An Adiabatic Compressed Air Energy Storage System with Non-throttle Humidification and Enthalpy Elimination of Residual Heat

Abstract

The invention discloses an adiabatic compressed air energy storage system capable of realizing non-throttling humidification, enthalpy increasing and residual heat elimination. The system comprises an air compressor, an air heat exchanger, a heat storage device, an air storage chamber, supplied water heaters and an ejecting flash vessel; an outlet of the air compressor is connected with an inlet of the air heat exchanger through a pipeline; an outlet of the air heat exchanger is connected with an inlet on the air side of the heat storage device through a pipeline; an outlet on the air side of the heat storage device is connected with an inlet of the air storage chamber through a pipeline; an outlet of the air storage chamber is connected with a working nozzle of the ejecting flash vessel; an ejecting flash pipe of the ejecting flash vessel is connected with a water source through the inside of the heat storage device; the supplied water heaters are arranged on the pipeline between the ejecting flash vessel and the heat storage device or the pipeline between the heat storage device and the water source; and an outlet of the ejecting flash vessel is connected with a turbine. The system is based on the ejecting and flashing principles, the heat exchange coefficient of water is larger than that of air, the heat exchange efficiency of the heat storage device is increased, the residual heat of the heat storage device is eliminated, the work efficiency of the system is increased, and continuous and stable operation of the system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to an adiabatic compressed air energy storage system for non-throttling humidification and enthalpy increase to eliminate residual heat. Background technique [0002] At present, the demand for electricity continues to grow, and the share of renewable energy power generation is increasing year by year. Due to the inherent intermittent shortcomings of renewable energy and the increasing difference between peak and valley power consumption on the user side, these problems make the power grid peak shaving problem It is very prominent that the development of energy storage technology can effectively stabilize the peak and valley fluctuations of power grid load. [0003] Compressed air energy storage power station has the advantages of high energy storage efficiency and low cost per unit energy storage power, and is one of the technical means suitable for large-scale ele...

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Problems solved by technology

The superposition of the two factors will eventually lead to a significant decrease in the temperature of the compressed air at the turbine inlet, a large throttling loss, and a significant decrease in the working capacity of the working medium.

And the lowering of the turbine inlet temperature will reduce the turbine power. In order to ensure the stability of the turbine power, the flow rate of working medium must be increased accordingly, and the opening of the throttling and pressure-reducing valve shall be opened to increase the inlet pressure of the turbine. , which will aggravate the instability of turbine inlet working fluid parameters, and ultimately lead to instability of turbine operating conditions; in addition, the heat storage device in each energy storage / energy release cycle in the traditional scheme cannot completely release the heat storage process The heat of compression, resulting in a significant decline in the heat storage capacity and system efficiency of the heat storage device after multiple cycles

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