drive such as pump or electric motor. The main source of energy for this system is solar energy from the sun. It is cost free to heat the water and transfer heat to the fluid in the collector. The collector surface area is less than 1m2 and sourced locally. At moderate weather condition the collector temperature might be as high as 760C at ambient temperature of 250C. Improvement in thermal efficiency of the system based on the techniques to improve upon convective heat transfer. This is achieved by Insertion of twisted aluminum tapes and its geometry on the periphery of the fluid tube aided the effectiveness of heat transfer. The overall thermal efficiency of the system was 26.34%.

Abstract— In a previous research work, attempt was made to improve upon the productivity of the syringe plant of First Medical & Sterile Product, Port Harcourt, Nigeria, by using time and motion study. The innate requirement for quality assurance and integrity of the manufactured products medically when put to use sensitize the consciousness of the researchers to delve into the design and rupture mechanism of the syringe barrel. Two design models were proposed. These are cylindrical barrel with flat ends and cylindrical barrel with hemispherical ends. Stress and force analysis projected the cylindrical barrel with flat ends as more suitable design on the basis of crack propagation, bursting or mode of failure by rupture. For the cylindrical barrel, force equilibrium to prevent bursting in transverse direction was confirmed to be 5.4711N while force equilibrium to stop bursting in the longitudinal direction was 89.01N. The force equilibrium was established on the basis of equality of the stress force and pressure force of the enclosed fluid.
The results of cylindrical barrel with hemispherical ends was catastrophic in the sense that equilibrium of stresses and forces to avoid crack propagation or busting could only hold in the longitudinal direction. So to say that, equilibrium of stresses and forces failed in transverse directions, resulting in longitudinal rupture or bursting of the cylinder. The numerical values of the stress force and fluid pressure force being 99.95N and 94.48N respectively.
To this end the design and rupture mechanism of the syringe barrel of First Medical & Sterile Product had been established with cylindrical barrel having flat ends being the approved design. .