Supercritical carbon dioxide brayton cycle system and methods of using the same

By introducing a thermal storage device into a supercritical carbon dioxide Brayton cycle system, the problem of slow system response can be solved by rapidly storing and releasing high-temperature and high-pressure working fluid, thus achieving rapid load adjustment and efficient energy utilization.

CN116044530BActive Publication Date: 2026-06-26TIANJIN UNIV +1
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Patent Information

Application Number
CN202210435422.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-04-24
Publication Date
2026-06-26
Estimated Expiration
2042-04-24

AI Technical Summary

Technical Problem

Existing supercritical carbon dioxide Brayton cycle systems exhibit slow load regulation response under off-design conditions, and traditional regulation methods such as valve bypass or throttling lead to reduced energy utilization and slow inventory control response.

Method used

A thermal storage device is used to store a high-temperature and high-pressure working fluid in the thermal storage device when the load decreases, and release the working fluid to do work when the load increases, so as to achieve rapid load adjustment and use the high-temperature and high-pressure working fluid in the thermal storage device for system regulation.

Benefits of technology

It achieves rapid load adjustment while maintaining high system thermal efficiency, improves energy utilization, and avoids the efficiency loss of traditional adjustment methods.

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Abstract

The application discloses a supercritical carbon dioxide Brayton cycle system and a use method thereof, and the supercritical carbon dioxide Brayton cycle system comprises a heat source, an sCO2 Brayton cycle system and a heat storage device; wherein a working medium side outlet of the heat source is connected with a working medium input end of the sCO2 Brayton cycle system, and a working medium side inlet of the heat source is connected with a working medium output end of the sCO2 Brayton cycle system; the heat storage device is arranged between the working medium side outlet of the heat source and the working medium input end of the sCO2 Brayton cycle system; the heat storage device is used for storing working medium flowed out of the heat source, and adjusting a load in the system by discharging the working medium flowed out of the heat source into the sCO2 Brayton cycle system. The application discloses a supercritical carbon dioxide Brayton cycle system capable of rapidly adjusting the load, wherein the heat storage device is used for storing high-temperature and high-pressure working medium when the load is reduced, and releasing the high-temperature and high-pressure working medium when the load is increased, so that the load can be rapidly adjusted, and a high system thermal efficiency can be maintained.
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