Liquid air energy storage device for cold energy self-compensation of regenerator

Abstract

The invention provides a liquid air energy storage device for cold energy self-compensation of a regenerator. The liquid air energy storage device for cold energy self-compensation of the regenerator comprises an energy storage unit, a first-stage regenerator, a second-stage regenerator and an energy release unit, wherein the energy storage unit comprises a compression heat storage and utilization device, a first-stage liquefaction heat exchanger and a second-stage liquefaction heat exchanger which are sequentially connected in series; and the energy release unit comprises an air turbine unit, a second-stage rewarming heat exchanger, a first-stage rewarming heat exchanger and a compression heat storage and utilization device, the second-stage rewarming heat exchanger, the first-stage rewarming heat exchanger and the compression heat storage and utilization device are sequentially connected in series, an inlet of the air turbine unit is connected with an air outlet of the compression heat storage and utilization device, and an outlet of the air turbine unit is connected with the first-stage rewarming heat exchanger through a compensation pipeline. According to the liquid air energy storage device for cold energy self-compensation of the regenerator, cold energy compensation is provided for the first-stage regenerator through low-temperature exhaust of the air turbine unit, and the cold storage efficiency of the first-stage regenerator and the second-stage regenerator is improved, so that the energy storage efficiency of the liquid air energy storage device is improved, and meanwhile, the operation economical efficiency of the liquid air energy storage device is improved.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a liquid air energy storage device with cold energy self-compensation of a regenerator. Background technique [0002] In recent years, the global energy storage industry has developed rapidly, covering the scale of the global energy storage market on the new energy generation side, grid side and user side, and is growing at a rate of 9% per year, much higher than the 2.5% growth rate of global electricity. . Especially in the field of renewable energy, the rapid development of renewable energy represented by wind and light has brought huge research and development space for large-scale energy storage technology. However, due to the inherent intermittency and instability of renewable energy, the problem of curtailment of wind and light still seriously restricts the large-scale grid connection and safe and stable operation of renewable energy. [0003] Liquid air energy st...

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Problems solved by technology

[0006] The invention provides a liquid air energy storage device with self-compensation for the cold energy of the regenerator, which is used to solve the defect of low energy storage efficiency due to the cold leakage loss of the regenerator in the liquid air energy storage device in the prior art, and realize the protection of the regenerator. Cold energy compensation to improve the efficiency of liquid air energy storage

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