Underground thermal energy storage

Underground thermal energy storage (UTES) involves storing excess heat or cold in shallow underground formations, like aquifers or boreholes, for later use. During periods of low energy demand or surplus renewable energy, heat or cold is injected underground. When needed, this stored energy is extracted to provide heating or cooling for buildings or industrial processes. This method helps balance energy supply and demand, enhances renewable energy utilization, and reduces reliance on fossil fuels. It is efficient, sustainable, and leverages the earth's naturally stable temperature to store thermal energy over days, months, or even seasons.