The Menorca Waste and Energy Consortium, the driving force behind the "Feasibility study to determine the development strategy and implementation of a global electricity generation project", unveiled the results of the work carried out in recent months in a presentation by Rubén Diego Carrera, the CEO of INGECID, the company engaged to provide technical consultancy services.
The feasibility study is intended to determine the strategy for developing and implementing a global project to generate power from different potential sources: wind, solar and biogas with an eye on both the medium and long terms.
Rubén Diego explained: "Our goal is to provide the Consortium with quality information that will support its strategic decision-making concerning a potential project to improve/expand the existing Es Milá wind farm, as well as the possibility of adding a solar farm on an adjacent site, specifically the location of the Milá 1 and Milá 2 landfills, where an organic waste recovery plant with biogas is also planned for the future."
The site under study is located to the north of Mahón. The Es Milá wind farm is currently in operation, with four 800 kW wind turbines. Next to the wind farm there is a landfill site for municipal solid waste and a composting plant for waste recovery.
The power generated by the wind farm is currently evacuated at medium voltage, causing grid saturation issues.
The project under study involves repowering the wind farm, building a photovoltaic solar plant and constructing a power evacuation line.
General image of the presentation. SOURCE: INGECID
With regard to the repowering of the Es Milá wind farm, two scenarios are being considered, involving replacing the current wind turbines with two different capacities and technological solutions. The first consists of installing two wind turbines of 2MW each. The second is the installation of two wind turbines of 3MW each.
Two alternative scenarios, with different installed capacities, are also being studied for the photovoltaic solar facility. One option is to install 20,550 polycrystalline solar modules of 330 Wp per unit at the Milá 1 and Milá 2 landfills. The other option is to install just 11,058 solar panels on the Milá 1 landfill only. This site has already been fully sealed and is available for use.
Whichever scenario is adopted, a new evacuation line will be needed as the current infrastructure does not have the capacity needed. Three options are being examined, all of them underground: a 6.4-kilometer evacuation line to the current Dragonera electrical substation (REE); a 5.2-kilometer line to ENDESA’s private substation in the port of Mahón, or a 3.7-kilometre line to a newly built substation on a free site that is currently owned by the Menorca Island Council.
This means a total of 12 scenarios are being analyzed. The feasibility analysis includes calculating the Net Present Value (NPV), Internal Rate of Return (IRR) and Payback Period for each alternative over 30 years at a discount rate of 4%.
The options were ranked based on this analysis. The best option involves installing two 3MW wind turbines and 20,550 solar modules with an evacuation line to the ENDESA substation, generating an NPV of €2,429,195.47 over 30 years and an IRR of 5.33%, with payback in 15.7 years. La mejor opción encontrada implica la instalación de 2 aerogeneradores de 3MW, 20.550 módulos solares, con la línea de evacuación hasta las instalaciones de Endesa; obteniéndose un VAN de 2.429.195,47 € (a 30 años), una TIR del 5,33% y un PAYBACK de 15,7 años.
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