Buried energy storage

What is deep underground energy storage?

Deep underground energy storage is the use of deep underground spaces for large-scale energy storage, which is an important way to provide a stable supply of clean energy, enable a strategic petroleum reserve, and promote the peak shaving of natural gas.

Are underground reservoirs suitable for large-scale energy storage?

The underground reservoirs for large scale energy storage are described. An extensive review of the criteria for site screening underground reservoirs is done. Large-scale underground energy storage technologies and reservoir types are matched. General criteria to all reservoir types are assessed.

Are underground thermal energy storage systems sustainable?

The study aims to explore the potential of Underground Thermal Energy Storage (UTES) systems, including Aquifer Thermal Energy Storage (ATES) and Borehole Thermal Energy Storage (BTES), as sustainable solutions for managing energy supply and demand.

How to choose a site for underground energy storage?

The site selection for underground energy storage is dependent upon several factors, mainly related to geological and engineering issues, such as: the type of candidate rocks, structural issues, tectonics and seismicity issues, hydrogeological and geothermal issues and also geotechnical criteria.

What is underground thermal energy storage (SHS)?

SHS can be developed at a small-scale (<10 MW) above surface technology or at a large-scale system in the subsurface. Underground Thermal Energy Storage (UTES) is a form of energy storage that provides large-scale seasonal storage of cold and heat in underground reservoirs [ 74, 75, 76, 77 ].

Why do we need deep underground energy storage caverns?

Ensuring the long-term function of deep underground energy storage Due to the long service life and the flammable and explosive energy storage medium, ensuring the long-term functions (i.e., availability, sealing, stability, and safety) of energy storage caverns are a prerequisite for the implementation of deep underground energy storage.