An adiabatic compressed air energy storage system with non-throttling humidification and enthalpy increase

Abstract

The invention discloses a heat-insulating compressed air energy storage system achieving humidifying and enthalpy increasing in a non-throttling mode. The heat-insulating compressed air energy storage system comprises an air compressor, an air heat exchanger, a heat storage device, an air storage chamber, a feed water heater and an ejection flash evaporator. 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 air side inlet of the heat storage device through a pipeline, an air side outlet of the heat storage device is connected with an inlet of the air storage chamber through a pipeline, and an outlet of the air storage chamber is connected with a working nozzle of the ejection flash evaporator; and an ejection flash tube of the ejection flash evaporator is connected with a water source through the feed water heater, an outlet of the ejection flash evaporator is connected with an inlet of the heat storage device through a pipeline, and an outlet of the heat storage device is connected with a turbine. Based on ejection and flash principles, a mixed working medium is depressurized through the mode that compressed air is mixed with high-temperature water or vapor, throttling loss caused by a traditional throttling depressurization valve is avoided, and the output power of a system is increased.

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. 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 electric energy storage. The ...

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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 inlet temperature of the turbine will reduce the turbine power. In order to ensure the stability of the turbine power, the flow rate of the working medium must be increased accordingly, and the opening of the throttling and pressure-reducing valve must be opened to increase the turbine inlet pressure. , which will exacerbate the instability of turbine inlet working fluid parameters, and ultimately lead to instability of turbine operating conditions

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