Patent ID: 11892234
Assignee: INSTITUTE OF ENGINEERING THERMOPHYSICS, CHINESE ACADEMY OF SCIENCES
Field: Chemical engineering (Chemistry)
Classification: CPC F  Y | IPC F

Claim 15:
16. The method according to claim 15, wherein the converting input gaseous air into liquid air by the supercritical liquefaction subsystem comprises:
driving the multistage compressor by the electric motor to perform a multistage compression of the input air to form supercritical air, enabling the supercritical air at an outlet of the multistage compressor to enter the proportional adjustment device to be split into two split branches of supercritical air flow, wherein one of the split branches of supercritical air to enter the supercritical flow passage in the liquefaction cold box of the staged cryogenic storage subsystem, and then to pass through the liquid expanding device for expansion and the gas-liquid separator for separation to form the liquid air, and then enabling the liquid air to enter the cryogenic insulation tank through a liquid-side outlet of the gas-liquid separator,
wherein the converting liquid air into gaseous air by the evaporation and expansion subsystem comprises:
passing and evaporating the liquid air output from the cryogenic insulation tank through the cryopump and the supercritical flow passage in the evaporation cold box of the staged cryogenic storage subsystem to form the supercritical air, and enabling the supercritical air formed by evaporation to enter the multistage expander to do work and drive the electric generator to generate electricity,
wherein storing the heated heat storage working medium in a heat storage tank and returning the cooled heat storage working medium to a room temperature tank by a heat storage and heat exchange subsystem comprises:
storing the heat storage working medium heated by compression heat in various heat regenerators into the heat storage tank;
allowing heat storage working medium in various reheaters to heat-exchange with the supercritical air to cool, allowing the heat storage working medium at liquid-side outlets of various reheaters to further absorb heat energy of the heat storage working medium by a residual heat utilization device and output cryogenic energy close to the room temperature, and returning the cooled heat storage working medium to the room temperature tank.