Wind power-generating low-temperature energy accumulation system and energy accumulation and power supply method

Abstract

The invention relates to a wind power-generating low-temperature energy accumulation system and an energy accumulation and power supply method and belongs to the technical field of energy resources. The wind power-generating low-temperature energy accumulation system comprises a wind power generator (1), an air compressor unit (2), an air separator unit (3), a liquid air storage tank (4), a liquid air pressure pump (5), a third-stage air heat exchanger unit (6), water heat accumulation equipment (7), an electric heater (8), a solid heat accumulator (9), a high-pressure turbine (10), a low-pressure turbine (11) and an energy accumulation power generator unit (12), wherein the air separator unit (3) comprises a high-pressure expansion machine (13), a first-stage heat exchanger (14), a second-stage heat exchanger (15) and a throttling valve (16). The wind power-generating low-temperature energy accumulation system is characterized in that energy is accumulated by utilizing low-temperature compressed air and is released at the electricity consumption peak to generate power; and meanwhile, higher-grade energy is obtained through liquid and solid heat accumulation to improve the power generation efficiency of the power generator. The wind power-generating low-temperature energy accumulation system has the benefits that the energy density is large, the energy utilization ratio is high, no limitation of geographical conditions exists, and the peak-avoiding power generation is realized.

Description

technical field [0001] The invention relates to a low-temperature energy storage system for wind power generation with high energy density, which is not limited by geographical conditions, and an energy storage and power supply method, belonging to the technical field of energy. Background of the invention [0002] With the development of the national economy in recent years, my country's demand for power resources is also increasing. Among the power plants that have been completed and put into operation, the installed capacity of thermal power plants accounts for more than 70%. Since thermal power plants mainly use non-renewable fossil fuels such as coal, oil, and natural gas as energy sources in the process of generating electricity, a large amount of pollutants and greenhouse gases are inevitably produced during the production process. It is against this background that renewable energy has developed. Compared with other energy sources, existing renewable energy source...

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Problems solved by technology

[0003] However, for most renewable energy sources such as wind energy, due to the temporal and seasonal fluctuations of the energy itself, it is sensitive to external conditions such as weather, and the power provided by itself It is not very stable, and the city's electricity consumption is not a constant process, so the peak of power generation may not coincide with the peak of electricity consumption, resulting in a great waste of energy

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