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Title: Water cycle driven only by wind energy surplus: Towards 100% renewable energy islands
Authors: Melián Martel, Noemí 
Del Río Gamero, Beatriz 
Schallenberg Rodríguez, Julieta Cristina 
UNESCO Clasification: 332205 Fuentes no convencionales de energía
3308 Ingeniería y tecnología del medio ambiente
Keywords: Renewable energy
Energy-water nexus
100% RES
Wind energy surplus, et al
Issue Date: 2021
Project: Investigación e innovación hacia la Excelencia en Eficiencia tecnológica, uso de Energías renovables, tecnologías Emergentes y Economía circular en la DESalación 
Plataforma Macaronésica para el incremento de la excelencia en materia de I+D en desalación de agua y del conocimiento del nexo agua desalada-energía 
Journal: Desalination (Amsterdam) 
Abstract: This paper studies how to increase the share of renewable energy by using solely stand-alone renewable energies to drive the water cycle. A case study is undertaken of El Hierro (Canary Islands, Spain), an island already on the path to becoming a 100% renewable energy island thanks principally to a wind-hydro power plant that covered around 60% of the annual electricity demand in 2018. The island's water cycle includes groundwater extraction, seawater desalination and water pumping and distribution, representing altogether around 35% of the annual electricity demand of the island. The idea is to investigate the possibility of driving the entire water cycle solely with the wind energy surplus. For this purpose, two scenarios are considered and developed: one based on the existing decentralised water cycle, and the second on an alternative centralised one, with just one modular reverse osmosis desalination plant and a centralised water storage system. The aim is to establish which model adapts best to an intermittent energy source such as wind energy without conventional backup systems. Results show that both scenarios lead to an increase in the overall renewable energy contribution in the island. Moreover, the centralised water model, specially due to its centralised water storage system, allows a higher contribution from renewable energy sources, increasing their overall annual penetration.
ISSN: 0011-9164
DOI: 10.1016/j.desal.2021.115216
Source: Desalination (Amsterdam) [ISSN 0011-9164], v. 515, 115216, (Noviembre 2021)
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