The invention discloses a
compressed air energy-storage device based on constant-
temperature control. The
compressed air energy-storage device comprises a
liquid piston, a low-pressure
gas pipeline, a high-pressure
gas pipeline, a liquid cooling device, a water pump
water turbine unit, a temperature sensor, a first water circulating cooling device, a second water circulating cooling device and a controller. The
liquid piston, the low-pressure
gas pipeline, the high-pressure gas pipeline and the water pump
water turbine unit are arranged, so that air is compressed and expanded in the
liquid piston,
potential energy of
compressed air is utilized completely, loss is reduced, and a
utilization rate for
stored energy is high; the temperature sensor,
liquid storage plates, a plurality of
layers of fillers and the liquid cooling device are arranged, so that the temperature in the liquid
piston can be regulated in an
air compression process and an air expansion process, and therefore, damages, caused by fierce temperature variation, on equipment are prevented, and safety is high; and the rotatable
liquid storage plates are arranged, so that
liquid storage is carried out when the temperature is high, and gas-liquid heat exchange is realized; and the rotatable liquid storage plates are perpendicular when the temperature is uniform, so that liquid is not stored, degree of
automation is high, and gas-liquid heat exchange effect is good.