What is an underground energy storage project

What are the different types of energy storage technologies?

The technologies considered in this article are: Underground Gas Storage (UGS), Underground Hydrogen Storage (UHS), Compressed Air Energy Storage (CAES), Underground Pumped Hydro Storage (UPHS) and Underground Thermal Energy Storage (UTES).

Is underground storage a viable green solution?

Underground storage for renewable energy resources could be a viable green solution as we transition to a net zero UK. Some renewable energy sources, like wind power, are intermittent and any excess energy can be difficult to store. BGS © UKRI.

What is underground gas storage?

There is a need to study the gas mixtures underground for storage. The concept of underground gas storage is based on the natural capacity of geological formations such as aquifers, depleted oil and gas reservoirs, and salt caverns to store gases.

Can underground energy storage systems be mined?

On one hand, during construction or operation of underground energy storage systems, water inflow could be so great that mining or operation would be impossible. On the other hand, in arid regions or within the unsaturated zone, absence of both capillary water and water at hydrostatic head may prevent storage within a mined cavern.

What is underground storage system?

Thus, the underground storage system can either be used to: (i) inject and withdraw H 2 /NG gases stored underground for transportation or internal use purposes, or (ii) capture CO 2 and store it permanently with no withdrawal process.

What are the different types of underground energy storage technologies?

For these different types of underground energy storage technologies there are several suitable geological reservoirs, namely: depleted hydrocarbon reservoirs, porous aquifers, salt formations, engineered rock caverns in host rocks and abandoned mines.