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This study focuses on optimizing photovoltaic (PV) water pumping systems adapted to the climatic and hydrogeological conditions of the Ferlo region in Senegal—a vast sylvopastoral zone characterized by abundant solar resources (4,000–5,500 kWh/m2/year) and groundwater availability from the Maastrichtian aquifer. In a national context marked by heavy dependence on imported fossil fuels and low rural electrification, the research aims to identify the most efficient and economically viable system configuration for sustainable water access. Six PV system configurations were analyzed, including direct coupling, fixed-voltage DC–DC conversion, Linear Current Booster (LCB), Maximum Power Point Tracker (MPPT) with or without battery storage, hybrid MPPT + LCB, and DC–DC–AC MPPT with inverter. The methodology integrates PV electrical modeling based on the single-diode equivalent circuit, solar radiation assessment accounting for geographic and meteorological factors, and hydraulic design considering a total dynamic head of 76.2 m including head losses. Results indicate comparable energy requirements across systems (≈ 285–300 kWh/day) for installed capacities of 70–74 kW and 175–184 PV modules. However, significant variations appear in performance and cost. The direct coupling configuration achieves the highest efficiency (46.8%) with the lowest water cost (15 CFA/m3) and an initial investment of 23,231,250 CFA, while the most complex DC–DC–AC MPPT system shows reduced efficiency (38%) and a higher water cost of 40 CFA/m3 for an investment of 32,531,250 CFA. These findings highlight the importance of balancing technical performance and economic feasibility in PV pumping system design for rural water supply in Senegal.

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Sizing of a Photovoltaic Pumping System in the Ferlo Area According to the Coupling Type

  • 会议论文

  • 发表日期：

    2026年

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  • Dalla Camara,
  • Cheikh Saliou Touré,
  • Senghane Mbodji

摘要

This study focuses on optimizing photovoltaic (PV) water pumping systems adapted to the climatic and hydrogeological conditions of the Ferlo region in Senegal—a vast sylvopastoral zone characterized by abundant solar resources (4,000–5,500 kWh/m2/year) and groundwater availability from the Maastrichtian aquifer. In a national context marked by heavy dependence on imported fossil fuels and low rural electrification, the research aims to identify the most efficient and economically viable system configuration for sustainable water access. Six PV system configurations were analyzed, including direct coupling, fixed-voltage DC–DC conversion, Linear Current Booster (LCB), Maximum Power Point Tracker (MPPT) with or without battery storage, hybrid MPPT + LCB, and DC–DC–AC MPPT with inverter. The methodology integrates PV electrical modeling based on the single-diode equivalent circuit, solar radiation assessment accounting for geographic and meteorological factors, and hydraulic design considering a total dynamic head of 76.2 m including head losses. Results indicate comparable energy requirements across systems (≈ 285–300 kWh/day) for installed capacities of 70–74 kW and 175–184 PV modules. However, significant variations appear in performance and cost. The direct coupling configuration achieves the highest efficiency (46.8%) with the lowest water cost (15 CFA/m3) and an initial investment of 23,231,250 CFA, while the most complex DC–DC–AC MPPT system shows reduced efficiency (38%) and a higher water cost of 40 CFA/m3 for an investment of 32,531,250 CFA. These findings highlight the importance of balancing technical performance and economic feasibility in PV pumping system design for rural water supply in Senegal.