Compressed air energy storage( CAES) is one of the potential large-scale energy storage technologies. However,its application is restricted because of the disadvantage of low energy density and large storage volume. Liquid air energy storage( LAES) technology is a new CAES technology,which can improve the energy density obviously. So on the principle of air liquefaction,it described a liquid air energy storage system,the air was liquefied and stored with high pressure. Cold energy was recovered through thro...