Compression of air creates heat; the air is warmer after compression. Expansion removes heat. If no extra heat is added, the air will be much colder after expansion. If the heat generated during compression can be stored and used during expansion, then the efficiency of the storage improves considerably. There are several ways in which a CAES system can deal with heat. Air storage can be , diabatic, , or near-isothermal.
[pdf] Automotive Energy Supply Corporation (AESC) is a manufacturer of for electric vehicles established 2007 as a joint venture between , and . Since 2018 Chinese company is a strong partner in the joint venture.
[pdf] 
