Supercritical CO2 Brayton cycle power generation system coupled with CO2

Abstract

The invention discloses a supercritical CO2 Brayton cycle power generation system coupled with CO2. The supercritical CO2 Brayton cycle power generation system is formed by a Brayton cycle power generation unit and a CO2 energy storage unit, wherein the Brayton cycle power generation unit comprises a high temperature regenerator, a combustor, a turbine, an electric generator, a low temperature regenerator, a cooler I and a compressor I; and the CO2 energy storage unit comprises a low pressure air reservoir, a cooler II, a compressor II and a high pressure air reservoir. The CO2 energy storage unit in the power generation system can store unstable energy resources in a form of supercritical CO2, when the power demand is high, stored high temperature and high pressure supercritical CO2 stably acts to supply power through Brayton cycles, stable output of electric energy is well achieved, and thus the supercritical CO2 Brayton cycle power generation system coupled with the CO2 energy storage unit can further save energy, reduce the wind and light discharging rate, improve day and night load regulation stability and realize energy conservation and emission reduction.

Description

technical field [0001] The present invention relates to a coupling with CO 2 Supercritical CO for energy storage units 2 Brayton cycle power generation system, which belongs to supercritical CO 2 Cycle power generation technology field. Background technique [0002] The rapid economic development is inseparable from electricity. In recent years, the global electricity consumption has been continuously increasing, and the day and night load changes have increased accordingly. The wear and life reduction of some power generation and power supply units will also lead to a large amount of energy waste, so the balance adjustment of day and night loads is particularly important. At the same time, due to the use of various new energy sources such as wind power and photovoltaics, the pressure on the power grid has increased, and the direct connection of new energy to the grid will cause many problems such as voltage fluctuations and frequency deviations in the power grid, which w...

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Problems solved by technology

At the same time, due to the use of various new energy sources such as wind power and photovoltaics, the pressure on the power grid has increased, and the direct connection of new energy to the grid will cause many problems such as voltage fluctuations and frequency deviations in the power grid, which will affect the quality of power supply. As a result, the amount of curtailed wind and light has increased significantly. In fact, the network capacity is far smaller than the installed capacity of new energy. Therefore, in response to the problem of large changes in load day and night and the continuous increase in installed capacity of new energy, a new energy solution has been developed. It is imminent to set up a reasonable and feasible energy storage system

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