Abandoned underground space energy storage

Can underground space energy storage technology be used in abandoned coal mines?

The underground space resources of abandoned coal mines in China are quite abundant, and the research and development of underground space energy storage technology in coal mines have many benefits.

What are the patterns of energy storage in abandoned mines?

The patterns of energy storage in underground space of abandoned mines include mainly pumped hydro storage (PHS) and compressed air energy storage (CAES) [, , , ].

Can abandoned underground space be used for energy storage?

While the energy storage capacity of abandoned underground space with volume of 9 billion m 3 can reach 51660 GWh each day using IBCAES at a depth of 500 m. The problem of intermittency and instability of renewable energy generation can be well solved as long as 2.32 % of abandoned underground space can be used for energy storage.

What are the advantages of underground energy storage?

The underground area of the coal mine has reached about 400 km2, which can accommodate a large number of energy storage equipment and storage media. (2) High utilization rate of underground space: underground energy storage can use underground space, does not occupy surface space, and will not cause too much impact on land use.

Is underground space energy storage a promising energy storage technology?

In summary, we believe that among the existing energy storage technologies, underground space energy storage has become one of the most promising energy storage technologies in the future because it can achieve large-scale economic and stable storage of energy.

Why do abandoned mines have subterranean space?

A significant quantity of subterranean space, including underground roadways and tunnels connected to them, has developed in abandoned mines as a result of the ongoing exploitation of coal resources. In China, the concept of “secondary development” is not strong in abandoned mines.