The difference between geothermal and compressed air energy storage

How does geothermal energy affect pressure and air distribution?

Comparative roles of geothermal energy on pressure and air distribution, the rising air production temperature heating by a high-temperature aquifer is more pronounced. In addition, the energy performance results show that the geothermal energy supplement is remarkable, even result in energy recovery from wellhead larger than the injection energy.

What are the advantages of compressed air energy storage?

Advantages of Compressed Air Energy Storage (CAES) CAES technology has several advantages over other energy storage systems. Firstly, it has a high storage capacity and can store energy for long periods. Secondly, it is a clean technology that doesn't emit pollutants or greenhouse gases during energy generation.

How should CAES & geothermal systems be combined?

Operation of injection and production should be appropriately designed due to larger pressure variation for CAESA. The smooth temperature change in aquifers indicates that CAES and geothermal systems can be combined to determine optimal injection temperature and achieve the best energy efficiency. CAESA can be influenced by reservoir properties.

What is energy geo-storage?

In this context, energy geo-storage provides various alternatives, the use of which depends on the quality of surplus energy. In terms of power and energy capacity, large mechanical energy storage systems such as Compressed Air Energy Storage (CAES) and Pumped Hydro Storage (PHS) are cost-effective and suitable for centralized power generation.

What is the efficiency of a compressed air based energy storage system?

CAES efficiency depends on various factors, such as the size of the system, location, and method of compression. Typically, the efficiency of a CAES system is around 60-70%, which means that 30-40% of the energy is lost during the compression and generation process. What is the main disadvantage of compressed air-based energy storage?

Can pumped hydroelectric storage and compressed air energy storage be combined?

Currently, both pumped hydroelectric storage (PHS) and compressed air energy storage (CAES) have been applied commercially for large-scale energy storage technologies. Especially, CAES can be combined flexibly with small and large-scale power applications [ 4, 5 ].