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Power generation method and system for achieving new energy storage through carbon dioxide liquefaction

A carbon dioxide and power generation system technology, applied in the direction of electric energy storage system, wind power generation, energy storage, etc., can solve the problems of low critical temperature of air, difficulty in realizing low-temperature liquid storage, etc., and achieve the effect of high energy conversion efficiency

Pending Publication Date: 2021-10-29
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the critical temperature of air is very low (-140.62°C), and there are certain difficulties in realizing cryogenic liquid storage.

Method used

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  • Power generation method and system for achieving new energy storage through carbon dioxide liquefaction

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Experimental program
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Embodiment Construction

[0019] The present invention is described in further detail below in conjunction with embodiment.

[0020] like figure 1 Shown: When the grid load is sufficient, wind power and photovoltaic new energy power generation cannot be connected to the grid, and there will be wind and light curtailment. At this time, wind power and photovoltaic power generation drives the carbon dioxide liquefaction compressor 2 to liquefy carbon dioxide gas through the generator 1, and the liquefied carbon dioxide enters the liquefied carbon dioxide storage tank 4 through the check valve 3 for storage, realizing the conversion of electric power in the form of liquid carbon dioxide store.

[0021] When wind power and photovoltaic new energy can be connected to the grid normally, except when wind power and photovoltaic new energy power generation are normally connected to the grid, after the liquid carbon dioxide in the liquefied carbon dioxide storage tank 4 passes through the check valve 5, the high...

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Abstract

The invention provides a power generation method and system for achieving new energy storage through carbon dioxide liquefaction. The system comprises a carbon dioxide liquefaction compressor, the carbon dioxide liquefaction compressor is connected with a power generator, and wind power and photovoltaic power generation drives the carbon dioxide liquefaction compressor to liquefy carbon dioxide gas through the power generator; the liquefied carbon dioxide enters a liquefied carbon dioxide storage tank to be stored, one end of the output end of the liquefied carbon dioxide storage tank is connected with the power generator through a carbon dioxide gas turbine, and the other end is connected with the carbon dioxide gas turbine through a heat exchanger; and the carbon dioxide gas turbine enables the carbon dioxide gas cooled by the heat exchanger to be connected with the carbon dioxide liquefaction compressor through a circulating pump. According to the power generation method and system, new energy can be consumed on a large scale, energy is stored, and electric power can be continuously and stably output according to needs.

Description

technical field [0001] The invention belongs to the technical field of energy storage and power generation industry, and in particular relates to a power generation method and system for realizing new energy storage by liquefying carbon dioxide. Background technique [0002] At present, the output power and frequency of wind power and photovoltaic new energy are unstable, which has an impact on the security and stability of the power grid, and also affects the consumption of new energy. A certain amount of abandoned wind and light is common. For example, the amount of sunlight in winter is insufficient, and the wind power fluctuates at different times, which will limit the dispatching effect of solar and wind power plants. If there is insufficient power in the system, the energy storage unit can be used to achieve continuous power supply. For new energy sources with unstable output power and frequency and low-quality electric energy, conventional energy sources such as ther...

Claims

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Application Information

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IPC IPC(8): F03D9/17F01K25/10H02J3/28H02J15/00
CPCF03D9/17F01K25/103H02J3/28H02J15/006Y02E60/16Y02E70/30Y02E10/76Y02E10/56Y02E10/72
Inventor 王一丰肖俊峰高松胡孟起夏林
Owner XIAN THERMAL POWER RES INST CO LTD