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Samuel Oliver Effiom
University of Cross River State
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Feasibility of floating solar photovoltaic systems (FSPVs) development in Nigeria: an economic cost appraisal case study Samuel Oliver Effiom
Applied Engineering and Technology Vol 2, No 2 (2023): August 2023
Publisher : ASCEE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/aet.v2i2.1012

Abstract

This study focused on evaluating the economic cost viability of developing a floating solar photovoltaic systems (FSPVs) project in Nigeria, using Ikang river, Bakassi as an incident study. The FSPVs was designed using the HOMER software to satisfy full load requirements of 2426.45 kWh/day, while appraising the viability of the FSPVs in incident study. Meteorological data of the incident study location which include geographical coordinates, ambient temperature, and global horizontal irradiance were used to select a suitable FSPVs design for the cost appraisal. Lifecycle cost model was further developed to evaluate the proposed FSPVs at different project development phases. These include: predevelopment and consenting (PC), procurement and acquisition (PA), installation and commissioning (IC), operation and maintenance (OM), and decommissioning and disposal (DD). The results obtained showed that the net present cost, Levelized cost of energy, and operating cost of the project were 10,350,933.25USD, 0.90USD/kWh, and 179,164.73USD, respectively. Also, the capital expenditure (CAPEX) amassed by 81.53% of the entire project cost, while operating expenditure (OPEX) was 18.47%. Furthermore, installation, support systems, predevelopment and project management, contingencies, indirect cost, and electrical equipment were the key drivers of the project. For the lifecycle stages; PC, PA, IC, OM and DD were obtained to be 12%, 57.9%, 11.6%, 9.96%, and 8% respectively of the project cost. Thus, the incident study location has the potential for FSPVs development and has proven to be economically viable. Nevertheless, established model was suitable in appraising preliminary variations in FSPVs.
Numerical and Experimental Investigation of a Vortex Head for Back-Pressure Suppression in Petroleum Pumping Systems Samuel Oliver Effiom; Maria Kaka Etete Enoh; Godwin Effiong Willie; Precious-Chibuzo Effiom
Scientific Journal of Engineering Research Vol. 2 No. 2 (2026): June
Publisher : PT. Teknologi Futuristik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64539/sjer.v2i2.2026.422

Abstract

Back-pressure accumulation and transient pressure surges remain critical operational challenges in petroleum pumping systems, particularly during high-rate product transfer into storage tanks. Conventional mitigation strategies such as pressure relief valves, surge vessels, and bypass lines are largely reactive, energy-intensive, and maintenance-dependent. Despite advances in computational fluid dynamics (CFD), limited research has addressed passive inlet-based hydrodynamic conditioning for petroleum storage tanks with full-scale industrial validation. This study presents a combined numerical and experimental investigation of a passive vortex head (VH) designed to suppress back pressure through vortex-induced flow redistribution at the tank inlet. Three-dimensional CFD simulations were performed using ANSYS Fluent with the realizable k–ε turbulence model to analyze pressure distribution, velocity fields, turbulence characteristics, and vortex formation. Controlled experimental validation was conducted using a prototype system under normalized inlet pressure conditions (0.07 bar) in an industrial petroleum storage facility. The results demonstrate that the vortex head induces a stable swirling flow that promotes gradual momentum dissipation and reduces localized pressure buildup near full capacity. Compared with a conventional straight inlet configuration, the vortex head reduced peak back pressure by approximately 20–30%, while decreasing total tank filling time by about 15% under identical flow conditions. CFD predictions agreed with experimental measurements within ±5%. The findings establish passive vortex-based inlet conditioning as a practical, energy-efficient strategy for preventive back-pressure suppression in petroleum storage infrastructure.
Co-Authors Godwin Effiong Willie Maria Kaka Etete Enoh Precious-Chibuzo Effiom