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Innovating Renewable Energy: Feasibility Study for Freetown’s Wind and Hydro Power Integration

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This project aims to assess the technical and financial aspects of integrating renewable energy sources in Freetown, focusing on a pilot wind farm of ~1.5 MW and the feasibility of scaling up to 13.5 MW wind, 2 MW solar, and 10 MWh pumped hydro storage. Utilizing SCADA for optimal energy management and reverse osmosis load modulation, this initiative seeks to enhance power capacity and electricity production while addressing hurricane preparedness and power quality challenges. Key evaluations will include wind energy density mapping and power demand data analysis to ensure reliable renewable integration.

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Innovating Renewable Energy: Feasibility Study for Freetown’s Wind and Hydro Power Integration

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  1. UN DESA Tom Hamlin Inter-Regional Adviser on Energy and Transport Division for Sustainable Development

  2. Deep penetration of renewables • Technical and Financial Assessment of Wind, Solar and Pumped Hydro Energy Storage • Pilot stage ~1.5 MW, SCADA on generation and test of Reverse Osmosis load modulation • Scale-up Full Feasibility Study ~13.5 MW wind, ~2 MW photovoltaic, 10 MWh@10 MW pumped hydro energy storage for 30% renewable power capacity, 15% renewable electricity production

  3. Freetown Wind Farm

  4. Freetown Wind Farm

  5. Pumped Seawater Hydro - Norplan

  6. Wind Atlas, Assessment, and Application Program (WAsP) Freetown

  7. WAsP Energy Density Map Crabbs

  8. WAsP results Crabbs

  9. WAsP Results Crabbs

  10. Between McNish and Quarry to North

  11. Ridge in Gap between McNish and Quarry

  12. Pumped Hydro at McNish

  13. McNishWAsP Results

  14. Pilot Phase • ~1.5 MW wind power installed • 6 or 7 midsize turbines (Vergnet or WES type) • Hurricane preparedness • 70 ton or smaller crane (on island) • Feed-in to the 11kV lines with small SCADA controlled substations/ transformers • SCADA generation upgrade with ability to modulate power consumption by reverse osmosis plants

  15. Financial Scenario for Pilot 1.5MW RETScreen

  16. Scale up Assessment • Breaking the 15% barrier • Power quality • Reducing Spinning reserve losses • Making Renewables into firm power Feasibility for scale up takes place during the GEF pilot but is an indirect project impact

  17. Single Turbine change of > 80% power -A&B Meteorological Service

  18. To avoid simultaneous power loss when scaling up to ~30% intermittent renewables ~15 MW- Diversify wind power to Crabbs, Freetown and McNish- Use wind and distributed solar PV- If still needed add Flywheel bridging power ( 20 seconds)

  19. Pumped Hydro Energy Storage

  20. APUA Power Demand Data half hours for one week

  21. WAsP results for Unison U54 at Crabbs

  22. Whole year of APUA power demand minus 30 MW base load

  23. Solar and Wind ten minutely output profiles

  24. Pumped Hydro Energy StoragePumping, Generating and State of Storage

  25. HOMER dynamics analysis

  26. Project Phase Next Steps • Site measurements correlated to GIZ data 3-6 months • EIA new sites for wind • Pilot wind project tendering process • SCADA upgrade/ RO plant modulation test • Power Purchase Agreement and Build Own Transfer (or equivalent) • Pilot Wind Demos (3 sites) • Full feasibility for post project scale up

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