The invention discloses an efficient high-pressure
liquid air energy storage / release
system, which comprises an
energy storage subsystem and an energy release subsystem; in the
energy storage subsystem, a low-pressure compressor set (1'), a high-pressure compressor set (1), a cold accumulator (2), a low-temperature
heat exchanger (3), a high-pressure low-temperature
storage tank (4), a low-temperature expansion
machine set (6) and a low-temperature
heat exchanger (3) are communicated in sequence; a driving unit (9) drives the high-pressure compressor set (1), and the low-temperature expansion
machine set (6) drives the low-pressure compressor set (1'); the energy release subsystem comprises a self-pressurization unit (5) and an acting unit; and the high-pressure and low-temperature
storage tank (4), the cold accumulator (2), a heat accumulator /
heat exchanger (7) and a main expansion
machine set (8) are connected in sequence, and the main expansion machine set (8) drives a power generator (24). The energy storage
system disclosed by the invention has the advantages of
high energy density, high efficiency, no
power consumption in the power generation stage, suitability for various power stations, no
greenhouse gas generation, capability of recovering intermediate-temperature and low-temperature
waste heat and the like.