A gas-sand energy storage power station

Abstract

An air-sand energy storage power station is composed of an upper sand storage reservoir (35), a lower sand storage reservoir (33), a generator (34), a transmission unit and a sand discharge pipeline (32). The upper sand storage (35) is located at the top of the gas-sand storage power station, and the lower sand storage (33) is located at the bottom of the gas-sand storage power station; the generator (34) is installed on the upper sand storage (35) and the lower sand storage between libraries (33). The transmission unit is located on one side of the gas-sand energy storage power station. The upper sand storage storehouse (35) is composed of a storehouse body (36), a phase change heat storage and gas storage system, a gas supply system (10) and a sand control valve (7). The upper part of the storage body is a semi-cylindrical body, the lower part is a semi-conical body, and the axial section is funnel-shaped. The invention utilizes the gravitational potential energy of the sand and the fluidization effect of the gas on the sand, reduces the viscous resistance of the sand, forms an air-sand flow, converts the potential energy of the air-sand flow into kinetic energy to do work, and drives a generator to generate electricity. Sand lifting, compressed air storage, and phase-change heat storage when there is surplus electricity to achieve energy storage across time and seasons.

Description

technical field [0001] The invention relates to an energy storage power station. Background technique [0002] It is well known that the uncertainty and instability of photovoltaic and wind power generation cause fluctuations in the power grid, resulting in large-scale curtailment of wind and light, and huge losses for large-scale power plants, especially in Northwest China. Pumped hydro storage, compressed air energy storage, and chemical energy storage are good solutions. Pumped storage has the characteristics of high power and long discharge time, and the efficiency is between 60% and 70%. At present, the largest pumped storage power station in operation in the world is Basconti pumped storage in Virginia, USA. Power station with a capacity of 3 gigawatts and a maximum power generation time of 10 hours and 18 minutes. The pumped storage power station is an important adjustment tool for the power system. It has the advantages of flexible startup and fast adjustment. It i...

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Problems solved by technology

Moreover, the sand is rich in raw materials, no need for water, no pollution and no damage to the ecology. It is especially suitable for cross-time and cross-season energy storage in areas with poor water, high cold, and extreme day and night. It can solve new energy power generation in areas with poor water, high cold, remote areas and extreme day and night The problem of large fluctuations and mismatching load characteristics can avoid the downstream ecological damage and pollution of chemical energy storage after-treatment caused by the construction of pumped storage power stations

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