Multi-energy cooperative driving type S-CO2 energy storage system and method suitable for industrial park

By constructing a multi-energy synergistic S-CO2 energy storage system, the problems of unstable compressor inlet conditions and insufficient utilization of low-grade waste heat have been solved, realizing the stable operation and efficient energy utilization of the supercritical carbon dioxide energy storage system, which is suitable for the multi-energy supply needs of industrial parks.

CN122280673APending Publication Date: 2026-06-26BEIJING UNIV OF CHEM TECH
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Patent Information

Application Number
CN202610424587.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-01
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing supercritical carbon dioxide energy storage technologies suffer from problems such as unstable compressor inlet conditions, significant pressure fluctuations during tank charging and discharging, insufficient utilization of low-grade waste heat, and low overall system energy utilization rate. They also lack full-process pressure stabilization and multi-energy collaborative drive design.

Method used

Construct a multi-energy synergistic S-CO2 energy storage system, including an energy storage, pressure stabilization, and temperature control subsystem, a compression heat storage subsystem, a multi-energy cascade heat replenishment subsystem, and an expansion work and regeneration subsystem. Through precise temperature control, full-process pressure stabilization, and cascade heat utilization, achieve full-process supercritical stable operation of the working fluid and efficient utilization of multi-grade heat energy.

Benefits of technology

Significantly reduces compression power consumption, improves system stability and efficiency, enables multi-energy supply in the park, increases overall energy efficiency by more than 30%, and meets the needs of zero-carbon parks.

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Abstract

The invention discloses a multi-energy cooperative driving type S-CO2 energy storage system and method suitable for an industrial park, and relates to the technical field of supercritical carbon dioxide energy storage and park comprehensive energy utilization. The system comprises an energy storage, pressure stabilization and temperature control subsystem, a compression heat storage subsystem, a multi-energy cascade heat compensation subsystem and an expansion acting and heat regeneration subsystem. A low-pressure working medium is compressed to store energy after being subjected to pressure stabilization and temperature adjustment, compression heat is stored, first-stage heat compensation is implemented in the energy release stage, second-stage heat compensation is achieved through low-grade waste heat of an S-CO2 heat pump unit quality improvement park, preheating and third-stage heat compensation are implemented through a main heat regenerator and a solar heat collection fused salt heat storage unit, and the working medium enters a main expansion unit to do work for power generation; and heat source fluctuation and temperature and pressure disturbance are restrained through cooperative adjustment, and the working medium is kept in a supercritical stable operation state in the whole process. According to the invention, efficient storage of electric energy, gradient utilization of multi-grade heat energy and cooperative operation of power supply and heat supply in the park can be realized.
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