ENERGIASALV
Energiasalv is being developed in Paldiski to store renewable energy.
Energiasalv is a 500 MW underground battery to be built in Paldiski. When renewable energy is produced more than is consumed, Energiasalv stores renewable energy by pumping water from underground reservoirs into Paldiski Bay. If there is less wind and solar energy than consumers need, Energiasalv provides electricity to the power grid by releasing water from Paldiski Bay into underground reservoirs.
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Energiasalv provides 15 million kWh of previously stored electricity to the grid during its nominal operating cycle of 30 hours, which is more than the average daily electricity consumption of all Estonian households.
Energiasalv Zero Terrain pumped hydro energy storage technology is currently the most affordable solution for controlled electricity generation and storage in the world. Its introduction will significantly reduce the price of peak energy and thereby reduce the cost of electricity for households and businesses world's most affordable solution for controlled electricity generation and storage.
Energiasalv Paldiski follows the Green Tiger Energy Roadmap.
Energiasalv successfully fulfills the three goals of the energy trilemma
Energy security
Energiasalv provides 15 million kWh of previously stored electricity to the grid during its nominal operating cycle of 30 hours, which is more than the average daily electricity consumption of all Estonian households.
Affordable price
Energiasalv water storage technology is currently the most affordable technological solution for controlled electricity generation and storage in the world, the introduction of which will significantly reduce the electricity price of peak energy and thereby reduce the cost of electricity for households and businesses.
Minimal impact on the environment
Energiasalv's energy solutions align with environmental and social responsibilities by storing only renewable energy, thereby reducing dependence on unethical production practices and fossil fuels.
WHAT IS GNEISS?
Gneiss is a monolithic mineral in the Estonian basement found beneath sedimentary bedrock layers. It has parameters similar to granite. The crystalline basement layers are closer to the ground on the northern coast, whereas in southern Estonia, they lie deeper.
Since hydropower storage in Estonia has to be underground, approximately 38 million tons of gneiss will be extracted from the Pakri Peninsula during construction. Estonia’s road construction sector could benefit significantly from replacing traditional limestone aggregates with gneiss in road pavement.
Gneiss offers significant advantages compared to limestone as a construction material, including high abrasion- resistant, lower long-term costs, and a much smaller environmental footprint than commonly used materials such as limestone and imported granite.
WHAT IS LONG DURATION ENERGY STORAGE (LDES)?
The Paldiski Energy Storage is like an underground hydroelectric power plant, functioning as a gigantic electricity storage facility. When the wind blows and the sun shines, it can pump seawater out using this cheap electricity. When there’s no wind and the weather is cloudy, it can use turbines powered by seawater. The water storage solution is a way for Estonia to transition to 100% independent renewable energy, and in the future, it will result in lower electricity prices for consumers and a smaller carbon footprint.
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Energy storage systems can be divided into two categories: short-term and long-term.
Short-term energy storage lasts a few minutes or hours to address rapid fluctuations in the electrical grid, such as frequency regulation or covering peak loads. Batteries and accumulators are examples of systems used for such tasks.
Long-term energy storage refers to technologies that allow storage for extended periods, typically from several hours to weeks or months. This is necessary to balance long-term variations in renewable energy production, such as seasonal wind and solar energy fluctuations. The most common method for this is storing water energy using two bodies of water at different elevations, with a pump station between them.
