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Supercritical carbon dioxide power generation system and method for liquid-state air energy storage

A technology of liquid air and carbon dioxide, which is applied in the direction of machines/engines, steam engine devices, mechanical equipment, etc., can solve the problems of equipment deviation from the optimal design working point, lower economy and safety, and lower system power generation efficiency, etc., to improve The effect of power generation output, high power generation efficiency, and system efficiency improvement

Pending Publication Date: 2019-04-26
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

The traditional thermal power peak regulation method is to reduce the load of power generation. The biggest disadvantage of this method is that it will lead to a decrease in the power generation efficiency of the system, and each equipment will seriously deviate from the optimal design point, which will greatly reduce the economy and safety.

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  • Supercritical carbon dioxide power generation system and method for liquid-state air energy storage

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Embodiment Construction

[0018] The present invention is described in further detail below in conjunction with accompanying drawing:

[0019] refer to figure 1 According to the present invention, a supercritical carbon dioxide power generation system containing liquid air energy storage includes a liquid air energy storage subsystem and a coal-based supercritical carbon dioxide power generation subsystem.

[0020] In the liquid air energy storage subsystem, the air from the environment is filtered and purified by the air filter 10 and connected to the inlet of the first-stage compressor 11, and the compressed high-temperature air passes through the outlet of the first-stage compressor 11 It is connected with the inlet of the first-stage compression heat storage tank 12, and the high-temperature air exchanges heat with the heat storage medium in the first-stage compression heat storage tank 12 to store heat in the first-stage compression heat storage tank 12. The high-temperature air outlet of the com...

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Abstract

The invention discloses a supercritical carbon dioxide power generation system and method for liquid-state air energy storage. The system comprises a liquid-state air energy storage subsystem and a coal base supercritical carbon dioxide power generation subsystem; and an air and tail gas outlet of the liquid-state air energy storage subsystem communicates with an inlet of an air preheater of the coal base supercritical carbon dioxide power generation subsystem. The coal base supercritical carbon dioxide power generation is combined with the liquid-state air energy storage, so that the requirement of a power grid absorbing large-scale renewable energy power generation can be met without reducing the load of a thermal power generating unit, and meanwhile, the power generation capacity of a traditional coal base supercritical carbon dioxide power generation unit can be improved; and the system has the advantages of high power generation efficiency, high peak adjusting flexibility and higheconomy.

Description

technical field [0001] The invention belongs to the technical field of advanced high-efficiency thermal power generation, and specifically relates to a supercritical carbon dioxide power generation system and method with liquid air energy storage. Background technique [0002] my country's coal-based energy endowment determines the important position of coal-fired thermal power generation in my country's power structure for a long time to come. Continuously improving the efficiency of thermal power units is the eternal theme and goal of power industry research. A large number of studies have confirmed that the supercritical carbon dioxide Brayton cycle is a new concept advanced power system with great potential. Because supercritical carbon dioxide has the characteristics of high energy density and high heat transfer efficiency, the power generation efficiency of supercritical carbon dioxide Brayton cycle power generation system is more than 5 percentage points higher than ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/32F01K11/02F01K13/00F01K25/10
CPCF01K7/32F01K11/02F01K13/00F01K25/103
Inventor 白文刚张磊顾正萌杨玉李红智姚明宇
Owner XIAN THERMAL POWER RES INST CO LTD
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