A supercritical carbon dioxide (sco2) brayton split-reexpansion reverse cycle heat pump coupled with a split recompression positive cycle heat engine energy storage system and control method
By coupling an sCO2 Brayton split-reexpansion reverse cycle heat pump with a split-recompression positive cycle heat engine energy storage system, the problems of low cycle coupling, environmental adaptability and low heat source utilization of existing energy storage technologies are solved. It realizes efficient electro-thermal conversion and multi-heat source synergistic utilization, and is suitable for park-level integrated energy systems in complex environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING UNIV OF CHEM TECH
- Filing Date
- 2026-04-01
- Publication Date
- 2026-07-17
AI Technical Summary
Existing energy storage technologies suffer from insufficient cycle coupling, inadequate environmental adaptability, and low utilization rate of low-grade heat sources, making them unable to meet the needs of multi-heat source synergistic utilization in large-scale and complex environments.
A coupled energy storage system is constructed by using a supercritical carbon dioxide Brayton split-reexpansion reverse cycle heat pump and a split-recompression positive cycle heat engine. By using supercritical carbon dioxide as the unified working fluid and combining it with molten salt and heat storage medium, a closed-loop coupling system for energy storage and release is built. This system achieves efficient electro-thermal energy conversion and energy cascade utilization, integrates multi-source heat exchange and working fluid regulation, and is adaptable to complex environments and multi-heat source conditions.
It achieves efficient electro-thermal conversion and energy storage and release, improves the overall system cycle efficiency, adapts to different climate and resource conditions, integrates renewable energy and industrial waste heat, enhances the system's environmental adaptability and regional universality, and is suitable for park-level integrated energy systems.
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Figure CN122407313A_ABST