In the quest for sustainable water access in developing regions, a groundbreaking approach to photovoltaic water pumping systems (PVWPS) has emerged, promising not only to enhance water supply but also to revolutionize maintenance practices in the field. Conducted by a team led by Ange Sahuquet from Université Paris-Saclay, this innovative method utilizes the very photovoltaic modules that power the systems to conduct essential pumping tests.
Traditionally, these tests have relied on diesel pumps, often performed only during the installation phase. This limitation can lead to unforeseen complications as borehole conditions evolve over the 20-year lifespan of PVWPS. Sahuquet emphasizes the importance of ongoing monitoring, stating, “Our method allows for regular testing without the logistical burden of transporting diesel generators, ensuring that the borehole remains viable for sustainable water extraction.”
The new technique not only simplifies the testing process but also significantly reduces costs and emissions. A photovoltaic pumping test costs a mere $43, a stark contrast to the $511 required for a multiple step drawdown test or the hefty $2050 for a long pumping test. This cost efficiency opens new avenues for local authorities, NGOs, and companies involved in water management, making long-term sustainability more accessible.
The research was applied in a village in Burkina Faso, where a PVWPS equipped with 750 Wp of photovoltaic modules and a 10 m³ water tank demonstrated the effectiveness of this method. The results were impressive, achieving an average model fit of 0.99, which indicates a high level of accuracy in determining borehole parameters. This precision is crucial for preventing premature replacements of PVWPS components, ultimately leading to significant savings over time.
Sahuquet’s work highlights a critical intersection of energy and water management, underscoring the energy-water nexus in developing countries. “By integrating renewable energy solutions with water management, we are not just enhancing water access; we are fostering a more sustainable future,” he explains. This approach could reshape how water pumping systems are monitored and maintained across various regions, potentially influencing policy and investment in renewable energy technologies.
The implications of this research extend far beyond Burkina Faso, presenting a transferable model for other regions facing similar challenges. As the water, sanitation, and drainage sector increasingly seeks innovative solutions to ensure sustainability, Sahuquet’s findings, published in ‘Heliyon’ (translated as ‘Helium’), may serve as a catalyst for change. The integration of photovoltaic technology into routine maintenance practices could redefine operational standards, paving the way for a more resilient and sustainable approach to water management in the years to come.
