Rock cave compressed air energy storage strength

Does a lined rock cavern contain a weak interlayer during blasting?

To evaluate the stability of a lined rock cavern (LRC) for compressed air energy storage (CAES) containing a weak interlayer during blasting in the adjacent cavern, a newly excavated tunnel-type LRC was taken as the research object.

Can sediment voids be used for compressed air energy storage?

Compressed air energy storage (CAES) salt caverns are suitable for large-scale and long-time storage of compressed air in support of electrical energy production and are an important component for realizing renewable energy systems. In this paper, the use of sediment voids in highly impure rock salt formations for CAES is proposed.

How much energy can a cavern store?

Thus, over a 24 h period, we can store about 2000 W per meter drift. However, note that our analysis is focused on air tightness and energy balance of the underground cavern, whereas additional energy transfer will also occur during the compression and cooling of the air at the ground surface facility.

What is compressed air energy storage (CAES)?

Compressed air energy storage (CAES) is a large-scale energy storage technique that has become more popular in recent years.

What is a good compressive strength for a rock cavern?

Previous studies indicate that ∼30 m thick rock formations, with a compressive strength of 69–138 MPa and a conductivity of less than 2.0 × 10 −8 m/s at a depth of 395–579 m, are desirable for rock caverns . Temperature changes are also expected during the compression and decompression cycle.

Can underground caverns reduce air leakage during decompression?

We carried out coupled thermodynamic, multiphase fluid flow and heat transport analysis. ► Coupled behavior associated with underground lined caverns for CAES was investigated. ► Air leakage could be reduced by controlling the permeability of concrete lining. ► Heat loss during compression would be gained back at subsequent decompression phase.