A solar energy conversion system and method of operation thereof

By deeply integrating solar-powered hydrogen production with supercritical carbon dioxide Brayton cycle, the entire process of solar thermal energy utilization and working fluid closed-loop circulation has been realized, solving the problems of low integration and poor temperature control accuracy, improving energy utilization and operational stability, and avoiding environmental thermal pollution.

CN122649985APending Publication Date: 2026-08-28CHINA THREE GORGES UNIV
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Patent Information

Application Number
CN202610626152.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-08
Publication Date
2026-08-28

AI Technical Summary

Technical Problem

Existing solar-powered hydrogen production and power generation coupling systems suffer from low integration, insufficient utilization of thermal energy, poor temperature control accuracy of core components, high consumption of working fluid, and low overall energy utilization rate, resulting in poor operational stability and serious environmental thermal pollution.

Method used

Design a solar energy conversion system including a hydrogen and oxygen production and storage unit, a combustion power generation unit, and a flue gas treatment unit. By deeply integrating solar thermal collection, hydrogen production, oxygen-enriched combustion, and supercritical carbon dioxide work, a closed-loop circulation of the working fluid and active temperature control are achieved. Circulating carbon dioxide is used as a diluent and coolant to precisely control the temperature of core components and achieve full-process cascade utilization.

Benefits of technology

It improves the overall energy utilization rate of the system, extends the life of core components, reduces the consumption of cooling water and carbon dioxide, ensures the stability of power generation output, and avoids environmental thermal pollution.

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Abstract

The application discloses a solar energy conversion system and an operation method thereof, and belongs to the technical field of renewable energy utilization. The system comprises a hydrogen and oxygen preparation and storage unit, a combustion and power generation unit and a flue gas treatment unit. A solar light condensation high-temperature heat collector supplies heat for a hydrogen preparation device to decompose water to prepare hydrogen and oxygen, the hydrogen and oxygen are stored after being cooled and compressed, and are sent into a combustion chamber to be mixed with circulating carbon dioxide to realize oxygen-rich combustion, supercritical carbon dioxide-water vapor flue gas is generated to drive a gas turbine to generate power, the flue gas is subjected to waste heat recovery and condensation separation, water is returned to the hydrogen preparation in a closed loop, and the pressurized carbon dioxide is branched to control the temperature of the combustion chamber and the gas turbine, so that full circulation of the working medium and cascade heat exchange are realized. The solar hydrogen preparation and supercritical carbon dioxide circulation are deeply integrated, energy utilization rate is high, and operation is stable. The application can solve problems of intermittency of solar energy, low efficiency of a traditional system, large thermal pollution and the like, is energy-saving and environment-friendly, and is good in economy.
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