Steam heat supplementing and air energy storage peak regulation system and method

Abstract

The invention discloses a steam heat supplementing and air energy storage peak regulation system and method. The system is composed of a compressor, an air cooler, a gas and liquid conversion device,a liquid air storage tank, a heater, an expansion machine, a turbine unit, a condenser and a control valve. A running method of the system comprises an energy storage mode and an energy releasing mode, the energy releasing mode further comprises two work modes, under the energy storage mode, the generating capacity of the turbine unit is consumed to drive the compressor to compress air, online loads of a coal-fired unit are reduced, under the energy releasing mode, a series or parallel manner can be selected, steam is used for heating low-temperature air to push the expansion machine to generate electricity, the online loads of the coal-fired unit can be improved, the compressor is low in work temperature, and little in unit power consumption, in the heat supplementing process, latent heatand part sensible heat of unit steam are sufficiently used, the gradient use of the steam is achieved, and the unit power generation coal consumption can be reduced.

Description

technical field [0001] The invention belongs to the technical field of energy storage peak regulation, and specifically relates to a steam heating air energy storage peak regulation system and method, which is suitable for various thermal power plants with coal-fired units as typical, and can improve the comprehensive utilization of steam of coal-fired units efficiency while increasing the flexibility of coal-fired units. Background technique [0002] At present, my country's wind energy, solar energy and other renewable energy sources are developing rapidly year by year. In addition, the electricity consumption of the whole society is increasing year by year, and the peak-to-valley difference in power consumption of the power grid is increasing. [0003] At present, the technologies to improve the peak-shaving capability of coal-fired units mainly include electric boiler heat storage technology, water tank heat storage technology, steam turbine steam process transformation ...

AI Technical Summary

Problems solved by technology

[0003] At present, the technologies to improve the peak-shaving capability of coal-fired units mainly include electric boiler heat storage technology, water tank heat storage technology, steam turbine steam process transformation technology, electrochemical battery energy storage technology, etc. Electric boiler heat storage technology is to convert electric energy into heat energy. It is used for heating and has strong peak-shaving ability, but the energy quality is greatly reduced, and it is only suitable for cogeneration units. Water tank heat storage technology and steam turbine steam process transformation technology have better thermal economy and relatively low investment, but the peak-shaving ability is limited. , and is only applicable to combined heat and power units. Electrochemical battery energy storage technology has fast response, small size, and short construction period, but has short life, high average cost, and high safety risk. Whether it is suitable for large-scale energy storage implementation still needs engineering demonstration verification

Images