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Air compressing energy storage system

A technology of compressed air energy storage and air, applied in steam engine installations, machines/engines, mechanical equipment, etc., can solve the problems of energy storage and energy release pressure difference, low compressor operation efficiency, large pressure loss, etc., to reduce The effect of power consumption, improving operating efficiency, and reducing energy loss in throttling and depressurization

Active Publication Date: 2015-06-03
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] However, when the CAES system is storing energy, the compressor is always operating under variable working conditions, and the operating efficiency of the compressor is low; when releasing energy, the high-pressure air in the air storage chamber needs to be released to the inlet pressure of the turbine, resulting in a gap between energy storage and energy release. The pressure difference (pressure loss) is huge, which ultimately leads to a lower system efficiency

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the...

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Abstract

The invention provides an air compressing energy storage system. The air compressing energy storage system adopts grading operation of a compressor, reduces the range of working condition changing operation of a compressor, and promotes the operating efficiency of the compressor; simultaneously, the system adopts the grading operation of an expansion machine, so as to make the air pressure in an air storage chamber able to realize gradient utilization, and the loss of pressure energy is reduced.

Description

technical field [0001] The invention relates to the technical field of energy storage and utilization, in particular to a compressed air energy storage system. Background technique [0002] Compressed air energy storage system (CAES) is an energy storage system based on gas turbine technology developed in the 1950s. The system uses low-peak electricity to compress air and store it in the gas storage chamber, so that the electric energy is converted into air internal energy and stored; at the peak of power consumption, high-pressure air is released from the gas storage chamber and enters the combustion chamber of the gas turbine to burn together with fuel. Then drive the turbine to generate electricity. At present, countries such as Germany (Huntorf60MWh) and the United States (McIntosh110MW, Ohio9×300MW, Texas4×135MW and Iowa200MW projects, etc.) have built CAES commercial operation power stations, and Japan, Switzerland, Russia, France, Italy, Luxembourg, Israel and South ...

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Application Information

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IPC IPC(8): F01K27/00
Inventor 徐玉杰陈海生谭春青刘畅许剑张新敬
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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