The underground energy storage system involves not only energy fuels (oil, natural gas, hydrogen, etc.) but also thermal or cold energy storage and electric energy storage, such as compressed air energy storage. Compared with caverns (e.g., salt caverns and rock caverns), underground energy storage in porous media occupies much larger market.
In this work, the characteristics, key scientific problems and engineering challenges of five underground large-scale energy storage technologies are discussed and summarized, including underground oil and gas storage, compressed air storage, hydrogen storage, carbon storage, and pumped storage.
The underground space for energy storage mainly includes porous or fractured porous media (e.g., depleted oil and gas reservoirs, aquifers) and caverns (e.g., salt caverns, rock caves, abandoned mines or pits) (Jannel and Torquet, 2021) (Fig. 3). The depth can range from several hundred meters to several kilometers (Kabuth et al., 2017).
2 Wuhan Institute of Geotechnical Mechanics of Chinese Academy of Sciences, Wuhan 430071, P. R. China Large-scale underground energy storage technology uses underground spaces for renewable energy storage, conversion and usage. It forms the technological basis of achieving carbon peaking and carbon neutrality goals.
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In this paper, on the base of the future development of clean and low-carbon energy, the concept and connotation of underground energy storage engineering (UESE) was …
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Types of Underground Energy Storage Several methods fall under the UES umbrella, each with its own set of characteristics and suitability based on geological conditions …
Large-scale underground energy storage technology uses underground spaces for renewable energy storage, conversion and usage. It forms the technological basis of achieving …
Underground thermal energy storage (UTES) is defined as a system that stores energy by pumping heat into underground spaces, typically utilizing water as the storage medium. It …
The government is launching a HUF 100 billion ($303 million) residential energy storage program to help families with solar panels achieve long-term energy self-sufficiency.
Underground energy storage projects involve the utilization of subterranean spaces to store energy in various forms, primarily aimed at balancing supply and demand, improving …
In China, the development of both underground gas storage in depleted natural gas reservoirs and thermal energy storage in shallow aquifers is obvious and cost-effective.
The development of underground space energy storage is a key issue to achieve carbon neutrality and upgrade China''s energy structure; (2) Global underground space energy …
As an important support technology of renewables, energy storage system is of great significance in improving the resilience of the power system. In this paper, a resilience …
What Is a Tuber in Plants? A tuber in plants refers to a specialized underground storage organ that stores nutrients and allows these plants to survive adverse conditions such …
Hydrogen energy (HE) is a promising solution for large-scale energy storage, particularly for integrating intermittent renewable energy sources into the global energy …
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