Effects of Introducing a Pumped Storage Hydroelectric Facility on Energy System Emissions in Gran Canaria

Abstract

TheChira–Soria Pumped Hydroelectric EnergyStorage (PHES) project in Gran Canaria represents a pioneering approach to energy storage in isolated island power systems. This installation stores surplus renewable electricity by transferring water toan elevated reservoir, later releasing it to generate power during peak demand periods [1]. The initiative aims to achieve a notable reduction in greenhouse gas emissions, with estimated daily cuts of 1,432.98 tons of CO₂ equivalent and annual reductions reaching 523,038.12 tons—equivalent to a 23.32% decrease in total emissions. The PHES system is expected to enable a sharp increase in renewable energy penetration, from 20.6% in 2021 to 75.9% by 2030 using current technologies and potentially approaching full renewable integration with future developments. This evolution represents a key milestone toward achieving a sustainable and resilient energy framework for GranCanaria. Furthermore [2], the project will enhance grid flexibility, overcoming the constraints of existing fossil-based technologies in accommodating variable renewable inputs. By reinforcing grid stability and reliability, theChira–Soria PHES could serve as a reference model for other isolated energy systems pursuing decarbonization and large-scale renewable integration [3].