Compressed-air energy-storage power generation system using high temperature air-heat combined-storage apparatus

Abstract

The invention discloses a compressed-air energy-storage power generation system using a high temperature air-heat combined-storage apparatus. The system comprises a compression unit, the high temperature air-heat combined-storage apparatus and a turbine generator unit, wherein the inlet of the high temperature air-heat combined-storage apparatus is connected with the outlet of the compression unit, the outlet of the high temperature air-heat combined-storage apparatus is connected with the turbine generator unit, the compression unit is used for compressing air, the high temperature air-heat combined-storage apparatus is used for storing high-temperature high-pressure air compressed by the compression unit, and the high-temperature high-pressure air released by the high temperature air-heat combined-storage apparatus directly drives the turbine generator unit to output electrical work. Since the system employs the high temperature air-heat combined-storage apparatus, simultaneous storage of air and heat in the same storage apparatus is realized, separated storage of air and heat is not needed, and thus, the temperature of stored air can be increased, loss during energy transformation of the system is reduced, and power capability of high-pressure air is enhanced; meanwhile, the high temperature air-heat combined-storage apparatus can be used as a heat storage apparatus and output heat outwardly.

Description

technical field [0001] The invention relates to the field of compressed air energy storage power generation, in particular to a compressed air energy storage power generation system using a high-temperature gas-heat combined storage device. Background technique [0002] A challenging problem currently facing the energy field is the engineering storage of energy. In order to solve the problem of mass storage of energy, a lot of manpower and financial resources have been spent. Energy and power systems are eager to invent a high-density, long-life, fast-response, Non-polluting and affordable energy storage systems. [0003] In recent years, the production of electricity worldwide has continued to increase, and the production scale and application scope of renewable energy (wind energy, solar energy, etc.) are growing at an alarming rate. By the end of 2010, the total installed capacity of wind power in China was 44.7GW The total installed capacity of solar power is 0.86GW; by...

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Problems solved by technology

[0002] A challenging problem currently facing the energy field is the engineering storage of energy. In order to solve the problem of mass storage of energy, a lot of manpower and financial resources have been spent. Energy and power systems are eager to invent a high-density, long-life, fast-response, Non-polluting and affordable energy storage system

[0003] In recent years, the production of electricity worldwide has continued to increase, and the production scale and application scope of renewable energy (wind energy, solar energy, etc.) are growing at an alarming rate. By the end of 2010, the total installed capacity of wind power in China was 44.7GW The total installed capacity of solar power is 0.86GW; by 2015 and 2020, the total installed capacity of wind power in China will reach 130GW and 200GW respectively, and the total installed capacity of solar power will reach 10GW and 50GW respectively. However, the power generation characteristics of this renewable energy are subject to natural conditions. Taking wind power as an example, the design value of the average annual utilization hours of wind turbines in China in 2012 was 2300h, the actual value was 1900h, and even less than 1500h in some areas, resulting in a large number of abandoned wind power; At the same time, the construction of the power transmission network is relatively lagging behind, and the peak-shaving capacity of the power grid is generally insufficient. At present, due to the existence of a peak power supply shortage, a considerable-scale power grid has to adopt mandatory power cuts, which hinders the development of productivity. And it may cause social problems; at the user end, the power consumption is not constant within a day. According to the statistics of the National Power Dispatching and Communication Center, the amplitude of the "peak-valley difference" of China's power grid load increases year by year

The heat obtained from the combustion process is high, and the process is mature, but the pollutant emission problem caused by combustion is an unavoidable restrictive factor. Traditional gas turbines will generate a large amount of carbon emissions, which require further treatment of carbon emissions. For the current environment The comprehensive consideration of the problem and the economic benefits are unfavorable

The compressed air energy storage method in the form of heat recovery needs to store and utilize heat. During the process of heat storage, heat transfer and heat conversion, a considerable part of heat will be lost, which will affect the system efficiency.

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