تقييم نظام الضخ والتخزين الكهرومائي باستخدام مياه البحر في ليبيا: دراسة حالة مصراتة

Abstract

Libya’s power sector suffers from structural deficiencies, notably a heavy reliance on fossil-fuel generation and chronic grid instability, which significantly hinder both economic and social development. In this context, the present study explores the potential of Seawater Pumped Hydroelectric Storage (SW-PHS) as a strategic solution to enhance national energy security and improve grid reliability. A case study was conducted at the Misurata site (Dakheel Cave), where the techno-economic and environmental feasibility of the project was assessed through detailed engineering calculations of storage capacity and installed power. This was complemented by an economic evaluation using Net Present Value (NPV), Internal Rate of Return (IRR), and Levelized Cost of Energy (LCOE), alongside a sensitivity analysis of electricity prices and capital expenditures.

The results indicate that the system can deliver a storage capacity of approximately 12.6 GWh with an installed power of 1,574 MW, achieving an NPV of around $2.45 billion, an IRR of 18.5%, and a low LCOE of $0.045/kWh—thus confirming its economic viability. Furthermore, the environmental assessment suggests that the system could prevent nearly 3.7 million tons of CO₂ emissions annually compared to diesel-based generation. These findings underscore the strong technical, economic, and environmental merits of the proposed SW-PHS project. The study recommends conducting detailed geological surveys and establishing enabling regulatory frameworks to attract private investment.Key words: Seawater Pumped Hydroelectric Storage (SW-PHS), Energy Security, Grid Stability, Techno-economic Feasibility, Net Present Value (NPV), CO₂ Emissions Reduction, Renewable Energy in Libya.