Indian scientists have suggested building pumped-hydro storage systems connected to solar plants using mines as the lower reservoir and nearby rivers as the upper reservoir. They claim that the proposed combination may reach a levelized cost of energy of $0.2693/kWh.Using idle open-cast coal mines for pumped hydropower storage of solar power is financially feasible, new research from India is suggesting. In the study "Feasibility study of solar photovoltaic/grid-connected hybrid renewable energy system with pumped storage hydropower system using abandoned open cast coal mine: A case study in India," ...Den vollständigen Artikel lesen ...