Sand Batteries

About

Sand batteries are a type of thermal energy storage technology designed to address the intermittency issues associated with renewable energy sources like solar and wind. They use sand or similar materials as the storage medium, which is heated to high temperatures using excess energy from these sources. This heat is stored for extended periods, allowing it to be used when needed, such as during colder months or when renewable energy production is low. The technology involves a closed-loop system where hot air is circulated through the sand to store and release heat. Sand batteries can provide hot water, steam, or air at temperatures up to 400°C, making them suitable for various industrial and heating applications. They offer advantages like lower costs, safety, and environmental sustainability compared to traditional battery technologies. By integrating with district heating networks, sand batteries can significantly reduce reliance on fossil fuels and help achieve carbon neutrality goals.