Coal mine emptying energy storage solution

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 is coal underground space electrochemical energy storage?

CUEES concept and technical requirements Coal Underground space Electrochemical Energy Storage (CUEES) makes full use of the underground space of coal mining to store or release electrical energy (various types of batteries) through reversible chemical reactions, so as to achieve efficient use of electrical energy, as shown in Fig. 20 [ 94 ].

Can coal mining space be used for electrochemical energy storage?

The use of coal mining space for electrochemical energy storage has not yet been commercialized [ 95 ], and four key problems still need to be broken through, namely, site safety evaluation of underground space for coal development, construction of electrochemical energy storage geological bodies.

Could underground gravity energy storage repurpose old mines?

An international team of scientists recently proposed another innovative and resourceful solution that involves repurposing old mines: Underground Gravity Energy Storage (UGES). They outlined the idea in the journal Energies. UGES involves lowering large amounts of sand stored in containers attached to a central cable down a deep underground shaft.

How safe is underground electrochemical energy storage in coal mines?

Because underground electrochemical energy storage in coal mines needs to be equipped with a large number of batteries, it requires laying a large number of wires, which may lead to fires, so CUEES needs to be equipped with a complete and effective safety monitoring and protection system during operation to ensure safe operation. 6.2.

Why is the underground space of a coal mine important?

This is because the underground space of a coal mine has the following advantages: (1) Rich space: the underground coal mine has a vast space, especially underground cavities such as goafs and abandoned roadways, which can be used to store a large amount of energy.