Supercritical air energy storage system with novel process

A supercritical air and air energy storage technology, which is applied in energy storage, greenhouse gas reduction, climate sustainability, etc., can solve the problems of large storage containers, large irreversible losses, and large land occupation, and achieve broad application prospects, The effect of energy storage efficiency improvement and system cost reduction

Active Publication Date: 2013-04-03
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the supercritical air energy storage system still has the problems of large volume of storage container and low efficiency. The irreversible loss of liquefaction solely relying o

Method used

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  • Supercritical air energy storage system with novel process
  • Supercritical air energy storage system with novel process

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Example Embodiment

[0031] Examples:

[0032] figure 1 This is Embodiment 1 of the supercritical air energy storage system of the novel process of the present invention. Including compression group C1, C2, heat storage / heat exchanger group 2, 5, expansion unit E1, E2, cold storage / heat exchanger group 8, 10, cryogenic storage tank 15, valve 13, 17, cryogenic pump 19, turbo unit T1, T2, generator 29, drive motor 32, pipeline A, 1, 3, 4, 6, 7, 9, 11, 12, 14, 16, 18, 20, 21, 22, 23, 24, 25, 27 , 28, etc.

[0033] The drive motor 32 is fixedly connected to the common drive shafts of the compressor units C1 and C2, and the generator 29 is fixedly connected to the common drive shafts of the turbine units T1 and T2. Compressor groups C1 and C2 are connected to heat storage / heat exchanger groups 2, 5 via pipelines 1, 3, 4, and 6, respectively. The inlet of the low pressure compressor C1 is connected to air. The supercritical air passing through the heat storage / heat exchanger 5 passes through pipelines 6,...

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Abstract

The invention discloses a supercritical air energy storage/release system with a novel process. The off-peak (low price) electricity of the power station is adopted by the system to compress the air to a supercritical state (simultaneously store the heat of compression), an expansion machine is utilized to cool the air, simultaneously the work of expansion is recycled to drive a first-stage compressor to improve the system efficiency, and the stored cold energy is utilized to cool, liquefy and store (store the energy) the supercritical air; at a peak of electricity consumption, the liquid air is compressed and absorbs heat to be supercritical (simultaneously recycles the cold energy), further after absorbing the compression heat or the other industrial exhaust heat, the solar energy central heating and the like, the liquid air drives the generator to generate electricity (release energy) through a turbine. The supercritical air energy storage system disclosed by the invention has the advantages of having high energy density and high efficiency, being free from limitation of the energy storage period and the geography condition, being suitable for a variety of power stations (including regenerative energy power stations such as wind energy), being environment-friendly, being capable of recycling the middle-low temperature (heat value) waste heat, and the like.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a supercritical air energy storage / release system of a novel process. Background technique [0002] Power energy storage technology is currently an important means to adjust the peak and valley of the power grid and improve the economy and stability of the power system. It is one of the most important bottlenecks restricting the large-scale utilization of unstable and intermittent renewable energy. The key technology of power grid. At present, the existing electric energy storage technologies include pumped storage power stations, compressed air, storage batteries, superconducting magnetic energy, flywheels and capacitors. However, due to capacity, energy storage period, energy density, charge and discharge efficiency, lifespan, operating costs, environmental protection and other reasons, only pumped hydropower stations and compressed air have been used in large-scale com...

Claims

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Application Information

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IPC IPC(8): F02C6/16
CPCY02E60/15Y02E70/30Y02E60/16
Inventor 许剑陈海生盛勇刘金超谭春青
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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