A research article reports the results of original research, assesses its contribution to the body of knowledge in a given area, and is published in a peer-reviewed scholarly journal. Research publications through published and on-going articles/researches are captured in this community http://197.159.135.214/jspui/handle/123456789/1 2026-09-18T23:58:22Z 2026-09-18T23:58:22Z Osei, Janet Appiah Adamou, Rabani Kabo-Bah, Amos T. Narra, Satyanarayana http://197.159.135.214/jspui/handle/123456789/1372 2026-09-18T13:21:27Z 2024-10-18T00:00:00Z

Decarbonisation in the Transport Sector of Ghana Using Autogas Osei, Janet Appiah; Adamou, Rabani; Kabo-Bah, Amos T.; Narra, Satyanarayana Decarbonisation is instrumental in attaining sustainable mobility. To actualize the Ghana Nationally Determined Contribution (NDC) set emission reduction target of 15% relative to Business-As-Usual (BAU) scenario by 2030, sustainable should be actions transport transport, sustainable encouraged. Thus, encouraged. Thus, promoting the use of romoting Liquified Petroleum Gas (LPG) and Lthe use ofiquified Petroleum Gas (LPG) Compressed Natural Gas Candompressed Natural Gas (CNG) in automobiles is very crucial to ensure efficient and green mobility. Nonetheless, existing policies in Ghana overlook autogas (LPG/CNG) as prospective decarbonizing solution in the transport sector. The study employed survey analysis and analytical modeling approach to elicit the benign effects of autogas in the in automobiles is very crucial to ensure efficient and green mobility. Nonetheless, existing policies in Ghana overlook autogas (LPG/CNG) as prospective decarbonizing solution in the transport sector. The study employed survey analysis and analytical modeling approach to elicit the benign effects of autogas in the transport sector using using Accra as a case study. The ecological, economic and study. The ecological, economic and social dimensions of autogas were expatiated to extrapolate effective measures to facilitate their smooth implementation. Survey was dimensions of autogas were expatiated to extrapolate effective measures to facilitate their smooth implementation. Survey was central business district of Accra to attain the percentage of autogas and gasoline used by taxis operators for the first time per author's knowledge. A carried out in the thepercentage of autogas and gasoline used by taxis operators for the first time per author’s knowledge. A selected and data was drivers 500 taxi of purposive sample and data was analysis conducted using R statistical package. From the survey, 14% of taxis were powered with LPG whilst 86% were gasoline, however, the LPG-powered taxis were retrofitted gasoline engine vehicles. The analytical model was based on physics principles involving three resistance forces- aerodynamic, rolling resistance and inertia. CO2 emission savings of 29% and 18.4% were elicited from the use of CNG and LPG relative to gasoline fuel at the end of the simulation using the ambient conditions in Accra. Thus, use of autogas will limit global warming impact and aid the country to fulfill its pledged emission target by 2030. The government is entreated to regulate autogas use in the transport sector and increase its patronage by promoting flexible policies like meager custom duty on imported CNG/LPG vehicles Rstatistical package. From the survey, 14% of taxis were powered with LPG whilst 86% were gasoline, however, the LPG-powered taxis were retrofitted gasoline engine vehicles. The analytical model was based on physics principles involving three resistance forces- aerodynamic, rolling resistance and inertia. CO2 emission savings of 29% and 18.4% were elicited from the use of CNG and LPG relative to gasoline fuel at the end of the simulation using the ambient conditions in Accra. Thus, use of autogas will limit global warming impact and aid the country to fulfill its pledged emission target by 2030. The government is entreated to regulate autogas use in the transport sector and increase its patronage by promoting flexible policies like meager custom duty on imported CNG/LPG vehicles as well as tax credits. A Publication submitted to the West African Science Service Centre on Climate Change and Adapted Land Use and the Université Abdou Moumouni, Niger in partial fulfillment of the requirements for the degree of Master of Science Degree in Climate Change and Energy

2024-10-18T00:00:00Z Osei, Janet Appiah Adamou, Rabani Kabo-Bah, Amos T. Narra, Satyanarayana Kakou, Konin Pierre-Claver http://197.159.135.214/jspui/handle/123456789/1371 2026-09-18T13:14:25Z 2026-02-12T00:00:00Z

Estimation of rainfall and wind impacts on fuel consumption of passenger vehicles: A physical model approach Osei, Janet Appiah; Adamou, Rabani; Kabo-Bah, Amos T.; Narra, Satyanarayana; Kakou, Konin Pierre-Claver With the continuous changes in climate, increased attention is required to address the adverse impacts of climatic variables on automobile fuel consumption and emissions. In recent studies, various prediction models have been employed to quantify the influence of weather-related factors on vehicular fuel consumption. The paper introduces three interrelated vehicle-based physical models designed to quantify the effects of rainfall and wind speed/direction on fuel consumption of four commercial vehicles - Matiz, Astra, Pregio, and Urvan, utilizing monthly weather data from Accra. The results indicated that the presence of headwind and rainfall substantially increased fuel consumption, whereas tailwind contributed to a reduction. Fuel increments under rainfall and headwind ranged from 2 % to 10 % and 4 % to 16 %, respectively across the vehicles, depending on the monthly variation in weather intensity. Conversely, the reduction in fuel consumption due to tailwind ranged between 1 % and 3 %, insufficient to counteract the more significant increases induced by headwind. The combined impact of rainfall and wind increased fuel consumption by 10 % to 37 % relative to the effect of rainfall alone and by 5 % to 66 % compared to headwind effects, depending on monthly intensity levels. The proposed models demonstrated robust performance in analyzing weather-induced fuel consumption and can be effectively applied to estimate offline vehicular fuel usage prior to a journey. A Publication submitted to the West African Science Service Centre on Climate Change and Adapted Land Use and the Université Abdou Moumouni, Niger in partial fulfillment of the requirements for the degree of Master of Science Degree in Climate Change and Energy

2026-02-12T00:00:00Z Halarou, Hamza Abarchi Moumouni, Yacouba Bonkaney, Abdou Latif Abdoulaye, Moussa Falmata Amadou, Oumarou Fati Madougou, Saidou http://197.159.135.214/jspui/handle/123456789/1370 2026-09-18T12:56:04Z 2026-01-15T00:00:00Z

A Full AC Time‐Series Analysis of Photovoltaic Hosting Capacity in Niger's Grid Halarou, Hamza Abarchi; Moumouni, Yacouba; Bonkaney, Abdou Latif; Abdoulaye, Moussa Falmata; Amadou, Oumarou Fati; Madougou, Saidou The integration of solar photovoltaic (PV) systems into sub‐Saharan African distribution grids presents a transformative opportunity to enhance energy access and sustainability. However, accurately quantifying the hosting capacity (HC), the maximum PV power that can be accommodated without violating operational limits, remains a major challenge under variable generation and demand. This paper presents a full alternating current (AC) time‐series analysis of PV HC in Niger's River‐Zone (RZ) distribution grid using hourly resolution over a full year. The methodology applies α‐scanning to determine the maximum admissible PV scaling factor (αmax), constrained by voltage and thermal limits. Detailed grid modeling in Pandapower is coupled with dynamic voltage regulation through multi‐step capacitor bank control to capture the benefits of reactive power support. Results showed that HC was a highly time‐dependent metric, with significant intra‐ and inter‐day variability shaped by PV availability, load patterns, and grid conditions. The voltage remained within regulatory bounds (0.9–1.05 p.u), and all thermal constraints were met, thus validating the control strategy. Daily HC values frequently approached or surpassed the available PV generation potential, suggesting that the network retained additional margin for further PV integration under existing operating conditions. The calculated penetration ratio reached up to 50% with minimal intraday variability, indicating consistent alignment between PV output and load demand throughout daylight hours. This dynamic framework offers critical insights for planning high‐renewable penetration in weak grids. It supports informed investment decisions and provides a replicable, data‐driven approach for PV integration across emerging economies. A Publication submitted to the West African Science Service Centre on Climate Change and Adapted Land Use and the Université Abdou Moumouni, Niger in partial fulfillment of the requirements for the degree of Master of Science Degree in Climate Change and Energy

2026-01-15T00:00:00Z Hamza, Abarchi Halarou Moumouni, Yacouba Abdou Latif, Bonkaney Benigni, Andrea Saidou, Madougou http://197.159.135.214/jspui/handle/123456789/1369 2026-09-18T12:11:49Z 2025-09-30T00:00:00Z

Analyzing voltage stability challenges under high photovoltaic penetration in Niger’ s electrical grid Hamza, Abarchi Halarou; Moumouni, Yacouba; Abdou Latif, Bonkaney; Benigni, Andrea; Saidou, Madougou The integration of solar photovoltaic (PV) power plants into the electricity grid offers a sustainable solution to meet rising energy demand, particularly in regions with abundant solar resources like Niger. However, high PV penetration introduces challenges to grid stability, including voltage fluctuations, increased power losses, and line overloading. This study investigates the impact of substantial PV integration on the voltage stability of the Nigerien River Zone (RZ) grid, which accounts for approximately 68% of the country’s total energy consumption. Using quasi-dynamic simulations, the study examines grid performance across three selected months, viz., January, May, and August, to capture both daily and seasonal variations in demand and PV generation. Results reveal that periods characterized by peak demand and diminished PV output exhibited the most pronounced grid stress, with significant voltage deviations, increased power losses, and marked changes in the Voltage Stability Index (VSI). In August, frequent cloud cover leads to intermittent PV generation and increased variability, whereas May demonstrates relatively stable conditions during early afternoon hours. Key challenges include voltage instability during high demand, persistent overloading of major transmission lines, and heightened power loss linked to renewable variability. Recommendations include targeted interventions such as grid reinforcements, advanced reactive power support, energy storage systems deployment, and demand-side management strategies to enhance grid reliability. This study provides novel insights into the dual challenges of high demand and renewable variability, offering practical guidance to support Niger’s transition to sustainable and resilient energy system. A publication submitted to the West African Science Service Centre on Climate Change and Adapted Land Use and the Université Abdou Moumouni, Niger in partial fulfillment of the requirements for the degree of Master of Science Degree in Climate Change and Energy

2025-09-30T00:00:00Z