Papers by Author: I.A. Adejumobi

Abstract: This paper presented the qualitative assessment of transformer insulating oil. The breakdown voltage, dielectric and acidity tests were electrically and chemically carried out on sixteen samples of transformer insulating oil collected from various serving distribution transformers in Ilorin Metropolis in Nigeria, through the supply authority. The adequacy of the obtained results was determined by comparing experimental values with America Society for Testing and British Standard (BTA4705) pre-requisites. About seventy five percent (75%) of the tested samples failed at least one of the tests, indicating inadequacy in the routine checks. Economic impacts of the obtained results and major causes and prevention of insulation oil degradation were also presented.

Abstract: This paper is a survey and analytical work on the discovered potential hydropower sites in Nigeria by the authors. Hydrological data of dams and rivers have been collected from various locations in Nigeria. Mathematical model for energy conversion process to determine the plant generating capacities of the identified sites were developed. A computer program in Q- Basic has also been developed for fast analysis and accuracy. Simulations were done on the collected data. From the obtained results, about thirty-two potential sites have been have discovered suitable to generate between 16kW and 700kW electric power. Appropriate turbine types were suggested.