一种LNG冷能利用系统及方法
By combining the organic Rankine cycle and the intermediate medium cold storage unit, the problems of solidification risk and low cold energy utilization efficiency in the carbon dioxide energy storage process are solved, realizing safe and efficient LNG cold energy utilization, which is suitable for LNG cold energy utilization systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHEAST UNIV
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-17
AI Technical Summary
Carbon dioxide storage requires low-temperature cooling and liquefaction. However, since the triple point temperature of carbon dioxide is -56.6℃, which is much higher than the -162℃ of LNG storage, direct heat exchange with LNG can lead to the risk of carbon dioxide solidification. In addition, LNG has low cold energy utilization efficiency and there is cold energy loss.
The system employs an organic Rankine cycle power generation unit to heat LNG to -70~-40℃, transfers the cold energy to the intermediate medium through an intermediate medium cold storage unit, and then transfers it to the carbon dioxide energy storage unit. This avoids direct heat exchange and utilizes the intermediate medium storage tank to control the flow rate and time, ensuring the system's safety and efficiency.
It achieves safety in the carbon dioxide energy storage process and efficient utilization of LNG cold energy, avoids carbon dioxide condensation, improves the overall system efficiency, and reduces cold energy loss in the LNG gasification process.
Smart Images
Figure CN120487309B_ABST