Supercritical CO2 solar power generation system and method combining hydrogen production energy storage and fuel cell technologies

Abstract

The invention discloses a supercritical CO2 solar power generation system and method combining hydrogen production, energy storage and fuel cell technologies. An outlet of a solar thermal collector iscommunicated with an inlet of a supercritical carbon dioxide Brayton cycle power generation system, and an inlet of the solar thermal collector is communicated with an outlet of the supercritical carbon dioxide Brayton cycle power generation system. The output end of the supercritical carbon dioxide Brayton cycle power generation system is connected with an external power grid and a power interface of an electrolytic tank, an oxygen outlet of the electrolytic tank is communicated with an oxygen inlet in a carbonate fuel cell system, and a hydrogen outlet of the electrolytic tank is communicated with a hydrogen inlet of the carbonate fuel cell system. The output end of the carbonate fuel cell system is connected with the external power grid. The system and the method have the advantages that the supercritical carbon dioxide Brayton cycle power generation system, an electrolytic hydrogen production system and the carbonate fuel cell system can be integrated, and accordingly solar energystorage and stable electric power output can be realized.

Description

technical field [0001] The invention relates to a solar power generation system and method, in particular to a supercritical CO combined with hydrogen production energy storage and fuel cell technology 2 Solar power generation system and method. Background technique [0002] Solar energy is an inexhaustible clean energy source. Because solar thermal power generation can theoretically reach the same high temperature as the sun’s temperature, and as we all know, the higher the temperature, the higher the thermal efficiency, so solar thermal power generation has attracted more and more attention. . [0003] Photothermal power generation needs to convert light energy into heat energy, and then realize thermoelectric conversion through a thermodynamic cycle. At present, among many thermodynamic cycles, the supercritical Brayton cycle is the most advantageous cycle form. New supercritical working fluids such as carbon dioxide, helium and nitrous oxide have inherent advantages su...

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Problems solved by technology

[0004] However, solar energy not only has periodic changes in daily radiation, but also seasonal changes in radiation, and will be affected by weather factors such as rain at any time

At present, it is theoretically possible to use relatively cheap heat storage energy storage to solve the problem of uneven distribution of solar energy day and night, which is also one of the important advantages of solar thermal power generation. However, the thermal cycle hopes to increase the thermal efficiency by increasing the maximum temperature of the cycle. With the increase of the maximum temperature, the heat storage temperature is also continuously increased, which brings greater difficulties to heat storage materials, heat storage system containers, heat preservation measures, etc.

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