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Kongnine, Damgou Mani
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Chemistry Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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Journal : International Journal of Renewable Energy Development

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Modeling and optimization of hybrid hydro-solar-wind systems for green hydrogen production in Togo Batablinlè, Lamboni; Kongnine, Damgou Mani; Panafeïkow, Petema; Kossi, Tepe; Yendoubé, Lare; Zakaria, Djibib; Lawin, Agnidé Emmanuel; Banna, Magolmeena
International Journal of Renewable Energy Development Vol 14, No 4 (2025): July 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61136

Abstract

This study examines the feasibility and optimization of hybrid hydro-solar-wind-hydrogen energy systems in Togo, focusing on seasonal variations and energy management. Data on solar radiation, wind speed, and hydropower were obtained from meteorological stations, satellite databases, and the Nangbéto station. The results of this study show that the energy management system at the Nangbéto dam could rely on hydrogen storage and a 2.75 MW fuel cell to balance seasonal fluctuations, while a ±3 MW battery would stabilize power output. During periods of high hydropower production, surplus energy could be converted into hydrogen to ensure a continuous supply during low-flow months. The flow fluctuates seasonally, ranging from 1.5–20 m³/s in dry months to over 120 m³/s in the wet season, affecting hydrogen production (5–25 kg/day). Electrolysis efficiency remains stable (65–85%) due to optimized management. The hydro-solar-wind hybrid system converts up to 20% of hydropower into hydrogen, with peak production in August (~1,700 kg/month). Selected sites over Togo, particularly Blitta and Alédjo, show potential for hydrogen infrastructure, with Blitta yielding the most hydrogen (532.15 kg annually) and Lomé the least (482.72 kg) due to differences in solar irradiance. The study highlights the role of energy storage, hybrid integration, and policy support to enhance Togo’s hydrogen production and long-term energy stability.
Experimental investigation of inter-electrode distance and design in Cymbopogon citratus plant microbial fuel cells for sustainable energy production Attah, N'Gissa; Kongnine, Damgou Mani; Kpelou, Pali; Mouzou, Essowè
International Journal of Renewable Energy Development Vol 14, No 6 (2025): November 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61269

Abstract

Plant Microbial Fuel Cells (PMFCs) are bioelectrochemical systems that harness plant rhizodeposition to generate electricity. This technology enables electrical energy to be produced while the plant grows. However, the major problem preventing the commercialization of these cells is their low power. In the present study, a systematic investigation was conducted to ascertain the optimal configuration of these cells, with the objective of determining the optimum inter-electrode distance. In the present stidy, the lemongrass  plant (Cymbopogon citratus) was used as the main substrate source, plastic pots and graphite electrodes, while examining three single pair of electrodes configurations (PMFC-A, PMFC-B, PMFC-C), along with a unique configuration with three unaligned cathodes (PMFC-D) and three inter-electrode distances (5cm, 7.5cm and 12.5cm) were examined. The experiment focused on determining electrical parameters, plant mass growth rates and soil characteristics. These variables were measured before and after the experiment. The results indicated that the plant mass growth rate of PMFC-D exhibited the greatest magnitude (80.62%). The organic matter (OM) content in the soil exhibited an increase in each PMFC over the course of the experiment. PMFC-B exhibited the highest values of OM, electrical conductivity, and water content, respectively equal to 15.69%, 376.00µS/cm, and 15.46%. Conversely, it exhibited the lowest pH value (7.37). Electrical parameter measurements have demonstrated that PMFCs with a single pair of electrodes exhibit superior performance in comparison to those with three unaligned cathodes. Similarly, these measurements indicated that for the single pair electrode configuration, an inter-electrode distance of 7.5cm was optimal, yielding a maximum power density of 127mW/m².  The determination of the average internal resistance, open circuit voltage, and power density (PD), along with their standard deviations, demonstrated that PMFC-B exhibited superior performance. Furthermore, an analysis of its autonomy revealed that the PDmin it delivers, even in the absence of sunlight, is 16.90 mW/m². From these results, PMFC-B is the best configuration for lemongrass PMFC.
Co-Authors Attah, N'Gissa Attah, N’Gissa Banna, Magolmeena Batablinlè, Lamboni Djeteli, Gnande Kombate, Saboilliè Kossi, Tepe Kpelou, Pali Lawin, Agnidé Emmanuel Mouzou, Essowè Mouzou, Essowè Napo, Kossi Panafeïkow, Petema Yendoubé, Lare Zakaria, Djibib