Deep well 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.

Can a deep geothermal exploration well be used for borehole thermal energy storage?

Brown CS, Kolo I, Falcone G, Banks D. Repurposing a deep geothermal exploration well for borehole thermal energy storage: implications from statistical modelling and sensitivity analysis. Appl Therm Eng. 2023;220: 119701.

What is medium deep borehole heat exchanger?

The storage of heat via medium deep borehole heat exchangers is a new approach in the field of Borehole Thermal Energy Storage. In contrast to conventional borehole storages, fewer, but deeper borehole heat exchangers tap into the subsurface, which serves as the storage medium.

How is thermal energy stored in boreholes?

The storage of thermal energy in boreholes is accomplished by using vertical heat exchangers buried anywhere from 20 to 300 m below the earth's surface. This facilitates the flow of heat energy into and out of the ground (clay, rock, sand, etc.) .

Where is shallow geothermal energy stored?

Shallow geothermal energy is stored in the Earth's uppermost layers, up to a few hundred meters deep, and can be extracted using a geothermal heat exchanger or ground source heat pump (GSHP). The heat exchanger paced 1 to 2 m below the surface from the shallow geothermal energy.

Can onshore wells be used as deep borehole heat exchangers?

Nibbs W, Brown CS, Kolo I, Watson S, Falcone G: Repurposing onshore wells for geothermal use in the united kingdom: application as deep borehole heat exchangers. In: World Geothermal Congress 2023