Coupled energy systems, methods, devices, and media based on compressed carbon dioxide
By dividing low-pressure CO2 into three parts and treating them specifically, and utilizing solar energy and interstage cooling units to recover the heat of compression, the problem of insufficient heat in existing technologies is solved, achieving efficient energy utilization and comprehensive resource utilization, and improving the efficiency and environmental friendliness of energy storage systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HARBIN INST OF TECH
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
In existing compressed CO2 energy storage systems, the heat required by the adsorbent during adsorption/desorption is far greater than the system's own recoverable heat of compression and expansion. This necessitates the introduction of a high-quality heat source, reducing energy storage efficiency, and the excess heat during the energy release phase results in energy waste.
By dividing the desorbed low-pressure CO2 into three parts and using a solar heat exchange unit to make up the heat gap between desorption heat and compression heat, and combining interstage cooling and reheating units to recover compression heat, high-efficiency energy utilization is achieved. In the adsorption stage, the adsorption heat is used for brine desalination and expansion work, realizing multi-stage energy utilization and comprehensive resource utilization.
It improves the heat utilization efficiency of the adsorption-desorption process, reduces dependence on external energy, lowers operating costs, increases energy self-sufficiency and environmental friendliness, and realizes gas-heat co-storage.
Smart Images
Figure CN122407327A_ABST