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Once a net importer of energy, Uruguay now exports its surplus energy to neighbouring Brazil and Argentina. In less than two decades, Uruguay broke free of its dependence on oil imports and carbon emitting power generation, transitioning to renewable energy that is owned by the state but with infrastructure paid for by private investment.
In 2005, Uruguay initiated a dramatic shift in its energy strategy, moving from petroleum-based electricity generation to renewable sources. In 2024, Uruguay generated 99 percent of its electricity from renewable sources using hydropower (42 percent), wind (28 percent), and biomass (26 percent).
To this day, Uruguay continues to rely heavily on its dams, including the imposing Salto Grande on the Río Uruguay, whose power is shared with Argentina, and several on the Río Negro. For decades, electricity from those dams and from generators running on gas and oil imported largely from Argentina and Brazil met Uruguayans’ energy needs.
Uruguay receives an average 1,700 KW per square meter of sunlight a year, on par with Mediterranean countries although solar represents only a fraction of the country’s total electricity production. Uruguay’s Investment Promotion Law offers incentives for investing in solar manufacturing, systems implementation, and solar energy utilization.
ESB has officially opened a major battery plant at its Poolbeg site in Dublin, which will store excess renewable energy for discharge when needed. It said the facility will add 75MW of fast-acting energy storage to help provide grid stability.
Ireland inaugurated the country’s ‘largest’ grid-scale battery energy storage facility, located in Poolbeg Energy Hub. The 75 MW/150 MWh BESS is aimed at enhancing grid stability and facilitating greater integration of renewable energy into Ireland's power network.
The Dublin Energy Hub, housing the largest battery, serves as a testbed for the future of clean energy in Ireland. It is envisioned as a hub for integrating various green technologies, including offshore wind, hydrogen, and carbon capture and storage, all working together to power a sustainable future for the Emerald Isle.
This might be when demand is high or when capacity from wind or solar is low – for instance, during a low pressure period in winter. Ireland has about 800MW of storage capacity, while the policy framework recommends procuring additional storage immediately. Ultimately, this will provide cheaper, green electricity to the consumer.
Compressed-air-energy storage (CAES) is a way to store energy for later use using compressed air. At a utility scale, energy generated during periods of low demand can be released during peak load periods. The first utility-scale CAES project was in the Huntorf power plant in Elsfleth, Germany, and is still operational as of 2024.
Compressed air energy storage may be stored in undersea caves in Northern Ireland. In order to achieve a near- thermodynamically-reversible process so that most of the energy is saved in the system and can be retrieved, and losses are kept negligible, a near-reversible isothermal process or an isentropic process is desired.
New compressed air energy storage concept improves the profitability of existing simple cycle, combined cycle, wind energy, and landfill gas power plants. In: Proceedings of ASME Turbo Expo 2004: Power for Land, Sea, and Air; 2004 Jun 14–17; Vienna, Austria. ASME; 2004. p. 103–10. F. He, Y. Xu, X. Zhang, C. Liu, H. Chen
A study numerically simulated an adiabatic compressed air energy storage system using packed bed thermal energy storage. The efficiency of the simulated system under continuous operation was calculated to be between 70.5% and 71%.
