The invention relates to a liquefied
compressed air energy storage system with cold-storage liquid media. The liquefied
compressed air energy storage system comprises compressor systems, a
cold storage system, a heat storage system, a liquefying system and a
turbine power generation system. During
energy storage, the
multistage compressor system is driven by
renewable energy sources, so that
compressed air is supercharged to exchange heat with a room-temperature cold-storage
liquid medium, the cold quantity stored in the
liquid medium is lowered to liquefying temperature, and the compressed air is liquefied through throttling; during energy releasing, the
liquid air is supercharged to exchange heat with a high-temperature cold-storage
liquid medium, the medium recycles cold energy to give to the liquefying process, and the air is warmed to be vaporized; room-temperature high-pressure air is input into a multi-stage
turbine expander for acting, and a power generator is driven to output
electric energy; the heat storage system reduces the
power consumption of the next stage of compressor, and the stored heat is heated step by step before expansion to raise the intake
air temperature; a cold-storage medium with a low
freezing point and a high / low
boiling point recycles the cold energy of the
liquid air, the
specific heat capacity of the liquid media is large, and the large-temperature-span heat exchange is realized. The liquefied
compressed air energy storage system has the advantages of being simple in structure and stable in performance, can realize integration of energy storage and power generation, and can realize the large-scale grid-connection of
renewable energy generation, therefore improving the capacity of a
power grid accepting
new energy power generation.