High temperature underground thermal energy storage

How can a high temperature underground heat storage system be improved?

This will be achieved by conducting 6 new high temperature (~ 25°C to ~ 90°C) underground heat storage demonstration pilots and 8 case studies of existing heat storage systems with distinct configurations of heat sources, heat storage and heat utilization.

What is underground thermal energy storage?

Source TNO, inspired by IEA. Underground thermal energy storage (UTES) involves the temporary storage of thermal energy in the subsurface. When excess heat is available this is stored by heating the soil or a fluid in the subsurface and when the heat demand is high the stored heat is retrieved.

What are the main objectives of a thermal energy storage project?

The main objectives of this project are to lower the cost, reducing the risks and to optimize performance of high temperature (~25 to ~90°C) underground thermal energy storage technologies by demonstrating 6 distinct configurations of heat sources, heat storage, and heat utilization.

What is underground heat storage?

Ibrahim Dincer, Marc A. Rosen, in Exergy Analysis of Heating, Refrigerating and Air Conditioning, 2015 Underground heat storage, or underground thermal energy storage (UTES), has storing temperature range from around 0 °C to up to 40-50 °C. This operating temperature range is suitable for heating and cooling applications in HVAC.

What is thermal energy storage?

Thermal energy storage can, for example, be implemented in heating networks in the form of Underground Thermal Energy Storage (UTES) to support the use of surplus heat from industry and the implementation of renewable heat sources such as bio-Combined Heat and Power (CHP), geothermal, and solar energy.

What is underground seasonal thermal energy storage (Ustes)?

Conclusion Underground seasonal thermal energy storage (USTES) has received extensive attention all over the world with the development of renewable energy heating technology. The USTES can effectively solve the mismatch between the "source" side and the "load" side of the renewable energy heating system.